kernel: protection fault trap, code=0 Stopped at icmp_mtudisc_timeout+0x111: movq 0(%rax),%rcx ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace icmp_mtudisc_timeout(fffffd806bb0b320,0) at icmp_mtudisc_timeout+0x111 sys/netinet/ip_icmp.c:1083 rt_timer_queue_flush(ffffffff83971a58) at rt_timer_queue_flush+0x281 sys/net/route.c:1580 ip_sysctl(ffff80003c4de8ac,1,0,ffff80003c4de8d8,400000001300,4) at ip_sysctl+0x7b4 sys/netinet/ip_input.c:1740 net_sysctl(ffff80003c4de8a4,3,0,ffff80003c4de8d8,400000001300,4,1f4a54ed39fd0ac6) at net_sysctl+0x64a sys/kern/uipc_domain.c:256 sys_sysctl(ffff80003acca2d0,ffff80003c4dea10,ffff80003c4de960) at sys_sysctl+0x425 syscall(ffff80003c4dea10) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4dea10) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3505037f0a0, count: -7 ddb{1}> show registers rdi 0x14 rsi 0x14 rbp 0xffff80003c4de6f0 rbx 0x3 rdx 0xffff8000016313c0 rcx 0xffff80003acca2d0 rax 0x22c648ba0f73c4b8 r8 0xffffffff820f4520 tcp_mtudisc_increase r9 0 r10 0x1071057901b92c3 r11 0xc30f3b69f8a37b48 r12 0xffff800000039058 r13 0x14 r14 0 r15 0xfffffd806bb0b320 rip 0xffffffff82886fa1 icmp_mtudisc_timeout+0x111 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c4de6a0 ss 0x10 icmp_mtudisc_timeout+0x111: movq 0(%rax),%rcx ddb{1}> show proc PROC (syz-executor) tid=124204 pid=41322 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=0xffff8000ffffd9b0,0xffff80002a37d738 process=0xffff8000ffff7740 user=0xffff80003c4d9000, vmspace=0xfffffd806be8fc90 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 99845 423629 42223 0 7 0 syz-executor 41322 372172 49088 0 2 0 syz-executor *41322 124204 49088 0 7 0x4000000 syz-executor 5859 390889 87620 0 3 0x80 nanoslp syz-executor 5859 137472 87620 0 3 0x4000080 ttyin syz-executor 73964 253441 9544 0 3 0x80 nanoslp syz-executor 73964 299125 9544 0 3 0x4000000 smrbar syz-executor 73964 489359 9544 0 3 0x4000080 fsleep syz-executor 74745 107781 19985 0 3 0x80 nanoslp syz-executor 74745 159703 19985 0 3 0x4000080 bell syz-executor 74745 75801 19985 0 3 0x4000080 kqsel syz-executor 74745 384401 19985 0 3 0x4000080 fsleep syz-executor 80468 267732 17689 0 3 0x80 nanoslp syz-executor 80468 501246 17689 0 3 0x4000080 pipewr syz-executor 80468 52821 17689 0 3 0x4000080 fsleep syz-executor 17689 292262 54705 0 3 0x82 nanoslp syz-executor 49345 337632 0 0 3 0x14200 acct acct 49088 323876 54705 0 3 0x82 nanoslp syz-executor 66445 412283 1 0 3 0x100083 ttyin getty 87620 476565 54705 0 3 0x82 nanoslp syz-executor 42223 113558 54705 0 3 0x82 nanoslp syz-executor 46235 99315 59086 0 3 0x82 sbwait sshd-session 46496 143454 59086 0 3 0x82 sbwait sshd-session 8054 109524 0 0 3 0x14200 bored sosplice 9544 272422 54705 0 3 0x82 nanoslp syz-executor 96803 109702 54705 0 3 0x82 nanoslp syz-executor 19985 235843 54705 0 3 0x82 nanoslp syz-executor 40957 181075 54705 0 3 0x2 biowait syz-executor 54705 460943 72884 0 2 0x2 syz-executor 72884 305485 59628 0 3 0x10008a sigsusp ksh 59628 351263 71417 0 3 0x98 kqread sshd-session 71417 320605 59086 0 3 0x92 kqread sshd-session 59086 354977 1 0 3 0x88 kqread sshd 76279 80646 51259 74 3 0x1100092 bpf pflogd 51259 496208 1 0 3 0x80 sbwait pflogd 50477 6889 67230 73 3 0x1100090 kqread syslogd 67230 479480 1 0 3 0x100082 sbwait syslogd 60110 429074 1 0 3 0x100080 kqread resolvd 99742 475082 44766 77 3 0x100092 kqread dhcpleased 937 493758 44766 77 3 0x100092 kqread dhcpleased 44766 128684 1 0 3 0x80 kqread dhcpleased 27612 125979 0 0 3 0x14200 bored smr 2735 230913 0 0 2 0x14200 zerothread 40941 361976 0 0 3 0x14200 aiodoned aiodoned 77678 436155 0 0 3 0x14200 syncer update 35953 373284 0 0 3 0x14200 cleaner cleaner 99397 12401 0 0 3 0x14200 reaper reaper 83497 302135 0 0 3 0x14200 pgdaemon pagedaemon 49831 83136 0 0 3 0x14200 bored viomb 14167 24538 0 0 3 0x40014200 acpi0 acpi0 86274 355021 0 0 3 0x40014200 idle1 87914 40408 0 0 3 0x14200 bored softnet3 11911 347953 0 0 3 0x14200 bored softnet2 68573 361500 0 0 3 0x14200 bored softnet1 86348 225347 0 0 3 0x14200 bored softnet0 28224 227360 0 0 3 0x14200 bored systqmp 59511 88617 0 0 3 0x14200 bored systq 82715 130661 0 0 3 0x14200 tmoslp softclockmp 52503 299556 0 0 3 0x40014200 tmoslp softclock 45024 215734 0 0 3 0x40014200 idle0 1 268106 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 99845 (syz-executor) thread 0xffff80002a37d728 (423629) Process 41322 (syz-executor) thread 0xffff80003acca2d0 (124204) Process 73964 (syz-executor) thread 0xffff80002a3819c8 (299125) Process 40957 (syz-executor) thread 0xffff80002a37c538 (181075) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10249 11244K 12705K 166960K 15198 0 pcb 18 20K 22K 166960K 536 0 rtable 202 8K 10K 166960K 682 0 pf 39 18K 19K 166960K 230 0 ifaddr 39 7K 8K 166960K 141 0 ifgroup 62 2K 2K 166960K 254 0 sysctl 4 1K 1K 166960K 6 0 counters 68 36K 37K 166960K 226 0 ioctlops 0 0K 4K 166960K 1814 0 iov 0 0K 28K 166960K 95 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1535 96K 97K 166960K 3320 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 39 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 239 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 110K 166960K 1993 0 sigio 0 0K 0K 166960K 50 0 proc 73 91K 140K 166960K 838 0 subproc 72 4K 4K 166960K 109 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 315 0 in_multi 75 5K 7K 166960K 243 0 ether_multi 1 0K 0K 166960K 43 0 mrt 2 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 667 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 6 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 243 74K 87K 166960K 20475 0 UVM aobj 101 3K 3K 166960K 105 0 pinsyscall 46 92K 104K 166960K 3234 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 96 0 NDP 14 0K 2K 166960K 99 0 temp 82 8644K 8741K 166960K 75527 0 kqueue 15 24K 32K 166960K 348 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 301 0 298 3 0 3 3 0 8 2 rtentry 112 211 0 124 4 0 4 4 0 8 0 unpcb 144 1822 0 1803 15 13 2 9 0 8 1 syncache 336 12 0 12 4 4 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 808 944 0 934 16 11 5 11 0 8 3 arp 120 32 0 14 1 0 1 1 0 8 0 inpcb 376 2953 0 2939 30 20 10 15 0 8 8 nd6 136 42 0 23 1 0 1 1 0 8 0 pkpcb 40 17 0 17 3 2 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1168 53 0 52 2 1 1 1 0 8 0 pppxif 1472 8 0 8 3 2 1 1 0 8 1 pffrag 232 63 0 54 2 1 1 1 0 482 0 pffrnode 88 62 0 54 2 1 1 1 0 8 0 pffrent 40 181 0 172 2 1 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 pfstitem 24 144 0 47 1 0 1 1 0 8 0 pfstkey 128 144 0 47 4 0 4 4 0 8 0 pfstate 376 144 0 47 10 0 10 10 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 rttmr 136 3 0 2 1 0 1 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 845 0 497 33 7 26 30 0 8 3 art_table 32 849 0 497 4 0 4 4 0 8 0 art_node 16 199 0 121 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 237 0 227 1 0 1 1 0 8 0 shmpl 112 102 0 4 3 0 3 3 0 8 0 dirhash 1024 40 0 23 3 0 3 3 0 8 0 dino2pl 256 4918 0 3405 95 0 95 95 0 8 0 ffsino 280 4918 0 3405 109 0 109 109 0 8 0 nchpl 144 7601 0 5896 64 0 64 64 0 8 0 rtmask 32 5 0 5 3 2 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 26858 0 26858 2 1 1 2 0 8 1 percpumem 16 127 0 79 1 0 1 1 0 8 0 kstatmem 264 148 0 120 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 26720 0 26719 15 14 1 8 1 8 0 plimitpl 152 516 0 497 1 0 1 1 0 8 0 sigapl 424 2314 0 2261 11 4 7 9 0 8 0 futexpl 64 30884 0 30881 1 0 1 1 0 8 0 knotepl 120 603 0 0 18 0 18 18 0 8 0 kqueuepl 216 1079 0 1066 10 5 5 5 0 8 4 pipepl 328 369 0 338 8 5 3 8 0 8 0 fdescpl 504 2268 0 2235 5 0 5 5 0 8 0 filepl 152 16431 0 16189 29 14 15 22 0 8 4 lockfpl 104 752 0 750 4 3 1 4 0 8 0 lockfspl 48 210 0 208 1 0 1 1 0 8 0 sessionpl 144 37 0 26 1 0 1 1 0 8 0 pgrppl 48 80 0 61 1 0 1 1 0 8 0 ucredpl 104 2205 0 2192 1 0 1 1 0 8 0 zombiepl 144 3192 0 3191 2 1 1 1 0 8 0 processpl 1176 2314 0 2261 6 1 5 6 0 8 0 procpl 656 5402 0 5340 9 2 7 8 0 8 0 srpgc 96 19 0 19 4 3 1 1 0 8 1 sosppl 168 11 0 11 4 3 1 1 0 8 1 sockpl 688 5202 0 5166 39 27 12 22 0 8 6 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 53 0 0 7 0 7 7 0 8 0 mtagpl 96 161 0 0 4 0 4 4 0 8 0 mbufpl 256 448 0 0 26 0 26 26 0 8 0 bufpl 280 8001 0 1847 440 0 440 440 0 8 0 anonpl 24 300408 0 295941 86 32 54 69 0 184 9 amapchunkpl 152 67202 0 66667 46 18 28 33 0 158 2 amappl16 200 6186 0 6149 56 42 14 27 0 8 8 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 143 0 129 1 0 1 1 0 8 0 amappl13 176 9 0 9 3 3 0 1 0 8 0 amappl12 168 2991 0 2959 4 1 3 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 9 0 9 1 1 0 1 0 8 0 amappl9 144 287 0 287 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 128 0 114 1 0 1 1 0 8 0 amappl6 120 228 0 222 1 0 1 1 0 8 0 amappl5 112 139 0 129 1 0 1 1 0 8 0 amappl4 104 371 0 352 1 0 1 1 0 8 0 amappl3 96 13716 0 13604 4 0 4 4 0 8 0 amappl2 88 813 0 737 2 0 2 2 0 8 0 amappl1 80 15947 0 15198 18 0 18 18 0 8 0 amappl 88 19903 0 19726 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 104 0 4 2 0 2 2 0 8 0 uaddrrnd 24 2268 0 2235 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2268 0 2235 1 0 1 1 0 8 0 vmmpekpl 168 19261 0 19207 4 0 4 4 0 8 0 vmmpepl 168 143815 0 141667 125 17 108 108 0 357 3 vmsppl 456 2267 0 2235 6 1 5 5 0 8 0 rwobjpl 64 44665 0 37493 122 1 121 121 0 8 2 pdppl 4096 4544 0 4470 114 38 76 84 0 8 2 pvpl 32 18375 0 0 150 2 148 148 0 265 0 pmappl 248 2267 0 2235 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 334 0 65 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff837a8ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff8399aeb0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8399aeb0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 intr_handler(ffff80002a394290,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d pmap_enter(fffffd806bd294e8,853e41ea000,77cc9000,3,22) at pmap_enter+0xd4f sys/arch/amd64/amd64/pmap.c:2966 uvm_fault_upper(ffff80002a394678,ffff80002a3946b0,ffff80002a394570) at uvm_fault_upper+0x32f sys/uvm/uvm_fault.c:1100 uvm_fault(fffffd807eb8cc78,853e41ea000,0,2) at uvm_fault+0x19c sys/uvm/uvm_fault.c:676 upageflttrap(ffff80002a394800,853e41eae10) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002a394800) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x708e180aebc0, count: -14 ddb{0}> machine ddbcpu 1 Stopped at icmp_mtudisc_timeout+0x111: movq 0(%rax),%rcx ddb{1}> trace icmp_mtudisc_timeout(fffffd806bb0b320,0) at icmp_mtudisc_timeout+0x111 sys/netinet/ip_icmp.c:1083 rt_timer_queue_flush(ffffffff83971a58) at rt_timer_queue_flush+0x281 sys/net/route.c:1580 ip_sysctl(ffff80003c4de8ac,1,0,ffff80003c4de8d8,400000001300,4) at ip_sysctl+0x7b4 sys/netinet/ip_input.c:1740 net_sysctl(ffff80003c4de8a4,3,0,ffff80003c4de8d8,400000001300,4,1f4a54ed39fd0ac6) at net_sysctl+0x64a sys/kern/uipc_domain.c:256 sys_sysctl(ffff80003acca2d0,ffff80003c4dea10,ffff80003c4de960) at sys_sysctl+0x425 syscall(ffff80003c4dea10) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4dea10) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3505037f0a0, count: -7