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omfs: fix potential integer overflow in allocator

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Both 'i' and 'bits_per_entry' are signed integers but the result is a
u64 block number.  Cast i to u64 to avoid truncation on 32-bit targets.

Found by Coverity (CID 200679).

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bob Copeland 2015-05-28 15:44:37 -07:00 committed by Linus Torvalds
parent c0345ee57d
commit 5a6b2b36a8
1 changed files with 1 additions and 1 deletions
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2
fs/omfs/bitmap.c
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@ -159,7 +159,7 @@ int omfs_allocate_range(struct super_block *sb,
goto out;
found:
*return_block = i * bits_per_entry + bit;
*return_block = (u64) i * bits_per_entry + bit;
*return_size = run;
ret = set_run(sb, i, bits_per_entry, bit, run, 1);