Oops: general protection fault, probably for non-canonical address 0xdffffc0000000060: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000300-0x0000000000000307]
CPU: 1 UID: 0 PID: 5246 Comm: kworker/1:3 Not tainted 6.14.0-syzkaller-ga2cc6ff5ec8f #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:strcmp+0x5b/0xb0 lib/string.c:277
Code: fa 48 c1 e8 03 83 e2 07 42 0f b6 04 28 38 d0 7f 04 84 c0 75 58 48 89 f0 48 89 f2 0f b6 6b ff 4c 8d 66 01 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 2c 41 3a 6c 24 ff 74 ae 19 c0
RSP: 0018:ffffc900001a89b0 EFLAGS: 00010046
RAX: 0000000000000060 RBX: ffffffff87685941 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff87685940
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88810a7c8020 R12: 0000000000000301
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8e70be30
FS: 0000000000000000(0000) GS:ffff8882692c0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe23b326d58 CR3: 000000010cfd8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
count_matching_names kernel/locking/lockdep.c:880 [inline]
register_lock_class+0x26d/0x4c0 kernel/locking/lockdep.c:1345
__lock_acquire+0x99/0x1ba0 kernel/locking/lockdep.c:5110
lock_acquire kernel/locking/lockdep.c:5866 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
complete_with_flags kernel/sched/completion.c:20 [inline]
complete+0x1d/0x200 kernel/sched/completion.c:47
transfer drivers/usb/gadget/udc/dummy_hcd.c:1523 [inline]
dummy_timer+0x1c53/0x3a20 drivers/usb/gadget/udc/dummy_hcd.c:1978
__run_hrtimer kernel/time/hrtimer.c:1791 [inline]
__hrtimer_run_queues+0x1ff/0xad0 kernel/time/hrtimer.c:1855
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1872
handle_softirqs+0x205/0x8d0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kasan_byte_accessible+0x18/0x30 mm/kasan/generic.c:201
Code: 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ef 03 48 01 c7 0f b6 07 <3c> 07 0f 96 c0 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 0f
RSP: 0018:ffffc900023bf6f8 EFLAGS: 00000286
RAX: 0000000000000000 RBX: ffff88811ec40300 RCX: ffff88811ec40f00
RDX: 0000000000000000 RSI: ffff88811ec40300 RDI: ffffed1023d88060
RBP: ffffffff8494e17c R08: 0000000000000100 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881000413c0
R13: 0000000000112008 R14: ffff8881000413c0 R15: 0000000000000000
check_slab_allocation+0xb2/0x130 mm/kasan/common.c:224
kasan_slab_pre_free include/linux/kasan.h:198 [inline]
slab_free_hook mm/slub.c:2334 [inline]
slab_free mm/slub.c:4646 [inline]
kfree+0xf9/0x470 mm/slub.c:4845
urb_destroy drivers/usb/core/urb.c:27 [inline]
kref_put include/linux/kref.h:65 [inline]
usb_free_urb.part.0+0x9c/0x100 drivers/usb/core/urb.c:97
usb_free_urb+0x1f/0x30 drivers/usb/core/urb.c:96
usb_start_wait_urb+0x1e2/0x4b0 drivers/usb/core/message.c:81
usb_internal_control_msg drivers/usb/core/message.c:103 [inline]
usb_control_msg+0x326/0x4a0 drivers/usb/core/message.c:154
get_port_status drivers/usb/core/hub.c:605 [inline]
hub_ext_port_status+0x14e/0x670 drivers/usb/core/hub.c:622
usb_hub_port_status drivers/usb/core/hub.c:672 [inline]
port_event drivers/usb/core/hub.c:5724 [inline]
hub_event+0x6e4/0x5030 drivers/usb/core/hub.c:5913
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:strcmp+0x5b/0xb0 lib/string.c:277
Code: fa 48 c1 e8 03 83 e2 07 42 0f b6 04 28 38 d0 7f 04 84 c0 75 58 48 89 f0 48 89 f2 0f b6 6b ff 4c 8d 66 01 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 2c 41 3a 6c 24 ff 74 ae 19 c0
RSP: 0018:ffffc900001a89b0 EFLAGS: 00010046
RAX: 0000000000000060 RBX: ffffffff87685941 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff87685940
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88810a7c8020 R12: 0000000000000301
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8e70be30
FS: 0000000000000000(0000) GS:ffff8882692c0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe23b326d58 CR3: 000000010cfd8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: fa cli
1: 48 c1 e8 03 shr $0x3,%rax
5: 83 e2 07 and $0x7,%edx
8: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax
d: 38 d0 cmp %dl,%al
f: 7f 04 jg 0x15
11: 84 c0 test %al,%al
13: 75 58 jne 0x6d
15: 48 89 f0 mov %rsi,%rax
18: 48 89 f2 mov %rsi,%rdx
1b: 0f b6 6b ff movzbl -0x1(%rbx),%ebp
1f: 4c 8d 66 01 lea 0x1(%rsi),%r12
23: 48 c1 e8 03 shr $0x3,%rax
27: 83 e2 07 and $0x7,%edx
* 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction
2f: 38 d0 cmp %dl,%al
31: 7f 04 jg 0x37
33: 84 c0 test %al,%al
35: 75 2c jne 0x63
37: 41 3a 6c 24 ff cmp -0x1(%r12),%bpl
3c: 74 ae je 0xffffffec
3e: 19 c0 sbb %eax,%eax