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: 19160 Comm: syz-executor.4 Not tainted 5.9.0-rc1-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:ffffc90000007b08 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888214eedc00 RCX: ffffffff871b1133 RDX: 000000000000006a RSI: ffffffff871b12a2 RDI: 0000000000000350 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8880a60f28e3 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888214eedc00 R13: 0000000000000078 R14: ffff888097f596c0 R15: 0000000000000010 FS: 00007f6ca96db700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000052c538 CR3: 000000009f211000 CR4: 00000000001506f0 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:1413 expire_timers kernel/time/timer.c:1458 [inline] __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755 __run_timers kernel/time/timer.c:1736 [inline] run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768 __do_softirq+0x2de/0xa24 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __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+0x9d/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:__sanitizer_cov_trace_pc+0x3c/0x60 kernel/kcov.c:203 Code: 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 24 14 00 00 85 c0 74 2b 8b 82 00 14 00 00 83 f8 02 75 20 48 8b 8a 08 14 00 00 <8b> 92 04 14 00 00 48 8b 01 48 83 c0 01 48 39 c2 76 07 48 89 34 c1 RSP: 0018:ffffc900062872b8 EFLAGS: 00000246 RAX: 0000000000000002 RBX: 0000000000000011 RCX: ffffc90010f0e000 RDX: ffff88805d9e0180 RSI: ffffffff8700006c RDI: 0000000000000001 RBP: ffffc90006287428 R08: 0000000000000001 R09: ffffffff8c5f89e7 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000008 R14: 0000000000000028 R15: ffff888097f59800 nf_ct_frag6_gather+0x14c/0x2180 net/ipv6/netfilter/nf_conntrack_reasm.c:455 ipv6_defrag net/ipv6/netfilter/nf_defrag_ipv6_hooks.c:66 [inline] ipv6_defrag+0x227/0x4c0 net/ipv6/netfilter/nf_defrag_ipv6_hooks.c:51 nf_hook_entry_hookfn include/linux/netfilter.h:136 [inline] nf_hook_slow+0xc5/0x1e0 net/netfilter/core.c:512 nf_hook include/linux/netfilter.h:256 [inline] __ip6_local_out+0x419/0x890 net/ipv6/output_core.c:167 ip6_local_out+0x26/0x1a0 net/ipv6/output_core.c:177 ip6_send_skb+0xb7/0x340 net/ipv6/ip6_output.c:1867 udp_v6_send_skb+0x7c2/0x15d0 net/ipv6/udp.c:1233 udpv6_sendmsg+0x2300/0x2b90 net/ipv6/udp.c:1531 inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:638 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x331/0x810 net/socket.c:2353 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407 __sys_sendmmsg+0x195/0x480 net/socket.c:2497 __do_sys_sendmmsg net/socket.c:2526 [inline] __se_sys_sendmmsg net/socket.c:2523 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2523 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6ca96dac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00000000000279c0 RCX: 000000000045d5b9 RDX: 00000000000004ff RSI: 00000000200092c0 RDI: 0000000000000005 RBP: 000000000118cf88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffcd31ee75f R14: 00007f6ca96db9c0 R15: 000000000118cf4c Modules linked in: ---[ end trace 20bc3db88c3e774c ]--- 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:ffffc90000007b08 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888214eedc00 RCX: ffffffff871b1133 RDX: 000000000000006a RSI: ffffffff871b12a2 RDI: 0000000000000350 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8880a60f28e3 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888214eedc00 R13: 0000000000000078 R14: ffff888097f596c0 R15: 0000000000000010 FS: 00007f6ca96db700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000052c538 CR3: 000000009f211000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400