diff options
| author | Chao Yu <chao@kernel.org> | 2023-04-04 23:28:07 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2023-04-12 20:00:36 -0700 |
| commit | d78dfefcde9d311284434560d69c0478c55a657e (patch) | |
| tree | 38b952f3f2f153eda85b1d6ab2490f1e689bc5b5 /fs/f2fs | |
| parent | 562abda40188ee20113c21e8bfad725d6fd61056 (diff) | |
| download | linux-d78dfefcde9d311284434560d69c0478c55a657e.tar.gz | |
f2fs: fix to check readonly condition correctly
With below case, it can mount multi-device image w/ rw option, however
one of secondary device is set as ro, later update will cause panic, so
let's introduce f2fs_dev_is_readonly(), and check multi-devices rw status
in f2fs_remount() w/ it in order to avoid such inconsistent mount status.
mkfs.f2fs -c /dev/zram1 /dev/zram0 -f
blockdev --setro /dev/zram1
mount -t f2fs dev/zram0 /mnt/f2fs
mount: /mnt/f2fs: WARNING: source write-protected, mounted read-only.
mount -t f2fs -o remount,rw mnt/f2fs
dd if=/dev/zero of=/mnt/f2fs/file bs=1M count=8192
kernel BUG at fs/f2fs/inline.c:258!
RIP: 0010:f2fs_write_inline_data+0x23e/0x2d0 [f2fs]
Call Trace:
f2fs_write_single_data_page+0x26b/0x9f0 [f2fs]
f2fs_write_cache_pages+0x389/0xa60 [f2fs]
__f2fs_write_data_pages+0x26b/0x2d0 [f2fs]
f2fs_write_data_pages+0x2e/0x40 [f2fs]
do_writepages+0xd3/0x1b0
__writeback_single_inode+0x5b/0x420
writeback_sb_inodes+0x236/0x5a0
__writeback_inodes_wb+0x56/0xf0
wb_writeback+0x2a3/0x490
wb_do_writeback+0x2b2/0x330
wb_workfn+0x6a/0x260
process_one_work+0x270/0x5e0
worker_thread+0x52/0x3e0
kthread+0xf4/0x120
ret_from_fork+0x29/0x50
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/f2fs.h | 5 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 68eadc1ac130..30e31bb5c2ce 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -4430,6 +4430,11 @@ static inline bool f2fs_hw_is_readonly(struct f2fs_sb_info *sbi) return false; } +static inline bool f2fs_dev_is_readonly(struct f2fs_sb_info *sbi) +{ + return f2fs_sb_has_readonly(sbi) || f2fs_hw_is_readonly(sbi); +} + static inline bool f2fs_lfs_mode(struct f2fs_sb_info *sbi) { return F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS; diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index ba0ad1e0fe3a..8f9086d53d52 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -2288,7 +2288,7 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data) if (f2fs_readonly(sb) && (*flags & SB_RDONLY)) goto skip; - if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) { + if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) { err = -EROFS; goto restore_opts; } |