2ěkernel: protection fault trap, code=0 Stopped at icmp_mtudisc_timeout+0x11d: movq 0(%rax),%rcx ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace icmp_mtudisc_timeout(fffffd80770a42a8,0) at icmp_mtudisc_timeout+0x11d sys/netinet/ip_icmp.c:1102 rt_timer_queue_flush(ffffffff8393fb28) at rt_timer_queue_flush+0x28d sys/net/route.c:1586 ip_sysctl(ffff80003c99b56c,1,0,ffff80003c99b598,200000001300,4) at ip_sysctl+0x84c sys/netinet/ip_input.c:1750 net_sysctl(ffff80003c99b564,3,0,ffff80003c99b598,200000001300,4,7dba273b3d5de14c) at net_sysctl+0x64e sys/kern/uipc_domain.c:260 sys_sysctl(ffff80002a8234d8,ffff80003c99b6c0,ffff80003c99b610) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff80003c99b6c0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c99b6c0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x92850137d10, count: -7 ddb> show registers rdi 0x14 rsi 0x14 rbp 0xffff80003c99b3a0 rbx 0xffff80003c99b301 rdx 0xffff8000014ed440 rcx 0xb70 rax 0x4aeee8a0d349a215 r8 0xffffffff81c26d30 tcp_mtudisc_increase r9 0 r10 0x2486989c89f23f0c r11 0xe4872e53015b0ee r12 0xffff800000039058 r13 0x14 r14 0 r15 0xfffffd80770a42a8 rip 0xffffffff830347ed icmp_mtudisc_timeout+0x11d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c99b350 ss 0x10 icmp_mtudisc_timeout+0x11d: movq 0(%rax),%rcx ddb> show proc PROC (syz-executor) tid=326493 pid=88209 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a822fa8,0xffffffff838fca88 process=0xffff80002f135250 user=0xffff80003c996000, vmspace=0xfffffd807e22b008 estcpu=36, cpticks=20, pctcpu=0.0, user=0, sys=20, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 88209 328719 43109 0 2 0 syz-executor *88209 326493 43109 0 7 0x4000000 syz-executor 25014 378252 15144 0 2 0 syz-executor 25014 136105 15144 0 3 0x4000080 fsleep syz-executor 21676 86132 97134 0 2 0 syz-executor 21676 12932 97134 0 3 0x4000080 ttyopn syz-executor 5525 287499 45827 0 2 0 syz-executor 5525 1317 45827 0 3 0x4000080 fsleep syz-executor 5525 264786 45827 0 3 0x4000080 fsleep syz-executor 5525 231706 45827 0 3 0x4000080 fsleep syz-executor 45108 383820 72897 0 2 0 syz-executor 45108 319134 72897 0 3 0x4000080 ttyin syz-executor 45108 357883 72897 0 3 0x4000080 fsleep syz-executor 96458 197311 78053 60928 2 0x10 syz-executor 96458 225751 78053 60928 3 0x4000090 fsleep syz-executor 26966 464959 28627 0 2 0 syz-executor 26966 455359 28627 0 3 0x4000080 fsleep syz-executor 26966 396471 28627 0 3 0x4000080 fsleep syz-executor 54185 269018 0 0 3 0x14200 acct acct 57965 89360 1 0 3 0x100083 ttyin getty 43109 171811 66890 0 2 0xc82 syz-executor 45827 380854 66890 0 2 0x2 syz-executor 72897 62235 66890 0 2 0xc82 syz-executor 97134 184459 66890 0 2 0xc82 syz-executor 11528 350255 0 0 3 0x14200 bored sosplice 78053 257990 66890 0 2 0xc82 syz-executor 28627 64230 66890 0 2 0xc82 syz-executor 41040 339141 66890 0 2 0xc82 syz-executor 15144 266074 66890 0 2 0xc82 syz-executor 66890 44148 40583 0 3 0x82 kqread syz-executor 40583 364587 56929 0 3 0x10008a sigsusp ksh 56929 106338 50514 0 3 0x98 kqread sshd-session 50514 225714 32413 0 3 0x92 kqread sshd-session 32413 84910 1 0 3 0x88 kqread sshd 57394 200747 18603 73 3 0x1100090 kqread syslogd 18603 254512 1 0 3 0x100082 sbwait syslogd 69111 133366 1 0 3 0x100080 kqread resolvd 2731 133850 15847 77 3 0x100092 kqread dhcpleased 78975 146296 15847 77 3 0x100092 kqread dhcpleased 15847 506460 1 0 3 0x80 kqread dhcpleased 56846 369125 0 0 2 0x14200 smr 85413 142491 0 0 2 0x14200 zerothread 74980 94089 0 0 3 0x14200 aiodoned aiodoned 82708 367493 0 0 3 0x14200 syncer update 79240 468669 0 0 3 0x14200 cleaner cleaner 33133 497586 0 0 3 0x14200 reaper reaper 51039 347432 0 0 3 0x14200 pgdaemon pagedaemon 2661 43541 0 0 3 0x14200 bored viomb 82352 75995 0 0 3 0x40014200 acpi0 acpi0 67006 489787 0 0 3 0x14200 bored softnet7 90136 411598 0 0 3 0x14200 bored softnet6 37185 467854 0 0 3 0x14200 bored softnet5 41931 32685 0 0 3 0x14200 bored softnet4 51435 503573 0 0 3 0x14200 bored softnet3 10179 329733 0 0 3 0x14200 bored softnet2 36048 69431 0 0 3 0x14200 bored softnet1 24628 370294 0 0 3 0x14200 bored softnet0 75653 68931 0 0 2 0x14200 systqmp 86502 471799 0 0 3 0x14200 bored systq 13286 99779 0 0 2 0x40014200 softclock 80235 17869 0 0 3 0x40014200 idle0 1 459201 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 11061K 11594K 166960K 12971 0 pcb 18 16K 18K 166960K 624 0 rtable 227 11K 12K 166960K 694 0 pf 36 14K 131086K 166960K 312 0 ifaddr 39 7K 8K 166960K 160 0 ifgroup 52 2K 2K 166960K 274 0 sysctl 4 1K 9K 166960K 81 0 counters 34 17K 18K 166960K 223 0 ioctlops 0 0K 4K 166960K 572 0 iov 0 0K 28K 166960K 199 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1454 91K 91K 166960K 2958 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 53 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 145 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 2199 0 sigio 0 0K 0K 166960K 49 0 proc 63 67K 108K 166960K 784 0 subproc 72 4K 4K 166960K 110 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 553 0 in_multi 87 6K 7K 166960K 234 0 ether_multi 1 0K 0K 166960K 24 0 mrt 1 0K 0K 166960K 18 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 696 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 238 152K 165K 166960K 20456 0 UVM aobj 39 2K 2K 166960K 43 0 pinsyscall 39 78K 94K 166960K 3387 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 147 0 NDP 12 0K 2K 166960K 114 0 temp 78 8644K 8720K 166960K 98774 0 kqueue 13 20K 35K 166960K 390 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 256 0 252 2 0 2 2 0 8 1 rtentry 136 209 0 125 4 0 4 4 0 8 0 unpcb 144 1658 0 1640 6 0 6 6 0 8 5 syncache 336 21 0 21 1 0 1 1 0 8 1 tcpqe 32 11 0 11 1 0 1 1 0 8 1 tcpcb 736 827 0 811 8 0 8 8 0 8 5 arp 88 29 0 17 1 0 1 1 0 8 0 ipq 40 5 0 4 1 0 1 1 0 8 0 ipqe 40 8 0 7 1 0 1 1 0 8 0 inpcb 328 2601 0 2581 11 0 11 11 0 8 8 ip6q 72 12 0 8 1 0 1 1 0 8 0 ip6af 40 22 0 18 1 0 1 1 0 8 0 nd6 104 37 0 19 1 0 1 1 0 8 0 pkpcb 40 23 0 23 1 0 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 5 0 4 1 0 1 1 0 8 0 ppxss 1072 166 0 164 1 0 1 1 0 8 0 pppxif 1384 79 0 79 1 0 1 1 0 8 1 pfstscr 40 4 0 4 1 0 1 1 0 8 1 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 4 0 3 1 0 1 1 0 8 0 pfanchor 1288 2 0 1 1 0 1 1 0 8 0 pftag 88 6 0 1 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 8 0 6 1 0 1 1 0 8 0 pfstate 384 5 0 4 1 0 1 1 0 8 0 pfrule 1344 45 0 43 1 0 1 1 0 8 0 rttmr 136 4 0 3 1 0 1 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 959 0 536 30 0 30 30 0 8 2 art_table 40 964 0 536 5 0 5 5 0 8 0 art_node 32 208 0 136 1 0 1 1 0 8 0 sysvmsgpl 40 115 0 109 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 142 0 132 1 0 1 1 0 8 0 shmpl 112 40 0 4 2 0 2 2 0 8 0 dirhash 1024 36 0 19 3 0 3 3 0 8 0 dino2pl 256 5666 0 4164 95 0 95 95 0 8 0 ffsino 256 5666 0 4164 95 0 95 95 0 8 0 nchpl 144 8952 0 8371 63 33 30 63 0 8 8 rtmask 32 19 0 19 1 0 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 31868 0 31868 2 0 2 2 0 8 2 kstatmem 264 178 0 154 2 0 2 2 0 8 0 scsiplug 72 7 0 7 1 0 1 1 0 8 1 scxspl 216 37447 0 37447 8 0 8 8 1 8 8 plimitpl 152 570 0 552 1 0 1 1 0 8 0 sigapl 424 2510 0 2458 9 0 9 9 0 8 2 knotepl 120 233009 0 232962 22 11 11 17 0 8 7 kqueuepl 184 924 0 915 4 0 4 4 0 8 3 pipepl 304 363 0 336 3 0 3 3 0 8 0 fdescpl 448 2444 0 2414 5 0 5 5 0 8 1 filepl 120 17896 0 17672 13 0 13 13 0 8 4 lockfpl 104 1305 0 1303 2 0 2 2 0 8 1 lockfspl 48 382 0 380 1 0 1 1 0 8 0 sessionpl 144 43 0 35 1 0 1 1 0 8 0 pgrppl 48 228 0 212 1 0 1 1 0 8 0 ucredpl 104 3515 0 3502 1 0 1 1 0 8 0 zombiepl 144 2459 0 2458 1 0 1 1 0 8 0 processpl 1168 2510 0 2458 6 0 6 6 0 8 0 procpl 664 5559 0 5496 8 0 8 8 0 8 2 sosppl 168 7 0 7 1 0 1 1 0 8 1 sockpl 552 4603 0 4561 14 2 12 13 0 8 8 mcl64k 65536 89 0 89 1 0 1 1 0 8 1 mcl16k 16384 4 0 4 1 0 1 1 0 8 1 mcl12k 12288 3 0 3 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 19 0 19 1 0 1 1 0 8 1 mcl4k 4096 5198 0 5148 13 0 13 13 0 8 6 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 3523 0 3516 6 0 6 6 0 8 4 mtagpl 96 46 0 15 1 0 1 1 0 8 0 mbufpl 256 27873 0 27701 21 0 21 21 0 8 4 bufpl 280 13028 0 6800 446 0 446 446 0 8 0 anonpl 24 372348 0 366420 73 0 73 73 0 187 24 amapchunkpl 152 70226 0 69649 31 0 31 31 0 158 8 amappl16 200 7723 0 7598 20 0 20 20 0 8 8 amappl15 192 8 0 7 1 0 1 1 0 8 0 amappl14 184 150 0 140 1 0 1 1 0 8 0 amappl13 176 22 0 22 1 0 1 1 0 8 1 amappl12 168 3114 0 3084 3 0 3 3 0 8 1 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 10 0 9 1 0 1 1 0 8 0 amappl9 144 257 0 257 1 0 1 1 0 8 1 amappl8 136 18 0 16 1 0 1 1 0 8 0 amappl7 128 134 0 124 1 0 1 1 0 8 0 amappl6 120 225 0 221 1 0 1 1 0 8 0 amappl5 112 127 0 120 1 0 1 1 0 8 0 amappl4 104 322 0 305 1 0 1 1 0 8 0 amappl3 96 14462 0 14348 4 0 4 4 0 8 0 amappl2 88 826 0 769 2 0 2 2 0 8 0 amappl1 80 18479 0 17929 13 0 13 13 0 8 0 amappl 88 19266 0 19092 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 1 0 1 1 0 8 1 dma128 128 256 0 256 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 8 0 8 1 0 1 1 0 8 1 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 42 0 4 1 0 1 1 0 8 0 uaddrrnd 24 2444 0 2414 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2444 0 2414 1 0 1 1 0 8 0 vmmpekpl 168 17762 0 17721 3 0 3 3 0 8 0 vmmpepl 168 157607 0 155592 99 0 99 99 0 357 6 vmsppl 368 2443 0 2414 4 0 4 4 0 8 1 rwobjpl 40 45577 0 38657 71 0 71 71 0 8 0 pdppl 4096 4894 0 4828 124 58 66 82 0 8 0 pvpl 32 1084500 0 1072864 152 0 152 152 0 265 35 pmappl 216 2443 0 2414 3 0 3 3 0 8 1 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 425 0 58 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace icmp_mtudisc_timeout(fffffd80770a42a8,0) at icmp_mtudisc_timeout+0x11d sys/netinet/ip_icmp.c:1102 rt_timer_queue_flush(ffffffff8393fb28) at rt_timer_queue_flush+0x28d sys/net/route.c:1586 ip_sysctl(ffff80003c99b56c,1,0,ffff80003c99b598,200000001300,4) at ip_sysctl+0x84c sys/netinet/ip_input.c:1750 net_sysctl(ffff80003c99b564,3,0,ffff80003c99b598,200000001300,4,7dba273b3d5de14c) at net_sysctl+0x64e sys/kern/uipc_domain.c:260 sys_sysctl(ffff80002a8234d8,ffff80003c99b6c0,ffff80003c99b610) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff80003c99b6c0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c99b6c0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x92850137d10, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace icmp_mtudisc_timeout(fffffd80770a42a8,0) at icmp_mtudisc_timeout+0x11d sys/netinet/ip_icmp.c:1102 rt_timer_queue_flush(ffffffff8393fb28) at rt_timer_queue_flush+0x28d sys/net/route.c:1586 ip_sysctl(ffff80003c99b56c,1,0,ffff80003c99b598,200000001300,4) at ip_sysctl+0x84c sys/netinet/ip_input.c:1750 net_sysctl(ffff80003c99b564,3,0,ffff80003c99b598,200000001300,4,7dba273b3d5de14c) at net_sysctl+0x64e sys/kern/uipc_domain.c:260 sys_sysctl(ffff80002a8234d8,ffff80003c99b6c0,ffff80003c99b610) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff80003c99b6c0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c99b6c0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x92850137d10, count: -7