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(ffff80003991d4b8,ffff80003ad23070,ffff80003ad22fc0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003991d4b8,ffff80003ad23070,ffff80003ad22fc0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003ad23070) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003ad23070) at syscall+0x97e sys/arch/amd64/amd64/trap.c:732 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa876c7cf910, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003ad22f90 rbx 0 rdx 0xffff80000146b0c0 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x9b1d300574d9bb01 r11 0xf878096b130d07e1 r12 0xfffffd8065a6ee10 r13 0xdead4110dead4110 r14 0xffff8000014abf00 r15 0xa rip 0xffffffff817e0ca2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003ad22ef0 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=292419 pid=68886 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=36, usrpri=80, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7f0f80,0xffff80003991cfa8 process=0xffff800037515b48 user=0xffff80003ad1e000, vmspace=0xfffffd806c23fe20 estcpu=30, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 57237 514610 58633 0 2 0 syz-executor 57237 466381 58633 0 2 0x4000000 syz-executor 42704 339444 93944 0 2 0 syz-executor 42704 214494 93944 0 3 0x4000080 fsleep syz-executor 99324 455356 97004 0 2 0 syz-executor 99324 220150 97004 0 3 0x4000080 fsleep syz-executor 99324 200277 97004 0 2 0x4000000 syz-executor 68886 146546 5376 60928 2 0x10 syz-executor *68886 292419 5376 60928 7 0x4000010 syz-executor 68886 461457 5376 60928 3 0x4000090 fsleep syz-executor 68886 152564 5376 60928 2 0x4000010 syz-executor 70558 375819 0 0 3 0x14200 acct acct 95011 447526 1 0 3 0x100083 ttyin getty 11062 334483 0 0 3 0x14280 nfsidl nfsio 94588 203912 0 0 3 0x14280 nfsidl nfsio 94579 79180 0 0 3 0x14280 nfsidl nfsio 40352 334215 0 0 3 0x14280 nfsidl nfsio 16807 228719 0 0 3 0x14280 nfsidl nfsio 15130 235034 0 0 3 0x14280 nfsidl nfsio 23836 203020 0 0 3 0x14280 nfsidl nfsio 302 34271 0 0 3 0x14280 nfsidl nfsio 82003 79490 0 0 3 0x14280 nfsidl nfsio 55757 39953 0 0 3 0x14280 nfsidl nfsio 51626 518207 0 0 3 0x14280 nfsidl nfsio 16580 387398 0 0 3 0x14280 nfsidl nfsio 81124 487256 0 0 3 0x14280 nfsidl nfsio 36728 246716 0 0 3 0x14280 nfsidl nfsio 28217 145377 0 0 3 0x14280 nfsidl nfsio 58224 479161 0 0 3 0x14280 nfsidl nfsio 50197 496731 0 0 3 0x14280 nfsidl nfsio 31949 516098 0 0 3 0x14280 nfsidl nfsio 48374 355016 0 0 3 0x14280 nfsidl nfsio 18055 217002 0 0 3 0x14280 nfsidl nfsio 56080 305558 28551 0 2 0x2 syz-executor 70929 400356 0 0 3 0x14200 bored sosplice 5376 69160 28551 0 3 0x82 nanoslp syz-executor 93944 86554 28551 0 3 0x82 nanoslp syz-executor 41625 301289 28551 0 2 0x2 syz-executor 58633 237699 28551 0 3 0x82 nanoslp syz-executor 97004 375818 28551 0 3 0x82 nanoslp syz-executor 36157 430637 28551 0 3 0x82 wait syz-executor 52390 464863 28551 0 3 0x82 wait syz-executor 28551 445185 22556 0 3 0x82 kqread syz-executor 22556 349100 12153 0 3 0x10008a sigsusp ksh 12153 285135 20189 0 3 0x98 kqread sshd-session 20189 410559 26927 0 3 0x92 kqread sshd-session 26927 424897 1 0 3 0x88 kqread sshd 30651 289683 20678 73 3 0x1100090 kqread syslogd 20678 503136 1 0 3 0x100082 sbwait syslogd 24513 332812 1 0 3 0x100080 kqread resolvd 37446 483645 75694 77 3 0x100092 kqread dhcpleased 64345 474527 75694 77 3 0x100092 kqread dhcpleased 75694 454478 1 0 3 0x80 kqread dhcpleased 78538 115095 0 0 3 0x14200 bored smr 61312 32047 0 0 2 0x14200 zerothread 78898 8125 0 0 3 0x14200 aiodoned aiodoned 16037 177485 0 0 2 0x14200 update 75761 369094 0 0 3 0x14200 cleaner cleaner 3379 331968 0 0 3 0x14200 reaper reaper 51220 451095 0 0 3 0x14200 pgdaemon pagedaemon 11102 78409 0 0 3 0x14200 bored viomb 22677 373922 0 0 3 0x40014200 acpi0 acpi0 63763 226322 0 0 3 0x14200 bored softnet3 89918 364294 0 0 3 0x14200 bored softnet2 66537 387073 0 0 3 0x14200 bored softnet1 10904 419734 0 0 3 0x14200 bored softnet0 29638 274185 0 0 3 0x14200 bored systqmp 54132 91716 0 0 3 0x14200 bored systq 5225 504872 0 0 2 0x40014200 softclock 44766 48272 0 0 3 0x40014200 idle0 1 318016 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10175 11038K 11369K 166960K 11763 0 pcb 19 17K 22K 166960K 311 0 rtable 193 8K 8K 166960K 622 0 pf 36 14K 18K 166960K 88 0 ifaddr 35 6K 7K 166960K 63 0 ifgroup 46 2K 2K 166960K 86 0 sysctl 4 1K 9K 166960K 8 0 counters 31 17K 18K 166960K 47 0 ioctlops 0 0K 4K 166960K 309 0 iov 0 0K 16K 166960K 49 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1365 86K 86K 166960K 1809 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 21 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 52 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 97K 166960K 722 0 sigio 0 0K 0K 166960K 9 0 proc 60 59K 124K 166960K 560 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 59 0 in_multi 78 5K 7K 166960K 119 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 416 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 216 143K 157K 166960K 7865 0 UVM aobj 25 4K 4K 166960K 29 0 pinsyscall 37 74K 96K 166960K 1774 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 24 0 NDP 10 0K 2K 166960K 41 0 temp 64 8684K 8752K 166960K 29468 0 kqueue 15 24K 28K 166960K 141 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 120 138 0 134 3 0 3 3 0 8 1 rtentry 136 133 0 51 4 0 4 4 0 8 0 unpcb 144 529 0 514 7 5 2 6 0 8 1 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 257 0 250 7 6 1 7 0 8 0 arp 88 20 0 6 1 0 1 1 0 8 0 ipq 40 6 0 2 1 0 1 1 0 8 0 ipqe 40 10 0 5 1 0 1 1 0 8 0 inpcb 328 882 0 868 15 10 5 12 0 8 3 ip6q 72 33 0 32 1 0 1 1 0 8 0 ip6af 40 65 0 64 1 0 1 1 0 8 0 nd6 104 32 0 11 1 0 1 1 0 8 0 pkpcb 40 5 0 5 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 10 0 10 1 1 0 1 0 8 0 pppxif 1384 1 0 1 1 1 0 1 0 8 0 pfstscr 40 4 0 4 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 pfrktable 1344 70 0 68 1 0 1 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 6 0 2 1 0 1 1 0 8 0 pfstkey 128 13 0 9 1 0 1 1 0 8 0 pfstate 384 8 0 6 1 0 1 1 0 8 0 pfrule 1344 76 0 74 1 0 1 1 0 8 0 rttmr 136 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 256 575 0 238 29 4 25 29 0 8 0 art_table 32 577 0 238 4 0 4 4 0 8 0 art_node 16 130 0 56 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 9 1 0 1 1 0 8 0 semapl 112 49 0 39 1 0 1 1 0 8 0 shmpl 112 26 0 4 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 2700 0 1202 95 0 95 95 0 8 0 ffsino 248 2700 0 1202 95 0 95 95 0 8 0 nchpl 144 3741 0 2055 63 0 63 63 0 8 0 uvmvnodes 80 2968 0 0 61 0 61 61 0 8 0 vnodes 216 2968 0 0 165 0 165 165 0 8 0 namei 1024 12804 0 12804 3 2 1 2 0 8 1 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 46 0 26 2 0 2 2 0 8 0 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 11390 0 11331 9 1 8 8 1 8 3 plimitpl 152 107 0 91 1 0 1 1 0 8 0 sigapl 424 1020 0 954 8 0 8 8 0 8 0 knotepl 120 25421 0 25372 18 7 11 17 0 8 8 kqueuepl 184 210 0 199 1 0 1 1 0 8 0 pipepl 296 214 0 187 5 2 3 5 0 8 0 fdescpl 440 982 0 954 5 1 4 5 0 8 0 filepl 120 6155 0 5932 16 5 11 13 0 8 2 lockfpl 104 212 0 210 1 0 1 1 0 8 0 lockfspl 48 93 0 91 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 39 0 23 1 0 1 1 0 8 0 ucredpl 104 931 0 917 1 0 1 1 0 8 0 zombiepl 144 997 0 995 1 0 1 1 0 8 0 processpl 1160 1020 0 954 5 0 5 5 0 8 0 procpl 656 1900 0 1827 8 0 8 8 0 8 0 sosppl 168 8 0 8 1 0 1 1 0 8 1 sockpl 528 1577 0 1544 21 9 12 12 0 8 8 mcl64k 65536 113 0 113 2 1 1 1 0 8 1 mcl8k 8192 11 0 11 1 1 0 1 0 8 0 mcl4k 4096 3184 0 3133 14 7 7 14 0 8 0 mcl2k 2048 809 0 804 4 2 2 3 0 8 1 mtagpl 96 8 0 5 1 0 1 1 0 8 0 mbufpl 256 12785 0 12655 19 7 12 19 0 8 0 bufpl 280 3607 0 119 250 0 250 250 0 8 0 anonpl 24 154848 0 151738 64 30 34 57 0 187 7 amapchunkpl 152 25900 0 25450 34 8 26 28 0 158 7 amappl16 200 2579 0 2549 19 14 5 15 0 8 0 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 124 0 113 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 1639 0 1611 2 0 2 2 0 8 0 amappl11 160 69 0 59 1 0 1 1 0 8 0 amappl10 152 25 0 25 1 1 0 1 0 8 0 amappl9 144 247 0 246 1 0 1 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 114 0 104 1 0 1 1 0 8 0 amappl6 120 201 0 198 1 0 1 1 0 8 0 amappl5 112 119 0 112 1 0 1 1 0 8 0 amappl4 104 299 0 285 1 0 1 1 0 8 0 amappl3 96 4964 0 4862 4 1 3 4 0 8 0 amappl2 88 626 0 571 2 0 2 2 0 8 0 amappl1 80 10311 0 9766 14 2 12 14 0 8 0 amappl 88 7096 0 6943 5 1 4 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 1 1 0 1 0 8 0 dma128 128 255 0 255 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 28 0 4 1 0 1 1 0 8 0 uaddrrnd 24 982 0 954 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 982 0 954 1 0 1 1 0 8 0 vmmpekpl 168 9332 0 9293 3 0 3 3 0 8 0 vmmpepl 168 65799 0 63997 94 10 84 94 0 357 0 vmsppl 360 981 0 954 4 1 3 4 0 8 0 rwobjpl 32 21316 0 17486 32 0 32 32 0 8 0 pdppl 4096 1971 0 1908 101 34 67 83 0 8 4 pvpl 32 427381 0 419090 145 54 91 136 0 265 8 pmappl 216 981 0 954 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 285 0 68 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80003991d4b8,ffff80003ad23070,ffff80003ad22fc0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003991d4b8,ffff80003ad23070,ffff80003ad22fc0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003ad23070) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003ad23070) at syscall+0x97e sys/arch/amd64/amd64/trap.c:732 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa876c7cf910, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80003991d4b8,ffff80003ad23070,ffff80003ad22fc0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003991d4b8,ffff80003ad23070,ffff80003ad22fc0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003ad23070) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003ad23070) at syscall+0x97e sys/arch/amd64/amd64/trap.c:732 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa876c7cf910, count: -3