general protection fault, probably for non-canonical address 0xdffffc000000006a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000350-0x0000000000000357] CPU: 1 PID: 19137 Comm: syz-executor.3 Not tainted 5.7.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101 Code: 48 c1 ea 03 80 3c 02 00 0f 85 06 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 8d bd 50 03 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ea 00 00 00 4c 8b bd 50 03 00 00 e9 77 fe ff ff RSP: 0018:ffffc90000da8b00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a8ccb400 RCX: ffffffff86fc24b3 RDX: 000000000000006a RSI: ffffffff86fc2622 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff88805be6e4c0 R09: ffffed1006a41f1d R10: ffff88803520f8e3 R11: ffffed1006a41f1c R12: ffff8880a8ccb400 R13: 0000000000000078 R14: ffff88809efa8d40 R15: 0000000000000010 FS: 000000000106a940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fce48269db8 CR3: 0000000043329000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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:1140 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x8c/0xe0 kernel/locking/spinlock.c:191 Code: 48 c7 c0 60 c0 94 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 37 48 83 3d 3b 87 c1 01 00 74 22 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 15 d0 7b f9 65 8b 05 86 e5 2e 78 RSP: 0018:ffffc900069cfc20 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff132980c RBX: 0000000000000286 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000286 RBP: ffff8880352be970 R08: ffff88805be6e4c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff92000d39f8c R13: ffff8880352be180 R14: ffff8880352be970 R15: ffff8880ae737c98 task_rq_unlock kernel/sched/sched.h:1239 [inline] wake_up_new_task+0x605/0xa70 kernel/sched/core.c:2962 _do_fork+0x240/0x1010 kernel/fork.c:2454 __do_sys_clone+0xef/0x150 kernel/fork.c:2586 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45f3f9 Code: ff 48 85 f6 0f 84 37 8d fb ff 48 83 ee 10 48 89 4e 08 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 38 00 00 00 0f 05 <48> 85 c0 0f 8c 0e 8d fb ff 74 01 c3 31 ed 48 f7 c7 00 00 01 00 75 RSP: 002b:00007ffc9c674dc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fce4826a700 RCX: 000000000045f3f9 RDX: 00007fce4826a9d0 RSI: 00007fce48269db0 RDI: 00000000003d0f00 RBP: 00007ffc9c674ff0 R08: 00007fce4826a700 R09: 00007fce4826a700 R10: 00007fce4826a9d0 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffc9c674e7f R14: 00007fce4826a9c0 R15: 000000000078bf0c Modules linked in: ---[ end trace 9a5e02a0279c62dd ]--- RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101 Code: 48 c1 ea 03 80 3c 02 00 0f 85 06 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 8d bd 50 03 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ea 00 00 00 4c 8b bd 50 03 00 00 e9 77 fe ff ff RSP: 0018:ffffc90000da8b00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a8ccb400 RCX: ffffffff86fc24b3 RDX: 000000000000006a RSI: ffffffff86fc2622 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff88805be6e4c0 R09: ffffed1006a41f1d R10: ffff88803520f8e3 R11: ffffed1006a41f1c R12: ffff8880a8ccb400 R13: 0000000000000078 R14: ffff88809efa8d40 R15: 0000000000000010 FS: 000000000106a940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fce48269db8 CR3: 0000000043329000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400