general protection fault, probably for non-canonical address 0xdffffc000000004b: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000258-0x000000000000025f] CPU: 0 PID: 3615 Comm: kworker/0:3 Not tainted 5.16.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: mld mld_dad_work RIP: 0010:dev_index_hash net/core/dev.c:216 [inline] RIP: 0010:dev_get_by_index_rcu+0x28/0x140 net/core/dev.c:801 Code: 00 00 41 55 41 54 55 89 f5 53 48 89 fb e8 60 9c 4c fa 48 8d bb 58 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 fc 00 00 00 48 8b 93 58 02 00 00 40 0f b6 c5 48 RSP: 0018:ffffc90000007740 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: 000000000000004b RSI: ffffffff872af640 RDI: 0000000000000258 RBP: 0000000000000003 R08: 0000000000000000 R09: ffffffff8ff9ba87 R10: ffffffff8737c18d R11: 0000000000000001 R12: ffff888022e75100 R13: 0000000000000003 R14: 000000000000010e R15: ffff88801dc9abf6 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f84c7263eb0 CR3: 000000007f785000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ____bpf_clone_redirect net/core/filter.c:2409 [inline] bpf_clone_redirect+0x91/0x420 net/core/filter.c:2400 bpf_prog_bebbfe2050753572+0x56/0xcb8 __bpf_prog_run include/linux/filter.h:626 [inline] bpf_prog_run_xdp include/linux/filter.h:801 [inline] veth_xdp_rcv_skb+0x64e/0x1bc0 drivers/net/veth.c:768 veth_xdp_rcv+0x39b/0x9a0 drivers/net/veth.c:874 veth_poll+0x134/0x850 drivers/net/veth.c:910 __napi_poll+0xaf/0x440 net/core/dev.c:6364 napi_poll net/core/dev.c:6431 [inline] net_rx_action+0x801/0xb40 net/core/dev.c:6518 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 do_softirq.part.0+0xde/0x130 kernel/softirq.c:459 do_softirq kernel/softirq.c:451 [inline] __local_bh_enable_ip+0x102/0x120 kernel/softirq.c:383 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:758 [inline] ip6_finish_output2+0x5bc/0x14f0 net/ipv6/ip6_output.c:127 __ip6_finish_output net/ipv6/ip6_output.c:191 [inline] __ip6_finish_output+0x61e/0xe80 net/ipv6/ip6_output.c:170 ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224 dst_output include/net/dst.h:451 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] mld_sendpack+0x9a1/0xe40 net/ipv6/mcast.c:1826 mld_send_initial_cr.part.0+0x194/0x230 net/ipv6/mcast.c:2245 mld_send_initial_cr net/ipv6/mcast.c:1232 [inline] mld_dad_work+0x1d3/0x690 net/ipv6/mcast.c:2268 process_one_work+0x9b2/0x1660 kernel/workqueue.c:2298 worker_thread+0x65d/0x1130 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace 49f66d9dc53d893e ]--- RIP: 0010:dev_index_hash net/core/dev.c:216 [inline] RIP: 0010:dev_get_by_index_rcu+0x28/0x140 net/core/dev.c:801 Code: 00 00 41 55 41 54 55 89 f5 53 48 89 fb e8 60 9c 4c fa 48 8d bb 58 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 fc 00 00 00 48 8b 93 58 02 00 00 40 0f b6 c5 48 RSP: 0018:ffffc90000007740 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: 000000000000004b RSI: ffffffff872af640 RDI: 0000000000000258 RBP: 0000000000000003 R08: 0000000000000000 R09: ffffffff8ff9ba87 R10: ffffffff8737c18d R11: 0000000000000001 R12: ffff888022e75100 R13: 0000000000000003 R14: 000000000000010e R15: ffff88801dc9abf6 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f84c7263eb0 CR3: 000000007f785000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 41 55 push %r13 4: 41 54 push %r12 6: 55 push %rbp 7: 89 f5 mov %esi,%ebp 9: 53 push %rbx a: 48 89 fb mov %rdi,%rbx d: e8 60 9c 4c fa callq 0xfa4c9c72 12: 48 8d bb 58 02 00 00 lea 0x258(%rbx),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 fc 00 00 00 jne 0x130 34: 48 8b 93 58 02 00 00 mov 0x258(%rbx),%rdx 3b: 40 0f b6 c5 movzbl %bpl,%eax 3f: 48 rex.W