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f2fs: fix to avoid accessing invalid fio in f2fs_allocate_data_block()

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[ Upstream commit 25ae837e61 ]

Callers may pass fio parameter with NULL value to f2fs_allocate_data_block(),
so we should make sure accessing fio's field after fio's validation check.

Fixes: f608c38c59 ("f2fs: clean up parameter of f2fs_allocate_data_block()")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chao Yu 2021-04-02 17:22:23 +08:00 committed by Greg Kroah-Hartman
parent 1fd6a06410
commit b59194c7ca
1 changed files with 3 additions and 3 deletions
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6
fs/f2fs/segment.c
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@ -3407,12 +3407,12 @@ void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
f2fs_inode_chksum_set(sbi, page);
}
if (F2FS_IO_ALIGNED(sbi))
fio->retry = false;
if (fio) {
struct f2fs_bio_info *io;
if (F2FS_IO_ALIGNED(sbi))
fio->retry = false;
INIT_LIST_HEAD(&fio->list);
fio->in_list = true;
io = sbi->write_io[fio->type] + fio->temp;