From 887975834dea744dde636dd73bbd1e597f211d7d Mon Sep 17 00:00:00 2001 From: Benedict Wong Date: Thu, 5 Jan 2023 21:28:12 +0000 Subject: [PATCH 01/21] Fix XFRM-I support for nested ESP tunnels [ Upstream commit b0355dbbf13c0052931dd14c38c789efed64d3de ] This change adds support for nested IPsec tunnels by ensuring that XFRM-I verifies existing policies before decapsulating a subsequent policies. Addtionally, this clears the secpath entries after policies are verified, ensuring that previous tunnels with no-longer-valid do not pollute subsequent policy checks. This is necessary especially for nested tunnels, as the IP addresses, protocol and ports may all change, thus not matching the previous policies. In order to ensure that packets match the relevant inbound templates, the xfrm_policy_check should be done before handing off to the inner XFRM protocol to decrypt and decapsulate. Notably, raw ESP/AH packets did not perform policy checks inherently, whereas all other encapsulated packets (UDP, TCP encapsulated) do policy checks after calling xfrm_input handling in the respective encapsulation layer. Test: Verified with additional Android Kernel Unit tests Signed-off-by: Benedict Wong Signed-off-by: Steffen Klassert Signed-off-by: Sasha Levin --- net/xfrm/xfrm_interface.c | 54 ++++++++++++++++++++++++++++++++++++--- net/xfrm/xfrm_policy.c | 3 +++ 2 files changed, 53 insertions(+), 4 deletions(-) diff --git a/net/xfrm/xfrm_interface.c b/net/xfrm/xfrm_interface.c index da518b4ca84c..e4f21a692415 100644 --- a/net/xfrm/xfrm_interface.c +++ b/net/xfrm/xfrm_interface.c @@ -207,6 +207,52 @@ static void xfrmi_scrub_packet(struct sk_buff *skb, bool xnet) skb->mark = 0; } +static int xfrmi_input(struct sk_buff *skb, int nexthdr, __be32 spi, + int encap_type, unsigned short family) +{ + struct sec_path *sp; + + sp = skb_sec_path(skb); + if (sp && (sp->len || sp->olen) && + !xfrm_policy_check(NULL, XFRM_POLICY_IN, skb, family)) + goto discard; + + XFRM_SPI_SKB_CB(skb)->family = family; + if (family == AF_INET) { + XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); + XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; + } else { + XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct ipv6hdr, daddr); + XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6 = NULL; + } + + return xfrm_input(skb, nexthdr, spi, encap_type); +discard: + kfree_skb(skb); + return 0; +} + +static int xfrmi4_rcv(struct sk_buff *skb) +{ + return xfrmi_input(skb, ip_hdr(skb)->protocol, 0, 0, AF_INET); +} + +static int xfrmi6_rcv(struct sk_buff *skb) +{ + return xfrmi_input(skb, skb_network_header(skb)[IP6CB(skb)->nhoff], + 0, 0, AF_INET6); +} + +static int xfrmi4_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) +{ + return xfrmi_input(skb, nexthdr, spi, encap_type, AF_INET); +} + +static int xfrmi6_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) +{ + return xfrmi_input(skb, nexthdr, spi, encap_type, AF_INET6); +} + static int xfrmi_rcv_cb(struct sk_buff *skb, int err) { const struct xfrm_mode *inner_mode; @@ -780,8 +826,8 @@ static struct pernet_operations xfrmi_net_ops = { }; static struct xfrm6_protocol xfrmi_esp6_protocol __read_mostly = { - .handler = xfrm6_rcv, - .input_handler = xfrm_input, + .handler = xfrmi6_rcv, + .input_handler = xfrmi6_input, .cb_handler = xfrmi_rcv_cb, .err_handler = xfrmi6_err, .priority = 10, @@ -831,8 +877,8 @@ static struct xfrm6_tunnel xfrmi_ip6ip_handler __read_mostly = { #endif static struct xfrm4_protocol xfrmi_esp4_protocol __read_mostly = { - .handler = xfrm4_rcv, - .input_handler = xfrm_input, + .handler = xfrmi4_rcv, + .input_handler = xfrmi4_input, .cb_handler = xfrmi_rcv_cb, .err_handler = xfrmi4_err, .priority = 10, diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 0d12bdf59d4c..d15aa62887de 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -3710,6 +3710,9 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, goto reject; } + if (if_id) + secpath_reset(skb); + xfrm_pols_put(pols, npols); return 1; } From 1f3a209b2f4ec238d4b0c77b558527e7dab52aab Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Fri, 25 Nov 2022 15:41:34 +0100 Subject: [PATCH 02/21] arm64: dts: rockchip: drop unused LED mode property from rk3328-roc-cc [ Upstream commit 1692bffec674551163a7a4be32f59fdde04ecd27 ] GPIO LEDs do not have a 'mode' property: rockchip/rk3328-roc-pc.dtb: leds: led-0: Unevaluated properties are not allowed ('mode' was unexpected) Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20221125144135.477144-1-krzysztof.kozlowski@linaro.org Signed-off-by: Heiko Stuebner Signed-off-by: Sasha Levin --- arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts index daa9a0c601a9..22ab5e1d7319 100644 --- a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts +++ b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts @@ -91,7 +91,6 @@ linux,default-trigger = "heartbeat"; gpios = <&rk805 1 GPIO_ACTIVE_LOW>; default-state = "on"; - mode = <0x23>; }; user_led: led-1 { @@ -99,7 +98,6 @@ linux,default-trigger = "mmc1"; gpios = <&rk805 0 GPIO_ACTIVE_LOW>; default-state = "off"; - mode = <0x05>; }; }; }; From abbf52efadebc1aba898d4493ffed22de5dc29f6 Mon Sep 17 00:00:00 2001 From: Johan Jonker Date: Wed, 28 Dec 2022 21:17:32 +0100 Subject: [PATCH 03/21] ARM: dts: rockchip: add power-domains property to dp node on rk3288 [ Upstream commit 80422339a75088322b4d3884bd12fa0fe5d11050 ] The clocks in the Rockchip rk3288 DisplayPort node are included in the power-domain@RK3288_PD_VIO logic, but the power-domains property in the dp node is missing, so fix it. Signed-off-by: Johan Jonker Link: https://lore.kernel.org/r/dab85bfb-9f55-86a1-5cd5-7388c43e0ec5@gmail.com Signed-off-by: Heiko Stuebner Signed-off-by: Sasha Levin --- arch/arm/boot/dts/rk3288.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi index 9051fb4a267d..aab28161b9ae 100644 --- a/arch/arm/boot/dts/rk3288.dtsi +++ b/arch/arm/boot/dts/rk3288.dtsi @@ -1203,6 +1203,7 @@ clock-names = "dp", "pclk"; phys = <&edp_phy>; phy-names = "dp"; + power-domains = <&power RK3288_PD_VIO>; resets = <&cru SRST_EDP>; reset-names = "dp"; rockchip,grf = <&grf>; From 8e833fe47f45c4e43f40f8bb6cf7088879dd3139 Mon Sep 17 00:00:00 2001 From: Vishal Verma Date: Wed, 25 Jan 2023 11:34:18 -0700 Subject: [PATCH 04/21] ACPI: NFIT: fix a potential deadlock during NFIT teardown [ Upstream commit fb6df4366f86dd252bfa3049edffa52d17e7b895 ] Lockdep reports that acpi_nfit_shutdown() may deadlock against an opportune acpi_nfit_scrub(). acpi_nfit_scrub () is run from inside a 'work' and therefore has already acquired workqueue-internal locks. It also acquiires acpi_desc->init_mutex. acpi_nfit_shutdown() first acquires init_mutex, and was subsequently attempting to cancel any pending workqueue items. This reversed locking order causes a potential deadlock: ====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc3 #116 Tainted: G O N ------------------------------------------------------ libndctl/1958 is trying to acquire lock: ffff888129b461c0 ((work_completion)(&(&acpi_desc->dwork)->work)){+.+.}-{0:0}, at: __flush_work+0x43/0x450 but task is already holding lock: ffff888129b460e8 (&acpi_desc->init_mutex){+.+.}-{3:3}, at: acpi_nfit_shutdown+0x87/0xd0 [nfit] which lock already depends on the new lock. ... Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&acpi_desc->init_mutex); lock((work_completion)(&(&acpi_desc->dwork)->work)); lock(&acpi_desc->init_mutex); lock((work_completion)(&(&acpi_desc->dwork)->work)); *** DEADLOCK *** Since the workqueue manipulation is protected by its own internal locking, the cancellation of pending work doesn't need to be done under acpi_desc->init_mutex. Move cancel_delayed_work_sync() outside the init_mutex to fix the deadlock. Any work that starts after acpi_nfit_shutdown() drops the lock will see ARS_CANCEL, and the cancel_delayed_work_sync() will safely flush it out. Reported-by: Dan Williams Signed-off-by: Vishal Verma Link: https://lore.kernel.org/r/20230112-acpi_nfit_lockdep-v1-1-660be4dd10be@intel.com Signed-off-by: Dan Williams Signed-off-by: Sasha Levin --- drivers/acpi/nfit/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index 99e23a5df026..2306abb09f7f 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -3687,8 +3687,8 @@ void acpi_nfit_shutdown(void *data) mutex_lock(&acpi_desc->init_mutex); set_bit(ARS_CANCEL, &acpi_desc->scrub_flags); - cancel_delayed_work_sync(&acpi_desc->dwork); mutex_unlock(&acpi_desc->init_mutex); + cancel_delayed_work_sync(&acpi_desc->dwork); /* * Bounce the nvdimm bus lock to make sure any in-flight From 6195cea4c738146f6665f71944325766daef1a5f Mon Sep 17 00:00:00 2001 From: David Sterba Date: Tue, 24 Jan 2023 20:32:10 +0100 Subject: [PATCH 05/21] btrfs: send: limit number of clones and allocated memory size [ Upstream commit 33e17b3f5ab74af12aca58c515bc8424ff69a343 ] The arg->clone_sources_count is u64 and can trigger a warning when a huge value is passed from user space and a huge array is allocated. Limit the allocated memory to 8MiB (can be increased if needed), which in turn limits the number of clone sources to 8M / sizeof(struct clone_root) = 8M / 40 = 209715. Real world number of clones is from tens to hundreds, so this is future proof. Reported-by: syzbot+4376a9a073770c173269@syzkaller.appspotmail.com Signed-off-by: David Sterba Signed-off-by: Sasha Levin --- fs/btrfs/send.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index 4a6ba0997e39..b081b61e97c8 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -7276,10 +7276,10 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg) /* * Check that we don't overflow at later allocations, we request * clone_sources_count + 1 items, and compare to unsigned long inside - * access_ok. + * access_ok. Also set an upper limit for allocation size so this can't + * easily exhaust memory. Max number of clone sources is about 200K. */ - if (arg->clone_sources_count > - ULONG_MAX / sizeof(struct clone_root) - 1) { + if (arg->clone_sources_count > SZ_8M / sizeof(struct clone_root)) { ret = -EINVAL; goto out; } From 065f6a66339226fe33d18998afa8533076751444 Mon Sep 17 00:00:00 2001 From: Dean Luick Date: Mon, 9 Jan 2023 14:04:08 -0500 Subject: [PATCH 06/21] IB/hfi1: Assign npages earlier [ Upstream commit f9c47b2caa7ffc903ec950b454b59c209afe3182 ] Improve code clarity and enable earlier use of tidbuf->npages by moving its assignment to structure creation time. Signed-off-by: Dean Luick Signed-off-by: Dennis Dalessandro Link: https://lore.kernel.org/r/167329104884.1472990.4639750192433251493.stgit@awfm-02.cornelisnetworks.com Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hfi1/user_exp_rcv.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.c b/drivers/infiniband/hw/hfi1/user_exp_rcv.c index 897923981855..0e0be6c62e3d 100644 --- a/drivers/infiniband/hw/hfi1/user_exp_rcv.c +++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.c @@ -202,16 +202,11 @@ static void unpin_rcv_pages(struct hfi1_filedata *fd, static int pin_rcv_pages(struct hfi1_filedata *fd, struct tid_user_buf *tidbuf) { int pinned; - unsigned int npages; + unsigned int npages = tidbuf->npages; unsigned long vaddr = tidbuf->vaddr; struct page **pages = NULL; struct hfi1_devdata *dd = fd->uctxt->dd; - /* Get the number of pages the user buffer spans */ - npages = num_user_pages(vaddr, tidbuf->length); - if (!npages) - return -EINVAL; - if (npages > fd->uctxt->expected_count) { dd_dev_err(dd, "Expected buffer too big\n"); return -EINVAL; @@ -238,7 +233,6 @@ static int pin_rcv_pages(struct hfi1_filedata *fd, struct tid_user_buf *tidbuf) return pinned; } tidbuf->pages = pages; - tidbuf->npages = npages; fd->tid_n_pinned += pinned; return pinned; } @@ -316,6 +310,7 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd, mutex_init(&tidbuf->cover_mutex); tidbuf->vaddr = tinfo->vaddr; tidbuf->length = tinfo->length; + tidbuf->npages = num_user_pages(tidbuf->vaddr, tidbuf->length); tidbuf->psets = kcalloc(uctxt->expected_count, sizeof(*tidbuf->psets), GFP_KERNEL); if (!tidbuf->psets) { From 2fd5059f4fdf4df813414fe85f732187554528a3 Mon Sep 17 00:00:00 2001 From: Julian Anastasov Date: Thu, 2 Feb 2023 17:25:51 +0200 Subject: [PATCH 07/21] neigh: make sure used and confirmed times are valid [ Upstream commit c1d2ecdf5e38e3489ce8328238b558b3b2866fe1 ] Entries can linger in cache without timer for days, thanks to the gc_thresh1 limit. As result, without traffic, the confirmed time can be outdated and to appear to be in the future. Later, on traffic, NUD_STALE entries can switch to NUD_DELAY and start the timer which can see the invalid confirmed time and wrongly switch to NUD_REACHABLE state instead of NUD_PROBE. As result, timer is set many days in the future. This is more visible on 32-bit platforms, with higher HZ value. Why this is a problem? While we expect unused entries to expire, such entries stay in REACHABLE state for too long, locked in cache. They are not expired normally, only when cache is full. Problem and the wrong state change reported by Zhang Changzhong: 172.16.1.18 dev bond0 lladdr 0a:0e:0f:01:12:01 ref 1 used 350521/15994171/350520 probes 4 REACHABLE 350520 seconds have elapsed since this entry was last updated, but it is still in the REACHABLE state (base_reachable_time_ms is 30000), preventing lladdr from being updated through probe. Fix it by ensuring timer is started with valid used/confirmed times. Considering the valid time range is LONG_MAX jiffies, we try not to go too much in the past while we are in DELAY/PROBE state. There are also places that need used/updated times to be validated while timer is not running. Reported-by: Zhang Changzhong Signed-off-by: Julian Anastasov Tested-by: Zhang Changzhong Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/core/neighbour.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/net/core/neighbour.c b/net/core/neighbour.c index f6f580e9d282..82ccc3eebe71 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -242,7 +242,7 @@ static int neigh_forced_gc(struct neigh_table *tbl) (n->nud_state == NUD_NOARP) || (tbl->is_multicast && tbl->is_multicast(n->primary_key)) || - time_after(tref, n->updated)) + !time_in_range(n->updated, tref, jiffies)) remove = true; write_unlock(&n->lock); @@ -262,7 +262,17 @@ static int neigh_forced_gc(struct neigh_table *tbl) static void neigh_add_timer(struct neighbour *n, unsigned long when) { + /* Use safe distance from the jiffies - LONG_MAX point while timer + * is running in DELAY/PROBE state but still show to user space + * large times in the past. + */ + unsigned long mint = jiffies - (LONG_MAX - 86400 * HZ); + neigh_hold(n); + if (!time_in_range(n->confirmed, mint, jiffies)) + n->confirmed = mint; + if (time_before(n->used, n->confirmed)) + n->used = n->confirmed; if (unlikely(mod_timer(&n->timer, when))) { printk("NEIGH: BUG, double timer add, state is %x\n", n->nud_state); @@ -948,12 +958,14 @@ static void neigh_periodic_work(struct work_struct *work) goto next_elt; } - if (time_before(n->used, n->confirmed)) + if (time_before(n->used, n->confirmed) && + time_is_before_eq_jiffies(n->confirmed)) n->used = n->confirmed; if (refcount_read(&n->refcnt) == 1 && (state == NUD_FAILED || - time_after(jiffies, n->used + NEIGH_VAR(n->parms, GC_STALETIME)))) { + !time_in_range_open(jiffies, n->used, + n->used + NEIGH_VAR(n->parms, GC_STALETIME)))) { *np = n->next; neigh_mark_dead(n); write_unlock(&n->lock); From 75fbe1e43505f3474d6f590314671e0e53a2afa7 Mon Sep 17 00:00:00 2001 From: Xin Zhao Date: Mon, 30 Jan 2023 21:29:47 +0000 Subject: [PATCH 08/21] HID: core: Fix deadloop in hid_apply_multiplier. [ Upstream commit ea427a222d8bdf2bc1a8a6da3ebe247f7dced70c ] The initial value of hid->collection[].parent_idx if 0. When Report descriptor doesn't contain "HID Collection", the value remains as 0. In the meanwhile, when the Report descriptor fullfill all following conditions, it will trigger hid_apply_multiplier function call. 1. Usage page is Generic Desktop Ctrls (0x01) 2. Usage is RESOLUTION_MULTIPLIER (0x48) 3. Contain any FEATURE items The while loop in hid_apply_multiplier will search the top-most collection by searching parent_idx == -1. Because all parent_idx is 0. The loop will run forever. There is a Report Descriptor triggerring the deadloop 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) 0x09, 0x48, // Usage (0x48) 0x95, 0x01, // Report Count (1) 0x75, 0x08, // Report Size (8) 0xB1, 0x01, // Feature Signed-off-by: Xin Zhao Link: https://lore.kernel.org/r/20230130212947.1315941-1-xnzhao@google.com Signed-off-by: Benjamin Tissoires Signed-off-by: Sasha Levin --- drivers/hid/hid-core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index baadead947c8..5f9ec1d1464a 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -1197,6 +1197,7 @@ int hid_open_report(struct hid_device *device) __u8 *end; __u8 *next; int ret; + int i; static int (*dispatch_type[])(struct hid_parser *parser, struct hid_item *item) = { hid_parser_main, @@ -1247,6 +1248,8 @@ int hid_open_report(struct hid_device *device) goto err; } device->collection_size = HID_DEFAULT_NUM_COLLECTIONS; + for (i = 0; i < HID_DEFAULT_NUM_COLLECTIONS; i++) + device->collection[i].parent_idx = -1; ret = -EINVAL; while ((next = fetch_item(start, end, &item)) != NULL) { From a2957adbf3f5450f7425c545863da4a3287e06a1 Mon Sep 17 00:00:00 2001 From: Martin KaFai Lau Date: Thu, 16 Feb 2023 16:41:48 -0800 Subject: [PATCH 09/21] bpf: bpf_fib_lookup should not return neigh in NUD_FAILED state commit 1fe4850b34ab512ff911e2c035c75fb6438f7307 upstream. The bpf_fib_lookup() helper does not only look up the fib (ie. route) but it also looks up the neigh. Before returning the neigh, the helper does not check for NUD_VALID. When a neigh state (neigh->nud_state) is in NUD_FAILED, its dmac (neigh->ha) could be all zeros. The helper still returns SUCCESS instead of NO_NEIGH in this case. Because of the SUCCESS return value, the bpf prog directly uses the returned dmac and ends up filling all zero in the eth header. This patch checks for NUD_VALID and returns NO_NEIGH if the neigh is not valid. Signed-off-by: Martin KaFai Lau Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20230217004150.2980689-3-martin.lau@linux.dev Signed-off-by: Greg Kroah-Hartman --- net/core/filter.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/core/filter.c b/net/core/filter.c index a5df0cf46bbf..b9c954182b37 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -5401,7 +5401,7 @@ static int bpf_ipv4_fib_lookup(struct net *net, struct bpf_fib_lookup *params, neigh = __ipv6_neigh_lookup_noref_stub(dev, dst); } - if (!neigh) + if (!neigh || !(neigh->nud_state & NUD_VALID)) return BPF_FIB_LKUP_RET_NO_NEIGH; return bpf_fib_set_fwd_params(params, neigh, dev); @@ -5514,7 +5514,7 @@ static int bpf_ipv6_fib_lookup(struct net *net, struct bpf_fib_lookup *params, * not needed here. */ neigh = __ipv6_neigh_lookup_noref_stub(dev, dst); - if (!neigh) + if (!neigh || !(neigh->nud_state & NUD_VALID)) return BPF_FIB_LKUP_RET_NO_NEIGH; return bpf_fib_set_fwd_params(params, neigh, dev); From 3e4bbd1f38a8d35bd2d3aaffdb5f6ada546b669a Mon Sep 17 00:00:00 2001 From: Kuniyuki Iwashima Date: Thu, 9 Feb 2023 16:22:02 -0800 Subject: [PATCH 10/21] net: Remove WARN_ON_ONCE(sk->sk_forward_alloc) from sk_stream_kill_queues(). commit 62ec33b44e0f7168ff2886520fec6fb62d03b5a3 upstream. Christoph Paasch reported that commit b5fc29233d28 ("inet6: Remove inet6_destroy_sock() in sk->sk_prot->destroy().") started triggering WARN_ON_ONCE(sk->sk_forward_alloc) in sk_stream_kill_queues(). [0 - 2] Also, we can reproduce it by a program in [3]. In the commit, we delay freeing ipv6_pinfo.pktoptions from sk->destroy() to sk->sk_destruct(), so sk->sk_forward_alloc is no longer zero in inet_csk_destroy_sock(). The same check has been in inet_sock_destruct() from at least v2.6, we can just remove the WARN_ON_ONCE(). However, among the users of sk_stream_kill_queues(), only CAIF is not calling inet_sock_destruct(). Thus, we add the same WARN_ON_ONCE() to caif_sock_destructor(). [0]: https://lore.kernel.org/netdev/39725AB4-88F1-41B3-B07F-949C5CAEFF4F@icloud.com/ [1]: https://github.com/multipath-tcp/mptcp_net-next/issues/341 [2]: WARNING: CPU: 0 PID: 3232 at net/core/stream.c:212 sk_stream_kill_queues+0x2f9/0x3e0 Modules linked in: CPU: 0 PID: 3232 Comm: syz-executor.0 Not tainted 6.2.0-rc5ab24eb4698afbe147b424149c529e2a43ec24eb5 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:sk_stream_kill_queues+0x2f9/0x3e0 Code: 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e ec 00 00 00 8b ab 08 01 00 00 e9 60 ff ff ff e8 d0 5f b6 fe 0f 0b eb 97 e8 c7 5f b6 fe <0f> 0b eb a0 e8 be 5f b6 fe 0f 0b e9 6a fe ff ff e8 02 07 e3 fe e9 RSP: 0018:ffff88810570fc68 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888101f38f40 RSI: ffffffff8285e529 RDI: 0000000000000005 RBP: 0000000000000ce0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000ce0 R11: 0000000000000001 R12: ffff8881009e9488 R13: ffffffff84af2cc0 R14: 0000000000000000 R15: ffff8881009e9458 FS: 00007f7fdfbd5800(0000) GS:ffff88811b600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32923000 CR3: 00000001062fc006 CR4: 0000000000170ef0 Call Trace: inet_csk_destroy_sock+0x1a1/0x320 __tcp_close+0xab6/0xe90 tcp_close+0x30/0xc0 inet_release+0xe9/0x1f0 inet6_release+0x4c/0x70 __sock_release+0xd2/0x280 sock_close+0x15/0x20 __fput+0x252/0xa20 task_work_run+0x169/0x250 exit_to_user_mode_prepare+0x113/0x120 syscall_exit_to_user_mode+0x1d/0x40 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f7fdf7ae28d Code: c1 20 00 00 75 10 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ee fb ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 37 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00000000007dfbb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f7fdf7ae28d RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 0000000000000000 R08: 000000007f338e0f R09: 0000000000000e0f R10: 000000007f338e13 R11: 0000000000000293 R12: 00007f7fdefff000 R13: 00007f7fdefffcd8 R14: 00007f7fdefffce0 R15: 00007f7fdefffcd8 [3]: https://lore.kernel.org/netdev/20230208004245.83497-1-kuniyu@amazon.com/ Fixes: b5fc29233d28 ("inet6: Remove inet6_destroy_sock() in sk->sk_prot->destroy().") Reported-by: syzbot Reported-by: Christoph Paasch Signed-off-by: Kuniyuki Iwashima Reviewed-by: Eric Dumazet Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- net/caif/caif_socket.c | 1 + net/core/stream.c | 1 - 2 files changed, 1 insertion(+), 1 deletion(-) diff --git a/net/caif/caif_socket.c b/net/caif/caif_socket.c index 9d26c5e9da05..d35ea927ca8a 100644 --- a/net/caif/caif_socket.c +++ b/net/caif/caif_socket.c @@ -1020,6 +1020,7 @@ static void caif_sock_destructor(struct sock *sk) return; } sk_stream_kill_queues(&cf_sk->sk); + WARN_ON(sk->sk_forward_alloc); caif_free_client(&cf_sk->layer); } diff --git a/net/core/stream.c b/net/core/stream.c index d7c5413d16d5..cd60746877b1 100644 --- a/net/core/stream.c +++ b/net/core/stream.c @@ -209,7 +209,6 @@ void sk_stream_kill_queues(struct sock *sk) sk_mem_reclaim(sk); WARN_ON(sk->sk_wmem_queued); - WARN_ON(sk->sk_forward_alloc); /* It is _impossible_ for the backlog to contain anything * when we get here. All user references to this socket From 80653a6e6e287eb982be9aa9f60f94382b6767b5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Mon, 20 Feb 2023 06:46:12 +0000 Subject: [PATCH 11/21] vc_screen: don't clobber return value in vcs_read MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit ae3419fbac845b4d3f3a9fae4cc80c68d82cdf6e upstream. Commit 226fae124b2d ("vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAF") moved the call to vcs_vc() into the loop. While doing this it also moved the unconditional assignment of ret = -ENXIO; This unconditional assignment was valid outside the loop but within it it clobbers the actual value of ret. To avoid this only assign "ret = -ENXIO" when actually needed. [ Also, the 'goto unlock_out" needs to be just a "break", so that it does the right thing when it exits on later iterations when partial success has happened - Linus ] Reported-by: Storm Dragon Link: https://lore.kernel.org/lkml/Y%2FKS6vdql2pIsCiI@hotmail.com/ Fixes: 226fae124b2d ("vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAF") Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/lkml/64981d94-d00c-4b31-9063-43ad0a384bde@t-8ch.de/ Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vc_screen.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c index f566eb1839dc..71e091f879f0 100644 --- a/drivers/tty/vt/vc_screen.c +++ b/drivers/tty/vt/vc_screen.c @@ -403,10 +403,11 @@ vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) unsigned int this_round, skip = 0; int size; - ret = -ENXIO; vc = vcs_vc(inode, &viewed); - if (!vc) - goto unlock_out; + if (!vc) { + ret = -ENXIO; + break; + } /* Check whether we are above size each round, * as copy_to_user at the end of this loop From 1c44109c30946e4e8dfad785bb006fafad9b3caf Mon Sep 17 00:00:00 2001 From: David Sloan Date: Thu, 11 Aug 2022 11:14:13 -0600 Subject: [PATCH 12/21] md: Flush workqueue md_rdev_misc_wq in md_alloc() commit 5e8daf906f890560df430d30617c692a794acb73 upstream. A race condition still exists when removing and re-creating md devices in test cases. However, it is only seen on some setups. The race condition was tracked down to a reference still being held to the kobject by the rdev in the md_rdev_misc_wq which will be released in rdev_delayed_delete(). md_alloc() waits for previous deletions by waiting on the md_misc_wq, but the md_rdev_misc_wq may still be holding a reference to a recently removed device. To fix this, also flush the md_rdev_misc_wq in md_alloc(). Signed-off-by: David Sloan [logang@deltatee.com: rewrote commit message] Signed-off-by: Logan Gunthorpe Signed-off-by: Song Liu Signed-off-by: Hou Tao Signed-off-by: Greg Kroah-Hartman --- drivers/md/md.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index 3038e7ecb7e1..c0b34637bd66 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5683,6 +5683,7 @@ static int md_alloc(dev_t dev, char *name) * completely removed (mddev_delayed_delete). */ flush_workqueue(md_misc_wq); + flush_workqueue(md_rdev_misc_wq); mutex_lock(&disks_mutex); error = -EEXIST; From 65c07e15f2ce7f9e2cf68ea02bd2631cca53594e Mon Sep 17 00:00:00 2001 From: Cristian Ciocaltea Date: Tue, 17 May 2022 02:46:46 +0300 Subject: [PATCH 13/21] scripts/tags.sh: Invoke 'realpath' via 'xargs' commit 7394d2ebb651a9f62e08c6ab864aac015d27c64d upstream. When COMPILED_SOURCE is set, running make ARCH=x86_64 COMPILED_SOURCE=1 cscope tags could throw the following errors: scripts/tags.sh: line 98: /usr/bin/realpath: Argument list too long cscope: no source files found scripts/tags.sh: line 98: /usr/bin/realpath: Argument list too long ctags: No files specified. Try "ctags --help". This is most likely to happen when the kernel is configured to build a large number of modules, which has the consequence of passing too many arguments when calling 'realpath' in 'all_compiled_sources()'. Let's improve this by invoking 'realpath' through 'xargs', which takes care of properly limiting the argument list. Signed-off-by: Cristian Ciocaltea Link: https://lore.kernel.org/r/20220516234646.531208-1-cristian.ciocaltea@collabora.com Cc: Carlos Llamas Signed-off-by: Greg Kroah-Hartman --- scripts/tags.sh | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/scripts/tags.sh b/scripts/tags.sh index fd96734deff1..c15f3b4ea2a4 100755 --- a/scripts/tags.sh +++ b/scripts/tags.sh @@ -95,10 +95,13 @@ all_sources() all_compiled_sources() { - realpath -es $([ -z "$KBUILD_ABS_SRCTREE" ] && echo --relative-to=.) \ - include/generated/autoconf.h $(find $ignore -name "*.cmd" -exec \ - grep -Poh '(?(?=^source_.* \K).*|(?=^ \K\S).*(?= \\))' {} \+ | - awk '!a[$0]++') | sort -u + { + echo include/generated/autoconf.h + find $ignore -name "*.cmd" -exec \ + grep -Poh '(?(?=^source_.* \K).*|(?=^ \K\S).*(?= \\))' {} \+ | + awk '!a[$0]++' + } | xargs realpath -es $([ -z "$KBUILD_ABS_SRCTREE" ] && echo --relative-to=.) | + sort -u } all_target_sources() From a401ef0557da5b7f5b9c4baf0d861b33883d9228 Mon Sep 17 00:00:00 2001 From: Carlos Llamas Date: Wed, 15 Feb 2023 18:38:50 +0000 Subject: [PATCH 14/21] scripts/tags.sh: fix incompatibility with PCRE2 commit 6ec363fc6142226b9ab5a6528f65333d729d2b6b upstream. Starting with release 10.38 PCRE2 drops default support for using \K in lookaround patterns as described in [1]. Unfortunately, scripts/tags.sh relies on such functionality to collect all_compiled_soures() leading to the following error: $ make COMPILED_SOURCE=1 tags GEN tags grep: \K is not allowed in lookarounds (but see PCRE2_EXTRA_ALLOW_LOOKAROUND_BSK) The usage of \K for this pattern was introduced in commit 4f491bb6ea2a ("scripts/tags.sh: collect compiled source precisely") which speeds up the generation of tags significantly. In order to fix this issue without compromising the performance we can switch over to an equivalent sed expression. The same matching pattern is preserved here except \K is replaced with a backreference \1. [1] https://www.pcre.org/current/doc/html/pcre2syntax.html#SEC11 Cc: Greg Kroah-Hartman Cc: Cristian Ciocaltea Cc: Masahiro Yamada Cc: Jialu Xu Cc: Vipin Sharma Cc: stable@vger.kernel.org Fixes: 4f491bb6ea2a ("scripts/tags.sh: collect compiled source precisely") Signed-off-by: Carlos Llamas Link: https://lore.kernel.org/r/20230215183850.3353198-1-cmllamas@google.com Signed-off-by: Greg Kroah-Hartman --- scripts/tags.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scripts/tags.sh b/scripts/tags.sh index c15f3b4ea2a4..b82aebb0c995 100755 --- a/scripts/tags.sh +++ b/scripts/tags.sh @@ -98,7 +98,7 @@ all_compiled_sources() { echo include/generated/autoconf.h find $ignore -name "*.cmd" -exec \ - grep -Poh '(?(?=^source_.* \K).*|(?=^ \K\S).*(?= \\))' {} \+ | + sed -n -E 's/^source_.* (.*)/\1/p; s/^ (\S.*) \\/\1/p' {} \+ | awk '!a[$0]++' } | xargs realpath -es $([ -z "$KBUILD_ABS_SRCTREE" ] && echo --relative-to=.) | sort -u From 0a4181b23acf53e9c95b351df6a7891116b98f9b Mon Sep 17 00:00:00 2001 From: Miaoqian Lin Date: Thu, 2 Jun 2022 14:42:22 +0400 Subject: [PATCH 15/21] drm/virtio: Fix NULL vs IS_ERR checking in virtio_gpu_object_shmem_init commit c24968734abfed81c8f93dc5f44a7b7a9aecadfa upstream. Since drm_prime_pages_to_sg() function return error pointers. The drm_gem_shmem_get_sg_table() function returns error pointers too. Using IS_ERR() to check the return value to fix this. Fixes: 2f2aa13724d5 ("drm/virtio: move virtio_gpu_mem_entry initialization to new function") Signed-off-by: Miaoqian Lin Link: http://patchwork.freedesktop.org/patch/msgid/20220602104223.54527-1-linmq006@gmail.com Signed-off-by: Gerd Hoffmann Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ovidiu Panait --- drivers/gpu/drm/virtio/virtgpu_object.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c index 0c98978e2e55..d4fab3361d2c 100644 --- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -157,9 +157,9 @@ static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev, * since virtio_gpu doesn't support dma-buf import from other devices. */ shmem->pages = drm_gem_shmem_get_sg_table(&bo->base.base); - if (!shmem->pages) { + if (IS_ERR(shmem->pages)) { drm_gem_shmem_unpin(&bo->base.base); - return -EINVAL; + return PTR_ERR(shmem->pages); } if (use_dma_api) { From 87c647def389354c95263d6635c62ca0de7d12ca Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Thu, 30 Jun 2022 23:07:18 +0300 Subject: [PATCH 16/21] drm/virtio: Correct drm_gem_shmem_get_sg_table() error handling commit 64b88afbd92fbf434759d1896a7cf705e1c00e79 upstream. Previous commit fixed checking of the ERR_PTR value returned by drm_gem_shmem_get_sg_table(), but it missed to zero out the shmem->pages, which will crash virtio_gpu_cleanup_object(). Add the missing zeroing of the shmem->pages. Fixes: c24968734abf ("drm/virtio: Fix NULL vs IS_ERR checking in virtio_gpu_object_shmem_init") Reviewed-by: Emil Velikov Signed-off-by: Dmitry Osipenko Link: http://patchwork.freedesktop.org/patch/msgid/20220630200726.1884320-2-dmitry.osipenko@collabora.com Signed-off-by: Gerd Hoffmann Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ovidiu Panait --- drivers/gpu/drm/virtio/virtgpu_object.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c index d4fab3361d2c..168148686001 100644 --- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -159,6 +159,7 @@ static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev, shmem->pages = drm_gem_shmem_get_sg_table(&bo->base.base); if (IS_ERR(shmem->pages)) { drm_gem_shmem_unpin(&bo->base.base); + shmem->pages = NULL; return PTR_ERR(shmem->pages); } From cebcd4300af9074e0e831090ca6c1b3154ef942a Mon Sep 17 00:00:00 2001 From: Florian Zumbiehl Date: Mon, 6 Feb 2023 02:04:28 +0100 Subject: [PATCH 17/21] USB: serial: option: add support for VW/Skoda "Carstick LTE" commit 617c331d91077f896111044628c096802551dc66 upstream. Add support for VW/Skoda "Carstick LTE" D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=1c9e ProdID=7605 Rev=02.00 S: Manufacturer=USB Modem S: Product=USB Modem C: #Ifs= 4 Cfg#= 1 Atr=e0 MxPwr=500mA I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) I: If#=0x1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) I: If#=0x2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) I: If#=0x3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) The stick has AT command interfaces on interfaces 1, 2, and 3, and does PPP on interface 3. Signed-off-by: Florian Zumbiehl Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/option.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c index 2fc65cbbfea9..14a7af7f3bcd 100644 --- a/drivers/usb/serial/option.c +++ b/drivers/usb/serial/option.c @@ -402,6 +402,8 @@ static void option_instat_callback(struct urb *urb); #define LONGCHEER_VENDOR_ID 0x1c9e /* 4G Systems products */ +/* This one was sold as the VW and Skoda "Carstick LTE" */ +#define FOUR_G_SYSTEMS_PRODUCT_CARSTICK_LTE 0x7605 /* This is the 4G XS Stick W14 a.k.a. Mobilcom Debitel Surf-Stick * * It seems to contain a Qualcomm QSC6240/6290 chipset */ #define FOUR_G_SYSTEMS_PRODUCT_W14 0x9603 @@ -1976,6 +1978,8 @@ static const struct usb_device_id option_ids[] = { .driver_info = RSVD(2) }, { USB_DEVICE(AIRPLUS_VENDOR_ID, AIRPLUS_PRODUCT_MCD650) }, { USB_DEVICE(TLAYTECH_VENDOR_ID, TLAYTECH_PRODUCT_TEU800) }, + { USB_DEVICE(LONGCHEER_VENDOR_ID, FOUR_G_SYSTEMS_PRODUCT_CARSTICK_LTE), + .driver_info = RSVD(0) }, { USB_DEVICE(LONGCHEER_VENDOR_ID, FOUR_G_SYSTEMS_PRODUCT_W14), .driver_info = NCTRL(0) | NCTRL(1) }, { USB_DEVICE(LONGCHEER_VENDOR_ID, FOUR_G_SYSTEMS_PRODUCT_W100), From c5360eec648bd506afa304ae4a71f82e13d41897 Mon Sep 17 00:00:00 2001 From: Prashanth K Date: Mon, 13 Feb 2023 23:00:38 +0530 Subject: [PATCH 18/21] usb: gadget: u_serial: Add null pointer check in gserial_resume commit 5ec63fdbca604568890c577753c6f66c5b3ef0b5 upstream. Consider a case where gserial_disconnect has already cleared gser->ioport. And if a wakeup interrupt triggers afterwards, gserial_resume gets called, which will lead to accessing of gser->ioport and thus causing null pointer dereference.Add a null pointer check to prevent this. Added a static spinlock to prevent gser->ioport from becoming null after the newly added check. Fixes: aba3a8d01d62 ("usb: gadget: u_serial: add suspend resume callbacks") Cc: stable Signed-off-by: Prashanth K Acked-by: Alan Stern Link: https://lore.kernel.org/r/1676309438-14922-1-git-send-email-quic_prashk@quicinc.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/function/u_serial.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c index 2caccbb6e014..7b54e814aefb 100644 --- a/drivers/usb/gadget/function/u_serial.c +++ b/drivers/usb/gadget/function/u_serial.c @@ -81,6 +81,9 @@ #define WRITE_BUF_SIZE 8192 /* TX only */ #define GS_CONSOLE_BUF_SIZE 8192 +/* Prevents race conditions while accessing gser->ioport */ +static DEFINE_SPINLOCK(serial_port_lock); + /* console info */ struct gs_console { struct console console; @@ -1376,8 +1379,10 @@ void gserial_disconnect(struct gserial *gser) if (!port) return; + spin_lock_irqsave(&serial_port_lock, flags); + /* tell the TTY glue not to do I/O here any more */ - spin_lock_irqsave(&port->port_lock, flags); + spin_lock(&port->port_lock); gs_console_disconnect(port); @@ -1392,7 +1397,8 @@ void gserial_disconnect(struct gserial *gser) tty_hangup(port->port.tty); } port->suspended = false; - spin_unlock_irqrestore(&port->port_lock, flags); + spin_unlock(&port->port_lock); + spin_unlock_irqrestore(&serial_port_lock, flags); /* disable endpoints, aborting down any active I/O */ usb_ep_disable(gser->out); @@ -1426,10 +1432,19 @@ EXPORT_SYMBOL_GPL(gserial_suspend); void gserial_resume(struct gserial *gser) { - struct gs_port *port = gser->ioport; + struct gs_port *port; unsigned long flags; - spin_lock_irqsave(&port->port_lock, flags); + spin_lock_irqsave(&serial_port_lock, flags); + port = gser->ioport; + + if (!port) { + spin_unlock_irqrestore(&serial_port_lock, flags); + return; + } + + spin_lock(&port->port_lock); + spin_unlock(&serial_port_lock); port->suspended = false; if (!port->start_delayed) { spin_unlock_irqrestore(&port->port_lock, flags); From 218925bfd5d1436e337c4f961e9c149fbe32de6d Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Tue, 31 Jan 2023 15:49:04 -0500 Subject: [PATCH 19/21] USB: core: Don't hold device lock while reading the "descriptors" sysfs file commit 45bf39f8df7f05efb83b302c65ae3b9bc92b7065 upstream. Ever since commit 83e83ecb79a8 ("usb: core: get config and string descriptors for unauthorized devices") was merged in 2013, there has been no mechanism for reallocating the rawdescriptors buffers in struct usb_device after the initial enumeration. Before that commit, the buffers would be deallocated when a device was deauthorized and reallocated when it was authorized and enumerated. This means that the locking in the read_descriptors() routine is not needed, since the buffers it reads will never be reallocated while the routine is running. This locking can interfere with user programs trying to read a hub's descriptors via sysfs while new child devices of the hub are being initialized, since the hub is locked during this procedure. Since the locking in read_descriptors() hasn't been needed for over nine years, we can remove it. Reported-and-tested-by: Troels Liebe Bentsen Signed-off-by: Alan Stern CC: stable@vger.kernel.org Link: https://lore.kernel.org/r/Y9l+wDTRbuZABzsE@rowland.harvard.edu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 5 ++--- drivers/usb/core/sysfs.c | 5 ----- 2 files changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 5925b8eb9ee3..7af2def631a2 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -2380,9 +2380,8 @@ static int usb_enumerate_device_otg(struct usb_device *udev) * usb_enumerate_device - Read device configs/intfs/otg (usbcore-internal) * @udev: newly addressed device (in ADDRESS state) * - * This is only called by usb_new_device() and usb_authorize_device() - * and FIXME -- all comments that apply to them apply here wrt to - * environment. + * This is only called by usb_new_device() -- all comments that apply there + * apply here wrt to environment. * * If the device is WUSB and not authorized, we don't attempt to read * the string descriptors, as they will be errored out by the device diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index 8d134193fa0c..a2ca38e25e0c 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -889,11 +889,7 @@ read_descriptors(struct file *filp, struct kobject *kobj, size_t srclen, n; int cfgno; void *src; - int retval; - retval = usb_lock_device_interruptible(udev); - if (retval < 0) - return -EINTR; /* The binary attribute begins with the device descriptor. * Following that are the raw descriptor entries for all the * configurations (config plus subsidiary descriptors). @@ -918,7 +914,6 @@ read_descriptors(struct file *filp, struct kobject *kobj, off -= srclen; } } - usb_unlock_device(udev); return count - nleft; } From 08681391b84da27133deefaaddefd0acfa90c2be Mon Sep 17 00:00:00 2001 From: Bing-Jhong Billy Jheng Date: Thu, 2 Mar 2023 21:00:06 +0800 Subject: [PATCH 20/21] io_uring: add missing lock in io_get_file_fixed io_get_file_fixed will access io_uring's context. Lock it if it is invoked unlocked (eg via io-wq) to avoid a race condition with fixed files getting unregistered. No single upstream patch exists for this issue, it was fixed as part of the file assignment changes that went into the 5.18 cycle. Signed-off-by: Jheng, Bing-Jhong Billy Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- io_uring/io_uring.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 642e1a0560c6..0c27b81ee1eb 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -1092,7 +1092,8 @@ static int __io_register_rsrc_update(struct io_ring_ctx *ctx, unsigned type, unsigned nr_args); static void io_clean_op(struct io_kiocb *req); static struct file *io_file_get(struct io_ring_ctx *ctx, - struct io_kiocb *req, int fd, bool fixed); + struct io_kiocb *req, int fd, bool fixed, + unsigned int issue_flags); static void __io_queue_sqe(struct io_kiocb *req); static void io_rsrc_put_work(struct work_struct *work); @@ -3975,7 +3976,7 @@ static int io_tee(struct io_kiocb *req, unsigned int issue_flags) return -EAGAIN; in = io_file_get(req->ctx, req, sp->splice_fd_in, - (sp->flags & SPLICE_F_FD_IN_FIXED)); + (sp->flags & SPLICE_F_FD_IN_FIXED), issue_flags); if (!in) { ret = -EBADF; goto done; @@ -4015,7 +4016,7 @@ static int io_splice(struct io_kiocb *req, unsigned int issue_flags) return -EAGAIN; in = io_file_get(req->ctx, req, sp->splice_fd_in, - (sp->flags & SPLICE_F_FD_IN_FIXED)); + (sp->flags & SPLICE_F_FD_IN_FIXED), issue_flags); if (!in) { ret = -EBADF; goto done; @@ -6876,13 +6877,16 @@ static void io_fixed_file_set(struct io_fixed_file *file_slot, struct file *file } static inline struct file *io_file_get_fixed(struct io_ring_ctx *ctx, - struct io_kiocb *req, int fd) + struct io_kiocb *req, int fd, + unsigned int issue_flags) { - struct file *file; + struct file *file = NULL; unsigned long file_ptr; + io_ring_submit_lock(ctx, !(issue_flags & IO_URING_F_NONBLOCK)); + if (unlikely((unsigned int)fd >= ctx->nr_user_files)) - return NULL; + goto out; fd = array_index_nospec(fd, ctx->nr_user_files); file_ptr = io_fixed_file_slot(&ctx->file_table, fd)->file_ptr; file = (struct file *) (file_ptr & FFS_MASK); @@ -6890,6 +6894,8 @@ static inline struct file *io_file_get_fixed(struct io_ring_ctx *ctx, /* mask in overlapping REQ_F and FFS bits */ req->flags |= (file_ptr << REQ_F_NOWAIT_READ_BIT); io_req_set_rsrc_node(req); +out: + io_ring_submit_unlock(ctx, !(issue_flags & IO_URING_F_NONBLOCK)); return file; } @@ -6907,10 +6913,11 @@ static struct file *io_file_get_normal(struct io_ring_ctx *ctx, } static inline struct file *io_file_get(struct io_ring_ctx *ctx, - struct io_kiocb *req, int fd, bool fixed) + struct io_kiocb *req, int fd, bool fixed, + unsigned int issue_flags) { if (fixed) - return io_file_get_fixed(ctx, req, fd); + return io_file_get_fixed(ctx, req, fd, issue_flags); else return io_file_get_normal(ctx, req, fd); } @@ -7132,7 +7139,7 @@ static int io_init_req(struct io_ring_ctx *ctx, struct io_kiocb *req, if (io_op_defs[req->opcode].needs_file) { req->file = io_file_get(ctx, req, READ_ONCE(sqe->fd), - (sqe_flags & IOSQE_FIXED_FILE)); + (sqe_flags & IOSQE_FIXED_FILE), 0); if (unlikely(!req->file)) ret = -EBADF; } From a25aa776b0c49b17c67ee047e58537552f16776f Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Fri, 3 Mar 2023 11:44:52 +0100 Subject: [PATCH 21/21] Linux 5.10.171 Link: https://lore.kernel.org/r/20230301180652.316428563@linuxfoundation.org Tested-by: Florian Fainelli Tested-by: Slade Watkins Tested-by: Pavel Machek (CIP) Tested-by: Shuah Khan Tested-by: Jon Hunter Tested-by: Sudip Mukherjee Tested-by: Salvatore Bonaccorso Tested-by: Linux Kernel Functional Testing Tested-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 028fca7ec5cf..9dde2c230789 100644 --- a/Makefile +++ b/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 VERSION = 5 PATCHLEVEL = 10 -SUBLEVEL = 170 +SUBLEVEL = 171 EXTRAVERSION = NAME = Dare mighty things