syzbot

XFS (loop3): Unmounting Filesystem d7dc424e-7990-42cb-9f91-9cb7200a101d
Unable to handle kernel paging request at virtual address 001f7fe0003386d6
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
[001f7fe0003386d6] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6495 Comm: syz-executor Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 204000c5 (nzCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : kasan_byte_accessible+0x10/0x20 mm/kasan/generic.c:199
lr : __kasan_check_byte+0x20/0x54 mm/kasan/common.c:556
sp : ffff8000a25579d0
x29: ffff8000a25579d0 x28: ffff80008f321000 x27: ffff0000d7f65b80
x26: ffff80008addf920 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000000 x22: 00ffff00019c36b6 x21: 00ffff00019c36b6
x20: 0000000000000000 x19: ffff80008addf920 x18: 1fffe0003386aa76
x17: ffff0001fea8a870 x16: ffff80008adbe9e4 x15: 0000000000000001
x14: 1ffff000144aaf44 x13: 0000000000000000 x12: 0000000000000000
x11: 000000006974828d x10: 0000000000000003 x9 : dfff800000000000
x8 : 001fffe0003386d6 x7 : ffff800080433050 x6 : ffff80008042155c
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : ffff80008addf920 x0 : 00ffff00019c36b6
Call trace:
 kasan_mem_to_shadow include/linux/kasan.h:64 [inline] (P)
 kasan_byte_accessible+0x10/0x20 mm/kasan/generic.c:199 (P)
 kasan_check_byte include/linux/kasan.h:399 [inline]
 lock_acquire+0xb0/0x2e0 kernel/locking/lockdep.c:5840
 __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+0x8b8/0xd94 kernel/workqueue.c:5911
 xfs_destroy_mount_workqueues+0x74/0xdc fs/xfs/xfs_super.c:624
 xfs_fs_put_super+0x128/0x144 fs/xfs/xfs_super.c:1242
 generic_shutdown_super+0x12c/0x2b8 fs/super.c:642
 kill_block_super+0x44/0x90 fs/super.c:1710
 xfs_kill_sb+0x20/0x58 fs/xfs/xfs_super.c:2246
 deactivate_locked_super+0xc4/0x12c fs/super.c:473
 deactivate_super+0xe0/0x100 fs/super.c:506
 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1431
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1438
 task_work_run+0x1dc/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x16c/0x1ec 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+0xb4/0x17c arch/arm64/kernel/entry-common.c:768
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: d503245f d343fc08 d2d00009 f2fbffe9 (38696908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	d503245f 	bti	c
   4:	d343fc08 	lsr	x8, x0, #3
   8:	d2d00009 	mov	x9, #0x800000000000        	// #140737488355328
   c:	f2fbffe9 	movk	x9, #0xdfff, lsl #48
* 10:	38696908 	ldrb	w8, [x8, x9] <-- trapping instruction