In the f2fs_wait_on_page_writeback, io->bio should be covered by io_rwsem. Otherwise, the bio pointer can become a dangling pointer due to data races.
Signed-off-by: Jaegeuk Kim <[email protected]> --- fs/f2fs/segment.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index cb49e63..f799c6a 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -1049,15 +1049,14 @@ static inline bool is_merged_page(struct f2fs_sb_info *sbi, { enum page_type btype = PAGE_TYPE_OF_BIO(type); struct f2fs_bio_info *io = &sbi->write_io[btype]; - struct bio *bio = io->bio; struct bio_vec *bvec; int i; down_read(&io->io_rwsem); - if (!bio) + if (!io->bio) goto out; - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, io->bio, i) { if (page == bvec->bv_page) { up_read(&io->io_rwsem); return true; -- 1.8.4.474.g128a96c ------------------------------------------------------------------------------ _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
