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| author | Vahram Martirosyan <vmartirosyan@gmail.com> | 2012-11-28 18:44:16 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2012-11-28 18:44:16 +0100 |
| commit | 766f44d46a726cb59f52a75c5c87425a10c4bade (patch) | |
| tree | 33aa0c54b0ad7dd3aa6036f4a6351827275286f1 /fs/ext4 | |
| parent | ext4: simple cleanup in fiemap codepath (diff) | |
| download | linux-766f44d46a726cb59f52a75c5c87425a10c4bade.tar.xz linux-766f44d46a726cb59f52a75c5c87425a10c4bade.zip | |
ext4: fixed potential NULL dereference in ext4_calculate_overhead()
The memset operation before check can cause a BUG if the memory
allocation failed. Since we are using get_zeroed_age, there is no
need to use memset anyway.
Found by the Spruce system in cooperation with the KEDR Framework.
Signed-off-by: Vahram Martirosyan <vmartirosyan@linuxtesting.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/super.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index ad6cd8aeb946..66a4e20424cf 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3206,7 +3206,6 @@ int ext4_calculate_overhead(struct super_block *sb) ext4_fsblk_t overhead = 0; char *buf = (char *) get_zeroed_page(GFP_KERNEL); - memset(buf, 0, PAGE_SIZE); if (!buf) return -ENOMEM; |