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: 11024 Comm: syz-executor.4 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: 0000:ffffc90000007b00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888214c1fc00 RCX: ffffffff870334d3 RDX: 000000000000006a RSI: ffffffff87033642 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff88804719a500 R09: ffffed1009e9d31d R10: ffff88804f4e98e3 R11: ffffed1009e9d31c R12: ffff888214c1fc00 R13: 0000000000000078 R14: ffff88809392d800 R15: 0000000000000010 FS: 0000000002be8940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000401cb0 CR3: 000000004ea53000 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:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:187 Code: 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 65 48 8b 04 25 00 1f 02 00 65 8b 15 c8 8c 8e 7e 81 e2 00 01 ff 00 48 8b 34 24 75 2b <8b> 90 e0 13 00 00 83 fa 02 75 20 48 8b 88 e8 13 00 00 8b 80 e4 13 RSP: 0000:ffffc90008767bb0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88804719a500 RBX: 0000000000000001 RCX: ffffffff8192472a RDX: 0000000000000000 RSI: ffffffff81924737 RDI: 0000000000000001 RBP: ffffea00022fee80 R08: ffff88804719a500 R09: fffff9400045fdd1 R10: ffffea00022fee87 R11: fffff9400045fdd0 R12: 0000000000000000 R13: ffffea00023d9b48 R14: ffffea00023d9b48 R15: ffffea00022fee88 unlock_page+0x157/0x2a0 mm/filemap.c:1294 filemap_map_pages+0x1065/0x12e0 mm/filemap.c:2641 do_fault_around mm/memory.c:3817 [inline] do_read_fault mm/memory.c:3851 [inline] do_fault mm/memory.c:3985 [inline] handle_pte_fault mm/memory.c:4225 [inline] __handle_mm_fault+0x2ab0/0x3aa0 mm/memory.c:4357 handle_mm_fault+0x1a5/0x660 mm/memory.c:4394 do_user_addr_fault arch/x86/mm/fault.c:1301 [inline] do_page_fault+0x56a/0x13d4 arch/x86/mm/fault.c:1390 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1203 RIP: 0033:0x401cb0 Code: 48 8d 44 24 20 c7 44 24 04 30 00 00 00 48 89 44 24 10 e8 33 e7 05 00 48 8b 3d b4 08 34 00 e8 17 52 02 00 eb 99 e8 c0 ea 05 00 <41> 56 41 55 41 54 55 49 89 fc 53 48 81 ec e0 04 00 00 84 c0 48 89 RSP: 002b:00007ffd35456c18 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000045c7f7 RDX: 00007ffd35456cb3 RSI: 00000000004c25d2 RDI: 00000000004c25d7 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013 R10: 0000000000000075 R11: 0000000000000206 R12: 0000000000000001 R13: 00007ffd35456c50 R14: 0000000000000000 R15: 00007ffd35456c60 Modules linked in: ---[ end trace 811afd4af3dff8b6 ]--- 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: ffff888214c1fc00 RCX: ffffffff870334d3 RDX: 000000000000006a RSI: ffffffff87033642 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff88804719a500 R09: ffffed1009e9d31d R10: ffff88804f4e98e3 R11: ffffed1009e9d31c R12: ffff888214c1fc00 R13: 0000000000000078 R14: ffff88809392d800 R15: 0000000000000010 FS: 0000000002be8940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000401cb0 CR3: 000000004ea53000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400