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: 12059 Comm: syz.0.1946 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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: 000000000000020d RDI: 000000000000020e
RBP: 0000000000000000 R08: ffff88801d7dc01f R09: 1ffff11003afb803
R10: dffffc0000000000 R11: ffffed1003afb804 R12: dffffc0000000000
R13: ffff88801d7dc018 R14: 00000000000001c0 R15: 0000000000000000
FS: 00007efcef65f6c0(0000) GS:ffff8881252b4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000340 CR3: 00000000261c8000 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:munlock_vma_folio mm/internal.h:1139 [inline]
RIP: 0010:__folio_remove_rmap mm/rmap.c:1873 [inline]
RIP: 0010:folio_remove_rmap_ptes+0x8d6/0x1050 mm/rmap.c:1890
Code: 40 fd a9 ff 49 bd 00 00 00 00 00 fc ff df eb 05 e8 2f fd a9 ff 48 8b 5c 24 50 48 83 c3 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 90 78 13 00 48 8b 1b 48 89 de 48 81 e6 00 20 00
RSP: 0018:ffffc90004f36308 EFLAGS: 00000246
RAX: 1ffff1100f24d2f4 RBX: ffff8880792697a0 RCX: 0000000080000001
RDX: 0000000000000004 RSI: ffffffff8e14e200 RDI: ffff888033f70000
RBP: 1ffffd40002699ab R08: ffffffff901020b7 R09: 1ffffffff2020416
R10: dffffc0000000000 R11: fffffbfff2020417 R12: 00000000ffffffff
R13: dffffc0000000000 R14: 0000000000000001 R15: ffffea000134cd40
try_to_unmap_one+0x1c40/0x3020 mm/rmap.c:2329
rmap_walk_anon+0x5cb/0x7c0 mm/rmap.c:2976
try_to_unmap+0x1ab/0x230 mm/rmap.c:-1
shrink_folio_list+0x1d2a/0x52b0 mm/vmscan.c:1375
reclaim_folio_list+0x100/0x400 mm/vmscan.c:2205
reclaim_pages+0x45b/0x530 mm/vmscan.c:2242
madvise_cold_or_pageout_pte_range+0x1e2d/0x2220 mm/madvise.c:561
walk_pmd_range mm/pagewalk.c:130 [inline]
walk_pud_range mm/pagewalk.c:224 [inline]
walk_p4d_range mm/pagewalk.c:262 [inline]
walk_pgd_range+0x1032/0x1d30 mm/pagewalk.c:303
__walk_page_range+0x14c/0x710 mm/pagewalk.c:411
walk_page_range_vma_unsafe+0x309/0x410 mm/pagewalk.c:715
madvise_pageout_page_range mm/madvise.c:620 [inline]
madvise_pageout mm/madvise.c:645 [inline]
madvise_vma_behavior+0x3827/0x4270 mm/madvise.c:1364
madvise_walk_vmas+0x573/0xae0 mm/madvise.c:1719
madvise_do_behavior+0x386/0x540 mm/madvise.c:1935
do_madvise+0x1fa/0x2e0 mm/madvise.c:2028
__do_sys_madvise mm/madvise.c:2037 [inline]
__se_sys_madvise mm/madvise.c:2035 [inline]
__x64_sys_madvise+0xa6/0xc0 mm/madvise.c:2035
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efcee79aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efcef65f028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007efceea16180 RCX: 00007efcee79aeb9
RDX: 0000000000000015 RSI: 0000000000600000 RDI: 0000200000000000
RBP: 00007efcee808c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efceea16218 R14: 00007efceea16180 R15: 00007ffd3bfc7068
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: 000000000000020d RDI: 000000000000020e
RBP: 0000000000000000 R08: ffff88801d7dc01f R09: 1ffff11003afb803
R10: dffffc0000000000 R11: ffffed1003afb804 R12: dffffc0000000000
R13: ffff88801d7dc018 R14: 00000000000001c0 R15: 0000000000000000
FS: 00007efcef65f6c0(0000) GS:ffff8881252b4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000340 CR3: 00000000261c8000 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