jfs_dirty_inode called on read-only volume
Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
Unable to handle kernel paging request at virtual address dfff8000000000cf
KASAN: null-ptr-deref in range [0x0000000000000678-0x000000000000067f]
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff8000000000cf] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 5737 Comm: syz.1.303 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : JFS_SBI fs/jfs/jfs_incore.h:217 [inline]
pc : txEnd+0xbc/0x4e8 fs/jfs/jfs_txnmgr.c:507
lr : txEnd+0x98/0x4e8 fs/jfs/jfs_txnmgr.c:505
sp : ffff8000214e7120
x29: ffff8000214e7120 x28: 1ffff00002b2b314 x27: ffff800015959000
x26: 1ffff00002b2b314 x25: dfff800000000000 x24: 00000000ffffffe2
x23: ffff8000214e71a0 x22: 0000000000000110 x21: ffff800020019000
x20: 0000000000000000 x19: 0000000000000678 x18: 1fffe00033e6df7e
x17: ffff80001539d000 x16: ffff8000082dd25c x15: 0000000040000002
x14: 0000000000000001 x13: 1ffff00004003206 x12: 0000000000000000
x11: ff0080000a977920 x10: 0000000000000002 x9 : 6de55f86f3420e00
x8 : 00000000000000cf x7 : ffff8000082b57a8 x6 : 0000000000000000
x5 : ffff8000214e7060 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff800011cfdc80
 x0 : 0000000000000000

Call trace:
 JFS_SBI fs/jfs/jfs_incore.h:217 [inline]
 txEnd+0xbc/0x4e8 fs/jfs/jfs_txnmgr.c:507
 jfs_create+0x290/0x90c fs/jfs/namei.c:159
 lookup_open fs/namei.c:3533 [inline]
 open_last_lookups fs/namei.c:3601 [inline]
 path_openat+0xda8/0x27a0 fs/namei.c:3831
 do_filp_open+0x198/0x38c fs/namei.c:3861
 file_open_name fs/open.c:1265 [inline]
 filp_open+0x160/0x1cc fs/open.c:1285
 do_coredump+0x1568/0x1c90 fs/coredump.c:765
 get_signal+0xdfc/0x133c kernel/signal.c:2866
 do_signal arch/arm64/kernel/signal.c:1095 [inline]
 do_notify_resume+0x2a8/0x2c84 arch/arm64/kernel/signal.c:1148
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_da+0xb4/0x144 arch/arm64/kernel/entry-common.c:516
 el0t_64_sync_handler+0x90/0xf0 arch/arm64/kernel/entry-common.c:658
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 97bff068 f9400268 9119e113 d343fe68 (38796908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	97bff068 	bl	0xfffffffffeffc1a0
   4:	f9400268 	ldr	x8, [x19]
   8:	9119e113 	add	x19, x8, #0x678
   c:	d343fe68 	lsr	x8, x19, #3
* 10:	38796908 	ldrb	w8, [x8, x25] <-- trapping instruction