syzbot

Unable to handle kernel paging request at virtual address dfff800000000006
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
[dfff800000000006] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4022 Comm: syz-executor255 Not tainted 5.15.171-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
pc : lmLogSync+0x210/0x98c fs/jfs/jfs_logmgr.c:945
lr : write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
lr : lmLogSync+0x1ec/0x98c fs/jfs/jfs_logmgr.c:945
sp : ffff80001fc07780
x29: ffff80001fc07850 x28: 1ffff00002959a9d x27: dfff800000000000
x26: fffffbffeffa6bf8 x25: ffff80001fc077a0 x24: 1fffe0001a0a4806
x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000030
x20: ffff0000d3296e38 x19: ffff0000c8b1d000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80000824ebd0 x15: 00000000ffffffff
x14: 1ffff0000295a06a x13: dfff800000000000 x12: 0000000000000003
x11: 0000000000000000 x10: 0000000000000000 x9 : b2e9609468e66400
x8 : 0000000000000006 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000008 x3 : 0000000000000010
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
 lmLogSync+0x210/0x98c fs/jfs/jfs_logmgr.c:945
 jfs_syncpt+0x74/0x98 fs/jfs/jfs_logmgr.c:1049
 jfs_sync_fs+0x8c/0xac fs/jfs/super.c:690
 sync_filesystem+0xe8/0x218 fs/sync.c:56
 generic_shutdown_super+0x70/0x2f0 fs/super.c:448
 kill_block_super+0x70/0xdc fs/super.c:1427
 deactivate_locked_super+0xb8/0x13c fs/super.c:335
 deactivate_super+0x108/0x128 fs/super.c:366
 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150
 task_work_run+0x130/0x1e4 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 97bf9726 f94002a8 9100c115 d343fea8 (387b6908) 
---[ end trace c412c63850a332ec ]---
----------------
Code disassembly (best guess):
   0:	97bf9726 	bl	0xfffffffffefe5c98
   4:	f94002a8 	ldr	x8, [x21]
   8:	9100c115 	add	x21, x8, #0x30
   c:	d343fea8 	lsr	x8, x21, #3
* 10:	387b6908 	ldrb	w8, [x8, x27] <-- trapping instruction