kernel: protection fault trap, code=0 Stopped at icmp_mtudisc_timeout+0x123: movq 0(%rax),%rcx ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace icmp_mtudisc_timeout(fffffd806a843b20,0) at icmp_mtudisc_timeout+0x123 sys/netinet/ip_icmp.c:1102 rt_timer_queue_flush(ffffffff838de900) at rt_timer_queue_flush+0x28d sys/net/route.c:1586 ip_sysctl(ffff80003c481afc,1,200000000600,ffff80003c481b28,200000001640,4) at ip_sysctl+0x84d sys/netinet/ip_input.c:1755 net_sysctl(ffff80003c481af4,3,200000000600,ffff80003c481b28,200000001640,4,d8e057f8db5318ca) at net_sysctl+0x64e sys/kern/uipc_domain.c:260 sys_sysctl(ffff80003c531268,ffff80003c481c60,ffff80003c481bb0) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff80003c481c60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c481c60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8dc91efd810, count: -7 ddb{0}> show registers rdi 0x14 rsi 0x14 rbp 0xffff80003c481930 rbx 0xffff80003c481901 rdx 0xffff800001584940 rcx 0xffff80003c531268 rax 0x45499aab5c77bf1d r8 0xffffffff816efef0 tcp_mtudisc_increase r9 0 r10 0x20238ee35c8e5b68 r11 0xc9edfd1d8c3252dc r12 0xffff800000050858 r13 0x14 r14 0 r15 0xfffffd806a843b20 rip 0xffffffff81ab8703 icmp_mtudisc_timeout+0x123 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c4818e0 ss 0x10 icmp_mtudisc_timeout+0x123: movq 0(%rax),%rcx ddb{0}> show proc PROC (syz-executor) tid=476777 pid=78345 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c530570,0xffff80003c530818 process=0xffff80003c413058 user=0xffff80003c47c000, vmspace=0xfffffd806c95a5d0 estcpu=31, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 85158 447044 20162 0 2 0 syz-executor 85158 30376 20162 0 3 0x4000080 ttyopn syz-executor 65217 229504 64326 0 2 0 syz-executor 65217 20159 64326 0 3 0x4000080 fsleep syz-executor 92524 341799 21758 0 2 0 syz-executor 92524 34953 21758 0 3 0x4000080 fsleep syz-executor 56897 514280 41101 0 2 0 syz-executor 56897 377581 41101 0 3 0x4000080 sbwait syz-executor 56897 502804 41101 0 3 0x4000080 fsleep syz-executor 78345 485291 45678 0 2 0 syz-executor *78345 476777 45678 0 7 0x4000000 syz-executor 79014 270625 9799 0 2 0 syz-executor 79014 161068 9799 0 3 0x4000080 fsleep syz-executor 66565 171232 8608 0 2 0 syz-executor 66565 66627 8608 0 3 0x4000080 kqsel syz-executor 66565 157435 8608 0 3 0x4000080 kqsel syz-executor 66565 180624 8608 0 3 0x4000080 fsleep syz-executor 98323 461220 0 0 3 0x14200 acct acct 55007 131240 0 0 3 0x14280 nfsidl nfsio 5919 199287 0 0 3 0x14280 nfsidl nfsio 79077 213771 0 0 3 0x14280 nfsidl nfsio 64544 299916 0 0 3 0x14280 nfsidl nfsio 23848 450888 0 0 3 0x14280 nfsidl nfsio 55899 357389 0 0 3 0x14280 nfsidl nfsio 20948 117145 0 0 3 0x14280 nfsidl nfsio 70483 426267 0 0 3 0x14280 nfsidl nfsio 85737 60098 0 0 3 0x14280 nfsidl nfsio 30510 451295 0 0 3 0x14280 nfsidl nfsio 78874 67743 0 0 3 0x14280 nfsidl nfsio 57454 426574 0 0 3 0x14280 nfsidl nfsio 27056 327660 0 0 3 0x14280 nfsidl nfsio 94817 410744 0 0 3 0x14280 nfsidl nfsio 49530 4310 0 0 3 0x14280 nfsidl nfsio 46652 282954 0 0 3 0x14280 nfsidl nfsio 75192 418648 0 0 3 0x14280 nfsidl nfsio 14674 156062 0 0 3 0x14280 nfsidl nfsio 43088 340950 0 0 3 0x14280 nfsidl nfsio 61346 412098 0 0 3 0x14280 nfsidl nfsio 62596 272809 89728 0 3 0x82 sbwait sshd-session 13631 347579 10025 0 2 0x100082 arp 10025 305389 19230 0 3 0x10008a sigsusp sh 20162 255304 59862 0 3 0x82 nanoslp syz-executor 19230 59035 59862 0 3 0x82 wait syz-executor 45678 141412 59862 0 3 0x82 nanoslp syz-executor 9799 85674 59862 0 3 0x82 nanoslp syz-executor 64326 55509 59862 0 3 0x82 nanoslp syz-executor 8608 382738 59862 0 3 0x82 nanoslp syz-executor 41101 466418 59862 0 3 0x82 nanoslp syz-executor 21758 372298 59862 0 3 0x82 nanoslp syz-executor 59862 255164 40501 0 3 0x82 kqread syz-executor 40501 390807 16978 0 3 0x10008a sigsusp ksh 16978 345694 38357 0 3 0x98 kqread sshd-session 38357 433845 89728 0 3 0x92 kqread sshd-session 82765 396611 1 0 3 0x100083 ttyopn getty 89728 518459 1 0 3 0x88 kqread sshd 1700 264756 15395 74 3 0x1100092 bpf pflogd 15395 496295 1 0 3 0x80 sbwait pflogd 12144 70228 35583 73 3 0x1100090 kqread syslogd 35583 385544 1 0 3 0x100082 sbwait syslogd 76884 383095 1 0 3 0x100080 kqread resolvd 13762 64341 89129 77 3 0x100092 kqread dhcpleased 19424 209809 89129 77 3 0x100092 kqread dhcpleased 89129 142184 1 0 3 0x80 kqread dhcpleased 66547 248206 0 0 3 0x14200 bored smr 49961 116630 0 0 2 0x14200 zerothread 61222 445620 0 0 3 0x14200 aiodoned aiodoned 38774 362064 0 0 3 0x14200 syncer update 33240 76209 0 0 3 0x14200 cleaner cleaner 73157 300443 0 0 3 0x14200 reaper reaper 57245 143415 0 0 3 0x14200 pgdaemon pagedaemon 18775 510921 0 0 3 0x14200 bored viomb 74253 159210 0 0 3 0x40014200 acpi0 acpi0 35063 381509 0 0 7 0x40014200 idle1 6900 359966 0 0 3 0x14200 bored softnet1 66264 144088 0 0 3 0x14200 bored softnet0 8674 48500 0 0 2 0x14200 systqmp 45940 226467 0 0 3 0x14200 bored systq 98038 443597 0 0 3 0x14200 tmoslp softclockmp 15995 241474 0 0 3 0x40014200 tmoslp softclock 50092 54064 0 0 3 0x40014200 idle0 1 506320 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 78345 (syz-executor) thread 0xffff80003c531268 (476777) exclusive rwlock netlock r = 0 (0xffffffff838483e0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 ip_sysctl+0x838 sys/netinet/ip_input.c:1754 #3 net_sysctl+0x64e sys/kern/uipc_domain.c:260 #4 sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #6 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11063 12153K 15167K 166960K 13306 0 pcb 19 14K 15K 166960K 132 0 rtable 184 9K 10K 166960K 492 0 pf 28 16K 18K 166960K 95 0 ifaddr 28 4K 7K 166960K 71 0 ifgroup 43 2K 2K 166960K 116 0 sysctl 3 1K 9K 166960K 10 0 counters 64 36K 37K 166960K 138 0 ioctlops 0 0K 4K 166960K 1784 0 iov 1 8K 24K 166960K 42 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1520 96K 96K 166960K 2090 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 6K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 95 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 89K 166960K 651 0 sigio 0 0K 0K 166960K 19 0 proc 72 115K 164K 166960K 557 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 193 0 in_multi 55 4K 6K 166960K 111 0 ether_multi 1 0K 0K 166960K 12 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 430 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 258 163K 185K 166960K 7790 0 UVM aobj 49 10K 10K 166960K 50 0 pinsyscall 47 94K 108K 166960K 1789 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 42 0 NDP 9 0K 1K 166960K 50 0 temp 56 8682K 8806K 166960K 27925 0 kqueue 15 22K 30K 166960K 135 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 68 0 64 1 0 1 1 0 8 0 rtentry 176 118 0 48 5 0 5 5 0 8 0 unpcb 144 713 0 691 9 3 6 6 0 8 5 syncache 336 9 0 9 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 204 0 195 7 0 7 7 0 8 6 arp 136 20 0 8 1 0 1 1 0 8 0 inpcb 328 789 0 774 13 5 8 8 0 8 6 nd6 152 21 0 9 1 0 1 1 0 8 0 pkpcb 40 10 0 10 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 29 0 29 2 1 1 1 0 8 1 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 6 0 3 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 rttmr 136 4 0 3 1 0 1 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 470 0 184 28 7 21 28 0 8 1 art_table 40 474 0 184 5 0 5 5 0 8 0 art_node 32 117 0 52 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 92 0 82 1 0 1 1 0 8 0 shmpl 112 42 0 0 2 0 2 2 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2738 0 1236 96 0 96 96 0 8 0 ffsino 296 2738 0 1236 118 0 118 118 0 8 0 nchpl 144 3634 0 1934 64 0 64 64 0 8 0 rtmask 32 7 0 7 2 1 1 1 0 8 1 vnodes 216 3216 0 0 179 0 179 179 0 8 0 namei 1024 11881 0 11881 1 0 1 1 0 8 1 percpumem 16 84 0 37 1 0 1 1 0 8 0 vcpupl 3968 4 0 0 1 0 1 1 0 8 0 vmpool 848 5 0 1 1 0 1 1 0 8 0 kstatmem 264 72 0 52 3 1 2 3 0 8 0 scxspl 216 19160 0 19160 10 2 8 8 1 8 8 plimitpl 152 220 0 202 1 0 1 1 0 8 0 sigapl 424 1007 0 936 11 0 11 11 0 8 0 knotepl 120 543 0 0 17 0 17 17 0 8 0 kqueuepl 224 351 0 337 9 4 5 5 0 8 4 pipepl 344 169 0 142 3 0 3 3 0 8 0 fdescpl 528 948 0 914 3 0 3 3 0 8 0 filepl 160 6229 0 6001 23 7 16 17 0 8 5 lockfpl 104 185 0 182 1 0 1 1 0 8 0 lockfspl 48 78 0 75 1 0 1 1 0 8 0 sessionpl 144 26 0 16 1 0 1 1 0 8 0 pgrppl 48 39 0 21 1 0 1 1 0 8 0 ucredpl 104 972 0 959 1 0 1 1 0 8 0 zombiepl 144 936 0 936 1 0 1 1 0 8 1 processpl 1232 1007 0 936 8 0 8 8 0 8 0 procpl 664 1835 0 1754 9 0 9 9 0 8 0 sosppl 176 2 0 2 1 1 0 1 0 8 0 sockpl 752 1594 0 1553 32 19 13 19 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 33 0 0 5 0 5 5 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 273 0 0 17 0 17 17 0 8 0 bufpl 280 7477 0 1341 439 0 439 439 0 8 0 anonpl 32 10046 0 0 81 0 81 81 0 246 0 amapchunkpl 152 25489 0 24996 39 12 27 34 0 158 6 amappl16 200 3950 0 3917 25 10 15 18 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 6 0 6 1 1 0 1 0 8 0 amappl13 176 421 0 419 1 0 1 1 0 8 0 amappl12 168 1315 0 1268 3 0 3 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 28 0 26 1 0 1 1 0 8 0 amappl7 128 78 0 77 1 0 1 1 0 8 0 amappl6 120 273 0 257 1 0 1 1 0 8 0 amappl5 112 84 0 73 1 0 1 1 0 8 0 amappl4 104 439 0 407 1 0 1 1 0 8 0 amappl3 96 4315 0 4223 4 1 3 3 0 8 0 amappl2 88 1090 0 1004 3 0 3 3 0 8 0 amappl1 80 12157 0 11448 18 0 18 18 0 8 0 amappl 88 6966 0 6797 5 0 5 5 0 92 0 uvmvnodes 80 115 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 49 0 1 1 0 1 1 0 8 0 uaddrrnd 24 948 0 914 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 948 0 914 1 0 1 1 0 8 0 vmmpekpl 168 9906 0 9871 3 0 3 3 0 8 0 vmmpepl 168 68168 0 66035 118 11 107 118 0 357 7 vmsppl 488 947 0 914 5 0 5 5 0 8 0 rwobjpl 80 21736 0 20510 35 0 35 35 0 8 0 pdppl 4096 1914 0 1834 106 26 80 84 0 8 0 pvpl 32 18187 0 0 147 0 147 147 0 265 0 pmappl 256 952 0 915 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 295 0 37 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace icmp_mtudisc_timeout(fffffd806a843b20,0) at icmp_mtudisc_timeout+0x123 sys/netinet/ip_icmp.c:1102 rt_timer_queue_flush(ffffffff838de900) at rt_timer_queue_flush+0x28d sys/net/route.c:1586 ip_sysctl(ffff80003c481afc,1,200000000600,ffff80003c481b28,200000001640,4) at ip_sysctl+0x84d sys/netinet/ip_input.c:1755 net_sysctl(ffff80003c481af4,3,200000000600,ffff80003c481b28,200000001640,4,d8e057f8db5318ca) at net_sysctl+0x64e sys/kern/uipc_domain.c:260 sys_sysctl(ffff80003c531268,ffff80003c481c60,ffff80003c481bb0) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff80003c481c60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c481c60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8dc91efd810, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5