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(ffff80002a7f9778,ffff80003c977e30,ffff80003c977d80) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f9778,ffff80003c977e30,ffff80003c977d80) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c977e30) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c977e30) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x22201752140, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c977d60 rbx 0 rdx 0xffff800001464380 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x451be745b976ffac r11 0xb20a42c6b134064c r12 0xfffffd8068586e38 r13 0xdead4110dead4110 r14 0xffff8000014f6e00 r15 0xa rip 0xffffffff821a3172 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c977cc0 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=463129 pid=82395 tcnt=5 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=80, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7e0018,0xffff80002a7f8fc0 process=0xffff80002f132dc0 user=0xffff80003c972000, vmspace=0xfffffd8069e2c468 estcpu=30, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 31109 177603 41128 0 2 0 syz-executor 31109 393483 41128 0 2 0x4000000 syz-executor 31109 61826 41128 0 3 0x4000080 fsleep syz-executor 53850 493274 62860 0 3 0x80 nanoslp syz-executor 53850 35571 62860 0 3 0x4000080 bell syz-executor 82395 218737 97004 0 2 0 syz-executor *82395 463129 97004 0 7 0x4000000 syz-executor 82395 177544 97004 0 2 0x4000000 syz-executor 82395 202576 97004 0 3 0x4000080 fsleep syz-executor 82395 111181 97004 0 2 0x4000000 syz-executor 97776 209249 0 0 3 0x14200 bored sosplice 85255 445068 27981 0 2 0x2 syz-executor 92849 25443 27981 0 3 0x82 nanoslp syz-executor 30469 136262 27981 0 3 0x82 nanoslp syz-executor 41128 339285 27981 0 3 0x82 nanoslp syz-executor 97004 233093 27981 0 3 0x82 nanoslp syz-executor 62860 432044 27981 0 3 0x82 nanoslp syz-executor 96300 184581 27981 0 2 0x2 syz-executor 23549 358824 27981 0 2 0x3 syz-executor 27981 50529 22057 0 3 0x82 kqread syz-executor 22057 244776 13812 0 3 0x10008a sigsusp ksh 13812 69137 12703 0 3 0x98 kqread sshd-session 12703 493354 60076 0 3 0x92 kqread sshd-session 84587 107295 1 0 3 0x100083 ttyin getty 60076 10786 1 0 3 0x88 kqread sshd 54069 106726 19113 73 3 0x1100090 kqread syslogd 19113 132478 1 0 3 0x100082 sbwait syslogd 23219 519454 1 0 3 0x100080 kqread resolvd 46696 195658 30016 77 3 0x100092 kqread dhcpleased 85579 202040 30016 77 3 0x100092 kqread dhcpleased 30016 423999 1 0 3 0x80 kqread dhcpleased 42516 360500 0 0 3 0x14200 bored smr 27283 18859 0 0 2 0x14200 zerothread 77265 10772 0 0 3 0x14200 aiodoned aiodoned 29296 363688 0 0 3 0x14200 syncer update 36763 132059 0 0 3 0x14200 cleaner cleaner 19142 462552 0 0 3 0x14200 reaper reaper 97477 481593 0 0 3 0x14200 pgdaemon pagedaemon 48475 25939 0 0 3 0x14200 bored viomb 32053 175099 0 0 3 0x40014200 acpi0 acpi0 78766 194115 0 0 3 0x14200 bored softnet7 24196 313142 0 0 3 0x14200 bored softnet6 55659 198497 0 0 3 0x14200 bored softnet5 677 112643 0 0 3 0x14200 bored softnet4 27609 366473 0 0 3 0x14200 bored softnet3 77458 60553 0 0 3 0x14200 bored softnet2 87065 310203 0 0 3 0x14200 bored softnet1 80234 288139 0 0 3 0x14200 bored softnet0 48401 496504 0 0 3 0x14200 bored systqmp 32621 1277 0 0 3 0x14200 bored systq 62059 459928 0 0 3 0x40014200 tmoslp softclock 38834 27931 0 0 3 0x40014200 idle0 1 398112 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 10197 11113K 11369K 166960K 11735 0 pcb 18 13K 13K 166960K 97 0 rtable 219 9K 10K 166960K 333 0 pf 33 13K 14K 166960K 98 0 ifaddr 41 7K 8K 166960K 64 0 ifgroup 54 2K 2K 166960K 99 0 sysctl 4 1K 9K 166960K 11 0 counters 33 17K 18K 166960K 52 0 ioctlops 0 0K 4K 166960K 109 0 iov 0 0K 16K 166960K 19 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1339 84K 85K 166960K 1722 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 23 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 89K 166960K 479 0 sigio 0 0K 0K 166960K 75 0 proc 63 67K 108K 166960K 494 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 106 0 in_multi 92 6K 7K 166960K 116 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 115 519K 519K 166960K 115 0 exec 0 0K 1K 166960K 406 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 219 163K 181K 166960K 5900 0 UVM aobj 13 2K 2K 166960K 14 0 pinsyscall 37 74K 92K 166960K 1506 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 14 0 NDP 12 0K 2K 166960K 41 0 temp 45 8636K 8703K 166960K 18258 0 kqueue 13 20K 32K 166960K 102 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 120 118 0 115 3 2 1 3 0 8 0 rtentry 136 106 0 17 4 0 4 4 0 8 0 unpcb 144 223 0 208 1 0 1 1 0 8 0 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 169 0 164 1 0 1 1 0 8 0 arp 88 11 0 1 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 419 0 410 4 2 2 4 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 4 0 4 1 1 0 1 0 8 0 nd6 104 21 0 4 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 12 0 12 1 1 0 1 0 8 0 pppxif 1384 3 0 3 1 1 0 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstkey 128 2 0 2 1 1 0 1 0 8 0 pfstate 384 1 0 1 1 1 0 1 0 8 0 pfrule 1344 2 0 1 1 0 1 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 533 0 121 31 3 28 31 0 8 0 art_table 40 534 0 121 5 0 5 5 0 8 0 art_node 32 105 0 25 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 11 0 1 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2305 0 805 95 0 95 95 0 8 0 ffsino 256 2305 0 805 95 0 95 95 0 8 0 nchpl 144 2978 0 1301 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 uvmvnodes 80 2535 0 0 52 0 52 52 0 8 0 vnodes 216 2535 0 0 141 0 141 141 0 8 0 namei 1024 9128 0 9127 1 0 1 1 0 8 0 kstatmem 264 50 0 26 2 0 2 2 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 9917 0 9917 15 14 1 8 1 8 1 plimitpl 152 118 0 102 1 0 1 1 0 8 0 sigapl 424 763 0 714 7 1 6 7 0 8 0 knotepl 120 17611 0 17564 30 20 10 16 0 8 7 kqueuepl 184 206 0 197 2 1 1 2 0 8 0 pipepl 304 189 0 162 8 5 3 8 0 8 0 fdescpl 448 741 0 713 5 1 4 5 0 8 0 filepl 120 3730 0 3516 12 4 8 11 0 8 0 lockfpl 104 170 0 168 1 0 1 1 0 8 0 lockfspl 48 67 0 65 1 0 1 1 0 8 0 sessionpl 144 22 0 14 1 0 1 1 0 8 0 pgrppl 48 33 0 17 1 0 1 1 0 8 0 ucredpl 104 790 0 778 1 0 1 1 0 8 0 zombiepl 144 777 0 775 1 0 1 1 0 8 0 processpl 1168 763 0 714 5 1 4 5 0 8 0 procpl 664 1325 0 1269 6 0 6 6 0 8 1 sosppl 168 4 0 4 2 1 1 1 0 8 1 sockpl 552 769 0 742 8 5 3 8 0 8 0 mcl64k 65536 17 0 17 3 2 1 1 0 8 1 mcl8k 8192 6 0 6 2 2 0 1 0 8 0 mcl4k 4096 2896 0 2845 16 8 8 15 0 8 1 mcl2k 2048 634 0 628 5 3 2 3 0 8 1 mtagpl 96 11 0 6 1 0 1 1 0 8 0 mbufpl 256 7377 0 7195 16 0 16 16 0 8 1 bufpl 280 3564 0 118 247 0 247 247 0 8 0 anonpl 24 128009 0 124950 48 22 26 44 0 187 0 amapchunkpl 152 18767 0 18331 33 11 22 30 0 158 2 amappl16 200 2131 0 2105 17 14 3 14 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 136 0 126 1 0 1 1 0 8 0 amappl13 176 21 0 21 1 1 0 1 0 8 0 amappl12 168 1349 0 1322 2 0 2 2 0 8 0 amappl11 160 59 0 49 1 0 1 1 0 8 0 amappl10 152 5 0 4 1 0 1 1 0 8 0 amappl9 144 248 0 247 1 0 1 1 0 8 0 amappl8 136 35 0 34 1 0 1 1 0 8 0 amappl7 128 96 0 86 1 0 1 1 0 8 0 amappl6 120 170 0 167 1 0 1 1 0 8 0 amappl5 112 116 0 109 1 0 1 1 0 8 0 amappl4 104 273 0 257 1 0 1 1 0 8 0 amappl3 96 3433 0 3335 4 0 4 4 0 8 0 amappl2 88 615 0 561 2 0 2 2 0 8 0 amappl1 80 9411 0 8885 13 0 13 13 0 8 0 amappl 88 5182 0 5029 5 0 5 5 0 92 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 7 0 7 2 2 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 13 0 1 1 0 1 1 0 8 0 uaddrrnd 24 741 0 713 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 741 0 713 1 0 1 1 0 8 0 vmmpekpl 168 7505 0 7479 2 0 2 2 0 8 0 vmmpepl 168 51828 0 50081 95 11 84 93 0 357 2 vmsppl 368 740 0 713 4 1 3 4 0 8 0 rwobjpl 40 18289 0 14920 35 0 35 35 0 8 0 pdppl 4096 1488 0 1426 98 32 66 78 0 8 4 pvpl 32 338532 0 330345 115 31 84 115 0 265 1 pmappl 216 740 0 713 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 387 0 58 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a7f9778,ffff80003c977e30,ffff80003c977d80) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f9778,ffff80003c977e30,ffff80003c977d80) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c977e30) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c977e30) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x22201752140, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a7f9778,ffff80003c977e30,ffff80003c977d80) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f9778,ffff80003c977e30,ffff80003c977d80) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c977e30) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c977e30) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x22201752140, count: -3