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(ffff800033532a98,ffff80003355b5b0,ffff80003355b500) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff800033532a98,ffff80003355b5b0,ffff80003355b500) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003355b5b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003355b5b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75694c1ead0, count: -3 ddb> show registers rdi 0 rsi 0x200000000f08 rbp 0xffff80003355b4e0 rbx 0 rdx 0xffff800001428600 rcx 0 rax 0xf0 r8 0x7f7fffffc000 r9 0 r10 0xd8ad6c66f5f1203e r11 0xa8cb1b87a16138d3 r12 0xfffffd8064b56c58 r13 0xdead4110dead4110 r14 0xffff800001421900 r15 0x8 rip 0xffffffff812ac8c2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003355b440 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=234331 pid=74189 tcnt=5 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=84, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800033533790,0xffff800033532fd8 process=0xffff8000335356a0 user=0xffff800033556000, vmspace=0xfffffd8072c1b458 estcpu=34, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 49385 339711 80549 0 2 0x10 syz-executor 49385 307547 80549 0 3 0x4000090 fsleep syz-executor 49385 22850 80549 0 3 0x4000090 fsleep syz-executor 49385 4571 80549 0 3 0x4000090 fsleep syz-executor 23319 90274 35718 0 2 0 syz-executor 23319 514945 35718 0 3 0x4000080 fsleep syz-executor 23319 161761 35718 0 3 0x4000080 fsleep syz-executor 23319 195681 35718 0 2 0x4000000 syz-executor 83462 191542 20889 0 2 0 syz-executor 83462 290001 20889 0 3 0x4000080 fsleep syz-executor 83462 514353 20889 0 3 0x4000080 fsleep syz-executor 83462 30086 20889 0 2 0x4000000 syz-executor 74189 83631 56356 0 2 0 syz-executor 74189 128091 56356 0 3 0x4000080 fsleep syz-executor *74189 234331 56356 0 7 0x4000000 syz-executor 74189 467463 56356 0 2 0x4000000 syz-executor 74189 368593 56356 0 2 0x4000000 syz-executor 89392 464237 12414 0 2 0x2 syz-executor 35261 516501 12414 0 2 0x2 syz-executor 5667 272539 1 0 3 0x100083 ttyopn getty 92466 37032 0 0 3 0x14280 nfsidl nfsio 72799 504974 0 0 3 0x14280 nfsidl nfsio 52008 394187 0 0 3 0x14280 nfsidl nfsio 65638 495883 0 0 3 0x14280 nfsidl nfsio 83302 182496 0 0 3 0x14280 nfsidl nfsio 98652 153644 0 0 3 0x14280 nfsidl nfsio 4727 240553 0 0 3 0x14280 nfsidl nfsio 56301 445656 0 0 3 0x14280 nfsidl nfsio 56010 176386 0 0 3 0x14280 nfsidl nfsio 50831 230755 0 0 3 0x14280 nfsidl nfsio 1007 395545 0 0 3 0x14280 nfsidl nfsio 59382 422468 0 0 3 0x14280 nfsidl nfsio 33352 69613 0 0 3 0x14280 nfsidl nfsio 87324 351586 0 0 3 0x14280 nfsidl nfsio 9273 48677 0 0 3 0x14280 nfsidl nfsio 18996 108446 0 0 3 0x14280 nfsidl nfsio 77631 481073 0 0 3 0x14280 nfsidl nfsio 49659 89790 0 0 3 0x14280 nfsidl nfsio 96101 500554 0 0 3 0x14280 nfsidl nfsio 13787 262256 0 0 3 0x14280 nfsidl nfsio 20889 153869 12414 0 2 0x3 syz-executor 80549 248119 12414 0 3 0x82 nanoslp syz-executor 28012 357985 0 0 3 0x14200 bored sosplice 57220 253909 12414 0 2 0x2 syz-executor 49037 221876 12414 0 2 0x2 syz-executor 56356 9128 12414 0 2 0x3 syz-executor 35718 78986 12414 0 2 0x3 syz-executor 12414 116655 85467 0 3 0x82 kqread syz-executor 85467 64949 98213 0 3 0x10008a sigsusp ksh 98213 377929 95820 0 3 0x98 kqread sshd-session 95820 95981 29459 0 3 0x92 kqread sshd-session 29459 495302 1 0 3 0x88 kqread sshd 28589 327668 34403 73 3 0x1100090 kqread syslogd 34403 482312 1 0 3 0x100082 sbwait syslogd 78093 373345 1 0 3 0x100080 kqread resolvd 39991 117256 15320 77 3 0x100092 kqread dhcpleased 7050 95021 15320 77 3 0x100092 kqread dhcpleased 15320 227523 1 0 3 0x80 kqread dhcpleased 77229 454727 0 0 3 0x14200 bored smr 66759 144171 0 0 2 0x14200 zerothread 81490 45408 0 0 3 0x14200 aiodoned aiodoned 40278 408124 0 0 3 0x14200 syncer update 14556 63528 0 0 3 0x14200 cleaner cleaner 55022 402995 0 0 3 0x14200 reaper reaper 3519 483147 0 0 3 0x14200 pgdaemon pagedaemon 65750 278559 0 0 3 0x14200 bored viomb 92718 305686 0 0 3 0x40014200 acpi0 acpi0 99991 249967 0 0 3 0x14200 bored softnet0 39800 112508 0 0 3 0x14200 bored systqmp 10663 36077 0 0 3 0x14200 bored systq 14070 195610 0 0 3 0x40014200 tmoslp softclock 46998 370982 0 0 3 0x40014200 idle0 1 164938 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 10207 11063K 11441K 166960K 13561 0 pcb 17 16K 18K 166960K 485 0 rtable 214 9K 11K 166960K 732 0 pf 28 12K 17K 166960K 168 0 ifaddr 34 6K 8K 166960K 124 0 ifgroup 42 1K 2K 166960K 184 0 sysctl 4 1K 9K 166960K 20 0 counters 30 17K 18K 166960K 98 0 ioctlops 0 0K 4K 166960K 418 0 iov 0 0K 28K 166960K 209 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1460 92K 92K 166960K 2826 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 144 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 1403 0 sigio 0 0K 0K 166960K 26 0 proc 61 59K 124K 166960K 780 0 subproc 72 4K 4K 166960K 128 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 281 0 in_multi 77 5K 7K 166960K 216 0 ether_multi 1 0K 0K 166960K 24 0 mrt 0 0K 0K 166960K 47 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 271 1208K 1208K 166960K 271 0 exec 0 0K 1K 166960K 754 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 213 158K 182K 166960K 14080 0 UVM aobj 18 4K 6K 166960K 24 0 pinsyscall 38 76K 96K 166960K 2679 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 89 0 NDP 9 0K 2K 166960K 83 0 temp 77 8647K 8726K 166960K 73947 0 kqueue 13 20K 32K 166960K 260 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 120 333 0 330 5 2 3 3 0 8 2 rtentry 136 224 0 143 4 0 4 4 0 8 0 unpcb 144 1388 0 1373 14 10 4 11 0 8 3 syncache 336 11 0 11 2 1 1 1 0 8 1 tcpqe 32 5 0 5 2 1 1 1 0 8 1 tcpcb 736 612 0 602 13 6 7 7 0 8 6 arp 96 35 0 22 1 0 1 1 0 8 0 ipq 40 3 0 1 1 0 1 1 0 8 0 ipqe 40 35 0 33 1 0 1 1 0 8 0 inpcb 328 1699 0 1685 16 6 10 10 0 8 7 ip6q 72 7 0 4 1 0 1 1 0 8 0 ip6af 40 12 0 8 1 0 1 1 0 8 0 nd6 112 45 0 27 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 14 0 6 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1072 48 0 48 2 1 1 1 0 8 1 pppxif 1384 9 0 9 2 1 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfrktable 1344 7 0 7 2 1 1 1 0 8 1 pfanchor 1288 2 0 2 2 1 1 1 0 8 1 pftag 88 6 0 1 1 0 1 1 0 8 0 pfstkey 128 3 0 3 1 0 1 1 0 8 1 pfstate 384 2 0 2 1 0 1 1 0 8 1 pfrule 1344 9 0 9 2 1 1 1 0 8 1 rttmr 136 8 0 8 2 1 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1110 0 768 35 7 28 33 0 8 3 art_table 40 1114 0 768 6 0 6 6 0 8 0 art_node 32 221 0 150 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 17 1 0 1 1 0 8 0 semapl 112 141 0 131 1 0 1 1 0 8 0 shmpl 112 21 0 6 1 0 1 1 0 8 0 dirhash 1024 38 0 21 3 0 3 3 0 8 0 dino2pl 256 4028 0 2528 95 0 95 95 0 8 0 ffsino 256 4028 0 2528 95 0 95 95 0 8 0 nchpl 144 5878 0 4180 64 0 64 64 0 8 0 rtmask 32 7 0 7 2 1 1 1 0 8 1 vnodes 216 4970 0 0 277 0 277 277 0 8 0 namei 1024 22752 0 22751 3 2 1 2 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 110 0 92 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 6 0 6 2 1 1 1 0 8 1 scxspl 216 18113 0 18113 10 7 3 8 1 8 3 plimitpl 152 479 0 463 1 0 1 1 0 8 0 sigapl 424 1712 0 1649 8 0 8 8 0 8 0 knotepl 120 67105 0 67058 36 26 10 24 0 8 7 kqueuepl 184 743 0 733 9 3 6 6 0 8 5 pipepl 304 249 0 222 3 0 3 3 0 8 0 fdescpl 448 1676 0 1647 5 1 4 5 0 8 0 filepl 120 12660 0 12442 18 5 13 15 0 8 4 lockfpl 104 581 0 578 1 0 1 1 0 8 0 lockfspl 48 201 0 198 1 0 1 1 0 8 0 sessionpl 144 35 0 27 1 0 1 1 0 8 0 pgrppl 48 66 0 50 1 0 1 1 0 8 0 ucredpl 104 2090 0 2078 1 0 1 1 0 8 0 zombiepl 144 2123 0 2123 1 0 1 1 0 8 1 processpl 1152 1712 0 1649 5 0 5 5 0 8 0 procpl 664 3660 0 3584 8 0 8 8 0 8 0 sosppl 168 3 0 3 2 1 1 1 0 8 1 sockpl 552 3466 0 3434 29 19 10 21 0 8 6 mcl64k 65536 302 0 302 3 0 3 3 0 8 3 mcl16k 16384 17 0 17 2 1 1 1 0 8 1 mcl12k 12288 3 0 3 2 1 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 42 0 42 2 1 1 1 0 8 1 mcl4k 4096 4185 0 4134 13 5 8 13 0 8 1 mcl2k2 2112 3 0 3 2 1 1 1 0 8 1 mcl2k 2048 1923 0 1919 7 5 2 5 0 8 1 mtagpl 96 12 0 11 2 1 1 1 0 8 0 mbufpl 256 21334 0 21179 131 112 19 75 0 8 5 bufpl 280 5194 0 126 362 0 362 362 0 8 0 anonpl 24 239535 0 236570 70 26 44 51 0 187 15 amapchunkpl 152 54103 0 53690 51 16 35 35 0 158 14 amappl16 200 3867 0 3832 28 16 12 15 0 8 8 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 12 0 12 1 1 0 1 0 8 0 amappl13 176 483 0 482 1 0 1 1 0 8 0 amappl12 168 2075 0 2040 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 47 0 37 1 0 1 1 0 8 0 amappl9 144 257 0 256 2 1 1 1 0 8 0 amappl8 136 38 0 36 1 0 1 1 0 8 0 amappl7 128 112 0 110 1 0 1 1 0 8 0 amappl6 120 366 0 354 1 0 1 1 0 8 0 amappl5 112 82 0 74 1 0 1 1 0 8 0 amappl4 104 481 0 457 1 0 1 1 0 8 0 amappl3 96 8324 0 8247 3 0 3 3 0 8 0 amappl2 88 1828 0 1759 2 0 2 2 0 8 0 amappl1 80 16206 0 15690 13 0 13 13 0 8 0 amappl 88 13008 0 12864 5 0 5 5 0 92 0 uvmvnodes 80 4970 0 0 102 0 102 102 0 8 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 128 255 0 255 2 1 1 1 0 8 1 dma64 64 71 0 71 2 1 1 1 0 8 1 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 23 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1675 0 1647 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1675 0 1647 1 0 1 1 0 8 0 vmmpekpl 168 14649 0 14607 3 0 3 3 0 8 0 vmmpepl 168 111811 0 110148 102 11 91 91 0 357 9 vmsppl 368 1675 0 1647 4 1 3 4 0 8 0 rwobjpl 40 35398 0 29580 60 0 60 60 0 8 0 pdppl 4096 3356 0 3294 120 54 66 82 0 8 4 pvpl 32 702750 0 694941 145 33 112 118 0 265 24 pmappl 216 1675 0 1647 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 541 0 199 12 0 12 12 0 8 1 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff800033532a98,ffff80003355b5b0,ffff80003355b500) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff800033532a98,ffff80003355b5b0,ffff80003355b500) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003355b5b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003355b5b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75694c1ead0, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff800033532a98,ffff80003355b5b0,ffff80003355b500) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff800033532a98,ffff80003355b5b0,ffff80003355b500) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003355b5b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003355b5b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75694c1ead0, count: -3