kernel: protection fault trap, code=0 Stopped at icmp_mtudisc_timeout+291: 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(fffffd806b7d9220,0) at icmp_mtudisc_timeout+291 rt_timer_queue_flush(ffffffff839920f8) at rt_timer_queue_flush+653 ip_sysctl(ffff80002a362bec,1,0,ffff80002a362c18,200000001300,4) at ip_sysctl+2125 net_sysctl(ffff80002a362be4,3,0,ffff80002a362c18,200000001300,4,4fc739380812767b) at net_sysctl+1614 sys_sysctl(ffff80003c42c028,ffff80002a362d50,ffff80002a362ca0) at sys_sysctl+997 syscall(ffff80002a362d50) at syscall+3028 Xsyscall() at Xsyscall+296 end of kernel end trace frame: 0xeefae5174f0, count: -7 ddb{0}> show registers rdi 20 rsi 20 rbp 18446603336929389088 rbx 18446603336929389057 rdx 18446603336242663872 rcx 18446603337232203816 rax 7527431376043171465 r8 18446744071590299072 tcp_mtudisc_increase r9 0 r10 7036638950363239886 r11 15110371126199137147 r12 18446603336221399128 r13 20 r14 0 r15 18446741326733873696 rip 18446744071610789011 icmp_mtudisc_timeout+291 cs 8 rflags 66118 __ALIGN_SIZE+62022 rsp 18446603336929389008 ss 16 icmp_mtudisc_timeout+291: movq 0(%rax),%rcx ddb{0}> show proc PROC (syz-executor) tid=387870 pid=80546 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c42d250,0xffffffff8389d358 process=0xffff8000fffeb510 user=0xffff80002a35d000, vmspace=0xfffffd806c00fd78 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 80546 2289 64223 0 2 0 syz-executor *80546 387870 64223 0 7 0x4000000 syz-executor 57887 93725 95997 60929 2 0x10 syz-executor 57887 168501 95997 60929 2 0x4000010 syz-executor 22175 477951 97373 0 3 0x80 nanoslp syz-executor 22175 449834 97373 0 3 0x4000080 netcon syz-executor 22175 295547 97373 0 3 0x4000080 fsleep syz-executor 74292 102834 79901 0 2 0 syz-executor 74292 5094 79901 0 3 0x4000080 fsleep syz-executor 28915 8574 4593 0 2 0 syz-executor 28915 482091 4593 0 3 0x4000080 fsleep syz-executor 28915 72289 4593 0 3 0x4000080 fsleep syz-executor 28915 313323 4593 0 3 0x4000080 fsleep syz-executor 28915 181084 4593 0 3 0x4000080 fsleep syz-executor 28915 61356 4593 0 3 0x4000080 fsleep syz-executor 6277 309965 27269 0 3 0x3000 suspend syz-executor 6277 90946 27269 0 2 0x4081000 syz-executor 55902 377092 0 0 3 0x14200 acct acct 95997 522297 79562 0 3 0x82 nanoslp syz-executor 64223 250856 79562 0 3 0x82 nanoslp syz-executor 79901 173112 79562 0 3 0x82 nanoslp syz-executor 97373 454666 79562 0 3 0x82 nanoslp syz-executor 4593 84145 79562 0 3 0x82 nanoslp syz-executor 27269 49654 79562 0 3 0x82 nanoslp syz-executor 65075 116879 1 0 3 0x100083 ttyin getty 42494 28306 79562 0 3 0x82 nanoslp syz-executor 89647 111487 79562 0 3 0x82 wait syz-executor 79562 422729 86929 0 3 0x82 kqread syz-executor 86929 286048 14462 0 3 0x10008a sigsusp ksh 14462 415216 6935 0 3 0x98 kqread sshd-session 6935 417778 81691 0 3 0x92 kqread sshd-session 81691 481642 1 0 3 0x88 kqread sshd 27882 82823 43278 74 3 0x1100092 bpf pflogd 43278 52940 1 0 3 0x80 sbwait pflogd 36291 16798 55156 73 3 0x1100090 kqread syslogd 55156 132856 1 0 3 0x100082 sbwait syslogd 17062 147021 1 0 3 0x100080 kqread resolvd 72491 10902 60491 77 3 0x100092 kqread dhcpleased 84899 178184 60491 77 3 0x100092 kqread dhcpleased 60491 175840 1 0 3 0x80 kqread dhcpleased 15043 109594 0 0 3 0x14200 bored smr 18176 166892 0 0 2 0x14200 zerothread 50074 459978 0 0 3 0x14200 aiodoned aiodoned 45539 382016 0 0 3 0x14200 syncer update 14338 459339 0 0 3 0x14200 cleaner cleaner 10310 189753 0 0 3 0x14200 reaper reaper 86311 278974 0 0 3 0x14200 pgdaemon pagedaemon 66034 130603 0 0 3 0x14200 bored viomb 85684 243388 0 0 3 0x40014200 acpi0 acpi0 77878 51778 0 0 7 0x40014200 idle1 46983 480844 0 0 3 0x14200 bored softnet1 2876 286737 0 0 3 0x14200 bored softnet0 10967 145658 0 0 2 0x14200 systqmp 43184 115571 0 0 3 0x14200 bored systq 95006 328052 0 0 3 0x14200 tmoslp softclockmp 59909 462452 0 0 3 0x40014200 tmoslp softclock 57578 464039 0 0 3 0x40014200 idle0 1 165749 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 80546 (syz-executor) thread 0xffff80003c42c028 (387870) Process 6277 (syz-executor) thread 0xffff80002a28f240 (90946) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10257 11129K 12468K 166960K 17343 0 pcb 19 20K 22K 166960K 1052 0 rtable 244 15K 16K 166960K 1473 0 pf 39 18K 67486K 166960K 601 0 ifaddr 40 8K 10K 166960K 328 0 ifgroup 60 2K 3K 166960K 648 0 sysctl 4 1K 9K 166960K 40 0 counters 70 37K 38K 166960K 830 0 ioctlops 0 0K 5K 166960K 2699 0 iov 0 0K 24K 166960K 267 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1480 93K 94K 166960K 5436 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 94 0 VM map 2 1K 1K 166960K 2 0 sem 57 115K 134K 166960K 459 0 dirhash 12 2K 3K 166960K 111 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 236K 166960K 4981 0 sigio 1 0K 0K 166960K 184 0 proc 75 115K 180K 166960K 1224 0 subproc 72 4K 4K 166960K 126 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 728 0 in_multi 80 6K 7K 166960K 357 0 ether_multi 1 0K 0K 166960K 47 0 mrt 1 0K 0K 166960K 40 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 1409 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 18 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 285 162K 218K 166960K 47613 0 UVM aobj 109 8K 8K 166960K 122 0 pinsyscall 43 86K 110K 166960K 6262 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 366 0 NDP 13 0K 2K 166960K 242 0 temp 159 8661K 8756K 166960K 400983 0 kqueue 13 20K 36K 166960K 969 0 SYN cache 2 8K 16K 166960K 3 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 120 532 0 528 5 3 2 2 0 8 1 rtentry 176 464 0 376 6 0 6 6 0 8 0 unpcb 144 3799 0 3781 33 32 1 9 0 8 0 syncache 336 19 0 19 9 8 1 1 0 8 1 tcpqe 32 1 13 1 1 1 0 1 0 8 0 tcpcb 736 1727 0 1710 41 39 2 9 0 8 0 arp 136 80 0 60 1 0 1 1 0 8 0 inpcb 328 6405 0 6382 68 60 8 14 0 8 4 nd6 152 56 0 40 1 0 1 1 0 8 0 pkpcb 40 49 0 49 15 14 1 1 0 8 1 kcovpl 48 14 0 6 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 310 0 309 6 5 1 1 0 8 0 pppxif 1504 42 0 42 14 14 0 1 0 8 0 pfstscr 40 4 0 4 1 1 0 1 0 8 0 pffrag 232 36 0 34 5 4 1 1 0 482 0 pffrnode 88 28 0 26 5 4 1 1 0 8 0 pffrent 40 195 0 193 6 5 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 29 0 29 3 3 0 1 0 8 0 pfstitem 24 324 0 229 1 0 1 1 0 8 0 pfstkey 128 327 0 232 4 0 4 4 0 8 0 pfstate 384 326 0 231 13 2 11 11 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 rttmr 136 9 0 7 6 5 1 1 0 8 0 art_heap8 4096 6 0 2 6 2 4 5 0 8 0 art_heap4 256 1594 0 1203 36 9 27 29 0 8 0 art_table 40 1600 0 1205 5 0 5 5 0 8 0 art_node 32 455 0 378 2 0 2 2 0 8 0 sysvmsgpl 40 28 0 20 1 0 1 1 0 8 0 semupl 112 9 0 9 7 7 0 1 0 8 0 semapl 112 410 0 355 4 2 2 2 0 8 0 shmpl 112 119 0 13 4 0 4 4 0 8 0 dirhash 1024 83 0 66 3 0 3 3 0 8 0 dino2pl 256 10961 0 9439 96 0 96 96 0 8 0 ffsino 296 10961 0 9439 118 0 118 118 0 8 0 nchpl 144 17834 0 16114 65 0 65 65 0 8 0 rtmask 32 37 0 37 10 10 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 61782 0 61781 8 7 1 2 0 8 0 percpumem 16 430 0 380 1 0 1 1 0 8 0 kstatmem 264 424 0 394 5 2 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 17 0 17 11 11 0 1 0 8 0 scxspl 216 111767 0 111767 22 20 2 8 1 8 2 plimitpl 152 1754 0 1734 1 0 1 1 0 8 0 sigapl 424 5256 0 5207 8 1 7 7 0 8 0 knotepl 120 864 0 0 24 0 24 24 0 8 0 kqueuepl 224 2063 0 2054 24 23 1 5 0 8 0 pipepl 344 804 0 776 12 9 3 6 0 8 0 fdescpl 528 5219 0 5187 3 0 3 3 0 8 0 filepl 160 37481 0 37246 62 48 14 19 0 8 0 lockfpl 104 2611 0 2609 7 5 2 4 0 8 1 lockfspl 48 797 0 795 1 0 1 1 0 8 0 sessionpl 144 39 0 30 1 0 1 1 0 8 0 pgrppl 48 125 0 108 1 0 1 1 0 8 0 ucredpl 104 6861 0 6847 1 0 1 1 0 8 0 zombiepl 144 6605 0 6602 4 3 1 1 0 8 0 processpl 1232 5256 0 5207 6 1 5 5 0 8 0 procpl 664 13516 0 13456 7 0 7 7 0 8 0 sosppl 176 31 0 31 9 9 0 1 0 8 0 sockpl 752 10941 0 10896 133 121 12 25 0 8 5 mcl64k 65536 28 0 0 4 0 4 4 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 134 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 82 0 0 7 2 5 7 0 8 0 mtagpl 96 15 0 0 1 0 1 1 0 8 0 mbufpl 256 5578 0 0 338 0 338 338 0 8 0 bufpl 280 45409 0 39272 439 0 439 439 0 8 0 anonpl 32 26392 0 0 213 1 212 212 0 246 0 amapchunkpl 152 171669 0 170828 119 80 39 45 0 158 5 amappl16 200 18635 0 17774 121 67 54 59 0 8 1 amappl15 192 7 0 6 2 1 1 1 0 8 0 amappl14 184 39 0 39 4 4 0 1 0 8 0 amappl13 176 507 0 502 1 0 1 1 0 8 0 amappl12 168 5648 0 5604 3 0 3 3 0 8 0 amappl11 160 14 0 13 2 1 1 1 0 8 0 amappl10 152 54 0 39 1 0 1 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 30 0 27 1 0 1 1 0 8 0 amappl7 128 104 0 103 1 0 1 1 0 8 0 amappl6 120 362 0 348 1 0 1 1 0 8 0 amappl5 112 90 0 79 1 0 1 1 0 8 0 amappl4 104 496 0 465 2 0 2 2 0 8 0 amappl3 96 29515 0 29407 3 0 3 3 0 8 0 amappl2 88 5402 0 5321 3 0 3 3 0 8 0 amappl1 80 31978 0 31384 23 2 21 23 0 8 0 amappl 88 45918 0 45711 6 0 6 6 0 92 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma32768 32768 2 0 2 2 2 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 4 0 4 3 3 0 1 0 8 0 dma2048 2048 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 128 257 0 257 4 4 0 1 0 8 0 dma64 64 7 0 7 2 2 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 72 121 0 13 2 0 2 2 0 8 0 uaddrrnd 24 5219 0 5187 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5219 0 5187 1 0 1 1 0 8 0 vmmpekpl 168 39281 0 39220 4 1 3 3 0 8 0 vmmpepl 168 335669 0 332768 206 60 146 165 0 357 2 vmsppl 488 5218 0 5187 7 2 5 5 0 8 0 rwobjpl 80 90498 0 82648 184 12 172 175 0 8 0 pdppl 4096 10445 0 10374 139 68 71 85 0 8 0 pvpl 32 37206 0 0 298 0 298 298 0 265 0 pmappl 256 5218 0 5187 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 720 0 145 17 0 17 17 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace icmp_mtudisc_timeout(fffffd806b7d9220,0) at icmp_mtudisc_timeout+291 rt_timer_queue_flush(ffffffff839920f8) at rt_timer_queue_flush+653 ip_sysctl(ffff80002a362bec,1,0,ffff80002a362c18,200000001300,4) at ip_sysctl+2125 net_sysctl(ffff80002a362be4,3,0,ffff80002a362c18,200000001300,4,4fc739380812767b) at net_sysctl+1614 sys_sysctl(ffff80003c42c028,ffff80002a362d50,ffff80002a362ca0) at sys_sysctl+997 syscall(ffff80002a362d50) at syscall+3028 Xsyscall() at Xsyscall+296 end of kernel end trace frame: 0xeefae5174f0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+39: addq $8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299edff0) at x86_ipi_db+39 x86_ipi_handler() at x86_ipi_handler+217 Xresume_lapic_ipi() at Xresume_lapic_ipi+39 acpicpu_idle() at acpicpu_idle+1111 sched_idle(ffff8000299edff0) at sched_idle+913 end trace frame: 0x0, count: -5