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(ffff800031d3efb8,ffff80003c9973f0,ffff80003c997340) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff800031d3efb8,ffff80003c9973f0,ffff80003c997340) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c9973f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9973f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe02f78ccd00, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c997320 rbx 0 rdx 0xffff800001435500 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0xb8ae50c95fcb71e1 r11 0xa56d3f8561c55fb4 r12 0xfffffd806d8a2eb0 r13 0xdead4110dead4110 r14 0xffff80000157d400 r15 0xa rip 0xffffffff81c4df02 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c997280 ss 0 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=243733 pid=99908 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=83, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800031d3ea88,0xffff800031d3fcc0 process=0xffff80002cd2edc8 user=0xffff80003c992000, vmspace=0xfffffd806ba512f0 estcpu=33, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 61714 489252 82475 60928 2 0x10 syz-executor 61714 518805 82475 60928 3 0x4000010 biowait syz-executor 10177 480032 58674 0 2 0 syz-executor 10177 485066 58674 0 3 0x4000080 fsleep syz-executor 64116 409646 77783 60929 2 0x10 syz-executor 64116 435236 77783 60929 3 0x4000090 bell syz-executor 64116 225806 77783 60929 3 0x4000090 fsleep syz-executor 64060 269169 61788 0 2 0 syz-executor 64060 268707 61788 0 3 0x4000080 tuninit syz-executor 64060 331826 61788 0 2 0x4000000 syz-executor 64060 296147 61788 0 2 0x4000000 syz-executor 99908 387750 18950 0 2 0 syz-executor *99908 243733 18950 0 7 0x4000000 syz-executor 99908 200297 18950 0 3 0x4000080 fsleep syz-executor 99908 249433 18950 0 2 0x4000000 syz-executor 57345 100265 89752 60929 2 0x10 syz-executor 57345 400312 89752 60929 3 0x4000090 fsleep syz-executor 57345 341672 89752 60929 3 0x4000090 fsleep syz-executor 57345 284642 89752 60929 3 0x4000090 fsleep syz-executor 58532 142436 0 0 3 0x14280 nfsidl nfsio 5382 64070 0 0 3 0x14280 nfsidl nfsio 71015 51676 0 0 3 0x14280 nfsidl nfsio 78038 422060 0 0 3 0x14280 nfsidl nfsio 46517 251173 0 0 3 0x14280 nfsidl nfsio 65167 451597 0 0 3 0x14280 nfsidl nfsio 59543 304937 0 0 3 0x14280 nfsidl nfsio 9240 1921 0 0 3 0x14280 nfsidl nfsio 5065 223766 0 0 3 0x14280 nfsidl nfsio 15596 302293 0 0 3 0x14280 nfsidl nfsio 93432 222671 0 0 3 0x14280 nfsidl nfsio 18972 483809 0 0 3 0x14280 nfsidl nfsio 94738 460439 0 0 3 0x14280 nfsidl nfsio 69530 403174 0 0 3 0x14280 nfsidl nfsio 150 420146 0 0 3 0x14280 nfsidl nfsio 46755 58169 0 0 3 0x14280 nfsidl nfsio 42480 374488 0 0 3 0x14280 nfsidl nfsio 40139 317232 0 0 3 0x14280 nfsidl nfsio 95426 290385 0 0 3 0x14280 nfsidl nfsio 84551 521137 0 0 3 0x14280 nfsidl nfsio 49082 261374 1 0 3 0x100083 ttyin getty 77783 246886 70043 0 3 0x82 nanoslp syz-executor 15963 336182 0 0 3 0x14200 bored sosplice 58674 61074 70043 0 3 0x82 nanoslp syz-executor 77199 479905 70043 0 2 0x2 syz-executor 82475 64298 70043 0 3 0x82 nanoslp syz-executor 61788 160010 70043 0 3 0x82 nanoslp syz-executor 18950 37163 70043 0 3 0x82 nanoslp syz-executor 89752 378055 70043 0 3 0x82 nanoslp syz-executor 70043 251434 3751 0 2 0x2 syz-executor 3751 165972 11156 0 3 0x10008a sigsusp ksh 11156 283589 2859 0 3 0x98 kqread sshd-session 2859 90549 68401 0 3 0x92 kqread sshd-session 68401 82892 1 0 3 0x88 kqread sshd 90287 3213 16990 73 3 0x1100090 kqread syslogd 16990 298989 1 0 3 0x100082 sbwait syslogd 32517 508578 1 0 3 0x100080 kqread resolvd 14797 346751 80201 77 3 0x100092 kqread dhcpleased 28700 93997 80201 77 3 0x100092 kqread dhcpleased 80201 70310 1 0 3 0x80 kqread dhcpleased 18465 173571 0 0 3 0x14200 bored smr 38037 17888 0 0 2 0x14200 zerothread 24878 325147 0 0 3 0x14200 aiodoned aiodoned 4627 38869 0 0 3 0x14200 syncer update 98653 186934 0 0 3 0x14200 cleaner cleaner 93272 260278 0 0 3 0x14200 reaper reaper 13108 159916 0 0 3 0x14200 pgdaemon pagedaemon 3639 465629 0 0 3 0x14200 bored viomb 59312 61418 0 0 3 0x40014200 acpi0 acpi0 46910 247092 0 0 3 0x14200 bored softnet7 99098 423684 0 0 3 0x14200 bored softnet6 35732 455016 0 0 3 0x14200 bored softnet5 68684 407522 0 0 3 0x14200 bored softnet4 91953 248563 0 0 3 0x14200 bored softnet3 83967 169932 0 0 3 0x14200 bored softnet2 51908 258583 0 0 3 0x14200 bored softnet1 40012 508844 0 0 3 0x14200 bored softnet0 96782 70815 0 0 3 0x14200 bored systqmp 4005 92563 0 0 3 0x14200 bored systq 42571 242326 0 0 3 0x40014200 tmoslp softclock 80869 134953 0 0 3 0x40014200 idle0 1 317093 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 10188 11051K 11619K 166960K 12283 0 pcb 18 14K 14K 166960K 261 0 rtable 216 9K 9K 166960K 594 0 pf 32 13K 20K 166960K 194 0 ifaddr 42 8K 8K 166960K 135 0 ifgroup 50 2K 2K 166960K 206 0 sysctl 4 1K 9K 166960K 11 0 counters 33 17K 18K 166960K 142 0 ioctlops 0 0K 4K 166960K 402 0 iov 0 0K 28K 166960K 124 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1496 94K 94K 166960K 2264 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 39 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 1064 0 sigio 0 0K 0K 166960K 19 0 proc 60 59K 91K 166960K 753 0 subproc 72 4K 4K 166960K 135 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 94 0 in_multi 98 7K 7K 166960K 209 0 ether_multi 1 0K 0K 166960K 9 0 mrt 2 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 604 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 233 151K 170K 166960K 10969 0 UVM aobj 27 2K 2K 166960K 31 0 pinsyscall 37 74K 95K 166960K 2297 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 47 0 NDP 13 0K 2K 166960K 96 0 temp 74 8643K 8708K 166960K 63573 0 kqueue 13 20K 34K 166960K 194 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 120 142 0 138 2 0 2 2 0 8 1 rtentry 136 221 0 134 4 0 4 4 0 8 0 unpcb 144 650 0 631 6 0 6 6 0 8 5 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 736 437 0 430 10 6 4 7 0 8 2 arp 88 22 0 8 1 0 1 1 0 8 0 ipq 40 5 0 2 1 0 1 1 0 8 0 ipqe 40 9 0 6 1 0 1 1 0 8 0 inpcb 328 1262 0 1250 15 5 10 10 0 8 8 ip6q 72 5 0 1 1 0 1 1 0 8 0 ip6af 40 9 0 4 1 0 1 1 0 8 0 nd6 104 37 0 19 1 0 1 1 0 8 0 pkpcb 40 9 0 9 2 1 1 1 0 8 1 kcovpl 48 15 0 7 1 0 1 1 0 8 0 ppxss 1072 89 0 89 2 1 1 1 0 8 1 pppxif 1384 6 0 6 1 0 1 1 0 8 1 pfstscr 40 5 0 4 1 0 1 1 0 8 0 pfanchor 1288 6 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 7 0 5 1 0 1 1 0 8 0 pfstate 384 4 0 3 1 0 1 1 0 8 0 pfrule 1344 6 0 6 2 1 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1122 0 682 40 5 35 39 0 8 7 art_table 40 1123 0 682 7 0 7 7 0 8 2 art_node 32 219 0 143 1 0 1 1 0 8 0 sysvmsgpl 40 44 0 41 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 37 0 27 1 0 1 1 0 8 0 shmpl 112 28 0 4 1 0 1 1 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 3378 0 1866 95 0 95 95 0 8 0 ffsino 256 3378 0 1866 95 0 95 95 0 8 0 nchpl 144 4734 0 3025 64 0 64 64 0 8 0 rtmask 32 9 0 9 2 1 1 1 0 8 1 uvmvnodes 80 3875 0 0 80 0 80 80 0 8 0 vnodes 216 3875 0 0 216 0 216 216 0 8 0 namei 1024 17621 0 17620 4 1 3 3 0 8 2 kstatmem 264 132 0 108 3 0 3 3 0 8 1 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 17712 0 17711 10 7 3 8 1 8 2 plimitpl 152 420 0 403 1 0 1 1 0 8 0 sigapl 424 1363 0 1294 10 1 9 9 0 8 1 knotepl 120 317576 0 317528 26 14 12 17 0 8 8 kqueuepl 184 427 0 418 4 0 4 4 0 8 3 pipepl 304 190 0 163 3 0 3 3 0 8 0 fdescpl 448 1318 0 1290 5 1 4 5 0 8 0 filepl 120 8729 0 8509 12 1 11 11 0 8 2 lockfpl 104 413 0 410 2 0 2 2 0 8 1 lockfspl 48 191 0 188 1 0 1 1 0 8 0 sessionpl 144 32 0 24 1 0 1 1 0 8 0 pgrppl 48 64 0 48 1 0 1 1 0 8 0 ucredpl 104 1582 0 1568 1 0 1 1 0 8 0 zombiepl 144 1728 0 1727 1 0 1 1 0 8 0 processpl 1168 1363 0 1294 7 1 6 6 0 8 0 procpl 664 2806 0 2724 8 0 8 8 0 8 0 sosppl 168 5 0 5 1 0 1 1 0 8 1 sockpl 552 2114 0 2079 17 6 11 12 0 8 8 mcl64k 65536 83 0 81 3 1 2 2 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 2 1 1 1 0 8 1 mcl8k 8192 15 0 15 2 1 1 1 0 8 1 mcl4k 4096 3566 0 3517 15 7 8 14 0 8 1 mcl2k 2048 1925 0 1921 11 4 7 7 0 8 5 mtagpl 96 6 0 6 2 1 1 1 0 8 1 mbufpl 256 14167 0 14009 20 0 20 20 0 8 6 bufpl 280 6428 0 200 446 0 446 446 0 8 0 anonpl 24 204862 0 196574 87 0 87 87 0 187 10 amapchunkpl 152 35780 0 35219 32 0 32 32 0 158 8 amappl16 200 3666 0 3405 30 0 30 30 0 8 4 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 130 0 120 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 2042 0 2014 3 1 2 3 0 8 0 amappl11 160 43 0 33 1 0 1 1 0 8 0 amappl10 152 4 0 3 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 17 0 15 1 0 1 1 0 8 0 amappl7 128 111 0 101 1 0 1 1 0 8 0 amappl6 120 240 0 237 1 0 1 1 0 8 0 amappl5 112 139 0 132 1 0 1 1 0 8 0 amappl4 104 301 0 285 1 0 1 1 0 8 0 amappl3 96 7072 0 6968 4 0 4 4 0 8 0 amappl2 88 732 0 677 2 0 2 2 0 8 0 amappl1 80 12839 0 12295 15 1 14 14 0 8 0 amappl 88 10027 0 9857 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 7 0 7 1 1 0 1 0 8 0 dma128 128 256 0 256 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 30 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1318 0 1290 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1318 0 1290 1 0 1 1 0 8 0 vmmpekpl 168 11683 0 11642 3 0 3 3 0 8 0 vmmpepl 168 89345 0 87273 109 1 108 108 0 357 6 vmsppl 368 1317 0 1290 4 1 3 4 0 8 0 rwobjpl 40 28286 0 23300 52 0 52 52 0 8 1 pdppl 4096 2642 0 2580 106 38 68 80 0 8 6 pvpl 32 576160 0 561466 183 14 169 169 0 265 27 pmappl 216 1317 0 1290 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 428 0 69 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff800031d3efb8,ffff80003c9973f0,ffff80003c997340) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff800031d3efb8,ffff80003c9973f0,ffff80003c997340) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c9973f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9973f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe02f78ccd00, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff800031d3efb8,ffff80003c9973f0,ffff80003c997340) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff800031d3efb8,ffff80003c9973f0,ffff80003c997340) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c9973f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9973f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe02f78ccd00, count: -3