loop6: detected capacity change from 0 to 32768
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 UID: 0 PID: 7411 Comm: syz.6.301 Not tainted 6.16.0-syzkaller-11322-g352af6a011d5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x22e/0x9d0 fs/jfs/jfs_logmgr.c:937
Code: 9d b5 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 b0 8a e2 fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 94 8a e2 fe 49 8b 3f e8 6c 9d b5 fe
RSP: 0018:ffffc900036bf7a0 EFLAGS: 00010216
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88807d819e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900036bf8a8 R08: ffffc900036bf6ef R09: ffffc900036bf588
R10: dffffc0000000000 R11: fffff520006d7ede R12: ffff888033406800
R13: dffffc0000000000 R14: ffff888078a4d238 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff888125d2a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe9cfb927d0 CR3: 0000000059497000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 jfs_syncpt+0x7b/0x90 fs/jfs/jfs_logmgr.c:1041
 jfs_sync_fs+0x87/0xa0 fs/jfs/super.c:650
 sync_filesystem+0xee/0x230 fs/sync.c:56
 generic_shutdown_super+0x6f/0x2c0 fs/super.c:622
 kill_block_super+0x44/0x90 fs/super.c:1766
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1378
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6b5/0x2300 kernel/exit.c:966
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
 get_signal+0x1286/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9d3758eb69
Code: Unable to access opcode bytes at 0x7f9d3758eb3f.
RSP: 002b:00007f9d383320e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f9d377b5fa8 RCX: 00007f9d3758eb69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9d377b5fa8
RBP: 00007f9d377b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9d377b5fac
R13: 0000000000000000 R14: 00007ffe4fb0a2c0 R15: 00007ffe4fb0a3a8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x22e/0x9d0 fs/jfs/jfs_logmgr.c:937
Code: 9d b5 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 b0 8a e2 fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 94 8a e2 fe 49 8b 3f e8 6c 9d b5 fe
RSP: 0018:ffffc900036bf7a0 EFLAGS: 00010216
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88807d819e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900036bf8a8 R08: ffffc900036bf6ef R09: ffffc900036bf588
R10: dffffc0000000000 R11: fffff520006d7ede R12: ffff888033406800
R13: dffffc0000000000 R14: ffff888078a4d238 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff888125c2a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcdf1fb9000 CR3: 0000000043c04000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	9d                   	popf
   1:	b5 fe                	mov    $0xfe,%ch
   3:	4d 8d 7e f0          	lea    -0x10(%r14),%r15
   7:	4c 89 f8             	mov    %r15,%rax
   a:	48 c1 e8 03          	shr    $0x3,%rax
   e:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  12:	74 08                	je     0x1c
  14:	4c 89 ff             	mov    %r15,%rdi
  17:	e8 b0 8a e2 fe       	call   0xfee28acc
  1c:	4d 8b 3f             	mov    (%r15),%r15
  1f:	49 83 c7 30          	add    $0x30,%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 94 8a e2 fe       	call   0xfee28acc
  38:	49 8b 3f             	mov    (%r15),%rdi
  3b:	e8 6c 9d b5 fe       	call   0xfeb59dac