kernel: protection fault trap, code=0 Stopped at sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace sys_msgrcv(ffff80002a7c7258,ffff80003a5a9280,ffff80003a5a91d0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7c7258,ffff80003a5a9280,ffff80003a5a91d0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003a5a9280) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003a5a9280) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc883c6d6a80, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003a5a91b0 rbx 0 rdx 0 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x96d3d9b2bd37d9d9 r11 0x3aabf908e60b8318 r12 0xfffffd805a619528 r13 0xdeafbeaddeafbead r14 0xffff8000015acf00 r15 0xa rip 0xffffffff831128d2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003a5a9110 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=115643 pid=97751 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7c74f0,0xffff80002a7c6570 process=0xffff80002cd2e4a8 user=0xffff80003a5a4000, vmspace=0xfffffd806ba2b460 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 31767 498429 60233 0 2 0x1 syz-executor 31767 520678 60233 0 3 0x4000080 fsleep syz-executor 97751 396026 85818 0 2 0 syz-executor *97751 115643 85818 0 7 0x4000000 syz-executor 97751 100855 85818 0 3 0x4000080 fsleep syz-executor 97751 28027 85818 0 2 0x4000000 syz-executor 75317 498670 952 0 2 0x1 syz-executor 75317 9979 952 0 3 0x4000080 fsleep syz-executor 8607 109257 91857 0 2 0x1 syz-executor 8607 502522 91857 0 3 0x4000080 fsleep syz-executor 8539 485097 97893 0 2 0x1 syz-executor 8539 493272 97893 0 3 0x4000080 fsleep syz-executor 56109 256159 41159 0 2 0x1 syz-executor 56109 283143 41159 0 3 0x4000080 fsleep syz-executor 56109 70172 41159 0 3 0x4000080 fsleep syz-executor 56109 144953 41159 0 3 0x4000080 fsleep syz-executor 55014 447054 93037 0 2 0x10 syz-executor 55014 114916 93037 0 3 0x4000090 fsleep syz-executor 55014 238538 93037 0 3 0x4000090 fsleep syz-executor 55014 390951 93037 0 3 0x4000090 fsleep syz-executor 77785 160084 0 0 3 0x14200 bored sosplice 97893 342450 12791 0 3 0x82 nanoslp syz-executor 60233 60888 12791 0 3 0x82 nanoslp syz-executor 41159 442760 12791 0 3 0x82 nanoslp syz-executor 93037 254620 12791 0 3 0x82 nanoslp syz-executor 1885 436752 12791 0 2 0x2 syz-executor 91857 48115 12791 0 3 0x82 nanoslp syz-executor 952 9377 12791 0 3 0x82 nanoslp syz-executor 85818 426314 12791 0 3 0x82 nanoslp syz-executor 12791 177907 8889 0 3 0x82 kqread syz-executor 8889 52308 85808 0 3 0x10008a sigsusp ksh 85808 7948 77612 0 3 0x98 kqread sshd-session 77612 237149 27174 0 3 0x92 kqread sshd-session 94680 408065 1 0 3 0x100083 ttyin getty 27174 154244 1 0 3 0x88 kqread sshd 86629 12268 25397 73 3 0x1100090 kqread syslogd 25397 199201 1 0 3 0x100082 sbwait syslogd 46449 372179 1 0 3 0x100080 kqread resolvd 3719 501847 69169 77 3 0x100092 kqread dhcpleased 73550 366617 69169 77 3 0x100092 kqread dhcpleased 69169 226999 1 0 3 0x80 kqread dhcpleased 50768 368972 0 0 3 0x14200 bored smr 71251 85234 0 0 2 0x14200 zerothread 94123 389302 0 0 3 0x14200 aiodoned aiodoned 70595 224619 0 0 3 0x14200 syncer update 22234 188536 0 0 3 0x14200 cleaner cleaner 8873 521365 0 0 3 0x14200 reaper reaper 40566 459662 0 0 3 0x14200 pgdaemon pagedaemon 75117 367915 0 0 3 0x14200 bored viomb 50518 41217 0 0 3 0x40014200 acpi0 acpi0 24116 50059 0 0 3 0x14200 bored softnet7 20417 264404 0 0 3 0x14200 bored softnet6 40614 282772 0 0 3 0x14200 bored softnet5 84350 148294 0 0 3 0x14200 bored softnet4 44662 157516 0 0 3 0x14200 bored softnet3 20034 317598 0 0 3 0x14200 bored softnet2 59235 118117 0 0 3 0x14200 bored softnet1 68576 197231 0 0 3 0x14200 bored softnet0 27741 106516 0 0 3 0x14200 bored systqmp 65784 479897 0 0 3 0x14200 bored systq 48193 99082 0 0 3 0x40014200 tmoslp softclock 1471 158547 0 0 3 0x40014200 idle0 1 100502 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 10210 11049K 11313K 166960K 12083 0 pcb 19 16K 20K 166960K 352 0 rtable 166 7K 7K 166960K 397 0 pf 28 12K 16K 166960K 87 0 ifaddr 32 5K 7K 166960K 80 0 ifgroup 46 2K 2K 166960K 110 0 sysctl 3 1K 9K 166960K 18 0 counters 31 17K 18K 166960K 68 0 ioctlops 0 0K 4K 166960K 261 0 iov 0 0K 28K 166960K 109 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1440 91K 91K 166960K 2118 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 43 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 908 0 sigio 0 0K 0K 166960K 12 0 proc 60 59K 124K 166960K 609 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 137 0 in_multi 66 4K 7K 166960K 140 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 425 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 66 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 233 159K 174K 166960K 9499 0 UVM aobj 21 6K 6K 166960K 24 0 pinsyscall 38 76K 96K 166960K 1930 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 35 0 NDP 10 0K 2K 166960K 54 0 temp 76 8644K 8887K 166960K 43785 0 kqueue 13 20K 28K 166960K 160 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 120 129 0 125 1 0 1 1 0 8 0 rtentry 136 127 0 66 4 0 4 4 0 8 0 unpcb 144 642 0 622 3 0 3 3 0 8 2 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpcb 736 227 0 222 4 0 4 4 0 8 3 arp 88 16 0 6 1 0 1 1 0 8 0 inpcb 328 908 0 896 8 1 7 7 0 8 5 ip6q 72 5 0 4 2 1 1 1 0 8 0 ip6af 40 13 0 10 2 1 1 1 0 8 0 nd6 104 21 0 11 1 0 1 1 0 8 0 pkpcb 40 43 0 43 2 1 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1072 30 0 30 2 1 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 pftag 88 2 0 0 1 0 1 1 0 8 0 pfrule 1344 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 604 0 329 31 4 27 28 0 8 7 art_table 40 606 0 329 5 0 5 5 0 8 0 art_node 32 126 0 74 1 0 1 1 0 8 0 sysvmsgpl 40 45 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 37 0 27 1 0 1 1 0 8 0 shmpl 112 21 0 3 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 3025 0 1526 95 0 95 95 0 8 0 ffsino 256 3025 0 1526 95 0 95 95 0 8 0 nchpl 144 4218 0 2538 63 0 63 63 0 8 0 rtmask 32 6 0 6 2 1 1 1 0 8 1 uvmvnodes 80 3512 0 0 72 0 72 72 0 8 0 vnodes 216 3512 0 0 196 0 196 196 0 8 0 namei 1024 14656 0 14656 3 1 2 2 0 8 2 kstatmem 264 68 0 48 2 0 2 2 0 8 0 scsiplug 72 6 0 6 2 1 1 1 0 8 1 scxspl 216 17256 0 17256 15 7 8 8 1 8 8 plimitpl 152 316 0 300 1 0 1 1 0 8 0 sigapl 424 1135 0 1085 7 1 6 7 0 8 0 knotepl 120 38276 0 38229 22 12 10 15 0 8 8 kqueuepl 184 318 0 309 3 0 3 3 0 8 2 pipepl 304 149 0 121 3 0 3 3 0 8 0 fdescpl 448 1113 0 1084 5 1 4 5 0 8 0 filepl 120 7027 0 6808 12 2 10 10 0 8 1 lockfpl 104 299 0 296 1 0 1 1 0 8 0 lockfspl 48 131 0 128 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 40 0 24 1 0 1 1 0 8 0 ucredpl 104 1360 0 1347 1 0 1 1 0 8 0 zombiepl 144 1557 0 1557 1 0 1 1 0 8 1 processpl 1168 1135 0 1085 5 1 4 5 0 8 0 procpl 664 2415 0 2352 9 1 8 8 0 8 1 sosppl 168 1 0 0 1 0 1 1 0 8 0 sockpl 552 1775 0 1739 11 1 10 10 0 8 7 mcl64k 65536 33 0 33 2 1 1 1 0 8 1 mcl16k 16384 4 0 4 2 1 1 1 0 8 1 mcl12k 12288 3 0 3 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 11 0 11 2 1 1 1 0 8 1 mcl4k 4096 3412 0 3361 15 7 8 14 0 8 1 mcl2k 2048 1144 0 1138 3 1 2 2 0 8 1 mtagpl 96 16 0 9 1 0 1 1 0 8 0 mbufpl 256 10935 0 10737 16 0 16 16 0 8 2 bufpl 280 7871 0 1643 446 0 446 446 0 8 0 anonpl 24 184629 0 181411 68 21 47 52 0 187 14 amapchunkpl 152 30960 0 30458 34 3 31 31 0 158 9 amappl16 200 3550 0 3512 31 18 13 18 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 105 0 95 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1760 0 1731 3 1 2 3 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 1 0 1 1 1 0 1 0 8 0 amappl9 144 255 0 254 2 1 1 1 0 8 0 amappl8 136 37 0 36 1 0 1 1 0 8 0 amappl7 128 100 0 90 1 0 1 1 0 8 0 amappl6 120 190 0 187 1 0 1 1 0 8 0 amappl5 112 124 0 117 1 0 1 1 0 8 0 amappl4 104 271 0 255 1 0 1 1 0 8 0 amappl3 96 6136 0 6022 4 0 4 4 0 8 0 amappl2 88 640 0 584 2 0 2 2 0 8 0 amappl1 80 10997 0 10441 13 1 12 13 0 8 0 amappl 88 8686 0 8518 6 1 5 5 0 92 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 4 0 3 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 2 1 1 1 0 8 1 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 23 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1113 0 1084 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1113 0 1084 1 0 1 1 0 8 0 vmmpekpl 168 9983 0 9951 2 0 2 2 0 8 0 vmmpepl 168 75088 0 73206 107 11 96 97 0 357 10 vmsppl 368 1112 0 1084 4 1 3 4 0 8 0 rwobjpl 40 25301 0 20896 46 0 46 46 0 8 1 pdppl 4096 2232 0 2168 104 38 66 82 0 8 2 pvpl 32 494778 0 486085 143 29 114 121 0 265 21 pmappl 216 1112 0 1084 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 397 0 61 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a7c7258,ffff80003a5a9280,ffff80003a5a91d0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7c7258,ffff80003a5a9280,ffff80003a5a91d0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003a5a9280) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003a5a9280) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc883c6d6a80, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a7c7258,ffff80003a5a9280,ffff80003a5a91d0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7c7258,ffff80003a5a9280,ffff80003a5a91d0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003a5a9280) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003a5a9280) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc883c6d6a80, count: -3