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| author | Sheng Yong <shengyong1@xiaomi.com> | 2025-06-07 14:41:16 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2025-06-23 22:13:01 +0000 |
| commit | 554d9b7242a73d701ce121ac81bb578a3fca538e (patch) | |
| tree | fbc3e2a56f6217cf4397ff3b3b37482097a0c08b | |
| parent | 70b6e8500431ca8bd8d1471ae721d61fc2acc844 (diff) | |
| download | linux-next-554d9b7242a73d701ce121ac81bb578a3fca538e.tar.gz linux-next-554d9b7242a73d701ce121ac81bb578a3fca538e.zip | |
f2fs: fix bio memleak when committing super block
When committing new super block, bio is allocated but not freed, and
kmemleak complains:
unreferenced object 0xffff88801d185600 (size 192):
comm "kworker/3:2", pid 128, jiffies 4298624992
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 80 67 c3 00 81 88 ff ff .........g......
01 08 06 00 00 00 00 00 00 00 00 00 01 00 00 00 ................
backtrace (crc 650ecdb1):
kmem_cache_alloc_noprof+0x3a9/0x460
mempool_alloc_noprof+0x12f/0x310
bio_alloc_bioset+0x1e2/0x7e0
__f2fs_commit_super+0xe0/0x370
f2fs_commit_super+0x4ed/0x8c0
f2fs_record_error_work+0xc7/0x190
process_one_work+0x7db/0x1970
worker_thread+0x518/0xea0
kthread+0x359/0x690
ret_from_fork+0x34/0x70
ret_from_fork_asm+0x1a/0x30
The issue can be reproduced by:
mount /dev/vda /mnt
i=0
while :; do
echo '[h]abc' > /sys/fs/f2fs/vda/extension_list
echo '[h]!abc' > /sys/fs/f2fs/vda/extension_list
echo scan > /sys/kernel/debug/kmemleak
dmesg | grep "new suspected memory leaks"
[ $? -eq 0 ] && break
i=$((i + 1))
echo "$i"
done
umount /mnt
Fixes: 5bcde4557862 ("f2fs: get rid of buffer_head use")
Signed-off-by: Sheng Yong <shengyong1@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/super.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index bbf1dad6843f..4cbf3a133474 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -3451,6 +3451,7 @@ static int __f2fs_commit_super(struct f2fs_sb_info *sbi, struct folio *folio, f2fs_bug_on(sbi, 1); ret = submit_bio_wait(bio); + bio_put(bio); folio_end_writeback(folio); return ret; |