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| author |   Haogang Chen <haogangchen@gmail.com> | 2012-05-28 14:21:55 -0400 |
|---|---|---|
| committer |   Theodore Ts'o <tytso@mit.edu> | 2012-05-28 14:21:55 -0400 |
| commit | 967ac8af4475ce45474800709b12137aa7634c77 (patch) | |
| tree | b40d665c1620e801f313ff516c7986e8c3cdbd59 /drivers/spi/spi-omap2-mcspi.c | |
| parent | ext4: remove needs_recovery in ext4_mb_init() (diff) | |
| download | wireguard-linux-967ac8af4475ce45474800709b12137aa7634c77.tar.xz wireguard-linux-967ac8af4475ce45474800709b12137aa7634c77.zip | |
ext4: fix potential integer overflow in alloc_flex_gd()
In alloc_flex_gd(), when flexbg_size is large, kmalloc size would
overflow and flex_gd->groups would point to a buffer smaller than
expected, causing OOB accesses when it is used.
Note that in ext4_resize_fs(), flexbg_size is calculated using
sbi->s_log_groups_per_flex, which is read from the disk and only bounded
to [1, 31]. The patch returns NULL for too large flexbg_size.
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Haogang Chen <haogangchen@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
Diffstat (limited to 'drivers/spi/spi-omap2-mcspi.c')
0 files changed, 0 insertions, 0 deletions