Ryusuke Konishi 28a65b49eb nilfs2: do not write dirty data after degenerating to read-only ... According to syzbot's report, mark_buffer_dirty() called from nilfs_segctor_do_construct() outputs a warning with some patterns after nilfs2 detects metadata corruption and degrades to read-only mode. After such read-only degeneration, page cache data may be cleared through nilfs_clear_dirty_page() which may also clear the uptodate flag for their buffer heads. However, even after the degeneration, log writes are still performed by unmount processing etc., which causes mark_buffer_dirty() to be called for buffer heads without the "uptodate" flag and causes the warning. Since any writes should not be done to a read-only file system in the first place, this fixes the warning in mark_buffer_dirty() by letting nilfs_segctor_do_construct() abort early if in read-only mode. This also changes the retry check of nilfs_segctor_write_out() to avoid unnecessary log write retries if it detects -EROFS that nilfs_segctor_do_construct() returned. Link: https://lkml.kernel.org/r/20230427011526.13457-1-konishi.ryusuke@gmail.com Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Tested-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Reported-by: syzbot+2af3bc9585be7f23f290@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=2af3bc9585be7f23f290 Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2023-05-06 10:10:07 -07:00
..
alloc.c
alloc.h
bmap.c	nilfs2: fix infinite loop in nilfs_mdt_get_block()	2023-05-06 10:10:07 -07:00
bmap.h
btnode.c
btnode.h
btree.c	nilfs2: initialize "struct nilfs_binfo_dat"->bi_pad field	2023-04-05 18:06:23 -07:00
btree.h
cpfile.c
cpfile.h
dat.c
dat.h
dir.c
direct.c	nilfs2: initialize "struct nilfs_binfo_dat"->bi_pad field	2023-04-05 18:06:23 -07:00
direct.h
export.h
file.c
gcinode.c
ifile.c
ifile.h
inode.c
ioctl.c	nilfs2: fix kernel-infoleak in nilfs_ioctl_wrap_copy()	2023-03-23 17:18:32 -07:00
Kconfig
Makefile
mdt.c
mdt.h
namei.c
nilfs.h
page.c	mm: return an ERR_PTR from __filemap_get_folio	2023-04-05 19:42:42 -07:00
page.h
recovery.c
segbuf.c
segbuf.h
segment.c	nilfs2: do not write dirty data after degenerating to read-only	2023-05-06 10:10:07 -07:00
segment.h
sufile.c
sufile.h
super.c	nilfs2: fix sysfs interface lifetime	2023-04-05 18:06:24 -07:00
sysfs.c
sysfs.h
the_nilfs.c	nilfs2: fix sysfs interface lifetime	2023-04-05 18:06:24 -07:00
the_nilfs.h