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(ffff80003854aa88,ffff80003c983ee0,ffff80003c983e30) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003854aa88,ffff80003c983ee0,ffff80003c983e30) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c983ee0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c983ee0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x485f94100e0, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c983e10 rbx 0 rdx 0xffff800001464f40 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x7f1aaf6e2128c06d r11 0x466abf529bba26d1 r12 0xfffffd806872de60 r13 0xdeafbeaddeafbead r14 0xffff800001495800 r15 0xa rip 0xffffffff82bc26c2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c983d70 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=232983 pid=78450 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=79, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003854b250,0xffff80003c9b8040 process=0xffff80002cd30db8 user=0xffff80003c97e000, vmspace=0xfffffd806ba4cb90 estcpu=29, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 93354 256598 91474 0 2 0 syz-executor 93354 378885 91474 0 3 0x4000080 fsleep syz-executor 56343 291133 86187 0 2 0 syz-executor 56343 124486 86187 0 2 0x4000000 syz-executor 80697 372797 59949 0 2 0 syz-executor 80697 336719 59949 0 3 0x4000080 fsleep syz-executor 45705 225820 38918 0 2 0 syz-executor 45705 329019 38918 0 2 0x4000000 syz-executor 93364 337453 72913 0 2 0 syz-executor 93364 408679 72913 0 3 0x4000080 fsleep syz-executor 82451 189907 97138 -1 2 0x10 syz-executor 82451 114105 97138 -1 3 0x4000090 fsleep syz-executor 82451 250443 97138 -1 3 0x4000090 fsleep syz-executor 78450 133313 40865 0 2 0 syz-executor *78450 232983 40865 0 7 0x4000000 syz-executor 78450 24011 40865 0 3 0x4000080 fsleep syz-executor 78450 369656 40865 0 2 0x4000000 syz-executor 6146 302332 0 0 3 0x14200 bored sosplice 99533 115923 95111 0 3 0x82 nanoslp syz-executor 38918 366422 95111 0 3 0x82 nanoslp syz-executor 40865 325024 95111 0 3 0x82 nanoslp syz-executor 91474 519805 95111 0 3 0x82 nanoslp syz-executor 97138 487775 95111 0 3 0x82 nanoslp syz-executor 86187 404083 95111 0 3 0x82 nanoslp syz-executor 59949 266204 95111 0 3 0x82 nanoslp syz-executor 72913 65453 95111 0 3 0x82 nanoslp syz-executor 95111 235253 23968 0 3 0x82 kqread syz-executor 23968 73288 44599 0 3 0x10008a sigsusp ksh 44599 114368 64922 0 3 0x98 kqread sshd-session 64922 143282 4498 0 3 0x92 kqread sshd-session 95376 97438 1 0 3 0x100083 ttyin getty 4498 310424 1 0 3 0x88 kqread sshd 36561 94112 20560 73 3 0x1100090 kqread syslogd 20560 255567 1 0 3 0x100082 sbwait syslogd 23824 178772 1 0 3 0x100080 kqread resolvd 58390 486440 50448 77 3 0x100092 kqread dhcpleased 37759 336361 50448 77 3 0x100092 kqread dhcpleased 50448 457125 1 0 3 0x80 kqread dhcpleased 64166 395706 0 0 3 0x14200 bored smr 83458 518480 0 0 2 0x14200 zerothread 32041 300145 0 0 3 0x14200 aiodoned aiodoned 54600 155953 0 0 3 0x14200 syncer update 2810 79606 0 0 3 0x14200 cleaner cleaner 19545 469689 0 0 3 0x14200 reaper reaper 4842 160600 0 0 3 0x14200 pgdaemon pagedaemon 91982 486956 0 0 3 0x14200 bored viomb 51694 252454 0 0 3 0x40014200 acpi0 acpi0 30951 48116 0 0 3 0x14200 bored softnet7 83512 200310 0 0 3 0x14200 bored softnet6 28936 45620 0 0 3 0x14200 bored softnet5 5339 319524 0 0 3 0x14200 bored softnet4 52963 498466 0 0 3 0x14200 bored softnet3 61754 364294 0 0 3 0x14200 bored softnet2 8034 361812 0 0 3 0x14200 bored softnet1 57550 314989 0 0 3 0x14200 bored softnet0 5818 236228 0 0 3 0x14200 bored systqmp 56835 235058 0 0 3 0x14200 bored systq 40159 108362 0 0 3 0x40014200 tmoslp softclock 8316 300925 0 0 3 0x40014200 idle0 1 13924 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 10243 11177K 11451K 166960K 11945 0 pcb 17 16K 21K 166960K 277 0 rtable 224 9K 9K 166960K 391 0 pf 31 13K 16K 166960K 69 0 ifaddr 41 7K 8K 166960K 67 0 ifgroup 46 2K 2K 166960K 84 0 sysctl 2 1K 9K 166960K 8 0 counters 31 17K 18K 166960K 152 0 ioctlops 0 0K 4K 166960K 242 0 iov 0 0K 20K 166960K 132 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1349 85K 85K 166960K 1779 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 24 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 102K 166960K 673 0 sigio 0 0K 0K 166960K 13 0 proc 60 59K 124K 166960K 531 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 83 0 in_multi 91 6K 7K 166960K 125 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 4 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 2K 166960K 425 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 240 159K 168K 166960K 7532 0 UVM aobj 42 2K 2K 166960K 43 0 pinsyscall 39 78K 96K 166960K 1698 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 28 0 NDP 10 0K 2K 166960K 41 0 temp 59 8639K 8716K 166960K 21388 0 kqueue 14 22K 34K 166960K 143 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 78 0 74 1 0 1 1 0 8 0 rtentry 136 127 0 36 4 0 4 4 0 8 0 unpcb 144 487 0 469 7 3 4 4 0 8 3 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpcb 736 213 0 209 8 1 7 7 0 8 6 arp 88 14 0 2 1 0 1 1 0 8 0 ipq 40 3 0 1 1 0 1 1 0 8 0 ipqe 40 6 0 4 1 0 1 1 0 8 0 inpcb 328 637 0 629 15 8 7 9 0 8 6 ip6q 72 3 0 2 2 1 1 1 0 8 0 ip6af 40 5 0 4 2 1 1 1 0 8 0 nd6 104 25 0 6 1 0 1 1 0 8 0 pkpcb 40 7 0 7 3 2 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 118 0 118 3 2 1 1 0 8 1 pppxif 1384 2 0 2 2 1 1 1 0 8 1 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pfrktable 1344 3 0 1 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 2 1 0 1 1 0 8 0 pfstate 384 2 0 1 1 0 1 1 0 8 0 pfrule 1344 1 0 0 1 0 1 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 562 0 149 31 2 29 31 0 8 1 art_table 40 564 0 149 5 0 5 5 0 8 0 art_node 32 126 0 49 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 9 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 20 0 10 1 0 1 1 0 8 0 shmpl 112 40 0 1 2 0 2 2 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2563 0 1066 95 0 95 95 0 8 0 ffsino 256 2563 0 1066 95 0 95 95 0 8 0 nchpl 144 3547 0 1862 63 0 63 63 0 8 0 rtmask 32 6 0 6 2 1 1 1 0 8 1 uvmvnodes 80 2859 0 0 59 0 59 59 0 8 0 vnodes 216 2859 0 0 159 0 159 159 0 8 0 namei 1024 12120 0 12120 5 4 1 2 0 8 1 kstatmem 264 50 0 30 2 0 2 2 0 8 0 scsiplug 72 3 0 3 3 2 1 1 0 8 1 scxspl 216 11351 0 11351 8 7 1 8 1 8 1 plimitpl 152 243 0 227 1 0 1 1 0 8 0 sigapl 424 972 0 921 10 1 9 9 0 8 2 knotepl 120 58509 0 58457 50 41 9 30 0 8 7 kqueuepl 184 304 0 292 5 4 1 4 0 8 0 pipepl 304 267 0 239 3 0 3 3 0 8 0 fdescpl 448 929 0 899 5 1 4 5 0 8 0 filepl 120 5501 0 5276 14 5 9 11 0 8 0 lockfpl 104 334 0 332 2 1 1 2 0 8 0 lockfspl 48 88 0 86 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 35 0 19 1 0 1 1 0 8 0 ucredpl 104 1170 0 1155 1 0 1 1 0 8 0 zombiepl 144 1104 0 1103 3 2 1 1 0 8 0 processpl 1168 972 0 921 7 1 6 6 0 8 2 procpl 664 1886 0 1823 9 1 8 8 0 8 2 sosppl 168 7 0 7 4 3 1 1 0 8 1 sockpl 552 1261 0 1231 21 13 8 10 0 8 5 mcl64k 65536 43 0 43 4 3 1 1 0 8 1 mcl16k 16384 5 0 5 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 1 0 1 0 8 0 mcl9k 9216 2 0 2 2 1 1 1 0 8 1 mcl8k 8192 23 0 23 3 2 1 1 0 8 1 mcl4k 4096 3176 0 3125 16 9 7 15 0 8 0 mcl2k 2048 921 0 914 3 1 2 3 0 8 0 mtagpl 96 19 0 15 1 0 1 1 0 8 0 mbufpl 256 11304 0 11179 12 0 12 12 0 8 0 bufpl 280 3874 0 124 268 0 268 268 0 8 0 anonpl 24 161971 0 157967 61 11 50 50 0 187 18 amapchunkpl 152 24491 0 23936 33 8 25 25 0 158 2 amappl16 200 3383 0 3348 23 12 11 15 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 108 0 98 1 0 1 1 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 1563 0 1532 3 0 3 3 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 27 0 27 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 118 0 108 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 104 283 0 267 1 0 1 1 0 8 0 amappl3 96 4824 0 4705 4 0 4 4 0 8 0 amappl2 88 645 0 587 2 0 2 2 0 8 0 amappl1 80 10382 0 9829 14 1 13 14 0 8 0 amappl 88 6791 0 6615 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 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 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 42 0 1 1 0 1 1 0 8 0 uaddrrnd 24 929 0 899 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 929 0 899 1 0 1 1 0 8 0 vmmpekpl 168 9230 0 9202 2 0 2 2 0 8 0 vmmpepl 168 64766 0 62808 110 12 98 98 0 357 8 vmsppl 368 928 0 899 4 1 3 4 0 8 0 rwobjpl 40 22323 0 18541 41 0 41 41 0 8 0 pdppl 4096 1864 0 1798 106 40 66 82 0 8 0 pvpl 32 419634 0 410205 143 19 124 124 0 265 30 pmappl 216 928 0 899 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 405 0 69 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80003854aa88,ffff80003c983ee0,ffff80003c983e30) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003854aa88,ffff80003c983ee0,ffff80003c983e30) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c983ee0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c983ee0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x485f94100e0, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80003854aa88,ffff80003c983ee0,ffff80003c983e30) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003854aa88,ffff80003c983ee0,ffff80003c983e30) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c983ee0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c983ee0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x485f94100e0, count: -3