general protection fault, probably for non-canonical address 0xfbd59c0000000007: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0xdead000000000038-0xdead00000000003f] CPU: 0 PID: 1275 Comm: kworker/0:3 Not tainted 5.15.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: mld mld_ifc_work RIP: 0010:__ipv6_get_lladdr+0xa8/0x230 net/ipv6/addrconf.c:1847 Code: 01 00 00 48 8b 83 60 01 00 00 48 8d 98 a8 fe ff ff 49 39 c6 0f 84 30 01 00 00 e8 63 00 9c f9 48 8d 7b 72 48 89 f8 48 c1 e8 03 <42> 0f b6 14 28 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 RSP: 0018:ffffc9000546fa08 EFLAGS: 00010a03 RAX: 1bd5a00000000007 RBX: deacffffffffffca RCX: 0000000000000000 RDX: ffff88801d8b8000 RSI: ffffffff87d9fe1d RDI: dead00000000003c RBP: ffffc9000546fa38 R08: 0000000000000000 R09: 0000000000000020 R10: ffffffff87d9feb7 R11: 0000000000000020 R12: 0000000000000040 R13: dffffc0000000000 R14: ffff88807b1dc008 R15: 0000000000000040 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe5c552df60 CR3: 0000000027dfd000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mld_newpack+0x3ad/0x770 net/ipv6/mcast.c:1762 add_grhead+0x265/0x330 net/ipv6/mcast.c:1857 add_grec+0x1053/0x14e0 net/ipv6/mcast.c:1995 mld_send_cr net/ipv6/mcast.c:2082 [inline] mld_ifc_work+0x5d6/0xdc0 net/ipv6/mcast.c:2659 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace 75de88b0ae9c42b0 ]--- RIP: 0010:__ipv6_get_lladdr+0xa8/0x230 net/ipv6/addrconf.c:1847 Code: 01 00 00 48 8b 83 60 01 00 00 48 8d 98 a8 fe ff ff 49 39 c6 0f 84 30 01 00 00 e8 63 00 9c f9 48 8d 7b 72 48 89 f8 48 c1 e8 03 <42> 0f b6 14 28 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 RSP: 0018:ffffc9000546fa08 EFLAGS: 00010a03 RAX: 1bd5a00000000007 RBX: deacffffffffffca RCX: 0000000000000000 RDX: ffff88801d8b8000 RSI: ffffffff87d9fe1d RDI: dead00000000003c RBP: ffffc9000546fa38 R08: 0000000000000000 R09: 0000000000000020 R10: ffffffff87d9feb7 R11: 0000000000000020 R12: 0000000000000040 R13: dffffc0000000000 R14: ffff88807b1dc008 R15: 0000000000000040 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f00e24b5018 CR3: 0000000027ff9000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: 48 8b 83 60 01 00 00 mov 0x160(%rbx),%rax 9: 48 8d 98 a8 fe ff ff lea -0x158(%rax),%rbx 10: 49 39 c6 cmp %rax,%r14 13: 0f 84 30 01 00 00 je 0x149 19: e8 63 00 9c f9 callq 0xf99c0081 1e: 48 8d 7b 72 lea 0x72(%rbx),%rdi 22: 48 89 f8 mov %rdi,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 0f b6 14 28 movzbl (%rax,%r13,1),%edx <-- trapping instruction 2e: 48 89 f8 mov %rdi,%rax 31: 83 e0 07 and $0x7,%eax 34: 83 c0 01 add $0x1,%eax 37: 38 d0 cmp %dl,%al 39: 7c 08 jl 0x43 3b: 84 d2 test %dl,%dl 3d: 0f .byte 0xf 3e: 85 .byte 0x85