general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 14188 Comm: kworker/u4:44 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: bat_events batadv_nc_worker 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:ffffc90000007a58 EFLAGS: 00010086 RAX: dffffc0000000000 RBX: ffff88801c37b500 RCX: ffffc90002101000 RDX: 0000000000000000 RSI: ffffffff89d5a3ea RDI: 0000000000000005 RBP: ffffc90004b9ee70 R08: 0000000000000005 R09: 0000000000000000 R10: ffffffffffffffb9 R11: 0000000000000001 R12: ffffffffffffffb9 R13: 0000000000000000 R14: 0100000000000002 R15: 00000000ffffffb9 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fc2181d8c8 CR3: 0000000049555000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 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:finish_task_switch.isra.0+0x2bf/0xc80 kernel/sched/core.c:5180 Code: 8b 3a 4c 89 e7 48 c7 02 00 00 00 00 ff d1 4d 85 ff 75 bf 4c 89 e7 e8 10 f8 ff ff e8 2b 38 31 00 fb 65 48 8b 1c 25 80 b8 03 00 <48> 8d bb 50 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffffc900061878f0 EFLAGS: 00000206 RAX: 0000000000d71a6f RBX: ffff888078db3a80 RCX: 1ffffffff2274b16 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90006187938 R08: 0000000000000001 R09: ffffffff91353c1f R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b983c200 R13: ffff8880260b0000 R14: 0000000000000000 R15: ffff8880b983cc38 context_switch kernel/sched/core.c:5304 [inline] __schedule+0x25d8/0x5a70 kernel/sched/core.c:6619 preempt_schedule_irq+0x52/0xa0 kernel/sched/core.c:6931 irqentry_exit+0x35/0x80 kernel/entry/common.c:433 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:lock_acquire.part.0+0x154/0x350 kernel/locking/lockdep.c:5634 Code: b8 ff ff ff ff 65 0f c1 05 69 67 9e 7e 83 f8 01 0f 85 ac 01 00 00 9c 58 f6 c4 02 0f 85 bf 01 00 00 48 85 ed 0f 85 92 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffffc90006187ba0 EFLAGS: 00000206 RAX: 0000000000000046 RBX: 1ffff92000c30f75 RCX: 3e32b3f597131e49 RDX: 1ffff1100f1b6896 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000200 R08: 0000000000000000 R09: ffffffff91353b47 R10: fffffbfff226a768 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8c793fc0 rcu_lock_acquire include/linux/rcupdate.h:327 [inline] rcu_read_lock include/linux/rcupdate.h:773 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0x131/0xfe0 net/batman-adv/network-coding.c:719 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:ffffc90000007a58 EFLAGS: 00010086 RAX: dffffc0000000000 RBX: ffff88801c37b500 RCX: ffffc90002101000 RDX: 0000000000000000 RSI: ffffffff89d5a3ea RDI: 0000000000000005 RBP: ffffc90004b9ee70 R08: 0000000000000005 R09: 0000000000000000 R10: ffffffffffffffb9 R11: 0000000000000001 R12: ffffffffffffffb9 R13: 0000000000000000 R14: 0100000000000002 R15: 00000000ffffffb9 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fc2181d8c8 CR3: 0000000049555000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 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