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(ffff80003c990d30,ffff80003c977760,ffff80003c9776b0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003c990d30,ffff80003c977760,ffff80003c9776b0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c977760) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c977760) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4147d9e9b60, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c977690 rbx 0 rdx 0xffff800001464340 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0xef94a12b121ad89a r11 0xb966f282d733e3fa r12 0xfffffd806a986ed8 r13 0xdead4110dead4110 r14 0xffff800001598000 r15 0xa rip 0xffffffff81377bf2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c9775f0 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=335021 pid=84610 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=0xffff80003c9902d0,0xffff80003c9a2a98 process=0xffff80003ca16918 user=0xffff80003c972000, vmspace=0xfffffd806b9b08b8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 39336 389183 63528 60929 2 0x10 syz-executor 39336 76134 63528 60929 3 0x4000090 fsleep syz-executor 40670 427763 54081 0 2 0 syz-executor 40670 153998 54081 0 2 0x4000000 syz-executor 90603 179011 95961 0 2 0 syz-executor 90603 109642 95961 0 3 0x4000080 fsleep syz-executor 90603 167663 95961 0 2 0x4000000 syz-executor 54789 494374 21673 0 2 0 syz-executor 54789 458062 21673 0 3 0x4000080 fsleep syz-executor 54789 158405 21673 0 3 0x4000080 fsleep syz-executor 84610 195530 12646 0 2 0 syz-executor *84610 335021 12646 0 7 0x4000000 syz-executor 84610 451858 12646 0 3 0x4000080 fsleep syz-executor 84610 233308 12646 0 2 0x4000000 syz-executor 61455 149835 23470 0 2 0x82000 syz-executor 61455 32672 23470 0 4 0x4082000 syz-executor 61455 384073 23470 0 3 0x4002000 suspend syz-executor 875 250750 1 0 3 0x100083 ttyin getty 24566 374341 0 0 3 0x14280 nfsidl nfsio 34276 383216 0 0 3 0x14280 nfsidl nfsio 28369 524027 0 0 3 0x14280 nfsidl nfsio 62786 67824 0 0 3 0x14280 nfsidl nfsio 74455 162653 0 0 3 0x14280 nfsidl nfsio 77158 9422 0 0 3 0x14280 nfsidl nfsio 44600 322308 0 0 3 0x14280 nfsidl nfsio 24276 306494 0 0 3 0x14280 nfsidl nfsio 1810 301286 0 0 3 0x14280 nfsidl nfsio 5026 55492 0 0 3 0x14280 nfsidl nfsio 95907 405641 0 0 3 0x14280 nfsidl nfsio 44660 473022 0 0 3 0x14280 nfsidl nfsio 58946 229004 0 0 3 0x14280 nfsidl nfsio 81104 91474 0 0 3 0x14280 nfsidl nfsio 18693 303202 0 0 3 0x14280 nfsidl nfsio 30632 197413 0 0 3 0x14280 nfsidl nfsio 65546 68313 0 0 3 0x14280 nfsidl nfsio 62826 126126 0 0 3 0x14280 nfsidl nfsio 20366 11305 0 0 3 0x14280 nfsidl nfsio 96782 186187 0 0 3 0x14280 nfsidl nfsio 97937 457831 0 0 3 0x14200 bored sosplice 21673 269519 75389 0 2 0xc82 syz-executor 54081 5959 75389 0 3 0x82 nanoslp syz-executor 63528 12346 75389 0 3 0x82 nanoslp syz-executor 46109 510314 75389 0 2 0x2 syz-executor 12646 442881 75389 0 3 0x82 nanoslp syz-executor 23470 23020 75389 0 3 0x82 nanoslp syz-executor 95961 344563 75389 0 3 0x82 nanoslp syz-executor 28609 441409 75389 0 3 0x82 nanoslp syz-executor 75389 351797 68214 0 3 0x82 kqread syz-executor 68214 195222 12428 0 3 0x10008a sigsusp ksh 12428 281955 88111 0 3 0x98 kqread sshd-session 88111 313937 16429 0 3 0x92 kqread sshd-session 16429 371921 1 0 3 0x88 kqread sshd 7717 449944 46809 73 3 0x1100090 kqread syslogd 46809 32109 1 0 3 0x100082 sbwait syslogd 77411 265705 1 0 3 0x100080 kqread resolvd 67777 88229 94235 77 3 0x100092 kqread dhcpleased 41371 231107 94235 77 3 0x100092 kqread dhcpleased 94235 270475 1 0 3 0x80 kqread dhcpleased 65704 317753 0 0 3 0x14200 bored smr 63987 523167 0 0 2 0x14200 zerothread 59237 466662 0 0 3 0x14200 aiodoned aiodoned 50234 53212 0 0 3 0x14200 syncer update 61674 205968 0 0 3 0x14200 cleaner cleaner 43928 288613 0 0 3 0x14200 reaper reaper 88496 146895 0 0 3 0x14200 pgdaemon pagedaemon 76780 97864 0 0 3 0x14200 bored viomb 76698 356410 0 0 3 0x40014200 acpi0 acpi0 94476 33111 0 0 3 0x14200 bored softnet7 44282 21730 0 0 3 0x14200 bored softnet6 50846 309820 0 0 3 0x14200 bored softnet5 78272 10297 0 0 3 0x14200 bored softnet4 98602 306766 0 0 3 0x14200 bored softnet3 18656 66055 0 0 3 0x14200 bored softnet2 78607 441474 0 0 3 0x14200 bored softnet1 30415 242318 0 0 3 0x14200 bored softnet0 13026 124960 0 0 3 0x14200 bored systqmp 87534 504287 0 0 3 0x14200 bored systq 71634 38444 0 0 2 0x40014200 softclock 95739 410805 0 0 3 0x40014200 idle0 1 382029 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 11049K 15294K 166960K 13052 0 pcb 17 14K 15K 166960K 196 0 rtable 175 9K 9K 166960K 411 0 pf 35 14K 20K 166960K 101 0 ifaddr 34 6K 7K 166960K 79 0 ifgroup 46 2K 2K 166960K 108 0 sysctl 3 1K 9K 166960K 15 0 counters 31 17K 18K 166960K 69 0 ioctlops 0 0K 4K 166960K 224 0 iov 0 0K 17K 166960K 38 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1562 98K 98K 166960K 2386 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 31 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 102K 166960K 870 0 sigio 0 0K 0K 166960K 10 0 proc 60 59K 91K 166960K 540 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 75 0 in_multi 66 4K 7K 166960K 132 0 ether_multi 1 0K 0K 166960K 7 0 mrt 2 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 579 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 232 151K 167K 166960K 9450 0 UVM aobj 11 6K 6K 166960K 13 0 pinsyscall 38 76K 92K 166960K 1899 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 102 0 NDP 10 0K 2K 166960K 50 0 temp 65 8640K 8895K 166960K 44771 0 kqueue 13 20K 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 120 134 0 131 2 0 2 2 0 8 1 rtentry 136 131 0 69 4 0 4 4 0 8 0 unpcb 144 763 0 746 10 1 9 10 0 8 8 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 279 0 272 3 1 2 2 0 8 1 arp 88 15 0 6 1 0 1 1 0 8 0 ipq 40 3 0 2 1 0 1 1 0 8 0 ipqe 40 4 0 3 1 0 1 1 0 8 0 inpcb 328 870 0 860 8 1 7 7 0 8 5 ip6q 72 4 0 1 1 0 1 1 0 8 0 ip6af 40 8 0 3 1 0 1 1 0 8 0 nd6 104 25 0 12 1 0 1 1 0 8 0 pkpcb 40 7 0 7 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 32 0 32 1 0 1 1 0 8 1 pppxif 1384 2 0 2 1 0 1 1 0 8 1 pfstscr 40 3 0 3 2 1 1 1 0 8 1 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 9 0 7 2 1 1 1 0 8 0 pfstate 384 5 0 4 2 1 1 1 0 8 0 rttmr 136 3 0 3 2 1 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 629 0 323 29 3 26 28 0 8 3 art_table 40 633 0 323 5 0 5 5 0 8 0 art_node 32 129 0 75 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 7 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 28 0 18 1 0 1 1 0 8 0 shmpl 112 10 0 2 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3181 0 1688 95 0 95 95 0 8 0 ffsino 256 3181 0 1688 95 0 95 95 0 8 0 nchpl 144 4416 0 2733 63 0 63 63 0 8 0 rtmask 32 9 0 9 2 1 1 1 0 8 1 uvmvnodes 80 3803 0 0 78 0 78 78 0 8 0 vnodes 216 3803 0 0 212 0 212 212 0 8 0 namei 1024 15011 0 15010 3 2 1 2 0 8 0 kstatmem 264 68 0 48 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 18557 0 18557 15 7 8 8 1 8 8 plimitpl 152 218 0 200 1 0 1 1 0 8 0 sigapl 424 1171 0 1101 10 1 9 9 0 8 0 knotepl 120 63522 0 63475 33 23 10 17 0 8 8 kqueuepl 184 568 0 559 10 1 9 10 0 8 8 pipepl 304 197 0 170 5 0 5 5 0 8 2 fdescpl 448 1127 0 1098 5 1 4 5 0 8 0 filepl 120 7859 0 7609 17 1 16 16 0 8 8 lockfpl 104 646 0 644 2 0 2 2 0 8 1 lockfspl 48 214 0 212 1 0 1 1 0 8 0 sessionpl 144 24 0 16 1 0 1 1 0 8 0 pgrppl 48 40 0 24 1 0 1 1 0 8 0 ucredpl 104 1519 0 1507 1 0 1 1 0 8 0 zombiepl 144 1506 0 1505 2 1 1 1 0 8 0 processpl 1168 1171 0 1101 7 1 6 6 0 8 0 procpl 664 2455 0 2374 8 0 8 8 0 8 0 sosppl 168 3 0 3 1 0 1 1 0 8 1 sockpl 552 1803 0 1773 22 11 11 21 0 8 8 mcl64k 65536 127 0 127 2 1 1 1 0 8 1 mcl16k 16384 3 0 3 1 0 1 1 0 8 1 mcl12k 12288 4 0 4 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 28 0 28 2 1 1 1 0 8 1 mcl4k 4096 3473 0 3418 14 6 8 14 0 8 0 mcl2k 2048 1257 0 1247 4 1 3 3 0 8 1 mtagpl 96 9 0 9 1 0 1 1 0 8 1 mbufpl 256 11925 0 11782 22 5 17 17 0 8 4 bufpl 280 7780 0 1552 446 0 446 446 0 8 0 anonpl 24 181519 0 177830 48 0 48 48 0 187 16 amapchunkpl 152 32147 0 31619 49 13 36 36 0 158 14 amappl16 200 3102 0 3067 23 12 11 15 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 106 0 96 1 0 1 1 0 8 0 amappl13 176 5 0 4 1 0 1 1 0 8 0 amappl12 168 1735 0 1706 3 1 2 3 0 8 0 amappl11 160 43 0 33 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 256 0 256 1 1 0 1 0 8 0 amappl8 136 19 0 17 1 0 1 1 0 8 0 amappl7 128 98 0 88 1 0 1 1 0 8 0 amappl6 120 166 0 163 1 0 1 1 0 8 0 amappl5 112 113 0 106 1 0 1 1 0 8 0 amappl4 104 271 0 255 1 0 1 1 0 8 0 amappl3 96 6234 0 6120 5 1 4 4 0 8 0 amappl2 88 625 0 570 2 0 2 2 0 8 0 amappl1 80 11586 0 11034 15 1 14 14 0 8 1 amappl 88 8673 0 8503 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 128 255 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 12 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1127 0 1098 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1127 0 1098 1 0 1 1 0 8 0 vmmpekpl 168 10653 0 10624 2 0 2 2 0 8 0 vmmpepl 168 75473 0 73595 94 0 94 94 0 357 7 vmsppl 368 1126 0 1098 4 1 3 4 0 8 0 rwobjpl 40 25266 0 20579 48 0 48 48 0 8 0 pdppl 4096 2260 0 2196 96 30 66 78 0 8 2 pvpl 32 501669 0 492579 124 6 118 118 0 265 31 pmappl 216 1126 0 1098 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 394 0 56 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80003c990d30,ffff80003c977760,ffff80003c9776b0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003c990d30,ffff80003c977760,ffff80003c9776b0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c977760) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c977760) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4147d9e9b60, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80003c990d30,ffff80003c977760,ffff80003c9776b0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003c990d30,ffff80003c977760,ffff80003c9776b0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c977760) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c977760) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4147d9e9b60, count: -3