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: 21 Comm: kworker/u4:1 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_nc_worker 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 78 1a 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: ffff888214c08c08 RCX: 1ffffffff1516a4a RDX: 0000000000000066 RSI: ffffffff87047778 RDI: 0000000000000330 RBP: ffffffff8d25d0c0 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff8c31db57 R11: fffffbfff1863b6a R12: 0000000000000000 R13: 0000000000000104 R14: 0000000000000000 R15: ffff88809f868a40 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000b90004 CR3: 0000000065c71000 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline] RIP: 0010:lock_acquire+0x267/0x8f0 kernel/locking/lockdep.c:4962 Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 c6 05 00 00 48 83 3d 55 e0 3a 08 00 0f 84 65 04 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 08 48 c7 RSP: 0018:ffffc90000dd7bd0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1329638 RBX: ffff8880a97ee580 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 00000000fbda9f2d RDI: 0000000000000282 RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff1863b35 R10: ffffffff8c31d9a7 R11: fffffbfff1863b34 R12: 0000000000000002 R13: ffffffff899be040 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:241 [inline] rcu_read_lock include/linux/rcupdate.h:634 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:407 [inline] batadv_nc_worker+0x114/0x760 net/batman-adv/network-coding.c:718 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 6580a63fbc6b3759 ]--- 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 78 1a 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: ffff888214c08c08 RCX: 1ffffffff1516a4a RDX: 0000000000000066 RSI: ffffffff87047778 RDI: 0000000000000330 RBP: ffffffff8d25d0c0 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff8c31db57 R11: fffffbfff1863b6a R12: 0000000000000000 R13: 0000000000000104 R14: 0000000000000000 R15: ffff88809f868a40 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000b90004 CR3: 0000000065c71000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400