general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 46 Comm: kworker/u4:3 Not tainted 6.2.0-rc3-next-20230110-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound io_ring_exit_work RIP: 0010:pn533_out_complete.cold+0x15/0x44 drivers/nfc/pn533/usb.c:441 Code: df e8 aa 07 fa f7 e9 39 ff ff ff 48 89 df e8 9d 07 fa f7 eb e0 e8 d6 19 ac f7 4c 89 ea b8 ff ff 37 00 48 c1 ea 03 48 c1 e0 2a <80> 3c 02 00 75 1f 49 8b 7d 00 44 89 e2 48 c7 c6 80 be d0 8a 48 81 RSP: 0018:ffffc900001e0a58 EFLAGS: 00010086 RAX: dffffc0000000000 RBX: ffff8880224e1d00 RCX: ffffc900022e2000 RDX: 0000000000000000 RSI: ffffffff89d5a3ea RDI: 0000000000000005 RBP: ffffc9000579ee70 R08: 0000000000000005 R09: 0000000000000000 R10: ffffffffffffffb9 R11: 0000000000000001 R12: ffffffffffffffb9 R13: 0000000000000000 R14: 0100000000000005 R15: 00000000ffffffb9 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32e27000 CR3: 0000000036f8e000 CR4: 00000000003506e0 DR0: 00000000400009f9 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: __usb_hcd_giveback_urb+0x2b6/0x5c0 drivers/usb/core/hcd.c:1671 usb_hcd_giveback_urb+0x384/0x430 drivers/usb/core/hcd.c:1754 dummy_timer+0x1203/0x32d0 drivers/usb/gadget/udc/dummy_hcd.c:1988 call_timer_fn+0x1da/0x800 kernel/time/timer.c:1700 expire_timers+0x234/0x330 kernel/time/timer.c:1751 __run_timers kernel/time/timer.c:2022 [inline] __run_timers kernel/time/timer.c:1995 [inline] run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035 __do_softirq+0x1fb/0xaf6 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:kasan_quarantine_put+0x9f/0x220 mm/kasan/quarantine.c:245 Code: 10 48 81 fb 00 00 10 00 48 89 58 10 77 78 4d 85 ed 75 6c 9c 58 f6 c4 02 0f 85 23 01 00 00 4d 85 ed b8 01 00 00 00 74 01 fb 5b <5d> 41 5c 41 5d 41 5e c3 e8 c4 86 b8 ff 48 c7 c3 80 7e 03 00 e8 88 RSP: 0018:ffffc90000b77ac0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: ffffc90000b77b40 RCX: 1ffffffff22781a6 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888021ddd500 R08: 0000000000000001 R09: ffffffff91353c67 R10: 0000000000000001 R11: 0000000000094001 R12: ffff88801bf4d500 R13: 0000000000000200 R14: ffffc90000b77b48 R15: ffff888021ddd500 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] kmem_cache_free+0xec/0x4e0 mm/slub.c:3809 io_req_caches_free+0x1aa/0x1e6 io_uring/io_uring.c:2702 io_ring_exit_work+0x2eb/0xc84 io_uring/io_uring.c:2890 process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293 worker_thread+0x669/0x1090 kernel/workqueue.c:2440 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pn533_out_complete.cold+0x15/0x44 drivers/nfc/pn533/usb.c:441 Code: df e8 aa 07 fa f7 e9 39 ff ff ff 48 89 df e8 9d 07 fa f7 eb e0 e8 d6 19 ac f7 4c 89 ea b8 ff ff 37 00 48 c1 ea 03 48 c1 e0 2a <80> 3c 02 00 75 1f 49 8b 7d 00 44 89 e2 48 c7 c6 80 be d0 8a 48 81 RSP: 0018:ffffc900001e0a58 EFLAGS: 00010086 RAX: dffffc0000000000 RBX: ffff8880224e1d00 RCX: ffffc900022e2000 RDX: 0000000000000000 RSI: ffffffff89d5a3ea RDI: 0000000000000005 RBP: ffffc9000579ee70 R08: 0000000000000005 R09: 0000000000000000 R10: ffffffffffffffb9 R11: 0000000000000001 R12: ffffffffffffffb9 R13: 0000000000000000 R14: 0100000000000005 R15: 00000000ffffffb9 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32e27000 CR3: 0000000036f8e000 CR4: 00000000003506e0 DR0: 00000000400009f9 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 aa 07 fa f7 callq 0xf7fa07af 5: e9 39 ff ff ff jmpq 0xffffff43 a: 48 89 df mov %rbx,%rdi d: e8 9d 07 fa f7 callq 0xf7fa07af 12: eb e0 jmp 0xfffffff4 14: e8 d6 19 ac f7 callq 0xf7ac19ef 19: 4c 89 ea mov %r13,%rdx 1c: b8 ff ff 37 00 mov $0x37ffff,%eax 21: 48 c1 ea 03 shr $0x3,%rdx 25: 48 c1 e0 2a shl $0x2a,%rax * 29: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2d: 75 1f jne 0x4e 2f: 49 8b 7d 00 mov 0x0(%r13),%rdi 33: 44 89 e2 mov %r12d,%edx 36: 48 c7 c6 80 be d0 8a mov $0xffffffff8ad0be80,%rsi 3d: 48 rex.W 3e: 81 .byte 0x81