Oops: general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]
CPU: 0 UID: 0 PID: 9666 Comm: syz.7.11179 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__queue_work+0xa2/0xf90 kernel/workqueue.c:2269
Code: 11 31 ff 89 ee e8 4e f4 37 00 85 ed 0f 85 ef 0c 00 00 e8 01 f0 37 00 4d 8d b7 c0 01 00 00 4c 89 f0 48 c1 e8 03 48 89 44 24 28 <42> 0f b6 04 20 84 c0 0f 85 22 0d 00 00 4c 89 34 24 41 8b 2e 89 ee
RSP: 0018:ffffc900000077f8 EFLAGS: 00010002
RAX: 0000000000000038 RBX: 0000000000000008 RCX: 0000000000040000
RDX: ffffc90002151000 RSI: 0000000000000c15 RDI: 0000000000000c16
RBP: 0000000000000000 R08: ffff88802916c01f R09: 1ffff1100522d803
R10: dffffc0000000000 R11: ffffed100522d804 R12: dffffc0000000000
R13: ffff88802916c018 R14: 00000000000001c0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888125063000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30663fff CR3: 000000000e74a000 CR4: 00000000003526f0
Call Trace:
queue_work_on+0x106/0x1d0 kernel/workqueue.c:2405
qt2_process_read_urb drivers/usb/serial/quatech2.c:541 [inline]
qt2_read_bulk_callback+0xe96/0x1030 drivers/usb/serial/quatech2.c:574
__usb_hcd_giveback_urb+0x376/0x540 drivers/usb/core/hcd.c:1657
dummy_timer+0xbbd/0x45d0 drivers/usb/gadget/udc/dummy_hcd.c:1995
__run_hrtimer kernel/time/hrtimer.c:1785 [inline]
__hrtimer_run_queues+0x529/0xc30 kernel/time/hrtimer.c:1849
hrtimer_run_softirq+0x182/0x5a0 kernel/time/hrtimer.c:1866
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:626
__do_softirq kernel/softirq.c:660 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/0x150 kernel/softirq.c:727
irq_exit_rcu+0x9/0x30 kernel/softirq.c:743
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x221/0x330 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 e1 5d 08 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 fb 8d 9a 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 08 24 94
RSP: 0018:ffffc9000dae7310 EFLAGS: 00000282
RAX: 9550c27fbc898c00 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 00000000b4a7d0bd RSI: ffffffff8e269265 RDI: ffffffff8c294900
RBP: ffffffff823ac014 R08: ffffffff823ac014 R09: ffffffff8e95dee0
R10: dffffc0000000000 R11: fffff94000a78529 R12: 0000000000000002
R13: ffffffff8e95dee0 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
rcu_read_lock include/linux/rcupdate.h:850 [inline]
page_table_check_clear+0x164/0x5f0 mm/page_table_check.c:77
ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:846 [inline]
zap_present_folio_ptes mm/memory.c:1645 [inline]
zap_present_ptes mm/memory.c:1727 [inline]
do_zap_pte_range mm/memory.c:1829 [inline]
zap_pte_range mm/memory.c:1931 [inline]
zap_pmd_range mm/memory.c:2023 [inline]
zap_pud_range mm/memory.c:2051 [inline]
zap_p4d_range mm/memory.c:2072 [inline]
unmap_page_range+0x33b3/0x48f0 mm/memory.c:2093
unmap_single_vma mm/memory.c:2135 [inline]
unmap_vmas+0x48f/0x6a0 mm/memory.c:2173
exit_mmap+0x283/0x9c0 mm/mmap.c:1301
__mmput+0x118/0x430 kernel/fork.c:1174
exit_mm+0x168/0x220 kernel/exit.c:581
do_exit+0x62e/0x2310 kernel/exit.c:959
do_group_exit+0x21b/0x2d0 kernel/exit.c:1112
get_signal+0x1284/0x1330 kernel/signal.c:3034
arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe87df9ab4b
Code: Unable to access opcode bytes at 0x7fe87df9ab21.
RSP: 002b:00007fe87edaef00 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 00007fe87df9ab4b
RDX: 00007fe87edaffd0 RSI: 0000000080085502 RDI: 0000000000000003
RBP: 00007fe87edaffd0 R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000000000000002 R15: 00007fe87e0092e9
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0xa2/0xf90 kernel/workqueue.c:2269
Code: 11 31 ff 89 ee e8 4e f4 37 00 85 ed 0f 85 ef 0c 00 00 e8 01 f0 37 00 4d 8d b7 c0 01 00 00 4c 89 f0 48 c1 e8 03 48 89 44 24 28 <42> 0f b6 04 20 84 c0 0f 85 22 0d 00 00 4c 89 34 24 41 8b 2e 89 ee
RSP: 0018:ffffc900000077f8 EFLAGS: 00010002
RAX: 0000000000000038 RBX: 0000000000000008 RCX: 0000000000040000
RDX: ffffc90002151000 RSI: 0000000000000c15 RDI: 0000000000000c16
RBP: 0000000000000000 R08: ffff88802916c01f R09: 1ffff1100522d803
R10: dffffc0000000000 R11: ffffed100522d804 R12: dffffc0000000000
R13: ffff88802916c018 R14: 00000000000001c0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888125063000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30663fff CR3: 000000000e74a000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 31 ff xor %edi,%edi
2: 89 ee mov %ebp,%esi
4: e8 4e f4 37 00 call 0x37f457
9: 85 ed test %ebp,%ebp
b: 0f 85 ef 0c 00 00 jne 0xd00
11: e8 01 f0 37 00 call 0x37f017
16: 4d 8d b7 c0 01 00 00 lea 0x1c0(%r15),%r14
1d: 4c 89 f0 mov %r14,%rax
20: 48 c1 e8 03 shr $0x3,%rax
24: 48 89 44 24 28 mov %rax,0x28(%rsp)
* 29: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 0f 85 22 0d 00 00 jne 0xd58
36: 4c 89 34 24 mov %r14,(%rsp)
3a: 41 8b 2e mov (%r14),%ebp
3d: 89 ee mov %ebp,%esi