netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8790 Comm: syz-executor.2 Not tainted 5.16.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:netem_enqueue+0x2982/0x3800 net/sched/sch_netem.c:516 Code: 44 8b 63 70 48 89 5c 24 20 4c 8d 6b 74 4c 89 e9 48 c1 e9 03 8a 14 31 84 d2 48 8b 4c 24 10 0f 85 e3 07 00 00 45 2b 65 00 31 d2 <41> f7 f4 49 01 d7 4c 89 f8 48 c1 e8 03 8a 04 30 84 c0 0f 85 fb 07 RSP: 0018:ffffc90004d9f380 EFLAGS: 00010246 RAX: 00000000361ff564 RBX: ffff888079d79280 RCX: ffff8880763fd000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff888079d792f0 RBP: ffffc90004d9f4b0 R08: ffffffff8412e427 R09: fffffbfff1bfd15e R10: fffffbfff1bfd15e R11: 0000000000000000 R12: 0000000000000000 R13: ffff888079d792f4 R14: 0000000000000010 R15: ffff88807d07ac00 FS: 00007fd81e1a4700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f122ca90019 CR3: 000000007e1a7000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netem_enqueue+0x132c/0x3800 net/sched/sch_netem.c:483 dev_qdisc_enqueue net/core/dev.c:3785 [inline] __dev_xmit_skb net/core/dev.c:3869 [inline] __dev_queue_xmit+0xd71/0x35c0 net/core/dev.c:4194 __netlink_deliver_tap_skb net/netlink/af_netlink.c:303 [inline] __netlink_deliver_tap net/netlink/af_netlink.c:321 [inline] netlink_deliver_tap+0x5f5/0x880 net/netlink/af_netlink.c:334 netlink_deliver_tap_kernel net/netlink/af_netlink.c:343 [inline] netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x7ea/0x9f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0xa20/0xe40 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x5b9/0x910 net/socket.c:2409 ___sys_sendmsg net/socket.c:2463 [inline] __sys_sendmsg+0x280/0x370 net/socket.c:2492 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd820c2eae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd81e1a4188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fd820d41f60 RCX: 00007fd820c2eae9 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000008 RBP: 00007fd820c88f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffffb0f60cf R14: 00007fd81e1a4300 R15: 0000000000022000 Modules linked in: ---[ end trace c094c89ec5e82403 ]--- RIP: 0010:netem_enqueue+0x2982/0x3800 net/sched/sch_netem.c:516 Code: 44 8b 63 70 48 89 5c 24 20 4c 8d 6b 74 4c 89 e9 48 c1 e9 03 8a 14 31 84 d2 48 8b 4c 24 10 0f 85 e3 07 00 00 45 2b 65 00 31 d2 <41> f7 f4 49 01 d7 4c 89 f8 48 c1 e8 03 8a 04 30 84 c0 0f 85 fb 07 RSP: 0018:ffffc90004d9f380 EFLAGS: 00010246 RAX: 00000000361ff564 RBX: ffff888079d79280 RCX: ffff8880763fd000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff888079d792f0 RBP: ffffc90004d9f4b0 R08: ffffffff8412e427 R09: fffffbfff1bfd15e R10: fffffbfff1bfd15e R11: 0000000000000000 R12: 0000000000000000 R13: ffff888079d792f4 R14: 0000000000000010 R15: ffff88807d07ac00 FS: 00007fd81e1a4700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f122ca90019 CR3: 000000007e1a7000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 44 8b 63 70 mov 0x70(%rbx),%r12d 4: 48 89 5c 24 20 mov %rbx,0x20(%rsp) 9: 4c 8d 6b 74 lea 0x74(%rbx),%r13 d: 4c 89 e9 mov %r13,%rcx 10: 48 c1 e9 03 shr $0x3,%rcx 14: 8a 14 31 mov (%rcx,%rsi,1),%dl 17: 84 d2 test %dl,%dl 19: 48 8b 4c 24 10 mov 0x10(%rsp),%rcx 1e: 0f 85 e3 07 00 00 jne 0x807 24: 45 2b 65 00 sub 0x0(%r13),%r12d 28: 31 d2 xor %edx,%edx * 2a: 41 f7 f4 div %r12d <-- trapping instruction 2d: 49 01 d7 add %rdx,%r15 30: 4c 89 f8 mov %r15,%rax 33: 48 c1 e8 03 shr $0x3,%rax 37: 8a 04 30 mov (%rax,%rsi,1),%al 3a: 84 c0 test %al,%al 3c: 0f .byte 0xf 3d: 85 fb test %edi,%ebx 3f: 07 (bad)