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| author | Daejun Park <daejun7.park@samsung.com> | 2024-07-04 04:01:21 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-08-03 10:01:00 +0300 |
| commit | 381cbe85592c78fbaeb3e770e3e9f3bfa3e67efb (patch) | |
| tree | 0a39aef584cd65a19633b88f39135659b3ad854c /fs/f2fs | |
| parent | e0671f99ae6ef05515ecf6a35aede86d9cd69c4c (diff) | |
| download | linux-381cbe85592c78fbaeb3e770e3e9f3bfa3e67efb.tar.xz | |
f2fs: fix null reference error when checking end of zone
[ Upstream commit c82bc1ab2a8a5e73d9728e80c4c2ed87e8921a38 ]
This patch fixes a potentially null pointer being accessed by
is_end_zone_blkaddr() that checks the last block of a zone
when f2fs is mounted as a single device.
Fixes: e067dc3c6b9c ("f2fs: maintain six open zones for zoned devices")
Signed-off-by: Daejun Park <daejun7.park@samsung.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Reviewed-by: Daeho Jeong <daehojeong@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/data.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 03bfba48b1cf..467f67cf2b38 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -925,6 +925,7 @@ alloc_new: #ifdef CONFIG_BLK_DEV_ZONED static bool is_end_zone_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr) { + struct block_device *bdev = sbi->sb->s_bdev; int devi = 0; if (f2fs_is_multi_device(sbi)) { @@ -935,8 +936,9 @@ static bool is_end_zone_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr) return false; } blkaddr -= FDEV(devi).start_blk; + bdev = FDEV(devi).bdev; } - return bdev_is_zoned(FDEV(devi).bdev) && + return bdev_is_zoned(bdev) && f2fs_blkz_is_seq(sbi, devi, blkaddr) && (blkaddr % sbi->blocks_per_blkz == sbi->blocks_per_blkz - 1); } |