general protection fault, probably for non-canonical address 0xdffffc0000000090: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000480-0x0000000000000487] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.15.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:inet_ctl_sock_destroy include/net/inet_common.h:65 [inline] RIP: 0010:icmpv6_sk_exit+0x106/0x1f0 net/ipv6/icmp.c:1038 Code: 42 80 3c 20 00 74 08 48 89 df e8 e5 7a f3 f8 48 8b 1b 48 85 db 74 2d e8 c8 0d a8 f8 48 81 c3 80 04 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 bb 7a f3 f8 48 8b 3b e8 f3 30 25 RSP: 0018:ffffc90000cd7b40 EFLAGS: 00010206 RAX: 0000000000000090 RBX: 0000000000000481 RCX: ffff888012375580 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000008 RBP: ffffffff8c38a7d8 R08: ffffffff88da6485 R09: ffffffff843540e0 R10: 0000000000000009 R11: ffff888012375580 R12: dffffc0000000000 R13: 1ffffffff1bb7fbf R14: ffff88801fcf3fe0 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005606aea732f8 CR3: 000000005c17f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ops_exit_list net/core/net_namespace.c:168 [inline] cleanup_net+0x758/0xc50 net/core/net_namespace.c:591 process_one_work+0x853/0x1140 kernel/workqueue.c:2297 worker_thread+0xac1/0x1320 kernel/workqueue.c:2444 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 Modules linked in: ---[ end trace e9d83564f5107008 ]--- RIP: 0010:inet_ctl_sock_destroy include/net/inet_common.h:65 [inline] RIP: 0010:icmpv6_sk_exit+0x106/0x1f0 net/ipv6/icmp.c:1038 Code: 42 80 3c 20 00 74 08 48 89 df e8 e5 7a f3 f8 48 8b 1b 48 85 db 74 2d e8 c8 0d a8 f8 48 81 c3 80 04 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 bb 7a f3 f8 48 8b 3b e8 f3 30 25 RSP: 0018:ffffc90000cd7b40 EFLAGS: 00010206 RAX: 0000000000000090 RBX: 0000000000000481 RCX: ffff888012375580 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000008 RBP: ffffffff8c38a7d8 R08: ffffffff88da6485 R09: ffffffff843540e0 R10: 0000000000000009 R11: ffff888012375580 R12: dffffc0000000000 R13: 1ffffffff1bb7fbf R14: ffff88801fcf3fe0 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f93fc5792d8 CR3: 000000005c17f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 5: 74 08 je 0xf 7: 48 89 df mov %rbx,%rdi a: e8 e5 7a f3 f8 callq 0xf8f37af4 f: 48 8b 1b mov (%rbx),%rbx 12: 48 85 db test %rbx,%rbx 15: 74 2d je 0x44 17: e8 c8 0d a8 f8 callq 0xf8a80de4 1c: 48 81 c3 80 04 00 00 add $0x480,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 bb 7a f3 f8 callq 0xf8f37af4 39: 48 8b 3b mov (%rbx),%rdi 3c: e8 .byte 0xe8 3d: f3 repz 3e: 30 .byte 0x30 3f: 25 .byte 0x25