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(ffff80002a7c3c48,ffff80003c93bd10,ffff80003c93bc60) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7c3c48,ffff80003c93bd10,ffff80003c93bc60) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c93bd10) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c93bd10) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78b02aca6e0, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c93bc30 rbx 0 rdx 0 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x56e84d1c8e6cac40 r11 0x2157f1e86d91816a r12 0xfffffd806ad56eb0 r13 0xdead4110dead4110 r14 0xffff800001594a00 r15 0xa rip 0xffffffff821137e2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c93bb90 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=517699 pid=12500 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=81, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7c22a8,0xffff80002a7f1220 process=0xffff800037116d68 user=0xffff80003c936000, vmspace=0xfffffd806c29b448 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 79568 129320 85320 0 2 0 syz-executor 79568 318850 85320 0 3 0x4000080 fsleep syz-executor 65719 14405 88256 0 2 0 syz-executor 65719 210879 88256 0 3 0x4000080 fsleep syz-executor 65719 76169 88256 0 3 0x4000080 fsleep syz-executor 67612 400030 22511 0 2 0 syz-executor 67612 355396 22511 0 3 0x4000000 smrbar syz-executor 83181 137796 56375 0 2 0 syz-executor 83181 96922 56375 0 3 0x4000080 fsleep syz-executor 12500 419394 34596 0 2 0 syz-executor *12500 517699 34596 0 7 0x4000000 syz-executor 12500 398594 34596 0 3 0x4000080 fsleep syz-executor 12500 37996 34596 0 2 0x4000000 syz-executor 12598 382565 42517 0 2 0 syz-executor 12598 73604 42517 0 3 0x4000080 kqpoll syz-executor 12598 499693 42517 0 2 0x4000000 syz-executor 12598 410333 42517 0 2 0x4000000 syz-executor 45692 251629 8170 0 3 0x80 nanoslp syz-executor 45692 521236 8170 0 3 0x4000080 fsleep syz-executor 45692 277746 8170 0 3 0x4000080 fifor syz-executor 80520 356023 0 0 3 0x14280 nfsidl nfsio 46025 9540 0 0 3 0x14280 nfsidl nfsio 28418 376282 0 0 3 0x14280 nfsidl nfsio 11956 26040 0 0 3 0x14280 nfsidl nfsio 6929 180787 0 0 3 0x14280 nfsidl nfsio 81429 275267 0 0 3 0x14280 nfsidl nfsio 4402 167304 0 0 3 0x14280 nfsidl nfsio 50282 63806 0 0 3 0x14280 nfsidl nfsio 21807 466312 0 0 3 0x14280 nfsidl nfsio 68210 38426 0 0 3 0x14280 nfsidl nfsio 72630 61473 0 0 3 0x14280 nfsidl nfsio 58919 239644 0 0 3 0x14280 nfsidl nfsio 24812 27512 0 0 3 0x14280 nfsidl nfsio 96262 338486 0 0 3 0x14280 nfsidl nfsio 91438 230827 0 0 3 0x14280 nfsidl nfsio 95102 521758 0 0 3 0x14280 nfsidl nfsio 99095 167022 0 0 3 0x14280 nfsidl nfsio 29304 147629 0 0 3 0x14280 nfsidl nfsio 80653 448440 0 0 3 0x14280 nfsidl nfsio 64828 295668 0 0 3 0x14280 nfsidl nfsio 96738 251663 0 0 3 0x14200 bored sosplice 72720 103159 0 0 3 0x14200 acct acct 22511 315936 26127 0 3 0x82 nanoslp syz-executor 34596 173799 26127 0 3 0x82 nanoslp syz-executor 42517 87772 26127 0 3 0x82 nanoslp syz-executor 8170 384757 26127 0 3 0x82 nanoslp syz-executor 55270 515834 26127 0 3 0x82 nanoslp syz-executor 56375 149074 26127 0 3 0x82 nanoslp syz-executor 88256 323544 26127 0 3 0x82 nanoslp syz-executor 85320 81022 26127 0 3 0x82 nanoslp syz-executor 26127 290245 17274 0 3 0x82 kqread syz-executor 17274 148120 46972 0 3 0x10008a sigsusp ksh 46972 124706 45513 0 3 0x98 kqread sshd-session 45513 263521 43835 0 3 0x92 kqread sshd-session 97971 88958 1 0 3 0x100083 ttyopn getty 43835 105873 1 0 3 0x88 kqread sshd 94947 7726 38013 73 3 0x1100090 kqread syslogd 38013 77350 1 0 3 0x100082 sbwait syslogd 97973 419770 1 0 3 0x100080 kqread resolvd 98737 391927 65923 77 3 0x100092 kqread dhcpleased 73970 143246 65923 77 3 0x100092 kqread dhcpleased 65923 330730 1 0 3 0x80 kqread dhcpleased 63839 369060 0 0 3 0x14200 bored smr 59105 441495 0 0 2 0x14200 zerothread 16678 237412 0 0 3 0x14200 aiodoned aiodoned 44343 421323 0 0 3 0x14200 syncer update 79430 50640 0 0 3 0x14200 cleaner cleaner 51207 276143 0 0 3 0x14200 reaper reaper 80635 89987 0 0 3 0x14200 pgdaemon pagedaemon 75863 319586 0 0 3 0x14200 bored viomb 92760 177148 0 0 3 0x40014200 acpi0 acpi0 11252 519014 0 0 3 0x14200 bored softnet3 53608 73970 0 0 3 0x14200 bored softnet2 3837 320502 0 0 3 0x14200 bored softnet1 9043 101738 0 0 3 0x14200 bored softnet0 8409 443188 0 0 3 0x14200 bored systqmp 13771 109303 0 0 3 0x14200 bored systq 89146 233257 0 0 3 0x40014200 tmoslp softclock 16929 362095 0 0 3 0x40014200 idle0 1 465437 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 10213 11130K 11634K 166960K 12384 0 pcb 18 14K 16K 166960K 191 0 rtable 250 9K 9K 166960K 439 0 pf 34 13K 15K 166960K 74 0 ifaddr 44 7K 8K 166960K 71 0 ifgroup 55 2K 2K 166960K 108 0 sysctl 1 1K 9K 166960K 6 0 counters 33 17K 18K 166960K 60 0 ioctlops 0 0K 4K 166960K 248 0 iov 0 0K 16K 166960K 29 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1438 90K 91K 166960K 2027 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 7K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 29 3K 3K 166960K 129 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 662 0 sigio 0 0K 0K 166960K 8 0 proc 60 59K 116K 166960K 535 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 106 0 in_multi 99 7K 7K 166960K 129 0 ether_multi 1 0K 0K 166960K 11 0 mrt 2 0K 0K 166960K 7 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 496 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 241 151K 166K 166960K 7469 0 UVM aobj 79 3K 4K 166960K 82 0 pinsyscall 39 78K 96K 166960K 1678 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 43 0 NDP 12 0K 1K 166960K 45 0 temp 57 8683K 8802K 166960K 29563 0 kqueue 14 22K 26K 166960K 114 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 120 199 0 196 5 2 3 3 0 8 2 rtentry 136 135 0 22 5 0 5 5 0 8 0 unpcb 144 600 0 583 10 4 6 6 0 8 5 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 162 0 157 4 0 4 4 0 8 3 arp 88 22 0 3 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 0 1 0 1 1 0 8 0 inpcb 328 726 0 715 12 5 7 7 0 8 6 nd6 104 30 0 3 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1072 20 0 20 2 1 1 1 0 8 1 pppxif 1384 5 0 5 2 1 1 1 0 8 1 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 597 0 141 33 2 31 32 0 8 1 art_table 32 599 0 141 5 1 4 5 0 8 0 art_node 16 133 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 121 0 94 1 0 1 1 0 8 0 shmpl 112 79 0 3 3 0 3 3 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2526 0 1023 95 0 95 95 0 8 0 ffsino 248 2526 0 1023 95 0 95 95 0 8 0 nchpl 144 3420 0 1733 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 uvmvnodes 80 3074 0 0 63 0 63 63 0 8 0 vnodes 216 3074 0 0 171 0 171 171 0 8 0 namei 1024 11911 0 11911 2 1 1 2 0 8 1 kstatmem 264 58 0 34 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 11094 0 11094 9 7 2 8 1 8 2 plimitpl 152 377 0 361 1 0 1 1 0 8 0 sigapl 424 950 0 882 9 1 8 8 0 8 0 knotepl 120 61021 0 60972 15 6 9 9 0 8 7 kqueuepl 184 306 0 296 7 3 4 4 0 8 3 pipepl 296 170 0 143 5 2 3 5 0 8 0 fdescpl 440 912 0 882 5 1 4 5 0 8 0 filepl 120 5990 0 5772 15 3 12 12 0 8 5 lockfpl 104 148 0 146 1 0 1 1 0 8 0 lockfspl 48 63 0 61 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 36 0 20 1 0 1 1 0 8 0 ucredpl 104 775 0 764 1 0 1 1 0 8 0 zombiepl 144 1098 0 1097 1 0 1 1 0 8 0 processpl 1160 950 0 882 5 0 5 5 0 8 0 procpl 656 1824 0 1743 8 0 8 8 0 8 1 sosppl 168 4 0 4 2 1 1 1 0 8 1 sockpl 528 1543 0 1512 18 8 10 12 0 8 7 mcl64k 65536 6 0 6 2 1 1 1 0 8 1 mcl9k 9216 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 9 0 9 2 1 1 1 0 8 1 mcl4k 4096 3125 0 3069 14 6 8 14 0 8 0 mcl2k 2048 860 0 792 11 1 10 10 0 8 1 mtagpl 96 92 0 8 3 0 3 3 0 8 0 mbufpl 256 10271 0 9994 35 16 19 29 0 8 0 bufpl 280 3468 0 125 239 0 239 239 0 8 0 anonpl 24 138479 0 133646 72 19 53 53 0 187 19 amapchunkpl 152 23958 0 23376 35 4 31 31 0 158 8 amappl16 200 2339 0 2283 26 14 12 15 0 8 8 amappl15 192 9 0 9 2 1 1 1 0 8 1 amappl14 184 107 0 97 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 1525 0 1494 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 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 38 0 36 1 0 1 1 0 8 0 amappl7 128 108 0 98 1 0 1 1 0 8 0 amappl6 120 195 0 191 1 0 1 1 0 8 0 amappl5 112 113 0 106 1 0 1 1 0 8 0 amappl4 104 291 0 275 1 0 1 1 0 8 0 amappl3 96 4679 0 4564 4 0 4 4 0 8 0 amappl2 88 608 0 553 2 0 2 2 0 8 0 amappl1 80 9981 0 9429 13 0 13 13 0 8 0 amappl 88 6746 0 6568 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 128 254 0 254 1 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 81 0 3 2 0 2 2 0 8 0 uaddrrnd 24 912 0 882 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 912 0 882 1 0 1 1 0 8 0 vmmpekpl 168 8805 0 8773 3 0 3 3 0 8 0 vmmpepl 168 62382 0 60448 101 10 91 93 0 357 6 vmsppl 360 911 0 882 4 1 3 4 0 8 0 rwobjpl 32 20845 0 16803 33 0 33 33 0 8 0 pdppl 4096 1831 0 1764 99 32 67 83 0 8 0 pvpl 32 393850 0 383262 151 32 119 119 0 265 24 pmappl 216 911 0 882 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 307 0 63 8 1 7 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a7c3c48,ffff80003c93bd10,ffff80003c93bc60) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7c3c48,ffff80003c93bd10,ffff80003c93bc60) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c93bd10) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c93bd10) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78b02aca6e0, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a7c3c48,ffff80003c93bd10,ffff80003c93bc60) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7c3c48,ffff80003c93bd10,ffff80003c93bc60) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c93bd10) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c93bd10) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78b02aca6e0, count: -3