Unable to handle kernel paging request at virtual address fcaa801fffe00039
KASAN: maybe wild-memory-access in range [0xe55800ffff0001c8-0xe55800ffff0001cf]
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
[fcaa801fffe00039] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1] SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6475 Comm: syz-executor Not tainted 6.15.0-rc2-syzkaller-gc72692105976 #0 PREEMPT
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 804000c5 (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 : ffff8000a5387950
x29: ffff8000a5387950 x28: ffff80008ff31000 x27: ffff0000d940db80
x26: ffff80008b9ad5f4 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000000 x22: e55800ffff0001cb x21: e55800ffff0001cb
x20: 0000000000000000 x19: ffff80008b9ad5f4 x18: 1fffe000366ddeb6
x17: ffff80008ff2e000 x16: ffff80008333712c x15: 0000000000000001
x14: 1fffe000366e0899 x13: ffff8000a5388000 x12: ffff8000a5387a40
x11: ffff8000a5387a60 x10: 0000000000000003 x9 : 1cab001fffe00039
x8 : dfff800000000000 x7 : ffff80008039f480 x6 : ffff8000803777c8
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : ffff80008b9ad5f4 x0 : e55800ffff0001cb
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+0xb4/0x2e8 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+0x8d8/0xdc0 kernel/workqueue.c:5911
__bch2_fs_free fs/bcachefs/super.c:612 [inline]
bch2_fs_release+0x5f4/0x720 fs/bcachefs/super.c:627
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x2a8/0x41c lib/kobject.c:737
bch2_fs_free+0x314/0x384 fs/bcachefs/super.c:690
bch2_kill_sb+0x48/0x58 fs/bcachefs/fs.c:2304
deactivate_locked_super+0xc4/0x12c fs/super.c:473
deactivate_super+0xe0/0x100 fs/super.c:506
cleanup_mnt+0x34c/0x3dc fs/namespace.c:1435
__cleanup_mnt+0x20/0x30 fs/namespace.c:1442
task_work_run+0x230/0x2e0 kernel/task_work.c:227
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: d503245f d2d00008 d343fc09 f2fbffe8 (38686928)
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
0: d503245f bti c
4: d2d00008 mov x8, #0x800000000000 // #140737488355328
8: d343fc09 lsr x9, x0, #3
c: f2fbffe8 movk x8, #0xdfff, lsl #48
* 10: 38686928 ldrb w8, [x9, x8] <-- trapping instruction