general protection fault, probably for non-canonical address 0xdffffc0000000066: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000330-0x0000000000000337] CPU: 0 PID: 43 Comm: kworker/u4:3 Not tainted 5.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_tt_purge RIP: 0010:ax25_send_frame+0xe1/0x660 net/ax25/ax25_out.c:56 Code: c6 00 00 48 85 c0 0f 85 0c 04 00 00 e8 e8 1c 6f fa 49 8d bc 24 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 d2 04 00 00 49 8b 84 24 30 03 00 00 48 85 c0 48 RSP: 0018:ffffc90000007ab8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a8f62c08 RCX: 1ffffffff1516a22 RDX: 0000000000000066 RSI: ffffffff87047508 RDI: 0000000000000330 RBP: ffffffff8d25d100 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff8c31db2f R11: fffffbfff1863b65 R12: 0000000000000000 R13: 0000000000000104 R14: 0000000000000000 R15: ffff8880588d8900 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000ca3b72 CR3: 000000006d1d9000 CR4: 00000000001406f0 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+0x1de/0x290 net/rose/rose_link.c:255 rose_rx_call_request+0x488/0x1960 net/rose/af_rose.c:996 rose_loopback_timer+0x15d/0x470 net/rose/rose_loopback.c:100 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x623/0x1600 kernel/time/timer.c:1786 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x192/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x19e/0x600 arch/x86/kernel/apic/apic.c:1107 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:should_resched arch/x86/include/asm/preempt.h:102 [inline] RIP: 0010:__local_bh_enable_ip+0x18d/0x270 kernel/softirq.c:196 Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 dd 00 00 00 48 83 3d c0 7e 4e 08 00 0f 84 8d 00 00 00 fb 66 0f 1f 44 00 00 <65> 8b 05 a4 eb bb 7e 85 c0 74 7d 5b 5d 41 5c c3 80 3d 9c 2b 40 09 RSP: 0018:ffffc90000f07c90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff132963a RBX: 0000000000000201 RCX: 1ffffffff1516a22 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8880a9176dc0 RBP: ffffffff87c3d086 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff8c31da97 R11: fffffbfff1863b52 R12: ffff8880a9176540 R13: ffff88808936af80 R14: ffff8880a29aa6c0 R15: 00000000000002be spin_unlock_bh include/linux/spinlock.h:398 [inline] batadv_tt_global_purge net/batman-adv/translation-table.c:2531 [inline] batadv_tt_purge+0x346/0xa30 net/batman-adv/translation-table.c:3802 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Modules linked in: ---[ end trace 19538e0ec144416f ]--- RIP: 0010:ax25_send_frame+0xe1/0x660 net/ax25/ax25_out.c:56 Code: c6 00 00 48 85 c0 0f 85 0c 04 00 00 e8 e8 1c 6f fa 49 8d bc 24 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 d2 04 00 00 49 8b 84 24 30 03 00 00 48 85 c0 48 RSP: 0018:ffffc90000007ab8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a8f62c08 RCX: 1ffffffff1516a22 RDX: 0000000000000066 RSI: ffffffff87047508 RDI: 0000000000000330 RBP: ffffffff8d25d100 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff8c31db2f R11: fffffbfff1863b65 R12: 0000000000000000 R13: 0000000000000104 R14: 0000000000000000 R15: ffff8880588d8900 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000ca3b72 CR3: 000000006d1d9000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400