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: 7387 Comm: syz-executor.5 Not tainted 5.7.0-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:ffffc90000007b00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a7900800 RCX: ffffffff87033263 RDX: 000000000000006a RSI: ffffffff870333d2 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff888061032040 R09: ffffed100b61121d R10: ffff88805b0890e3 R11: ffffed100b61121c R12: ffff8880a7900800 R13: 0000000000000078 R14: ffff8880554cb2c0 R15: 0000000000000010 FS: 0000000001b83940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000ca3b72 CR3: 0000000061003000 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:1107 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:__read_once_size include/linux/compiler.h:252 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:155 [inline] RIP: 0010:write_comp_data+0x17/0x70 kernel/kcov.c:208 Code: d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 65 4c 8b 04 25 00 1f 02 00 65 8b 05 78 8c 8e 7e a9 00 01 ff 00 75 51 <41> 8b 80 e0 13 00 00 83 f8 03 75 45 49 8b 80 e8 13 00 00 45 8b 80 RSP: 0018:ffffc90007a2f848 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000080000002 RBX: 8000000000000007 RCX: ffffffff81a320b7 RDX: 0000000000000028 RSI: 0000000000000020 RDI: 0000000000000007 RBP: 00000000180400fb R08: ffff888061032040 R09: fffff94000310a19 R10: ffffea00018850c7 R11: fffff94000310a18 R12: 0000000000000010 R13: 0000000000000028 R14: dffffc0000000000 R15: 00007f9b20da0000 copy_one_pte mm/memory.c:779 [inline] copy_pte_range mm/memory.c:851 [inline] copy_pmd_range mm/memory.c:902 [inline] copy_pud_range mm/memory.c:936 [inline] copy_p4d_range mm/memory.c:958 [inline] copy_page_range+0xc17/0x1fc0 mm/memory.c:1020 dup_mmap kernel/fork.c:610 [inline] dup_mm+0x9a4/0x1300 kernel/fork.c:1372 copy_mm kernel/fork.c:1428 [inline] copy_process+0x29cc/0x7110 kernel/fork.c:2099 _do_fork+0x12d/0x1010 kernel/fork.c:2444 __do_sys_clone+0xef/0x150 kernel/fork.c:2600 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45b08a Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 RSP: 002b:00007ffc9ae05ea0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc9ae05ea0 RCX: 000000000045b08a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc9ae05ee0 R08: 0000000000000001 R09: 0000000001b83940 R10: 0000000001b83c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffc9ae05f30 Modules linked in: ---[ end trace c4ac1ae1382e9c17 ]--- 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:ffffc90000007b00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a7900800 RCX: ffffffff87033263 RDX: 000000000000006a RSI: ffffffff870333d2 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff888061032040 R09: ffffed100b61121d R10: ffff88805b0890e3 R11: ffffed100b61121c R12: ffff8880a7900800 R13: 0000000000000078 R14: ffff8880554cb2c0 R15: 0000000000000010 FS: 0000000001b83940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000ca3b72 CR3: 0000000061003000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400