f2fs: fix to check return value of f2fs_do_truncate_blocks()
[ Upstream commitb851ee6ba3
] 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>
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@ -2117,7 +2117,11 @@ static int f2fs_ioc_start_atomic_write(struct file *filp, bool truncate)
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clear_inode_flag(fi->cow_inode, FI_INLINE_DATA);
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} else {
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/* Reuse the already created COW inode */
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f2fs_do_truncate_blocks(fi->cow_inode, 0, true);
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ret = f2fs_do_truncate_blocks(fi->cow_inode, 0, true);
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if (ret) {
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f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
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goto out;
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}
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}
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f2fs_write_inode(inode, NULL);
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