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f2fs: fix to check return value of f2fs_do_truncate_blocks() 

[ Upstream commit b851ee6ba3 ]

Otherwise, if truncation on cow_inode failed, remained data may
pollute current transaction of atomic write.

Cc: Daeho Jeong <daehojeong@google.com>
Fixes: a46bebd502 ("f2fs: synchronize atomic write aborts")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chao Yu 2023-04-05 22:44:53 +08:00 committed by Greg Kroah-Hartman
parent 3cd6ab3b54
commit 0e8f60bfdc
1 changed files with 5 additions and 1 deletions
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6
fs/f2fs/file.c
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@ -2117,7 +2117,11 @@ static int f2fs_ioc_start_atomic_write(struct file *filp, bool truncate)
clear_inode_flag(fi->cow_inode, FI_INLINE_DATA);
} else {
/* Reuse the already created COW inode */
f2fs_do_truncate_blocks(fi->cow_inode, 0, true);
ret = f2fs_do_truncate_blocks(fi->cow_inode, 0, true);
if (ret) {
f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
goto out;
}
}
f2fs_write_inode(inode, NULL);