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(ffff80002a7f0540,ffff80003ca03220,ffff80003ca03170) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f0540,ffff80003ca03220,ffff80003ca03170) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003ca03220) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003ca03220) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3138f8e4890, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003ca03140 rbx 0 rdx 0xffff80000142f540 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x14381cf19e28dad0 r11 0x2b4aa1ec70463ee8 r12 0xfffffd8068cfbc30 r13 0xdeaf4152deaf4152 r14 0xffff80000148be00 r15 0xa rip 0xffffffff82dec7c2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003ca030a0 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=73229 pid=34828 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=73, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7767b8,0xffff80002ccf7230 process=0xffff800036517b00 user=0xffff80003c9fe000, vmspace=0xfffffd806c192018 estcpu=23, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 61218 142868 66686 0 2 0 syz-executor 61218 130297 66686 0 2 0x4000000 syz-executor 24009 489667 1292 0 2 0 syz-executor 24009 307445 1292 0 3 0x4000080 fsleep syz-executor 34828 105070 47910 0 2 0 syz-executor *34828 73229 47910 0 7 0x4000000 syz-executor 34828 418033 47910 0 3 0x4000080 fsleep syz-executor 34828 104046 47910 0 2 0x4000000 syz-executor 24505 449486 55608 0 2 0 syz-executor 24505 451819 55608 0 2 0x4000000 syz-executor 13775 188752 51247 0 2 0 syz-executor 13775 14862 51247 0 3 0x4000080 fsleep syz-executor 55608 354054 62193 0 2 0x3 syz-executor 56789 502020 0 0 3 0x14200 acct acct 15035 469021 1 0 3 0x80 nanoslp init 94522 10906 0 0 3 0x14280 nfsidl nfsio 97456 166991 0 0 3 0x14280 nfsidl nfsio 95172 8905 0 0 3 0x14280 nfsidl nfsio 9708 295788 0 0 3 0x14280 nfsidl nfsio 69480 360872 0 0 3 0x14280 nfsidl nfsio 4285 370161 0 0 3 0x14280 nfsidl nfsio 62989 80720 0 0 3 0x14280 nfsidl nfsio 53417 22084 0 0 3 0x14280 nfsidl nfsio 32786 426704 0 0 3 0x14280 nfsidl nfsio 84119 486385 0 0 3 0x14280 nfsidl nfsio 33509 149780 0 0 3 0x14280 nfsidl nfsio 6857 111526 0 0 3 0x14280 nfsidl nfsio 2967 420884 0 0 3 0x14280 nfsidl nfsio 88999 412474 0 0 3 0x14280 nfsidl nfsio 28579 240319 0 0 3 0x14280 nfsidl nfsio 19374 346908 0 0 3 0x14280 nfsidl nfsio 78029 380144 0 0 3 0x14280 nfsidl nfsio 46205 463088 0 0 3 0x14280 nfsidl nfsio 63434 201603 0 0 3 0x14280 nfsidl nfsio 46733 306310 0 0 3 0x14280 nfsidl nfsio 90763 235109 0 0 3 0x14200 bored sosplice 51247 22767 62193 0 2 0x3 syz-executor 66686 382512 62193 0 2 0x3 syz-executor 19294 430658 62193 0 2 0x2 syz-executor 1292 372266 62193 0 3 0x82 nanoslp syz-executor 5031 153762 62193 0 2 0x3 syz-executor 59479 128126 62193 0 3 0x82 wait syz-executor 47910 93994 62193 0 2 0x3 syz-executor 62193 247301 41415 0 3 0x82 kqread syz-executor 41415 171278 92574 0 3 0x10008a sigsusp ksh 92574 459897 35468 0 3 0x98 kqread sshd-session 35468 162710 21484 0 3 0x92 kqread sshd-session 21484 168274 1 0 3 0x88 kqread sshd 88369 44110 4270 73 3 0x1100090 kqread syslogd 4270 335618 1 0 3 0x100082 sbwait syslogd 54506 42860 1 0 3 0x100080 kqread resolvd 18414 144038 39333 77 3 0x100092 kqread dhcpleased 60874 362500 39333 77 3 0x100092 kqread dhcpleased 39333 419233 1 0 3 0x80 kqread dhcpleased 28222 343400 0 0 3 0x14200 bored smr 78902 78982 0 0 2 0x14200 zerothread 82628 515398 0 0 3 0x14200 aiodoned aiodoned 87252 109888 0 0 3 0x14200 syncer update 1089 430694 0 0 3 0x14200 cleaner cleaner 30287 515859 0 0 3 0x14200 reaper reaper 45492 130604 0 0 3 0x14200 pgdaemon pagedaemon 66888 11642 0 0 3 0x14200 bored viomb 80452 314676 0 0 3 0x40014200 acpi0 acpi0 29581 28915 0 0 3 0x14200 bored softnet3 96786 256037 0 0 3 0x14200 bored softnet2 74828 162696 0 0 3 0x14200 bored softnet1 16663 477972 0 0 3 0x14200 bored softnet0 761 514925 0 0 3 0x14200 bored systqmp 62238 81015 0 0 3 0x14200 bored systq 24418 430580 0 0 3 0x40014200 tmoslp softclock 46545 173627 0 0 3 0x40014200 idle0 1 150679 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 10187 11305K 15624K 166960K 12051 0 pcb 18 12K 12K 166960K 79 0 rtable 160 7K 8K 166960K 429 0 pf 29 13K 14K 166960K 69 0 ifaddr 31 5K 7K 166960K 65 0 ifgroup 42 1K 2K 166960K 94 0 sysctl 4 1K 9K 166960K 11 0 counters 30 17K 18K 166960K 55 0 ioctlops 0 0K 4K 166960K 147 0 iov 0 0K 16K 166960K 78 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1421 89K 90K 166960K 1874 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 88 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 232K 166960K 533 0 sigio 0 0K 0K 166960K 3 0 proc 51 50K 91K 166960K 547 0 subproc 72 4K 4K 166960K 82 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 120 0 in_multi 69 5K 7K 166960K 134 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 1 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 392 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 139K 153K 166960K 6181 0 UVM aobj 14 2K 2K 166960K 18 0 pinsyscall 37 74K 91K 166960K 1583 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 20 0 NDP 9 0K 2K 166960K 42 0 temp 63 8684K 8749K 166960K 14994 0 kqueue 13 20K 30K 166960K 100 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 67 0 63 1 0 1 1 0 8 0 rtentry 136 131 0 64 4 0 4 4 0 8 0 unpcb 144 290 0 275 4 3 1 4 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 183 0 179 10 3 7 7 0 8 6 arp 88 22 0 10 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 648 0 639 12 5 7 7 0 8 6 ip6q 72 3 0 1 1 0 1 1 0 8 0 ip6af 40 4 0 2 1 0 1 1 0 8 0 nd6 104 28 0 11 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 16 0 16 3 2 1 1 0 8 1 pppxif 1384 2 0 2 2 2 0 1 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfrule 1344 1 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 547 0 232 29 7 22 29 0 8 1 art_table 32 548 0 232 4 0 4 4 0 8 0 art_node 16 129 0 69 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 7 1 0 1 1 0 8 0 semapl 112 86 0 76 1 0 1 1 0 8 0 shmpl 112 15 0 4 1 0 1 1 0 8 0 dirhash 1024 22 0 5 3 0 3 3 0 8 0 dino2pl 256 2311 0 818 95 0 95 95 0 8 0 ffsino 248 2311 0 818 95 0 95 95 0 8 0 nchpl 144 3012 0 1329 63 0 63 63 0 8 0 rtmask 32 6 0 6 2 2 0 1 0 8 0 uvmvnodes 80 2716 0 0 56 0 56 56 0 8 0 vnodes 216 2716 0 0 151 0 151 151 0 8 0 namei 1024 10265 0 10264 4 3 1 2 0 8 0 kstatmem 264 48 0 30 2 0 2 2 0 8 0 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 9268 0 9268 9 8 1 8 1 8 1 plimitpl 152 133 0 117 1 0 1 1 0 8 0 sigapl 424 822 0 755 8 0 8 8 0 8 0 knotepl 120 17519 0 17472 18 16 2 10 0 8 0 kqueuepl 184 203 0 193 4 3 1 4 0 8 0 pipepl 296 133 0 106 3 0 3 3 0 8 0 fdescpl 440 784 0 755 5 1 4 5 0 8 0 filepl 120 5049 0 4827 17 4 13 13 0 8 6 lockfpl 104 150 0 143 1 0 1 1 0 8 0 lockfspl 48 64 0 59 1 0 1 1 0 8 0 sessionpl 144 23 0 16 1 0 1 1 0 8 0 pgrppl 48 36 0 21 1 0 1 1 0 8 0 ucredpl 104 665 0 653 1 0 1 1 0 8 0 zombiepl 144 806 0 803 2 1 1 1 0 8 0 processpl 1160 822 0 755 5 0 5 5 0 8 0 procpl 656 1385 0 1309 7 0 7 7 0 8 0 sosppl 168 3 0 3 2 2 0 1 0 8 0 sockpl 528 1015 0 985 12 5 7 8 0 8 4 mcl64k 65536 13 0 13 3 2 1 1 0 8 1 mcl9k 9216 3 0 3 1 1 0 1 0 8 0 mcl8k 8192 7 0 7 2 1 1 1 0 8 1 mcl4k 4096 2917 0 2863 17 9 8 16 0 8 0 mcl2k 2048 599 0 586 4 2 2 3 0 8 0 mtagpl 96 290 0 280 8 4 4 7 0 8 0 mbufpl 256 8761 0 8566 29 12 17 29 0 8 1 bufpl 280 2980 0 130 204 0 204 204 0 8 0 anonpl 24 137522 0 134460 62 30 32 45 0 187 8 amapchunkpl 152 19547 0 19076 34 10 24 28 0 158 5 amappl16 200 2442 0 2409 15 12 3 14 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 106 0 97 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1407 0 1379 2 0 2 2 0 8 0 amappl11 160 60 0 50 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 298 0 297 1 0 1 1 0 8 0 amappl8 136 20 0 19 1 0 1 1 0 8 0 amappl7 128 102 0 93 1 0 1 1 0 8 0 amappl6 120 183 0 179 1 0 1 1 0 8 0 amappl5 112 122 0 114 1 0 1 1 0 8 0 amappl4 104 289 0 275 1 0 1 1 0 8 0 amappl3 96 3657 0 3551 3 0 3 3 0 8 0 amappl2 88 642 0 585 2 0 2 2 0 8 0 amappl1 80 9503 0 8987 13 1 12 13 0 8 0 amappl 88 5459 0 5300 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 8 0 8 2 2 0 1 0 8 0 dma128 128 256 0 256 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 17 0 4 1 0 1 1 0 8 0 uaddrrnd 24 784 0 755 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 784 0 755 1 0 1 1 0 8 0 vmmpekpl 168 7480 0 7441 2 0 2 2 0 8 0 vmmpepl 168 54288 0 52476 95 12 83 93 0 357 0 vmsppl 360 783 0 755 4 1 3 4 0 8 0 rwobjpl 32 19047 0 15511 29 0 29 29 0 8 0 pdppl 4096 1575 0 1510 95 28 67 79 0 8 2 pvpl 32 353847 0 345603 147 61 86 116 0 265 5 pmappl 216 783 0 755 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 297 0 71 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a7f0540,ffff80003ca03220,ffff80003ca03170) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f0540,ffff80003ca03220,ffff80003ca03170) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003ca03220) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003ca03220) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3138f8e4890, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a7f0540,ffff80003ca03220,ffff80003ca03170) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f0540,ffff80003ca03220,ffff80003ca03170) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003ca03220) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003ca03220) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3138f8e4890, count: -3