forked from luck/tmp_suning_uos_patched
cf89af146b
If there is a device BTRFS_DEV_REPLACE_DEVID without the device replace item, then it means the filesystem is inconsistent state. This is either corruption or a crafted image. Fail the mount as this needs a closer look what is actually wrong. As of now if BTRFS_DEV_REPLACE_DEVID is present without the replace item, in __btrfs_free_extra_devids() we determine that there is an extra device, and free those extra devices but continue to mount the device. However, we were wrong in keeping tack of the rw_devices so the syzbot testcase failed: WARNING: CPU: 1 PID: 3612 at fs/btrfs/volumes.c:1166 close_fs_devices.part.0+0x607/0x800 fs/btrfs/volumes.c:1166 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 3612 Comm: syz-executor.2 Not tainted 5.9.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 panic+0x347/0x7c0 kernel/panic.c:231 __warn.cold+0x20/0x46 kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:close_fs_devices.part.0+0x607/0x800 fs/btrfs/volumes.c:1166 RSP: 0018:ffffc900091777e0 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffffffffffffffff RCX: ffffc9000c8b7000 RDX: 0000000000040000 RSI: ffffffff83097f47 RDI: 0000000000000007 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff8880988a187f R10: 0000000000000000 R11: 0000000000000001 R12: ffff88809593a130 R13: ffff88809593a1ec R14: ffff8880988a1908 R15: ffff88809593a050 close_fs_devices fs/btrfs/volumes.c:1193 [inline] btrfs_close_devices+0x95/0x1f0 fs/btrfs/volumes.c:1179 open_ctree+0x4984/0x4a2d fs/btrfs/disk-io.c:3434 btrfs_fill_super fs/btrfs/super.c:1316 [inline] btrfs_mount_root.cold+0x14/0x165 fs/btrfs/super.c:1672 The fix here is, when we determine that there isn't a replace item then fail the mount if there is a replace target device (devid 0). CC: stable@vger.kernel.org # 4.19+ Reported-by: syzbot+4cfe71a4da060be47502@syzkaller.appspotmail.com Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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.. | ||
tests | ||
acl.c | ||
async-thread.c | ||
async-thread.h | ||
backref.c | ||
backref.h | ||
block-group.c | ||
block-group.h | ||
block-rsv.c | ||
block-rsv.h | ||
btrfs_inode.h | ||
check-integrity.c | ||
check-integrity.h | ||
compression.c | ||
compression.h | ||
ctree.c | ||
ctree.h | ||
delalloc-space.c | ||
delalloc-space.h | ||
delayed-inode.c | ||
delayed-inode.h | ||
delayed-ref.c | ||
delayed-ref.h | ||
dev-replace.c | ||
dev-replace.h | ||
dir-item.c | ||
discard.c | ||
discard.h | ||
disk-io.c | ||
disk-io.h | ||
export.c | ||
export.h | ||
extent_io.c | ||
extent_io.h | ||
extent_map.c | ||
extent_map.h | ||
extent-io-tree.h | ||
extent-tree.c | ||
file-item.c | ||
file.c | ||
free-space-cache.c | ||
free-space-cache.h | ||
free-space-tree.c | ||
free-space-tree.h | ||
inode-item.c | ||
inode-map.c | ||
inode-map.h | ||
inode.c | ||
ioctl.c | ||
Kconfig | ||
locking.c | ||
locking.h | ||
lzo.c | ||
Makefile | ||
misc.h | ||
ordered-data.c | ||
ordered-data.h | ||
orphan.c | ||
print-tree.c | ||
print-tree.h | ||
props.c | ||
props.h | ||
qgroup.c | ||
qgroup.h | ||
raid56.c | ||
raid56.h | ||
rcu-string.h | ||
reada.c | ||
ref-verify.c | ||
ref-verify.h | ||
reflink.c | ||
reflink.h | ||
relocation.c | ||
root-tree.c | ||
scrub.c | ||
send.c | ||
send.h | ||
space-info.c | ||
space-info.h | ||
struct-funcs.c | ||
super.c | ||
sysfs.c | ||
sysfs.h | ||
transaction.c | ||
transaction.h | ||
tree-checker.c | ||
tree-checker.h | ||
tree-defrag.c | ||
tree-log.c | ||
tree-log.h | ||
ulist.c | ||
ulist.h | ||
uuid-tree.c | ||
volumes.c | ||
volumes.h | ||
xattr.c | ||
xattr.h | ||
zlib.c | ||
zstd.c |