workqueue: Failed to create a rescuer kthread for wq "kcopyd": -EINTR
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:82 [inline]
BUG: KASAN: null-ptr-deref in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: null-ptr-deref in dm_kcopyd_client_destroy+0xa0/0x3c4 drivers/md/dm-kcopyd.c:980
Read of size 4 at addr 0000000000000174 by task syz.4.596/7191

CPU: 1 UID: 0 PID: 7191 Comm: syz.4.596 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_report+0x58/0x84 mm/kasan/report.c:485
 kasan_report+0x8c/0xc4 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x17c/0x1ac mm/kasan/generic.c:200
 __kasan_check_read+0x20/0x30 mm/kasan/shadow.c:31
 instrument_atomic_read include/linux/instrumented.h:82 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 dm_kcopyd_client_destroy+0xa0/0x3c4 drivers/md/dm-kcopyd.c:980
 __destroy+0x15c/0x2cc drivers/md/dm-cache-target.c:1973
 cache_create drivers/md/dm-cache-target.c:2604 [inline]
 cache_ctr+0xe78/0x1f1c drivers/md/dm-cache-target.c:2649
 dm_table_add_target+0x44c/0xb18 drivers/md/dm-table.c:749
 populate_table drivers/md/dm-ioctl.c:1602 [inline]
 table_load+0x27c/0x764 drivers/md/dm-ioctl.c:1645
 ctl_ioctl drivers/md/dm-ioctl.c:2221 [inline]
 dm_ctl_ioctl+0x884/0xbbc drivers/md/dm-ioctl.c:2243
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __arm64_sys_ioctl+0x154/0x1cc fs/ioctl.c:583
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796
 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606
==================================================================
Unable to handle kernel paging request at virtual address dfff80000000002e
KASAN: null-ptr-deref in range [0x0000000000000170-0x0000000000000177]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0
[dfff80000000002e] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 7191 Comm: syz.4.596 Tainted: G    B        L      syzkaller #0 PREEMPT 
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
pc : atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
pc : dm_kcopyd_client_destroy+0xa4/0x3c4 drivers/md/dm-kcopyd.c:980
lr : instrument_atomic_read include/linux/instrumented.h:82 [inline]
lr : atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
lr : dm_kcopyd_client_destroy+0xa0/0x3c4 drivers/md/dm-kcopyd.c:980
sp : ffff800094747620
x29: ffff8000947476c0 x28: ffff7000128e8efc x27: dfff800000000000
x26: 0000000000000400 x25: 000000000000002e x24: 0000000000000174
x23: dfff800000000000 x22: ffff7000128e8ec4 x21: ffff800094747620
x20: fffffffffffffff4 x19: fffffffffffffff4 x18: 1fffe000349fbc28
x17: 0000000000000003 x16: ffff8000897a7000 x15: ffff8000898576c0
x14: 0000000000000ef0 x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000080000 x9 : 0000000000000000
x8 : 0000000000000000 x7 : 0000000000000000 x6 : ffff800080483084
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3854
x2 : 0000000000000000 x1 : ffff0000d6709d80 x0 : 0000000000000000
Call trace:
 raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline] (P)
 atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline] (P)
 dm_kcopyd_client_destroy+0xa4/0x3c4 drivers/md/dm-kcopyd.c:980 (P)
 __destroy+0x15c/0x2cc drivers/md/dm-cache-target.c:1973
 cache_create drivers/md/dm-cache-target.c:2604 [inline]
 cache_ctr+0xe78/0x1f1c drivers/md/dm-cache-target.c:2649
 dm_table_add_target+0x44c/0xb18 drivers/md/dm-table.c:749
 populate_table drivers/md/dm-ioctl.c:1602 [inline]
 table_load+0x27c/0x764 drivers/md/dm-ioctl.c:1645
 ctl_ioctl drivers/md/dm-ioctl.c:2221 [inline]
 dm_ctl_ioctl+0x884/0xbbc drivers/md/dm-ioctl.c:2243
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __arm64_sys_ioctl+0x154/0x1cc fs/ioctl.c:583
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796
 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606
Code: 52800081 91060278 972cc052 d343ff19 (38f76b28) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	52800081 	mov	w1, #0x4                   	// #4
   4:	91060278 	add	x24, x19, #0x180
   8:	972cc052 	bl	0xfffffffffcb30150
   c:	d343ff19 	lsr	x25, x24, #3
* 10:	38f76b28 	ldrsb	w8, [x25, x23] <-- trapping instruction