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: 4030 Comm: syz-executor174 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
pc : lmLogSync+0x210/0x88c fs/jfs/jfs_logmgr.c:945
lr : write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
lr : lmLogSync+0x1ec/0x88c fs/jfs/jfs_logmgr.c:945
sp : ffff80001f4f7840
x29: ffff80001f4f7900 x28: 1ffff0000282ba9c x27: dfff800000000000
x26: fffffbffeffa6e6c x25: 1fffe0001b69cc2c x24: ffff80001f4f7860
x23: dfff800000000000 x22: ffff700003e9ef0c x21: 0000000000000030
x20: ffff0000c0fdba38 x19: ffff0000c242b800 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082b559c x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 1ffff0000282c06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : b0c0c0b9af794200
x8 : 0000000000000006 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800008671e14
x2 : ffffffffffffffc0 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
 lmLogSync+0x210/0x88c fs/jfs/jfs_logmgr.c:945
 jfs_syncpt+0x70/0x94 fs/jfs/jfs_logmgr.c:1049
 jfs_sync_fs+0x8c/0xac fs/jfs/super.c:690
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 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+0xf8/0x118 fs/super.c:366
 cleanup_mnt+0x3a4/0x458 fs/namespace.c:1139
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1146
 task_work_run+0x12c/0x1e0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949
 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+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 97c1fe62 f94002a8 9100c115 d343fea8 (387b6908) 
---[ end trace f7a7b7b2bd36757e ]---
----------------
Code disassembly (best guess):
   0:	97c1fe62 	bl	0xffffffffff07f988
   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