diff options
| author | Tyler Hicks <tyhicks@canonical.com> | 2012-01-12 11:30:44 +0100 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-02-09 18:19:58 -0800 |
| commit | 59f421c67d1dd3f5f065bff8f2f83088527f2752 (patch) | |
| tree | 53fe42bfbba25feff5f0f28244ac31d50029da47 /fs/fscache | |
| parent | aabe1fc475ab7121bd0d9503a6cd65bad01ebda6 (diff) | |
eCryptfs: Sanitize write counts of /dev/ecryptfs
commit db10e556518eb9d21ee92ff944530d84349684f4 upstream.
A malicious count value specified when writing to /dev/ecryptfs may
result in a a very large kernel memory allocation.
This patch peeks at the specified packet payload size, adds that to the
size of the packet headers and compares the result with the write count
value. The resulting maximum memory allocation size is approximately 532
bytes.
Change-Id: I4fe5831fb58f9de76c81aa4b60efa93cb100dab8
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Reported-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Reviewed-on: http://git-master/r/79648
Reviewed-by: Automatic_Commit_Validation_User
Diffstat (limited to 'fs/fscache')
0 files changed, 0 insertions, 0 deletions