diff options
| author | Viktor Slavkovic <viktors@google.com> | 2018-01-08 10:43:03 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-17 09:38:56 +0100 |
| commit | c51d23dffc2e9ca05d611c86c440f9055541c62d (patch) | |
| tree | 405a27d25ac6548b386dd056837194e59f49ec83 /drivers/zorro | |
| parent | 8ab8c6e6607a14ebd54319535b17e384d2872df9 (diff) | |
staging: android: ashmem: fix a race condition in ASHMEM_SET_SIZE ioctl
commit 443064cb0b1fb4569fe0a71209da7625129fb760 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/zorro')
0 files changed, 0 insertions, 0 deletions