From: Chao Yu chao@kernel.org
[ Upstream commit b851ee6ba3cc212641e622ebcf92b950c7bafa07 ]
Otherwise, if truncation on cow_inode failed, remained data may pollute current transaction of atomic write.
Cc: Daeho Jeong daehojeong@google.com Fixes: a46bebd502fe ("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 --- fs/f2fs/file.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index c1e24da4dfec3..bf37983304a33 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -2115,7 +2115,11 @@ static int f2fs_ioc_start_atomic_write(struct file *filp) 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);