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| author |   Chao Yu <yuchao0@huawei.com> | 2018-04-25 19:38:17 +0800 |
|---|---|---|
| committer |   Jaegeuk Kim <jaegeuk@kernel.org> | 2018-05-31 11:31:49 -0700 |
| commit | a9af3fdcc4258af406879eca63d82e9d6baa892e (patch) | |
| tree | 34a64f714cb55337dfdce76655d58a26e0f26534 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | f2fs: rename dio_rwsem to i_gc_rwsem (diff) | |
| download | wireguard-linux-a9af3fdcc4258af406879eca63d82e9d6baa892e.tar.xz wireguard-linux-a9af3fdcc4258af406879eca63d82e9d6baa892e.zip | |
f2fs: fix potential overflow
In build_sit_entries(), if valid_blocks in SIT block is smaller than
valid_blocks in journal, for below calculation:
sbi->discard_blks += old_valid_blocks - se->valid_blocks;
There will be two times potential overflow:
- old_valid_blocks - se->valid_blocks will overflow, and be a very
large number.
- sbi->discard_blks += result will overflow again, comes out a correct
result accidently.
Anyway, it should be fixed.
Fixes: d600af236da5 ("f2fs: avoid unneeded loop in build_sit_entries")
Fixes: 1f43e2ad7bff ("f2fs: introduce CP_TRIMMED_FLAG to avoid unneeded discard")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions