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: 26338 Comm: syz-executor.5 Not tainted 6.2.0-rc3-syzkaller-00165-gd9fc1511728c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:pn533_out_complete.cold+0x15/0x44 drivers/nfc/pn533/usb.c:441 Code: df e8 ee 50 f7 f7 e9 39 ff ff ff 48 89 df e8 e1 50 f7 f7 eb e0 e8 1a 4e a9 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 00 83 d0 8a 48 81 RSP: 0018:ffffc900001e0a58 EFLAGS: 00010086 RAX: dffffc0000000000 RBX: ffff8880468d5400 RCX: ffffc90002312000 RDX: 0000000000000000 RSI: ffffffff89d80476 RDI: 0000000000000005 RBP: ffffc9000323ee70 R08: 0000000000000005 R09: 0000000000000000 R10: ffffffffffffffb9 R11: 0000000000000001 R12: ffffffffffffffb9 R13: 0000000000000000 R14: 0100000000000002 R15: 00000000ffffffb9 FS: 0000000000000000(0000) GS:ffff8880b9900000(0063) knlGS:00000000f7ef4b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020064018 CR3: 0000000044f08000 CR4: 00000000003506e0 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/0x7c0 kernel/time/timer.c:1700 expire_timers+0x2c6/0x5c0 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/0xadc 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:rcu_read_unlock_sched_notrace include/linux/rcupdate.h:886 [inline] RIP: 0010:trace_kfree include/trace/events/kmem.h:94 [inline] RIP: 0010:kfree+0x131/0x1a0 mm/slab_common.c:1007 Code: ff ff e8 b2 e3 49 ff e9 01 ff ff ff 65 ff 05 ce 0e 4d 7e 48 8b 05 1f c5 a7 0c e8 ea b2 b3 ff 85 c0 74 17 65 ff 0d b7 0e 4d 7e <0f> 85 00 ff ff ff e8 84 e3 49 ff e9 f6 fe ff ff e8 1a 8b 4f 08 85 RSP: 0018:ffffc90015277b00 EFLAGS: 00000286 RAX: 0000000000000001 RBX: 1ffff92002a4ef64 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffc90015277d60 R14: 0000000020083620 R15: 00000000000041ab ___sys_recvmsg+0xff/0x180 net/socket.c:2738 do_recvmmsg+0x554/0x6e0 net/socket.c:2823 __sys_recvmmsg+0x242/0x250 net/socket.c:2910 __do_compat_sys_recvmmsg_time32 net/compat.c:417 [inline] __se_compat_sys_recvmmsg_time32 net/compat.c:413 [inline] __ia32_compat_sys_recvmmsg_time32+0xc6/0x160 net/compat.c:413 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f1a549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7ef45cc EFLAGS: 00000296 ORIG_RAX: 0000000000000151 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200000c0 RDX: 0000000000010106 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pn533_out_complete.cold+0x15/0x44 drivers/nfc/pn533/usb.c:441 Code: df e8 ee 50 f7 f7 e9 39 ff ff ff 48 89 df e8 e1 50 f7 f7 eb e0 e8 1a 4e a9 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 00 83 d0 8a 48 81 RSP: 0018:ffffc900001e0a58 EFLAGS: 00010086 RAX: dffffc0000000000 RBX: ffff8880468d5400 RCX: ffffc90002312000 RDX: 0000000000000000 RSI: ffffffff89d80476 RDI: 0000000000000005 RBP: ffffc9000323ee70 R08: 0000000000000005 R09: 0000000000000000 R10: ffffffffffffffb9 R11: 0000000000000001 R12: ffffffffffffffb9 R13: 0000000000000000 R14: 0100000000000002 R15: 00000000ffffffb9 FS: 0000000000000000(0000) GS:ffff8880b9900000(0063) knlGS:00000000f7ef4b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020064018 CR3: 0000000044f08000 CR4: 00000000003506e0 ---------------- Code disassembly (best guess): 0: df e8 fucomip %st(0),%st 2: ee out %al,(%dx) 3: 50 push %rax 4: f7 f7 div %edi 6: e9 39 ff ff ff jmpq 0xffffff44 b: 48 89 df mov %rbx,%rdi e: e8 e1 50 f7 f7 callq 0xf7f750f4 13: eb e0 jmp 0xfffffff5 15: e8 1a 4e a9 f7 callq 0xf7a94e34 1a: 4c 89 ea mov %r13,%rdx 1d: b8 ff ff 37 00 mov $0x37ffff,%eax 22: 48 c1 ea 03 shr $0x3,%rdx 26: 48 c1 e0 2a shl $0x2a,%rax * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 1f jne 0x4f 30: 49 8b 7d 00 mov 0x0(%r13),%rdi 34: 44 89 e2 mov %r12d,%edx 37: 48 c7 c6 00 83 d0 8a mov $0xffffffff8ad08300,%rsi 3e: 48 rex.W 3f: 81 .byte 0x81