syzbot

BTRFS info (device loop2): last unmount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf
Unable to handle kernel paging request at virtual address ebff9fffe0001824
KASAN: maybe wild-memory-access in range [0x6000ffff0000c120-0x6000ffff0000c127]
Mem abort info:
  ESR = 0x0000000096000004
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[ebff9fffe0001824] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6428 Comm: syz-executor Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __lock_acquire+0xfc/0x7904 kernel/locking/lockdep.c:5089
lr : lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5849
sp : ffff8000a49c7440
x29: ffff8000a49c7700 x28: ffff800080368be4 x27: 0000000000000000
x26: ffff0001b37e1500 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000000 x22: 1ffff00011f340ca x21: 6000ffff0000c120
x20: 0000000000000001 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800083275834 x15: 0000000000000001
x14: 1ffff00011f340ca x13: dfff800000000000 x12: ffff700014938eb0
x11: ffff8000804673d0 x10: ffff80008f9a0650 x9 : 00000000000000f3
x8 : 0c001fffe0001824 x7 : ffff800080368be4 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 6000ffff0000c120
Call trace:
 __lock_acquire+0xfc/0x7904 kernel/locking/lockdep.c:5089 (P)
 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5849
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0x58/0x70 kernel/locking/spinlock.c:170
 put_pwq_unlocked kernel/workqueue.c:1662 [inline]
 destroy_workqueue+0x8d8/0xdc0 kernel/workqueue.c:5897
 btrfs_destroy_workqueue+0x48/0x308 fs/btrfs/async-thread.c:360
 btrfs_stop_all_workers+0x1c0/0x240 fs/btrfs/disk-io.c:1792
 close_ctree+0x5c0/0xb60 fs/btrfs/disk-io.c:4369
 btrfs_put_super+0x70/0x80 fs/btrfs/super.c:74
 generic_shutdown_super+0x12c/0x2bc fs/super.c:642
 kill_anon_super+0x4c/0x7c fs/super.c:1237
 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2100
 deactivate_locked_super+0xc4/0x12c fs/super.c:473
 deactivate_super+0xe0/0x100 fs/super.c:506
 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1373
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1380
 task_work_run+0x230/0x2e0 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: b007a9c8 b9465108 340090a8 d343fea8 (386d6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	b007a9c8 	adrp	x8, 0xf539000
   4:	b9465108 	ldr	w8, [x8, #1616]
   8:	340090a8 	cbz	w8, 0x121c
   c:	d343fea8 	lsr	x8, x21, #3
* 10:	386d6908 	ldrb	w8, [x8, x13] <-- trapping instruction