diff options
| author |   Viktor Slavkovic <viktors@google.com> | 2018-01-08 10:43:03 -0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-09 15:32:11 +0100 |
| commit | 443064cb0b1fb4569fe0a71209da7625129fb760 (patch) | |
| tree | 677f623bbda77dd2fddb27de05169668d250e0cd /drivers/pps | |
| parent | Linux 4.15-rc6 (diff) | |
| download | linux-dev-443064cb0b1fb4569fe0a71209da7625129fb760.tar.xz linux-dev-443064cb0b1fb4569fe0a71209da7625129fb760.zip | |
staging: android: ashmem: fix a race condition in ASHMEM_SET_SIZE ioctl
A lock-unlock is missing in ASHMEM_SET_SIZE ioctl which can result in a
race condition when mmap is called. After the !asma->file check, before
setting asma->size, asma->file can be set in mmap. That would result in
having different asma->size than the mapped memory size. Combined with
ASHMEM_UNPIN ioctl and shrinker invocation, this can result in memory
corruption.
Signed-off-by: Viktor Slavkovic <viktors@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pps')
0 files changed, 0 insertions, 0 deletions