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: 6987 Comm: syz-executor.1 Not tainted 5.8.0-rc4-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:ffffc90000da8b18 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a7c96800 RCX: ffffffff87115de3 RDX: 000000000000006a RSI: ffffffff87115f52 RDI: 0000000000000350 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88805abda4e3 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a7c96800 R13: 0000000000000078 R14: ffff88805b10b840 R15: 0000000000000010 FS: 0000000002667940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc16953db0 CR3: 000000006f637000 CR4: 00000000001406e0 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+0x54/0x120 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587 RIP: 0010:compound_head include/linux/page-flags.h:184 [inline] RIP: 0010:get_page include/linux/mm.h:1132 [inline] RIP: 0010:copy_one_pte mm/memory.c:801 [inline] RIP: 0010:copy_pte_range mm/memory.c:850 [inline] RIP: 0010:copy_pmd_range mm/memory.c:901 [inline] RIP: 0010:copy_pud_range mm/memory.c:935 [inline] RIP: 0010:copy_p4d_range mm/memory.c:957 [inline] RIP: 0010:copy_page_range+0xf4e/0x2750 mm/memory.c:1019 Code: 0f 84 7a 01 00 00 e8 a1 81 cf ff 48 8d 43 08 48 89 84 24 e8 00 00 00 48 c1 e8 03 42 80 3c 28 00 0f 85 87 14 00 00 48 8b 43 08 <31> ff 49 89 de 48 89 c5 48 89 84 24 d8 00 00 00 83 e5 01 48 89 ee RSP: 0018:ffffc90002b27870 EFLAGS: 00000246 RAX: dead000000000100 RBX: ffffea00022eb900 RCX: ffffffff81a2e901 RDX: ffff88806f662040 RSI: ffffffff81a4294f RDI: 0000000000000006 RBP: 0000000000000028 R08: 0000000000000000 R09: ffffea00027cb787 R10: 000000000021ffff R11: 0000000000000000 R12: 800000008bae4007 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000008 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:2094 _do_fork+0x12c/0xa70 kernel/fork.c:2439 __do_sys_clone+0xef/0x150 kernel/fork.c:2595 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45a80a Code: Bad RIP value. RSP: 002b:00007ffc5cb28610 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc5cb28610 RCX: 000000000045a80a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc5cb28650 R08: 0000000000000001 R09: 0000000002667940 R10: 0000000002667c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffc5cb286a0 Modules linked in: ---[ end trace 8fee021eecee18f4 ]--- 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:ffffc90000da8b18 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a7c96800 RCX: ffffffff87115de3 RDX: 000000000000006a RSI: ffffffff87115f52 RDI: 0000000000000350 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88805abda4e3 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a7c96800 R13: 0000000000000078 R14: ffff88805b10b840 R15: 0000000000000010 FS: 0000000002667940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc16953db0 CR3: 000000006f637000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400