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: 7041 Comm: syz-executor.0 Not tainted 5.7.0-rc2-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: ffff888214cb0400 RCX: ffffffff86faf4c3 RDX: 000000000000006a RSI: ffffffff86faf632 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff88809ea88200 R09: ffffed10132c099d R10: ffff888099604ce3 R11: ffffed10132c099c R12: ffff888214cb0400 R13: 0000000000000078 R14: ffff8880a8c0f180 R15: 0000000000000010 FS: 0000000002040940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020400000 CR3: 000000009977d000 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:976 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x4b/0x80 kernel/locking/spinlock.c:199 Code: c0 30 c0 94 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d fe 60 c3 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 1b a4 7d f9 65 8b 05 7c bf 30 78 85 c0 74 02 5d RSP: 0018:ffffc900053c7b38 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1329806 RBX: ffff88809ea88200 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff88809ea88ac4 RBP: ffff8880ae737980 R08: ffff88809ea88200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae737980 R13: ffff888062b26500 R14: 0000000000000000 R15: 0000000000000001 finish_lock_switch kernel/sched/core.c:3105 [inline] finish_task_switch+0x147/0x750 kernel/sched/core.c:3205 context_switch kernel/sched/core.c:3369 [inline] __schedule+0x93f/0x1ff0 kernel/sched/core.c:4082 schedule+0xd0/0x2a0 kernel/sched/core.c:4157 freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x21f/0x640 kernel/time/hrtimer.c:1879 hrtimer_nanosleep+0x1df/0x3a0 kernel/time/hrtimer.c:1932 __do_sys_nanosleep kernel/time/hrtimer.c:1966 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1953 [inline] __x64_sys_nanosleep+0x1dc/0x260 kernel/time/hrtimer.c:1953 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ad30 Code: c0 5b 5d c3 66 0f 1f 44 00 00 8b 04 24 48 83 c4 18 5b 5d c3 66 0f 1f 44 00 00 83 3d 21 dc 84 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 d1 fb ff c3 48 83 ec 08 e8 8a 46 00 00 RSP: 002b:00007ffe8f55dcb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 0000000000080fe3 RCX: 000000000045ad30 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe8f55dcc0 RBP: 0000000000000354 R08: 0000000000000001 R09: 0000000002040940 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000c R13: 00007ffe8f55dd10 R14: 0000000000080f17 R15: 00007ffe8f55dd20 Modules linked in: ---[ end trace a89f693137369587 ]--- 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: ffff888214cb0400 RCX: ffffffff86faf4c3 RDX: 000000000000006a RSI: ffffffff86faf632 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff88809ea88200 R09: ffffed10132c099d R10: ffff888099604ce3 R11: ffffed10132c099c R12: ffff888214cb0400 R13: 0000000000000078 R14: ffff8880a8c0f180 R15: 0000000000000010 FS: 0000000002040940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020400000 CR3: 000000009977d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400