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| author | Chandan Rajendra <chandan@linux.vnet.ibm.com> | 2016-11-15 05:26:26 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-11-15 05:26:26 +0300 |
| commit | 30a9d7afe70ed6bd9191d3000e2ef1a34fb58493 (patch) | |
| tree | 9c8c589c6c34e4846d06b2967a5392f32a479831 /fs/ext4/namei.c | |
| parent | 69e43e8cc971a79dd1ee5d4343d8e63f82725123 (diff) | |
| download | linux-30a9d7afe70ed6bd9191d3000e2ef1a34fb58493.tar.xz | |
ext4: fix stack memory corruption with 64k block size
The number of 'counters' elements needed in 'struct sg' is
super_block->s_blocksize_bits + 2. Presently we have 16 'counters'
elements in the array. This is insufficient for block sizes >= 32k. In
such cases the memcpy operation performed in ext4_mb_seq_groups_show()
would cause stack memory corruption.
Fixes: c9de560ded61f
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/ext4/namei.c')
0 files changed, 0 insertions, 0 deletions