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: 6039 Comm: syz.1.356 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
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 : ffff8000219e7540
x29: ffff8000219e7540 x28: ffff70000433cebc x27: ffff8000157c6000
x26: 1ffff00002af8d3c x25: dfff800000000000 x24: ffff8000157c6000
x23: ffff8000219e75e0 x22: 0000000000000110 x21: ffff80001fe39000
x20: 0000000000000000 x19: 0000000000000678 x18: ffff800011b8bf60
x17: ffff800018349000 x16: ffff8000082d9364 x15: ffff800017e2a000
x14: 0000000000000001 x13: 1ffff00003fc7206 x12: 0000000000080000
x11: 000000000002547e x10: 0000000000000002 x9 : eeb04dd44ffecc00
x8 : 00000000000000cf x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000219e7480 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff800011b8da80 x0 : 0000000000000000
Call trace:
 JFS_SBI fs/jfs/jfs_incore.h:217 [inline]
 txEnd+0xbc/0x4e8 fs/jfs/jfs_txnmgr.c:507
 jfs_create+0x28c/0x920 fs/jfs/namei.c:159
 lookup_open fs/namei.c:3490 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0xe18/0x26bc fs/namei.c:3788
 do_filp_open+0x194/0x384 fs/namei.c:3818
 do_sys_openat2+0x134/0x3f4 fs/open.c:1320
 do_sys_open fs/open.c:1336 [inline]
 __do_sys_openat fs/open.c:1352 [inline]
 __se_sys_openat fs/open.c:1347 [inline]
 __arm64_sys_openat+0x118/0x14c fs/open.c:1347
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 97c077fa f9400268 9119e113 d343fe68 (38796908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	97c077fa 	bl	0xffffffffff01dfe8
   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