Merge tag 'mm-nonmm-stable-2022-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - A ptrace API cleanup series from Sergey Shtylyov

 - Fixes and cleanups for kexec from ye xingchen

 - nilfs2 updates from Ryusuke Konishi

 - squashfs feature work from Xiaoming Ni: permit configuration of the
   filesystem's compression concurrency from the mount command line

 - A series from Akinobu Mita which addresses bound checking errors when
   writing to debugfs files

 - A series from Yang Yingliang to address rapidio memory leaks

 - A series from Zheng Yejian to address possible overflow errors in
   encode_comp_t()

 - And a whole shower of singleton patches all over the place

* tag 'mm-nonmm-stable-2022-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (79 commits)
  ipc: fix memory leak in init_mqueue_fs()
  hfsplus: fix bug causing custom uid and gid being unable to be assigned with mount
  rapidio: devices: fix missing put_device in mport_cdev_open
  kcov: fix spelling typos in comments
  hfs: Fix OOB Write in hfs_asc2mac
  hfs: fix OOB Read in __hfs_brec_find
  relay: fix type mismatch when allocating memory in relay_create_buf()
  ocfs2: always read both high and low parts of dinode link count
  io-mapping: move some code within the include guarded section
  kernel: kcsan: kcsan_test: build without structleak plugin
  mailmap: update email for Iskren Chernev
  eventfd: change int to __u64 in eventfd_signal() ifndef CONFIG_EVENTFD
  rapidio: fix possible UAF when kfifo_alloc() fails
  relay: use strscpy() is more robust and safer
  cpumask: limit visibility of FORCE_NR_CPUS
  acct: fix potential integer overflow in encode_comp_t()
  acct: fix accuracy loss for input value of encode_comp_t()
  linux/init.h: include <linux/build_bug.h> and <linux/stringify.h>
  rapidio: rio: fix possible name leak in rio_register_mport()
  rapidio: fix possible name leaks when rio_add_device() fails
  ...

.mailmap

@@ -228,6 +228,7 @@ Juha Yrjola <at solidboot.com>
 Juha Yrjola <juha.yrjola@nokia.com>
 Juha Yrjola <juha.yrjola@solidboot.com>
 Julien Thierry <julien.thierry.kdev@gmail.com> <julien.thierry@arm.com>
+Iskren Chernev <me@iskren.info> <iskren.chernev@gmail.com>
 Kalle Valo <kvalo@kernel.org> <kvalo@codeaurora.org>
 Kalyan Thota <quic_kalyant@quicinc.com> <kalyan_t@codeaurora.org>
 Kay Sievers <kay.sievers@vrfy.org>

Documentation/admin-guide/sysctl/kernel.rst

@@ -176,6 +176,7 @@ core_pattern
 	%f      	executable filename
 	%E		executable path
 	%c		maximum size of core file by resource limit RLIMIT_CORE
+	%C		CPU the task ran on
 	%<OTHER>	both are dropped
 	========	==========================================
 

Documentation/fault-injection/fault-injection.rst

@@ -83,9 +83,7 @@ configuration of fault-injection capabilities.
 - /sys/kernel/debug/fail*/times:
 
 	specifies how many times failures may happen at most. A value of -1
-	means "no limit". Note, though, that this file only accepts unsigned
-	values. So, if you want to specify -1, you better use 'printf' instead
-	of 'echo', e.g.: $ printf %#x -1 > times
+	means "no limit".
 
 - /sys/kernel/debug/fail*/space:
 
@@ -284,7 +282,7 @@ Application Examples
     echo Y > /sys/kernel/debug/$FAILTYPE/task-filter
     echo 10 > /sys/kernel/debug/$FAILTYPE/probability
     echo 100 > /sys/kernel/debug/$FAILTYPE/interval
-    printf %#x -1 > /sys/kernel/debug/$FAILTYPE/times
+    echo -1 > /sys/kernel/debug/$FAILTYPE/times
     echo 0 > /sys/kernel/debug/$FAILTYPE/space
     echo 2 > /sys/kernel/debug/$FAILTYPE/verbose
     echo Y > /sys/kernel/debug/$FAILTYPE/ignore-gfp-wait
@@ -338,7 +336,7 @@ Application Examples
     echo N > /sys/kernel/debug/$FAILTYPE/task-filter
     echo 10 > /sys/kernel/debug/$FAILTYPE/probability
     echo 100 > /sys/kernel/debug/$FAILTYPE/interval
-    printf %#x -1 > /sys/kernel/debug/$FAILTYPE/times
+    echo -1 > /sys/kernel/debug/$FAILTYPE/times
     echo 0 > /sys/kernel/debug/$FAILTYPE/space
     echo 2 > /sys/kernel/debug/$FAILTYPE/verbose
     echo Y > /sys/kernel/debug/$FAILTYPE/ignore-gfp-wait
@@ -369,7 +367,7 @@ Application Examples
     echo N > /sys/kernel/debug/$FAILTYPE/task-filter
     echo 100 > /sys/kernel/debug/$FAILTYPE/probability
     echo 0 > /sys/kernel/debug/$FAILTYPE/interval
-    printf %#x -1 > /sys/kernel/debug/$FAILTYPE/times
+    echo -1 > /sys/kernel/debug/$FAILTYPE/times
     echo 0 > /sys/kernel/debug/$FAILTYPE/space
     echo 1 > /sys/kernel/debug/$FAILTYPE/verbose
 

Documentation/filesystems/proc.rst

@@ -47,6 +47,7 @@ fixes/update part 1.1  Stefani Seibold <stefani@seibold.net>    June 9 2009
   3.10  /proc/<pid>/timerslack_ns - Task timerslack value
   3.11	/proc/<pid>/patch_state - Livepatch patch operation state
   3.12	/proc/<pid>/arch_status - Task architecture specific information
+  3.13  /proc/<pid>/fd - List of symlinks to open files
 
   4	Configuring procfs
   4.1	Mount options
@@ -2150,6 +2151,22 @@ AVX512_elapsed_ms
   the task is unlikely an AVX512 user, but depends on the workload and the
   scheduling scenario, it also could be a false negative mentioned above.
 
+3.13 /proc/<pid>/fd - List of symlinks to open files
+-------------------------------------------------------
+This directory contains symbolic links which represent open files
+the process is maintaining.  Example output::
+
+  lr-x------ 1 root root 64 Sep 20 17:53 0 -> /dev/null
+  l-wx------ 1 root root 64 Sep 20 17:53 1 -> /dev/null
+  lrwx------ 1 root root 64 Sep 20 17:53 10 -> 'socket:[12539]'
+  lrwx------ 1 root root 64 Sep 20 17:53 11 -> 'socket:[12540]'
+  lrwx------ 1 root root 64 Sep 20 17:53 12 -> 'socket:[12542]'
+
+The number of open files for the process is stored in 'size' member
+of stat() output for /proc/<pid>/fd for fast access.
+-------------------------------------------------------
+
+
 Chapter 4: Configuring procfs
 =============================
 

MAINTAINERS

@@ -12126,7 +12126,7 @@ M:	Alexey Kodanev <alexey.kodanev@oracle.com>
 L:	ltp@lists.linux.it (subscribers-only)
 S:	Maintained
 W:	http://linux-test-project.github.io/
-T:	git git://github.com/linux-test-project/ltp.git
+T:	git https://github.com/linux-test-project/ltp.git
 
 LYNX 28G SERDES PHY DRIVER
 M:	Ioana Ciornei <ioana.ciornei@nxp.com>

arch/arc/kernel/ptrace.c

@@ -185,7 +185,7 @@ static int genregs_set(struct task_struct *target,
 
 #define REG_IGNORE_ONE(LOC)		\
 	if (!ret)			\
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
 			offsetof(struct user_regs_struct, LOC), \
 			offsetof(struct user_regs_struct, LOC) + 4);
 

arch/arm/kernel/machine_kexec.c

@@ -73,7 +73,7 @@ void machine_kexec_cleanup(struct kimage *image)
 {
 }
 
-void machine_crash_nonpanic_core(void *unused)
+static void machine_crash_nonpanic_core(void *unused)
 {
 	struct pt_regs regs;
 

arch/arm/kernel/ptrace.c

@@ -651,11 +651,9 @@ static int vfp_set(struct task_struct *target,
 	if (ret)
 		return ret;
 
-	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-				user_fpregs_offset + sizeof(new_vfp.fpregs),
-				user_fpscr_offset);
-	if (ret)
-		return ret;
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  user_fpregs_offset + sizeof(new_vfp.fpregs),
+				  user_fpscr_offset);
 
 	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
 				 &new_vfp.fpscr,

arch/arm64/kernel/ptrace.c

@@ -514,9 +514,7 @@ static int hw_break_set(struct task_struct *target,
 
 	/* Resource info and pad */
 	offset = offsetof(struct user_hwdebug_state, dbg_regs);
-	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 0, offset);
-	if (ret)
-		return ret;
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 0, offset);
 
 	/* (address, ctrl) registers */
 	limit = regset->n * regset->size;
@@ -543,11 +541,8 @@ static int hw_break_set(struct task_struct *target,
 			return ret;
 		offset += PTRACE_HBP_CTRL_SZ;
 
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						offset,
-						offset + PTRACE_HBP_PAD_SZ);
-		if (ret)
-			return ret;
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  offset, offset + PTRACE_HBP_PAD_SZ);
 		offset += PTRACE_HBP_PAD_SZ;
 		idx++;
 	}
@@ -955,10 +950,7 @@ static int sve_set_common(struct task_struct *target,
 
 	start = end;
 	end = SVE_PT_SVE_FPSR_OFFSET(vq);
-	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					start, end);
-	if (ret)
-		goto out;
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, start, end);
 
 	/*
 	 * Copy fpsr, and fpcr which must follow contiguously in

arch/hexagon/kernel/ptrace.c

@@ -115,10 +115,9 @@ static int genregs_set(struct task_struct *target,
 
 	/* Ignore the rest, if needed */
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					offsetof(struct user_regs_struct, pad1), -1);
-
-	if (ret)
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+			offsetof(struct user_regs_struct, pad1), -1);
+	else
 		return ret;
 
 	/*

arch/ia64/include/asm/io.h

@@ -23,10 +23,6 @@
 #include <asm/unaligned.h>
 #include <asm/early_ioremap.h>
 
-/* We don't use IO slowdowns on the ia64, but.. */
-#define __SLOW_DOWN_IO	do { } while (0)
-#define SLOW_DOWN_IO	do { } while (0)
-
 #define __IA64_UNCACHED_OFFSET	RGN_BASE(RGN_UNCACHED)
 
 /*

arch/ia64/include/asm/kprobes.h

@@ -110,8 +110,6 @@ extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
 extern int kprobe_exceptions_notify(struct notifier_block *self,
 				    unsigned long val, void *data);
 
-extern void invalidate_stacked_regs(void);
-extern void flush_register_stack(void);
 extern void arch_remove_kprobe(struct kprobe *p);
 
 #endif /* CONFIG_KPROBES */

arch/ia64/kernel/ptrace.c

@@ -1481,12 +1481,10 @@ static void do_gpregs_set(struct unw_frame_info *info, void *arg)
 		return;
 	/* Skip r0 */
 	if (dst->pos < ELF_GR_OFFSET(1)) {
-		dst->ret = user_regset_copyin_ignore(&dst->pos, &dst->count,
-						       &dst->u.set.kbuf,
-						       &dst->u.set.ubuf,
-						       0, ELF_GR_OFFSET(1));
-		if (dst->ret)
-			return;
+		user_regset_copyin_ignore(&dst->pos, &dst->count,
+					  &dst->u.set.kbuf, &dst->u.set.ubuf,
+					  0, ELF_GR_OFFSET(1));
+		dst->ret = 0;
 	}
 
 	while (dst->count && dst->pos < ELF_AR_END_OFFSET) {
@@ -1560,11 +1558,11 @@ static void do_fpregs_set(struct unw_frame_info *info, void *arg)
 
 	/* Skip pos 0 and 1 */
 	if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(2)) {
-		dst->ret = user_regset_copyin_ignore(&dst->pos, &dst->count,
-						       &dst->u.set.kbuf,
-						       &dst->u.set.ubuf,
-						       0, ELF_FP_OFFSET(2));
-		if (dst->count == 0 || dst->ret)
+		user_regset_copyin_ignore(&dst->pos, &dst->count,
+					  &dst->u.set.kbuf, &dst->u.set.ubuf,
+					  0, ELF_FP_OFFSET(2));
+		dst->ret = 0;
+		if (dst->count == 0)
 			return;
 	}
 

arch/ia64/kernel/sys_ia64.c

@@ -140,7 +140,7 @@ asmlinkage unsigned long
 sys_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, long pgoff)
 {
 	addr = ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
-	if (!IS_ERR((void *) addr))
+	if (!IS_ERR_VALUE(addr))
 		force_successful_syscall_return();
 	return addr;
 }
@@ -152,7 +152,7 @@ sys_mmap (unsigned long addr, unsigned long len, int prot, int flags, int fd, lo
 		return -EINVAL;
 
 	addr = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
-	if (!IS_ERR((void *) addr))
+	if (!IS_ERR_VALUE(addr))
 		force_successful_syscall_return();
 	return addr;
 }
@@ -162,7 +162,7 @@ ia64_mremap (unsigned long addr, unsigned long old_len, unsigned long new_len, u
 	     unsigned long new_addr)
 {
 	addr = sys_mremap(addr, old_len, new_len, flags, new_addr);
-	if (!IS_ERR((void *) addr))
+	if (!IS_ERR_VALUE(addr))
 		force_successful_syscall_return();
 	return addr;
 }

arch/mips/kernel/ptrace.c

@@ -531,10 +531,11 @@ static int fpr_set(struct task_struct *target,
 		ptrace_setfcr31(target, fcr31);
 	}
 
-	if (count > 0)
-		err = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						fir_pos,
-						fir_pos + sizeof(u32));
+	if (count > 0) {
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  fir_pos, fir_pos + sizeof(u32));
+		return 0;
+	}
 
 	return err;
 }

arch/nios2/kernel/ptrace.c

@@ -54,7 +54,7 @@ static int genregs_set(struct task_struct *target,
 
 #define REG_IGNORE_RANGE(START, END)		\
 	if (!ret)					\
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
 			START * 4, (END * 4) + 4);
 
 #define REG_IN_ONE(PTR, LOC)	\
@@ -80,8 +80,8 @@ static int genregs_set(struct task_struct *target,
 	REG_IN_ONE(&regs->ra, PTR_RA);
 	REG_IN_ONE(&regs->ea, PTR_PC); /* use ea for PC */
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 PTR_STATUS * 4, -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  PTR_STATUS * 4, -1);
 
 	return ret;
 }

arch/openrisc/kernel/ptrace.c

@@ -66,10 +66,9 @@ static int genregs_set(struct task_struct *target,
 	int ret;
 
 	/* ignore r0 */
-	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 0, 4);
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 0, 4);
 	/* r1 - r31 */
-	if (!ret)
-		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
 					 regs->gpr+1, 4, 4*32);
 	/* PC */
 	if (!ret)
@@ -80,8 +79,7 @@ static int genregs_set(struct task_struct *target,
 	 * the Supervision register
 	 */
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						4*33, -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 4*33, -1);
 
 	return ret;
 }

arch/parisc/kernel/ptrace.c

@@ -424,8 +424,9 @@ static int fpr_set(struct task_struct *target,
 	ubuf = u;
 	pos *= sizeof(reg);
 	count *= sizeof(reg);
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 ELF_NFPREG * sizeof(reg), -1);
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  ELF_NFPREG * sizeof(reg), -1);
+	return 0;
 }
 
 #define RI(reg) (offsetof(struct user_regs_struct,reg) / sizeof(long))
@@ -543,8 +544,9 @@ static int gpr_set(struct task_struct *target,
 	ubuf = u;
 	pos *= sizeof(reg);
 	count *= sizeof(reg);
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 ELF_NGREG * sizeof(reg), -1);
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  ELF_NGREG * sizeof(reg), -1);
+	return 0;
 }
 
 static const struct user_regset native_regsets[] = {
@@ -606,8 +608,9 @@ static int gpr32_set(struct task_struct *target,
 	ubuf = u;
 	pos *= sizeof(reg);
 	count *= sizeof(reg);
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 ELF_NGREG * sizeof(reg), -1);
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  ELF_NGREG * sizeof(reg), -1);
+	return 0;
 }
 
 /*

arch/powerpc/kernel/ptrace/ptrace-tm.c

@@ -170,9 +170,9 @@ int tm_cgpr_set(struct task_struct *target, const struct user_regset *regset,
 					 (PT_MAX_PUT_REG + 1) * sizeof(reg));
 
 	if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						(PT_MAX_PUT_REG + 1) * sizeof(reg),
-						PT_TRAP * sizeof(reg));
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  (PT_MAX_PUT_REG + 1) * sizeof(reg),
+					  PT_TRAP * sizeof(reg));
 
 	if (!ret && count > 0) {
 		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
@@ -183,8 +183,8 @@ int tm_cgpr_set(struct task_struct *target, const struct user_regset *regset,
 	}
 
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						(PT_TRAP + 1) * sizeof(reg), -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  (PT_TRAP + 1) * sizeof(reg), -1);
 
 	return ret;
 }

arch/powerpc/kernel/ptrace/ptrace-view.c

@@ -267,9 +267,9 @@ static int gpr_set(struct task_struct *target, const struct user_regset *regset,
 					 (PT_MAX_PUT_REG + 1) * sizeof(reg));
 
 	if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						(PT_MAX_PUT_REG + 1) * sizeof(reg),
-						PT_TRAP * sizeof(reg));
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  (PT_MAX_PUT_REG + 1) * sizeof(reg),
+					  PT_TRAP * sizeof(reg));
 
 	if (!ret && count > 0) {
 		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
@@ -280,8 +280,8 @@ static int gpr_set(struct task_struct *target, const struct user_regset *regset,
 	}
 
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						(PT_TRAP + 1) * sizeof(reg), -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  (PT_TRAP + 1) * sizeof(reg), -1);
 
 	return ret;
 }
@@ -706,8 +706,9 @@ int gpr32_set_common(struct task_struct *target,
 	ubuf = u;
 	pos *= sizeof(reg);
 	count *= sizeof(reg);
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 (PT_TRAP + 1) * sizeof(reg), -1);
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  (PT_TRAP + 1) * sizeof(reg), -1);
+	return 0;
 
 Efault:
 	user_read_access_end();