Todd Poynor 0a9dea2817 ashmem: avoid deadlock between read and mmap calls ...

Avoid holding ashmem_mutex across code that can page fault.  Page faults
grab the mmap_sem for the process, which are also held by mmap calls
prior to calling ashmem_mmap, which locks ashmem_mutex.  The reversed
order of locking between the two can deadlock.

The calls that can page fault are read() and the ASHMEM_SET_NAME and
ASHMEM_GET_NAME ioctls.  Move the code that accesses userspace pages
outside the ashmem_mutex.

Bug: 9261835
Change-Id: If1322e981d29c889a56cdc9dfcbc6df2729a45e9
Signed-off-by: Todd Poynor <toddpoynor@google.com>

Conflicts:
	drivers/staging/android/ashmem.c

2013-07-01 14:16:27 -07:00

..

trace

staging: sync: Add tracepoint support

2013-03-04 17:46:55 +08:00

alarm-dev.c

staging: alarm-dev: information leak in alarm_compat_ioctl()

2013-06-04 10:26:14 -07:00

android_alarm.h

staging: alarm-dev: Implement compat_ioctl support

2013-01-18 12:37:11 -08:00

ashmem.c

ashmem: avoid deadlock between read and mmap calls

2013-07-01 14:16:27 -07:00

ashmem.h

staging: android: ashmem: Add support for 32bit ashmem calls in a 64bit kernel

2013-03-06 08:49:43 +08:00

binder_trace.h

Staging: android: binder: Add some tracepoints

2012-10-22 13:04:29 -07:00

binder.c

Add security hooks to binder and implement the hooks for SELinux.

2013-07-01 14:16:21 -07:00

binder.h

staging: android: binder: replace IOCTL types with user-exportable types

2013-04-11 08:51:51 -07:00

Kconfig

staging: android: lowmemorykiller: Add config option to support oom_adj values

2013-07-01 14:16:08 -07:00

logger.c

staging: android: logger: use kuid_t instead of uid_t

2013-05-16 15:37:51 -07:00

logger.h

staging: android: logger: use kuid_t instead of uid_t

2013-05-16 15:37:51 -07:00

lowmemorykiller.c

lowmemorykiller: make default lowmemorykiller debug message useful

2013-07-01 14:16:25 -07:00

Makefile

staging: sw_sync: Add cpu based sync driver

2013-03-04 17:40:08 +08:00

ram_console.h

…

sw_sync.c

staging: sync: Add compat_ioctl handlers to sync drivers

2013-03-29 12:35:28 -07:00

sw_sync.h

staging: sw_sync: Add cpu based sync driver

2013-03-04 17:40:08 +08:00

sync.c

staging: sync: Add compat_ioctl handlers to sync drivers

2013-03-29 12:35:28 -07:00

sync.h

staging: sync: Refactor sync debug printing

2013-03-04 17:46:55 +08:00

timed_gpio.c

…

timed_gpio.h

…

timed_output.c

…

timed_output.h

…