general protection fault, probably for non-canonical address 0xdffffc000000006a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000350-0x0000000000000357] CPU: 0 PID: 11477 Comm: systemd-udevd Not tainted 5.7.0-rc7-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: 0000:ffffc90000007b00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888099ec4400 RCX: ffffffff86fecf03 RDX: 000000000000006a RSI: ffffffff86fed072 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff88809d6ca040 R09: ffffed100d2f559d R10: ffff8880697aace3 R11: ffffed100d2f559c R12: ffff888099ec4400 R13: 0000000000000078 R14: ffff88809b184500 R15: 0000000000000010 FS: 00007f05c71338c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdbfcd9cb8 CR3: 00000000537a6000 CR4: 00000000001406f0 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: 0033:0x7f05c5fa6295 Code: 00 00 00 e8 5d 01 00 00 48 83 c4 18 c3 0f 1f 84 00 00 00 00 00 83 ff 01 48 89 f0 77 30 48 89 c7 48 89 d6 b8 04 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 03 f3 c3 90 48 8b 15 d1 db 2b 00 f7 d8 64 89 RSP: 002b:00007ffc7b695258 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000124 RCX: 00007f05c5fa6295 RDX: 00007ffc7b695260 RSI: 00007ffc7b695260 RDI: 00007ffc7b695310 RBP: 00007ffc7b695390 R08: 000000000000c0c0 R09: 0000000000000000 R10: 00007ffc7b6953c0 R11: 0000000000000246 R12: 00007ffc7b6953c0 R13: 00007ffc7b6953c0 R14: 000055dfc9034a90 R15: 000000000000000e Modules linked in: ---[ end trace a26339fb79ec2012 ]--- 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: 0000:ffffc90000007b00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888099ec4400 RCX: ffffffff86fecf03 RDX: 000000000000006a RSI: ffffffff86fed072 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff88809d6ca040 R09: ffffed100d2f559d R10: ffff8880697aace3 R11: ffffed100d2f559c R12: ffff888099ec4400 R13: 0000000000000078 R14: ffff88809b184500 R15: 0000000000000010 FS: 00007f05c71338c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdbfcd9cb8 CR3: 00000000537a6000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400