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(ffff80002a7d0538,ffff800035d87180,ffff800035d870d0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7d0538,ffff800035d87180,ffff800035d870d0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff800035d87180) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800035d87180) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x25805132b10, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff800035d870a0 rbx 0 rdx 0xffff800001440a80 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x87a2f1118be37a44 r11 0xcac2338aa4ffaa9e r12 0xfffffd806b5ded50 r13 0xdead4110dead4110 r14 0xffff800001490700 r15 0xa rip 0xffffffff81953df2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800035d87000 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=396126 pid=95797 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=83, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c9502c0,0xffff80003c953c68 process=0xffff80002d91cdb8 user=0xffff800035d82000, vmspace=0xfffffd806ba478b8 estcpu=33, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 21070 135554 79787 0 2 0 syz-executor 21070 11881 79787 0 3 0x4000080 fsleep syz-executor 72158 325934 73169 0 2 0 syz-executor 72158 207063 73169 0 3 0x4000080 fsleep syz-executor 72158 429183 73169 0 3 0x4000080 fsleep syz-executor 48252 45568 10696 0 2 0 syz-executor 48252 38091 10696 0 3 0x4000080 fsleep syz-executor 48252 309329 10696 0 3 0x4000080 fsleep syz-executor 48252 517172 10696 0 3 0x4000080 fsleep syz-executor 54778 435068 25918 0 2 0 syz-executor 54778 412479 25918 0 3 0x4000080 msgwait syz-executor 54778 342171 25918 0 3 0x4000080 msgwait syz-executor 54778 149294 25918 0 3 0x4000080 fsleep syz-executor 33226 485164 55702 0 2 0 syz-executor 33226 383389 55702 0 3 0x4000080 fsleep syz-executor 31138 84184 91664 0 2 0 syz-executor 31138 153848 91664 0 3 0x4000080 fsleep syz-executor 32156 470363 91318 0 2 0 syz-executor 32156 172038 91318 0 3 0x4000080 fsleep syz-executor 95797 302976 13560 0 2 0 syz-executor *95797 396126 13560 0 7 0x4000000 syz-executor 95797 337010 13560 0 3 0x4000080 fsleep syz-executor 95797 199174 13560 0 2 0x4000000 syz-executor 65431 120389 0 0 3 0x14280 nfsidl nfsio 66312 200915 0 0 3 0x14280 nfsidl nfsio 76972 41394 0 0 3 0x14280 nfsidl nfsio 26322 79125 0 0 3 0x14280 nfsidl nfsio 34922 438635 0 0 3 0x14280 nfsidl nfsio 57107 465587 0 0 3 0x14280 nfsidl nfsio 87265 400657 0 0 3 0x14280 nfsidl nfsio 44969 210107 0 0 3 0x14280 nfsidl nfsio 89389 290149 0 0 3 0x14280 nfsidl nfsio 83607 513166 0 0 3 0x14280 nfsidl nfsio 58840 182919 0 0 3 0x14280 nfsidl nfsio 28961 513009 0 0 3 0x14280 nfsidl nfsio 49053 299416 0 0 3 0x14280 nfsidl nfsio 4709 223389 0 0 3 0x14280 nfsidl nfsio 91513 52672 0 0 3 0x14280 nfsidl nfsio 74669 175639 0 0 3 0x14280 nfsidl nfsio 944 507341 0 0 3 0x14280 nfsidl nfsio 28060 24542 0 0 3 0x14280 nfsidl nfsio 6104 450587 0 0 3 0x14280 nfsidl nfsio 77590 113391 0 0 3 0x14280 nfsidl nfsio 45018 367753 84991 0 3 0x82 sbwait sshd-session 25353 203541 0 0 3 0x14200 bored sosplice 39889 153134 84991 0 3 0x82 sbwait sshd-session 91664 130774 33379 0 3 0x82 nanoslp syz-executor 79787 137738 33379 0 3 0x82 nanoslp syz-executor 55702 391351 33379 0 3 0x82 nanoslp syz-executor 10696 94473 33379 0 3 0x82 nanoslp syz-executor 25918 253214 33379 0 3 0x82 nanoslp syz-executor 73169 434548 33379 0 3 0x82 nanoslp syz-executor 91318 442234 33379 0 3 0x82 nanoslp syz-executor 13560 481310 33379 0 3 0x82 nanoslp syz-executor 33379 80274 737 0 3 0x82 kqread syz-executor 737 242834 48901 0 3 0x10008a sigsusp ksh 48901 352996 12308 0 3 0x98 kqread sshd-session 12308 308381 84991 0 3 0x92 kqread sshd-session 50462 258548 1 0 3 0x100083 ttyopn getty 84991 257408 1 0 3 0x88 kqread sshd 13347 6952 20365 73 3 0x1100090 kqread syslogd 20365 511852 1 0 3 0x100082 sbwait syslogd 33921 144334 1 0 3 0x100080 kqread resolvd 47187 445120 16366 77 3 0x100092 kqread dhcpleased 8578 371716 16366 77 3 0x100092 kqread dhcpleased 16366 374584 1 0 3 0x80 kqread dhcpleased 69338 190607 0 0 3 0x14200 bored smr 44510 106561 0 0 2 0x14200 zerothread 45222 78028 0 0 3 0x14200 aiodoned aiodoned 25873 193841 0 0 3 0x14200 syncer update 94573 113490 0 0 3 0x14200 cleaner cleaner 39726 863 0 0 3 0x14200 reaper reaper 33023 125262 0 0 3 0x14200 pgdaemon pagedaemon 58724 166839 0 0 3 0x14200 bored viomb 5326 410426 0 0 3 0x40014200 acpi0 acpi0 68469 280817 0 0 3 0x14200 bored softnet7 99131 119408 0 0 3 0x14200 bored softnet6 44175 317866 0 0 3 0x14200 bored softnet5 9712 387102 0 0 3 0x14200 bored softnet4 81532 218777 0 0 3 0x14200 bored softnet3 30337 347513 0 0 3 0x14200 bored softnet2 59490 257904 0 0 3 0x14200 bored softnet1 95155 359833 0 0 3 0x14200 bored softnet0 77656 275217 0 0 3 0x14200 bored systqmp 45617 326193 0 0 3 0x14200 bored systq 50004 4891 0 0 3 0x40014200 tmoslp softclock 96482 142346 0 0 3 0x40014200 idle0 1 382617 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 10202 11038K 11326K 166960K 12679 0 pcb 19 14K 16K 166960K 231 0 rtable 140 5K 6K 166960K 375 0 pf 27 12K 131084K 166960K 85 0 ifaddr 27 4K 8K 166960K 73 0 ifgroup 38 1K 2K 166960K 107 0 sysctl 4 1K 9K 166960K 12 0 counters 29 17K 17K 166960K 58 0 ioctlops 0 0K 4K 166960K 164 0 iov 0 0K 16K 166960K 102 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1403 88K 89K 166960K 2155 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 31 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 880 0 sigio 0 0K 0K 166960K 78 0 proc 61 67K 91K 166960K 582 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 72 0 in_multi 52 3K 7K 166960K 139 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 486 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 252 176K 185K 166960K 9530 0 UVM aobj 26 2K 3K 166960K 27 0 pinsyscall 43 86K 92K 166960K 1968 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 32 0 NDP 8 0K 2K 166960K 49 0 temp 58 8666K 8774K 166960K 34713 0 kqueue 15 24K 30K 166960K 166 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 120 124 0 121 2 0 2 2 0 8 1 rtentry 136 125 0 71 4 0 4 4 0 8 0 unpcb 144 526 0 505 4 0 4 4 0 8 3 syncache 336 11 0 11 2 1 1 1 0 8 1 tcpqe 32 3 0 3 2 1 1 1 0 8 1 tcpcb 736 202 0 189 2 0 2 2 0 8 0 arp 88 13 0 4 1 0 1 1 0 8 0 ipq 40 2 0 1 1 0 1 1 0 8 0 ipqe 40 3 0 2 1 0 1 1 0 8 0 inpcb 328 757 0 738 8 1 7 7 0 8 5 ip6q 72 4 0 0 1 0 1 1 0 8 0 ip6af 40 4 0 0 1 0 1 1 0 8 0 nd6 104 23 0 14 1 0 1 1 0 8 0 pkpcb 40 12 0 12 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1072 21 0 21 1 0 1 1 0 8 1 pppxif 1384 1 0 1 1 0 1 1 0 8 1 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 1 1 0 1 1 0 8 0 pfstate 384 2 0 0 1 0 1 1 0 8 0 pfrule 1344 2 0 2 2 1 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 602 0 371 30 3 27 29 0 8 8 art_table 40 606 0 371 5 0 5 5 0 8 0 art_node 32 124 0 77 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 13 2 1 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 25 0 15 1 0 1 1 0 8 0 shmpl 112 24 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2878 0 1382 95 0 95 95 0 8 0 ffsino 256 2878 0 1382 95 0 95 95 0 8 0 nchpl 144 4145 0 2463 63 0 63 63 0 8 0 uvmvnodes 80 3530 0 0 73 0 73 73 0 8 0 vnodes 216 3530 0 0 197 0 197 197 0 8 0 namei 1024 14385 0 14385 2 1 1 2 0 8 1 kstatmem 264 62 0 46 2 0 2 2 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 6 0 6 2 1 1 1 0 8 1 scxspl 216 14148 0 14148 9 7 2 8 1 8 2 plimitpl 152 217 0 199 1 0 1 1 0 8 0 sigapl 424 1191 0 1118 10 1 9 9 0 8 0 knotepl 120 34874 0 34572 29 17 12 16 0 8 2 kqueuepl 184 257 0 246 1 0 1 1 0 8 0 pipepl 304 294 0 267 13 5 8 8 0 8 5 fdescpl 448 1147 0 1115 5 1 4 5 0 8 0 filepl 120 7118 0 6829 18 6 12 14 0 8 3 lockfpl 104 586 0 581 2 0 2 2 0 8 1 lockfspl 48 242 0 237 1 0 1 1 0 8 0 sessionpl 144 30 0 20 1 0 1 1 0 8 0 pgrppl 48 50 0 32 1 0 1 1 0 8 0 ucredpl 104 1225 0 1214 1 0 1 1 0 8 0 zombiepl 144 1554 0 1554 2 1 1 1 0 8 1 processpl 1168 1191 0 1118 7 1 6 6 0 8 0 procpl 656 2455 0 2367 8 0 8 8 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 552 1441 0 1398 10 0 10 10 0 8 6 mcl64k 65536 42 0 42 2 1 1 1 0 8 1 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 9 0 9 2 1 1 1 0 8 1 mcl4k 4096 3449 0 3399 14 6 8 13 0 8 1 mcl2k 2048 1257 0 1247 3 0 3 3 0 8 1 mtagpl 96 27 0 18 1 0 1 1 0 8 0 mbufpl 256 13393 0 13256 43 20 23 43 0 8 8 bufpl 280 4746 0 132 330 0 330 330 0 8 0 anonpl 24 166805 0 163172 38 1 37 37 0 187 11 amapchunkpl 152 31304 0 30787 36 7 29 29 0 158 8 amappl16 200 2798 0 2761 7 2 5 5 0 8 2 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 120 0 108 1 0 1 1 0 8 0 amappl13 176 4 0 4 2 1 1 1 0 8 1 amappl12 168 1784 0 1752 2 0 2 2 0 8 0 amappl11 160 47 0 37 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 21 0 20 1 0 1 1 0 8 0 amappl7 128 177 0 165 1 0 1 1 0 8 0 amappl6 120 188 0 182 1 0 1 1 0 8 0 amappl5 112 121 0 114 1 0 1 1 0 8 0 amappl4 104 294 0 277 1 0 1 1 0 8 0 amappl3 96 6258 0 6141 4 0 4 4 0 8 0 amappl2 88 693 0 625 2 0 2 2 0 8 0 amappl1 80 12908 0 12173 17 0 17 17 0 8 0 amappl 88 8708 0 8532 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 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 0 1 1 0 8 1 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 255 0 255 2 1 1 1 0 8 1 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 26 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1147 0 1115 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1147 0 1115 1 0 1 1 0 8 0 vmmpekpl 168 11078 0 11047 2 0 2 2 0 8 0 vmmpepl 168 78145 0 75943 107 5 102 102 0 357 4 vmsppl 368 1146 0 1115 4 1 3 4 0 8 0 rwobjpl 40 26128 0 21498 47 0 47 47 0 8 0 pdppl 4096 2300 0 2230 108 38 70 80 0 8 0 pvpl 32 487608 0 477462 121 2 119 119 0 265 30 pmappl 216 1146 0 1115 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 429 0 77 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a7d0538,ffff800035d87180,ffff800035d870d0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7d0538,ffff800035d87180,ffff800035d870d0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff800035d87180) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800035d87180) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x25805132b10, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a7d0538,ffff800035d87180,ffff800035d870d0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7d0538,ffff800035d87180,ffff800035d870d0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff800035d87180) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800035d87180) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x25805132b10, count: -3