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f2fs: compress: fix to relocate check condition in f2fs_ioc_{,de}compress_file()

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[ Upstream commit bd9ae4ae9e ]

Compress flag should be checked after inode lock held to avoid
racing w/ f2fs_setflags_common() , fix it.

Fixes: 5fdb322ff2 ("f2fs: add F2FS_IOC_DECOMPRESS_FILE and F2FS_IOC_COMPRESS_FILE")
Reported-by: Zhiguo Niu <zhiguo.niu@unisoc.com>
Closes: https://lore.kernel.org/linux-f2fs-devel/CAHJ8P3LdZXLc2rqeYjvymgYHr2+YLuJ0sLG9DdsJZmwO7deuhw@mail.gmail.com
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 2024-04-07 15:26:04 +08:00 committed by Greg Kroah-Hartman
parent 3192c383f3
commit 0661153777
1 changed files with 4 additions and 8 deletions
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12
fs/f2fs/file.c
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@ -4064,9 +4064,6 @@ static int f2fs_ioc_decompress_file(struct file *filp, unsigned long arg)
if (!(filp->f_mode & FMODE_WRITE))
return -EBADF;
if (!f2fs_compressed_file(inode))
return -EINVAL;
f2fs_balance_fs(sbi, true);
file_start_write(filp);
@ -4077,7 +4074,8 @@ static int f2fs_ioc_decompress_file(struct file *filp, unsigned long arg)
goto out;
}
if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
if (!f2fs_compressed_file(inode) ||
is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
ret = -EINVAL;
goto out;
}
@ -4136,9 +4134,6 @@ static int f2fs_ioc_compress_file(struct file *filp, unsigned long arg)
if (!(filp->f_mode & FMODE_WRITE))
return -EBADF;
if (!f2fs_compressed_file(inode))
return -EINVAL;
f2fs_balance_fs(sbi, true);
file_start_write(filp);
@ -4149,7 +4144,8 @@ static int f2fs_ioc_compress_file(struct file *filp, unsigned long arg)
goto out;
}
if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
if (!f2fs_compressed_file(inode) ||
is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
ret = -EINVAL;
goto out;
}