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(ffff80002a7f0cf0,ffff80003c92f0e0,ffff80003c92f030) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f0cf0,ffff80003c92f0e0,ffff80003c92f030) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c92f0e0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c92f0e0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa764c93ec10, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c92f000 rbx 0 rdx 0xffff80000155a9c0 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x4d4d1864924acfda r11 0xf3b9060f7163df73 r12 0xfffffd806609fdc0 r13 0xdeaf4152deaf4152 r14 0xffff8000014e2900 r15 0xa rip 0xffffffff8144a292 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c92ef60 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=126016 pid=86163 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=80, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7f14a0,0xffff80002a7f02c0 process=0xffff8000361168e0 user=0xffff80003c92a000, vmspace=0xfffffd806c29c9e8 estcpu=30, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 7062 408909 91001 0 2 0 syz-executor 7062 239778 91001 0 2 0x4000000 syz-executor 33978 311049 85980 0 2 0 syz-executor 33978 312175 85980 0 3 0x4000080 fsleep syz-executor 92486 43374 26636 0 2 0 syz-executor 92486 441211 26636 0 3 0x4000080 fsleep syz-executor 92486 458641 26636 0 3 0x4000080 fsleep syz-executor 86163 271095 54919 0 2 0 syz-executor *86163 126016 54919 0 7 0x4000000 syz-executor 86163 468673 54919 0 3 0x4000080 fsleep syz-executor 86163 303226 54919 0 2 0x4000000 syz-executor 51199 304590 20556 0 2 0 syz-executor 51199 409542 20556 0 3 0x4000080 fsleep syz-executor 51199 490057 20556 0 3 0x4000080 fsleep syz-executor 51199 437615 20556 0 3 0x4000080 fsleep syz-executor 81159 357038 3918 0 2 0 syz-executor 81159 405146 3918 0 3 0x4000080 fsleep syz-executor 81159 376863 3918 0 3 0x4000080 fsleep syz-executor 81159 292418 3918 0 2 0x4000000 syz-executor 42935 114754 57016 0 2 0x2 syz-executor 86870 418315 0 0 3 0x14200 acct acct 54919 3334 57016 0 3 0x82 nanoslp syz-executor 53654 207523 0 0 3 0x14200 bored sosplice 14068 318721 19417 0 3 0x82 sbwait sshd-session 8389 328061 1 0 3 0x100083 ttyin getty 91001 121864 57016 0 3 0x82 nanoslp syz-executor 26636 12997 57016 0 3 0x82 nanoslp syz-executor 76426 223909 57016 0 2 0x2 syz-executor 20556 450224 57016 0 3 0x82 nanoslp syz-executor 3918 415576 57016 0 3 0x82 nanoslp syz-executor 85980 218844 57016 0 3 0x82 nanoslp syz-executor 57016 89518 89616 0 2 0x2 syz-executor 89616 172237 29599 0 3 0x10008a sigsusp ksh 29599 171398 55736 0 3 0x98 kqread sshd-session 55736 381626 19417 0 3 0x92 kqread sshd-session 19417 73015 1 0 3 0x88 kqread sshd 61480 394797 19279 73 3 0x1100090 kqread syslogd 19279 261548 1 0 3 0x100082 sbwait syslogd 56406 509151 1 0 3 0x100080 kqread resolvd 92243 269249 61985 77 3 0x100092 kqread dhcpleased 31816 237830 61985 77 3 0x100092 kqread dhcpleased 61985 219253 1 0 3 0x80 kqread dhcpleased 87215 450098 0 0 3 0x14200 bored smr 6128 22207 0 0 2 0x14200 zerothread 62608 18741 0 0 3 0x14200 aiodoned aiodoned 80131 93253 0 0 3 0x14200 syncer update 6163 13942 0 0 3 0x14200 cleaner cleaner 35074 49553 0 0 3 0x14200 reaper reaper 5973 58377 0 0 3 0x14200 pgdaemon pagedaemon 88837 403534 0 0 3 0x14200 bored viomb 690 178192 0 0 3 0x40014200 acpi0 acpi0 70209 179154 0 0 3 0x14200 bored softnet3 11165 518410 0 0 3 0x14200 bored softnet2 60655 122999 0 0 3 0x14200 bored softnet1 12337 440664 0 0 3 0x14200 bored softnet0 64058 296286 0 0 3 0x14200 bored systqmp 73019 330923 0 0 3 0x14200 bored systq 5147 98051 0 0 3 0x40014200 tmoslp softclock 44822 377710 0 0 3 0x40014200 idle0 1 180555 0 0 3 0x80082 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 10176 11119K 11741K 166960K 13730 0 pcb 17 13K 13K 166960K 239 0 rtable 167 8K 10K 166960K 582 0 pf 28 12K 20K 166960K 187 0 ifaddr 32 6K 8K 166960K 125 0 ifgroup 42 1K 2K 166960K 245 0 sysctl 4 1K 9K 166960K 77 0 counters 30 17K 18K 166960K 113 0 ioctlops 0 0K 4K 166960K 268 0 iov 0 0K 24K 166960K 204 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1462 92K 92K 166960K 3155 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 116 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 232K 166960K 1558 0 sigio 0 0K 0K 166960K 18 0 proc 60 59K 124K 166960K 993 0 subproc 66 4K 4K 166960K 267 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 127 0 in_multi 71 4K 7K 166960K 163 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 11 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 623 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 234 159K 184K 166960K 15094 0 UVM aobj 30 4K 4K 166960K 36 0 pinsyscall 39 78K 96K 166960K 2800 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 92 0 NDP 9 0K 2K 166960K 89 0 temp 66 8685K 8764K 166960K 48664 0 kqueue 14 22K 32K 166960K 234 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 120 176 0 173 2 1 1 2 0 8 0 rtentry 136 157 0 89 4 0 4 4 0 8 0 unpcb 144 931 0 914 8 6 2 6 0 8 1 syncache 336 7 0 7 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 652 0 646 19 12 7 7 0 8 6 arp 88 24 0 12 1 0 1 1 0 8 0 ipq 40 8 0 8 1 0 1 1 0 8 1 ipqe 40 9 0 9 1 0 1 1 0 8 1 inpcb 328 1412 0 1403 17 10 7 7 0 8 5 ip6q 72 3 0 1 1 0 1 1 0 8 0 ip6af 40 3 0 1 1 0 1 1 0 8 0 nd6 104 38 0 20 1 0 1 1 0 8 0 pkpcb 40 7 0 7 2 1 1 1 0 8 1 kcovpl 48 29 0 22 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1072 47 0 47 4 3 1 1 0 8 1 pppxif 1384 9 0 9 3 2 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pfrktable 1344 4 0 4 2 2 0 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfqueue 320 2 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 2 1 0 1 1 0 8 0 pfstate 384 2 0 1 1 0 1 1 0 8 0 pfrule 1344 6 0 4 1 0 1 1 0 8 0 rttmr 136 3 0 3 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 715 0 399 32 3 29 30 0 8 1 art_table 32 717 0 399 4 0 4 4 0 8 0 art_node 16 155 0 95 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 6 1 0 1 1 0 8 0 semapl 112 110 0 100 1 0 1 1 0 8 0 shmpl 112 33 0 6 1 0 1 1 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 4246 0 2726 96 0 96 96 0 8 0 ffsino 248 4246 0 2726 96 0 96 96 0 8 0 nchpl 144 6286 0 4583 64 0 64 64 0 8 0 rtmask 32 11 0 11 3 2 1 1 0 8 1 uvmvnodes 80 5375 0 0 110 0 110 110 0 8 0 vnodes 216 5375 0 0 299 0 299 299 0 8 0 namei 1024 22770 0 22768 4 3 1 2 0 8 0 kstatmem 264 138 0 120 3 1 2 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 9 0 9 3 2 1 1 0 8 1 scxspl 216 18511 0 18511 12 9 3 8 1 8 3 plimitpl 152 509 0 492 1 0 1 1 0 8 0 sigapl 424 1810 0 1763 9 1 8 8 0 8 2 knotepl 120 54523 0 54471 33 23 10 16 0 8 8 kqueuepl 184 404 0 393 1 0 1 1 0 8 0 pipepl 296 256 0 229 3 0 3 3 0 8 0 fdescpl 440 1769 0 1740 5 1 4 5 0 8 0 filepl 120 11340 0 11130 15 6 9 11 0 8 1 lockfpl 104 452 0 449 1 0 1 1 0 8 0 lockfspl 48 160 0 157 1 0 1 1 0 8 0 sessionpl 144 46 0 37 1 0 1 1 0 8 0 pgrppl 48 156 0 139 1 0 1 1 0 8 0 ucredpl 104 2482 0 2470 1 0 1 1 0 8 0 zombiepl 144 2114 0 2114 2 1 1 1 0 8 1 processpl 1160 1810 0 1763 5 0 5 5 0 8 1 procpl 656 3847 0 3787 8 0 8 8 0 8 2 sosppl 168 5 0 5 4 3 1 1 0 8 1 sockpl 528 2946 0 2917 20 13 7 11 0 8 4 mcl64k 65536 43 0 43 4 3 1 1 0 8 1 mcl16k 16384 14 0 14 2 1 1 1 0 8 1 mcl12k 12288 7 0 7 3 2 1 1 0 8 1 mcl9k 9216 9 0 9 3 2 1 1 0 8 1 mcl8k 8192 23 0 23 3 2 1 1 0 8 1 mcl4k 4096 4332 0 4274 15 6 9 13 0 8 1 mcl2k2 2112 2 0 2 1 0 1 1 0 8 1 mcl2k 2048 1606 0 1602 3 0 3 3 0 8 1 mtagpl 96 69 0 24 2 0 2 2 0 8 0 mbufpl 256 17516 0 17357 17 0 17 17 0 8 2 bufpl 280 5019 0 126 350 0 350 350 0 8 0 anonpl 24 235504 0 232055 86 52 34 59 0 187 7 amapchunkpl 152 49246 0 48761 56 23 33 36 0 158 14 amappl16 200 4452 0 4418 35 28 7 16 0 8 4 amappl15 192 22 0 22 1 1 0 1 0 8 0 amappl14 184 115 0 104 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 2524 0 2495 3 1 2 3 0 8 0 amappl11 160 53 0 42 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 414 0 414 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 113 0 101 1 0 1 1 0 8 0 amappl6 120 269 0 264 1 0 1 1 0 8 0 amappl5 112 181 0 173 1 0 1 1 0 8 0 amappl4 104 310 0 293 1 0 1 1 0 8 0 amappl3 96 9955 0 9847 4 0 4 4 0 8 0 amappl2 88 752 0 687 2 0 2 2 0 8 0 amappl1 80 14630 0 14005 15 0 15 15 0 8 0 amappl 88 14066 0 13901 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 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 128 257 0 257 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 35 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1769 0 1740 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1769 0 1740 1 0 1 1 0 8 0 vmmpekpl 168 15165 0 15123 3 0 3 3 0 8 0 vmmpepl 168 115082 0 113116 110 16 94 101 0 357 2 vmsppl 360 1768 0 1740 4 1 3 4 0 8 0 rwobjpl 32 35065 0 28698 52 0 52 52 0 8 0 pdppl 4096 3545 0 3480 131 60 71 83 0 8 6 pvpl 32 721129 0 711863 172 77 95 140 0 265 6 pmappl 216 1768 0 1740 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 337 0 94 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a7f0cf0,ffff80003c92f0e0,ffff80003c92f030) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f0cf0,ffff80003c92f0e0,ffff80003c92f030) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c92f0e0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c92f0e0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa764c93ec10, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a7f0cf0,ffff80003c92f0e0,ffff80003c92f030) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f0cf0,ffff80003c92f0e0,ffff80003c92f030) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c92f0e0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c92f0e0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa764c93ec10, count: -3