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(ffff80003ca3efc8,ffff80003c997a00,ffff80003c997950) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003ca3efc8,ffff80003c997a00,ffff80003c997950) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c997a00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c997a00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfb734f31e60, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c997930 rbx 0 rdx 0xffff800001464d00 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x9e6d9fec68695990 r11 0xa7ed0d8be1b26d77 r12 0xfffffd807e19de38 r13 0xdeafbeaddeafbead r14 0xffff80000148c700 r15 0xa rip 0xffffffff818ae1a2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c997890 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=309654 pid=17252 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=0xffff80003c9762c8,0xffff80003ca3f270 process=0xffff80003c986480 user=0xffff80003c992000, vmspace=0xfffffd806c154018 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 17258 157091 91087 0 2 0 syz-executor 17258 93056 91087 0 3 0x4000080 fsleep syz-executor 18019 44659 47152 0 2 0 syz-executor 18019 501691 47152 0 3 0x4000080 fsleep syz-executor 39796 278811 29853 0 2 0x1 syz-executor 39796 191596 29853 0 3 0x4000080 fsleep syz-executor 25288 250919 47153 0 2 0x1 syz-executor 25288 354229 47153 0 3 0x4000080 fsleep syz-executor 17252 161053 1193 0 2 0 syz-executor *17252 309654 1193 0 7 0x4000000 syz-executor 17252 481569 1193 0 2 0x4000001 syz-executor 17252 359530 1193 0 2 0x4000000 syz-executor 26891 278260 39090 0 3 0x80 nanoslp syz-executor 26891 324179 39090 0 3 0x4000080 ttyout syz-executor 26891 173946 39090 0 3 0x4000080 fsleep syz-executor 47152 435843 5484 0 3 0x82 nanoslp syz-executor 35666 231282 1 0 3 0x100083 ttyin getty 94040 42196 0 0 3 0x14200 acct acct 90302 333124 0 0 3 0x14200 bored sosplice 76198 84528 0 0 3 0x14280 nfsidl nfsio 73148 156566 0 0 3 0x14280 nfsidl nfsio 40586 472821 0 0 3 0x14280 nfsidl nfsio 43349 68728 0 0 3 0x14280 nfsidl nfsio 77015 444840 0 0 3 0x14280 nfsidl nfsio 91964 403221 0 0 3 0x14280 nfsidl nfsio 32111 26762 0 0 3 0x14280 nfsidl nfsio 27032 490240 0 0 3 0x14280 nfsidl nfsio 78576 222854 0 0 3 0x14280 nfsidl nfsio 75644 249106 0 0 3 0x14280 nfsidl nfsio 21857 138729 0 0 3 0x14280 nfsidl nfsio 79812 296143 0 0 3 0x14280 nfsidl nfsio 59371 277209 0 0 3 0x14280 nfsidl nfsio 25663 337262 0 0 3 0x14280 nfsidl nfsio 79219 490814 0 0 3 0x14280 nfsidl nfsio 30605 2017 0 0 3 0x14280 nfsidl nfsio 95209 62103 0 0 3 0x14280 nfsidl nfsio 19275 343002 0 0 3 0x14280 nfsidl nfsio 20461 447236 0 0 3 0x14280 nfsidl nfsio 34502 220862 0 0 3 0x14280 nfsidl nfsio 47153 319828 5484 0 3 0x82 nanoslp syz-executor 39090 188226 5484 0 3 0x82 nanoslp syz-executor 1193 448240 5484 0 3 0x82 nanoslp syz-executor 91087 412425 5484 0 3 0x82 nanoslp syz-executor 91969 261392 5484 0 3 0x82 wait syz-executor 91919 180012 5484 0 2 0x2 syz-executor 29853 436638 5484 0 3 0x82 nanoslp syz-executor 5484 164597 73402 0 3 0x82 kqread syz-executor 73402 238991 71788 0 3 0x10008a sigsusp ksh 71788 187311 29694 0 3 0x98 kqread sshd-session 29694 379015 76232 0 3 0x92 kqread sshd-session 76232 76959 1 0 3 0x88 kqread sshd 6599 245621 7842 73 3 0x1100090 kqread syslogd 7842 91877 1 0 3 0x100082 sbwait syslogd 14765 125910 1 0 3 0x100080 kqread resolvd 82164 381228 3539 77 3 0x100092 kqread dhcpleased 57788 516350 3539 77 3 0x100092 kqread dhcpleased 3539 476767 1 0 3 0x80 kqread dhcpleased 13432 25174 0 0 3 0x14200 bored smr 53717 462083 0 0 2 0x14200 zerothread 95496 192971 0 0 3 0x14200 aiodoned aiodoned 58768 56486 0 0 3 0x14200 syncer update 58172 68364 0 0 3 0x14200 cleaner cleaner 32825 363048 0 0 3 0x14200 reaper reaper 86059 74797 0 0 3 0x14200 pgdaemon pagedaemon 48709 193429 0 0 3 0x14200 bored viomb 33838 198494 0 0 3 0x40014200 acpi0 acpi0 52917 364082 0 0 3 0x14200 bored softnet7 2015 101253 0 0 3 0x14200 bored softnet6 94691 502990 0 0 3 0x14200 bored softnet5 83585 215111 0 0 3 0x14200 bored softnet4 63754 475722 0 0 3 0x14200 bored softnet3 45904 377493 0 0 3 0x14200 bored softnet2 2141 81549 0 0 3 0x14200 bored softnet1 4224 103131 0 0 3 0x14200 bored softnet0 56759 100183 0 0 3 0x14200 bored systqmp 2395 30742 0 0 3 0x14200 bored systq 74098 104523 0 0 3 0x40014200 tmoslp softclock 73221 122240 0 0 3 0x40014200 idle0 1 435271 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 10185 11040K 11366K 166960K 11725 0 pcb 18 16K 17K 166960K 171 0 rtable 189 8K 8K 166960K 457 0 pf 35 14K 18K 166960K 89 0 ifaddr 37 6K 8K 166960K 79 0 ifgroup 53 2K 2K 166960K 110 0 sysctl 4 1K 9K 166960K 10 0 counters 32 17K 18K 166960K 92 0 ioctlops 0 0K 4K 166960K 212 0 iov 0 0K 18K 166960K 39 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1367 86K 86K 166960K 1769 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 6K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 59 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 685 0 sigio 0 0K 0K 166960K 12 0 proc 60 59K 91K 166960K 572 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 53 0 in_multi 84 6K 7K 166960K 147 0 ether_multi 1 0K 0K 166960K 5 0 mrt 2 0K 0K 166960K 5 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 449 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 220 151K 173K 166960K 7652 0 UVM aobj 14 2K 2K 166960K 17 0 pinsyscall 38 76K 94K 166960K 1788 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 48 0 NDP 11 0K 2K 166960K 53 0 temp 60 8638K 8704K 166960K 23177 0 kqueue 14 22K 28K 166960K 114 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 96 0 93 1 0 1 1 0 8 0 rtentry 136 139 0 68 4 0 4 4 0 8 0 unpcb 144 490 0 474 8 5 3 6 0 8 2 syncache 336 8 0 8 2 1 1 1 0 8 1 tcpqe 32 4 0 4 2 1 1 1 0 8 1 tcpcb 736 207 0 199 8 6 2 7 0 8 0 arp 88 17 0 7 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 7 0 3 1 0 1 1 0 8 0 inpcb 328 969 0 955 17 9 8 11 0 8 6 ip6q 72 3 0 3 1 0 1 1 0 8 1 ip6af 40 6 0 6 1 0 1 1 0 8 1 nd6 104 25 0 10 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 1 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1072 55 0 55 2 1 1 1 0 8 1 pfstscr 40 69 0 69 1 1 0 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 128 138 0 136 1 0 1 1 0 8 0 pfstate 384 69 0 68 1 0 1 1 0 8 0 pfrule 1344 3 0 2 1 0 1 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 665 0 262 30 2 28 30 0 8 2 art_table 40 669 0 262 5 0 5 5 0 8 0 art_node 32 133 0 71 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 54 0 44 1 0 1 1 0 8 0 shmpl 112 14 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2532 0 1029 95 0 95 95 0 8 0 ffsino 256 2532 0 1029 95 0 95 95 0 8 0 nchpl 144 3479 0 1794 63 0 63 63 0 8 0 rtmask 32 4 0 4 1 1 0 1 0 8 0 uvmvnodes 80 2847 0 0 59 0 59 59 0 8 0 vnodes 216 2847 0 0 159 0 159 159 0 8 0 namei 1024 12211 0 12210 2 1 1 2 0 8 0 kstatmem 264 64 0 42 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 11838 0 11838 9 7 2 8 1 8 2 plimitpl 152 157 0 139 1 0 1 1 0 8 0 sigapl 424 992 0 921 9 0 9 9 0 8 0 knotepl 120 26148 0 26101 20 10 10 13 0 8 7 kqueuepl 184 248 0 237 5 2 3 3 0 8 2 pipepl 304 218 0 191 8 5 3 8 0 8 0 fdescpl 448 948 0 919 5 1 4 5 0 8 0 filepl 120 6221 0 5991 17 6 11 14 0 8 2 lockfpl 104 279 0 274 1 0 1 1 0 8 0 lockfspl 48 98 0 93 1 0 1 1 0 8 0 sessionpl 144 29 0 21 1 0 1 1 0 8 0 pgrppl 48 47 0 31 1 0 1 1 0 8 0 ucredpl 104 794 0 783 1 0 1 1 0 8 0 zombiepl 144 1073 0 1072 1 0 1 1 0 8 0 processpl 1168 992 0 921 6 0 6 6 0 8 0 procpl 664 1831 0 1751 8 0 8 8 0 8 0 sosppl 168 3 0 2 1 0 1 1 0 8 0 sockpl 552 1575 0 1542 24 16 8 20 0 8 4 mcl64k 65536 40 0 40 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 13 0 13 2 1 1 1 0 8 1 mcl4k 4096 3163 0 3115 13 5 8 12 0 8 1 mcl2k2 2112 2 0 2 1 1 0 1 0 8 0 mcl2k 2048 1043 0 1039 5 3 2 4 0 8 1 mtagpl 96 12 0 6 1 0 1 1 0 8 0 mbufpl 256 9615 0 9452 14 1 13 14 0 8 0 bufpl 280 4167 0 118 290 0 290 290 0 8 0 anonpl 24 172003 0 168853 64 19 45 46 0 187 18 amapchunkpl 152 25516 0 25049 31 4 27 27 0 158 5 amappl16 200 3111 0 3081 24 13 11 14 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 152 0 142 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1594 0 1565 3 1 2 3 0 8 0 amappl11 160 49 0 39 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 279 0 278 1 0 1 1 0 8 0 amappl8 136 59 0 58 1 0 1 1 0 8 0 amappl7 128 112 0 102 1 0 1 1 0 8 0 amappl6 120 193 0 189 1 0 1 1 0 8 0 amappl5 112 125 0 118 1 0 1 1 0 8 0 amappl4 104 283 0 269 1 0 1 1 0 8 0 amappl3 96 4809 0 4702 4 0 4 4 0 8 0 amappl2 88 721 0 665 2 0 2 2 0 8 0 amappl1 80 11432 0 10880 14 0 14 14 0 8 0 amappl 88 6863 0 6707 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 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 16 0 3 1 0 1 1 0 8 0 uaddrrnd 24 948 0 919 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 948 0 919 1 0 1 1 0 8 0 vmmpekpl 168 9546 0 9512 2 0 2 2 0 8 0 vmmpepl 168 66606 0 64753 98 8 90 92 0 357 2 vmsppl 368 947 0 919 4 1 3 4 0 8 0 rwobjpl 40 22939 0 19232 39 0 39 39 0 8 0 pdppl 4096 1902 0 1838 106 38 68 80 0 8 4 pvpl 32 444451 0 435831 147 34 113 119 0 265 28 pmappl 216 947 0 919 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 400 0 64 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80003ca3efc8,ffff80003c997a00,ffff80003c997950) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003ca3efc8,ffff80003c997a00,ffff80003c997950) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c997a00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c997a00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfb734f31e60, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80003ca3efc8,ffff80003c997a00,ffff80003c997950) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003ca3efc8,ffff80003c997a00,ffff80003c997950) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c997a00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c997a00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfb734f31e60, count: -3