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: 7161 Comm: syz-executor.3 Not tainted 5.8.0-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:ffffc90000007b18 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888214dd5c00 RCX: ffffffff870e00d3 RDX: 000000000000006a RSI: ffffffff870e0242 RDI: 0000000000000350 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88809064b4e3 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888214dd5c00 R13: 0000000000000078 R14: ffff8880a79d6c00 R15: 0000000000000010 FS: 00000000023e9940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000ca3b72 CR3: 0000000067ec7000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rose_transmit_clear_request+0x1d5/0x290 net/rose/rose_link.c:255 rose_rx_call_request+0x4bd/0x1978 net/rose/af_rose.c:998 rose_loopback_timer+0x15d/0x470 net/rose/rose_loopback.c:100 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers.part.0+0x54c/0xa20 kernel/time/timer.c:1773 __run_timers kernel/time/timer.c:1745 [inline] run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1786 __do_softirq+0x34c/0xa60 kernel/softirq.c:292 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x111/0x170 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:387 [inline] __irq_exit_rcu kernel/softirq.c:417 [inline] irq_exit_rcu+0x229/0x270 kernel/softirq.c:429 sysvec_apic_timer_interrupt+0x12d/0x220 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 RIP: 0010:__sanitizer_cov_trace_cmp8+0x0/0x20 kernel/kcov.c:264 Code: 66 2e 0f 1f 84 00 00 00 00 00 48 8b 0c 24 89 f2 89 fe bf 04 00 00 00 e9 2e ff ff ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 <48> 8b 0c 24 48 89 f2 48 89 fe bf 06 00 00 00 e9 0c ff ff ff 66 90 RSP: 0018:ffffc900052477d0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000068696 RCX: ffffffff81a269d5 RDX: ffff888067ed6100 RSI: 0000000000068696 RDI: 000000000021ffff RBP: 1ffff92000a48efb R08: 0000000000000000 R09: ffffea0001a1a547 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a4600c60 R13: 00007f6594103000 R14: 000000000021ffff R15: 0000000000000000 vm_normal_page+0x201/0x380 mm/memory.c:633 copy_one_pte mm/memory.c:799 [inline] copy_pte_range mm/memory.c:850 [inline] copy_pmd_range mm/memory.c:901 [inline] copy_pud_range mm/memory.c:935 [inline] copy_p4d_range mm/memory.c:957 [inline] copy_page_range+0xf1e/0x2750 mm/memory.c:1019 dup_mmap kernel/fork.c:609 [inline] dup_mm+0x98f/0x1300 kernel/fork.c:1371 copy_mm kernel/fork.c:1427 [inline] copy_process+0x2aa2/0x6d90 kernel/fork.c:2098 _do_fork+0x12c/0xa70 kernel/fork.c:2443 __do_sys_clone+0xef/0x150 kernel/fork.c:2599 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45b14a Code: Bad RIP value. RSP: 002b:00007ffce158b8c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffce158b8c0 RCX: 000000000045b14a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffce158b900 R08: 0000000000000001 R09: 00000000023e9940 R10: 00000000023e9c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffce158b950 Modules linked in: ---[ end trace 4fe8c72f5b4d16e0 ]--- 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:ffffc90000007b18 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888214dd5c00 RCX: ffffffff870e00d3 RDX: 000000000000006a RSI: ffffffff870e0242 RDI: 0000000000000350 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88809064b4e3 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888214dd5c00 R13: 0000000000000078 R14: ffff8880a79d6c00 R15: 0000000000000010 FS: 00000000023e9940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000ca3b72 CR3: 0000000067ec7000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400