general protection fault, probably for non-canonical address 0xdffffc0000000066: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000330-0x0000000000000337] CPU: 1 PID: 21015 Comm: syz-executor.1 Not tainted 5.8.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ax25_dev_ax25dev include/net/ax25.h:337 [inline] RIP: 0010:ax25_send_frame+0xe4/0x640 net/ax25/ax25_out.c:56 Code: 00 48 85 c0 49 89 c4 0f 85 fb 03 00 00 e8 c4 50 64 fa 49 8d bd 30 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 b1 04 00 00 4d 8b ad 30 03 00 00 4d 85 ed 0f 84 RSP: 0018:ffffc90000da8ad0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a7f5b008 RCX: 1ffffffff155cb92 RDX: 0000000000000066 RSI: ffffffff870eff8c RDI: 0000000000000330 RBP: ffffffff8d4cc180 R08: 0000000000000000 R09: 0000000000000001 R10: fffffbfff18b156d R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000104 R15: 0000000000000000 FS: 0000000002a81940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000073eb94 CR3: 000000008851c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rose_send_frame+0xcc/0x2f0 net/rose/rose_link.c:106 rose_transmit_clear_request+0x1d5/0x290 net/rose/rose_link.c:255 rose_rx_call_request+0x4bd/0x1978 net/rose/af_rose.c:998 rose_loopback_timer+0x15d/0x470 net/rose/rose_loopback.c:100 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers.part.0+0x54c/0xa20 kernel/time/timer.c:1773 __run_timers kernel/time/timer.c:1745 [inline] run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1786 __do_softirq+0x34c/0xa60 kernel/softirq.c:292 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x111/0x170 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:387 [inline] __irq_exit_rcu kernel/softirq.c:417 [inline] irq_exit_rcu+0x229/0x270 kernel/softirq.c:429 sysvec_apic_timer_interrupt+0x12d/0x220 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline] RIP: 0010:lock_is_held_type+0x265/0x360 kernel/locking/lockdep.c:4998 Code: 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 c6 00 00 00 48 83 3d 54 18 d0 01 00 74 32 48 8b 7c 24 10 57 9d <0f> 1f 44 00 00 48 83 c4 18 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc900017e7b38 EFLAGS: 00000286 RAX: 1ffffffff13696a8 RBX: ffff88809adbc040 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: 0000000000000286 RBP: ffff88809adbc040 R08: ffffffff866cf5da R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88809adbc910 R14: 0000000000000040 R15: 0000000000000000 lock_is_held include/linux/lockdep.h:425 [inline] ___might_sleep+0x268/0x2f0 kernel/sched/core.c:6841 __mutex_lock_common kernel/locking/mutex.c:935 [inline] __mutex_lock+0xa9/0x10d0 kernel/locking/mutex.c:1103 nf_sockopt_find.constprop.0+0x2a/0x2a0 net/netfilter/nf_sockopt.c:67 nf_sockopt net/netfilter/nf_sockopt.c:99 [inline] nf_setsockopt+0x26/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x10c/0x170 net/ipv6/ipv6_sockglue.c:905 tcp_setsockopt+0x86/0xd0 net/ipv4/tcp.c:3334 __sys_setsockopt+0x24a/0x480 net/socket.c:2127 __do_sys_setsockopt net/socket.c:2143 [inline] __se_sys_setsockopt net/socket.c:2140 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2140 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45f64a Code: Bad RIP value. RSP: 002b:00007fff8ccd2d58 EFLAGS: 00000202 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fff8ccd2d80 RCX: 000000000045f64a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 0000000000740ca0 R08: 00000000000003b8 R09: 0000000000004000 R10: 000000000073eb40 R11: 0000000000000202 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000029 R15: 000000000073eae0 Modules linked in: ---[ end trace 0cde19172581b9eb ]--- RIP: 0010:ax25_dev_ax25dev include/net/ax25.h:337 [inline] RIP: 0010:ax25_send_frame+0xe4/0x640 net/ax25/ax25_out.c:56 Code: 00 48 85 c0 49 89 c4 0f 85 fb 03 00 00 e8 c4 50 64 fa 49 8d bd 30 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 b1 04 00 00 4d 8b ad 30 03 00 00 4d 85 ed 0f 84 RSP: 0018:ffffc90000da8ad0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a7f5b008 RCX: 1ffffffff155cb92 RDX: 0000000000000066 RSI: ffffffff870eff8c RDI: 0000000000000330 RBP: ffffffff8d4cc180 R08: 0000000000000000 R09: 0000000000000001 R10: fffffbfff18b156d R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000104 R15: 0000000000000000 FS: 0000000002a81940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000073eb94 CR3: 000000008851c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400