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| author | Harshad Shirwadkar <harshadshirwadkar@gmail.com> | 2020-04-20 19:39:59 -0700 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2020-06-03 23:16:49 -0400 |
| commit | c36a71b4e35ab35340facdd6964a00956b9fef0a (patch) | |
| tree | bd5d5792db46bc4e03233af0e696601e56385e14 /fs/ext4/ialloc.c | |
| parent | 39c0ae163f3b3ae691e7cce226ba1984ef6456b1 (diff) | |
| download | lwn-c36a71b4e35ab35340facdd6964a00956b9fef0a.tar.gz lwn-c36a71b4e35ab35340facdd6964a00956b9fef0a.zip | |
ext4: fix EXT_MAX_EXTENT/INDEX to check for zeroed eh_max
If eh->eh_max is 0, EXT_MAX_EXTENT/INDEX would evaluate to unsigned
(-1) resulting in illegal memory accesses. Although there is no
consistent repro, we see that generic/019 sometimes crashes because of
this bug.
Ran gce-xfstests smoke and verified that there were no regressions.
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20200421023959.20879-2-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Diffstat (limited to 'fs/ext4/ialloc.c')
0 files changed, 0 insertions, 0 deletions