hrtimer: interrupt took 28178 ns divide error: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 9509 Comm: syz-executor.1 Not tainted 4.14.246-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888048e06580 task.stack: ffff888048e08000 RIP: 0010:netem_enqueue+0x1364/0x2df0 net/sched/sch_netem.c:511 RSP: 0018:ffff888048e0f750 EFLAGS: 00010246 RAX: 0000000085f8e59f RBX: ffff88809f8b6800 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880a13d2180 RDI: ffff8880a13d2204 RBP: 0000000000000020 R08: ffff8880a13d2258 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88809ffc9460 R14: 0000000000000000 R15: ffff88809ffc9240 FS: 00007f19c531b700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000543978 CR3: 00000000a138b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netem_enqueue+0x889/0x2df0 net/sched/sch_netem.c:475 __dev_xmit_skb net/core/dev.c:3225 [inline] __dev_queue_xmit+0x121d/0x2480 net/core/dev.c:3489 __netlink_deliver_tap_skb net/netlink/af_netlink.c:273 [inline] __netlink_deliver_tap net/netlink/af_netlink.c:291 [inline] netlink_deliver_tap+0x60c/0x7d0 net/netlink/af_netlink.c:302 netlink_deliver_tap_kernel net/netlink/af_netlink.c:311 [inline] netlink_unicast_kernel net/netlink/af_netlink.c:1288 [inline] netlink_unicast+0x485/0x610 net/netlink/af_netlink.c:1315 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1880 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4665f9 RSP: 002b:00007f19c531b188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 00000000200004c0 RDI: 0000000000000007 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffd100450ef R14: 00007f19c531b300 R15: 0000000000022000 Code: 4c 89 44 24 20 89 4c 24 18 89 44 24 10 e8 35 12 a4 fb 4c 8b 44 24 20 8b 4c 24 18 8b 44 24 10 48 8b 34 24 31 d2 2b 8e 84 00 00 00 f1 48 b8 00 00 00 00 00 fc ff df 48 01 d3 48 89 d9 48 c1 e9 RIP: netem_enqueue+0x1364/0x2df0 net/sched/sch_netem.c:511 RSP: ffff888048e0f750 ---[ end trace 737af79fce71d2ed ]--- ---------------- Code disassembly (best guess): 0: 4c 89 44 24 20 mov %r8,0x20(%rsp) 5: 89 4c 24 18 mov %ecx,0x18(%rsp) 9: 89 44 24 10 mov %eax,0x10(%rsp) d: e8 35 12 a4 fb callq 0xfba41247 12: 4c 8b 44 24 20 mov 0x20(%rsp),%r8 17: 8b 4c 24 18 mov 0x18(%rsp),%ecx 1b: 8b 44 24 10 mov 0x10(%rsp),%eax 1f: 48 8b 34 24 mov (%rsp),%rsi 23: 31 d2 xor %edx,%edx 25: 2b 8e 84 00 00 00 sub 0x84(%rsi),%ecx * 2b: f7 f1 div %ecx <-- trapping instruction 2d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 34: fc ff df 37: 48 01 d3 add %rdx,%rbx 3a: 48 89 d9 mov %rbx,%rcx 3d: 48 rex.W 3e: c1 .byte 0xc1 3f: e9 .byte 0xe9