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(ffff800038158fc8,ffff80003c999200,ffff80003c999150) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff800038158fc8,ffff80003c999200,ffff80003c999150) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c999200) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c999200) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e267d7c530, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c999130 rbx 0 rdx 0xffff800001462440 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x120ae14c217aad7a r11 0x9c413d36eb8f7410 r12 0xfffffd8067663f30 r13 0xdeaf4152deaf4152 r14 0xffff80000148b200 r15 0xa rip 0xffffffff821a3172 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c999090 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=491485 pid=39018 tcnt=5 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=0xffff8000381594f8,0xffff800038159a38 process=0xffff80003c9736d8 user=0xffff80003c994000, vmspace=0xfffffd806ba46d00 estcpu=5, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 37995 24963 16908 0 2 0 syz-executor 37995 517508 16908 0 3 0x4000080 fsleep syz-executor 18751 227038 70152 0 2 0 syz-executor 18751 414774 70152 0 3 0x4000080 fsleep syz-executor 4359 461763 41032 0 2 0 syz-executor 4359 223232 41032 0 3 0x4000080 fsleep syz-executor 4359 496833 41032 0 3 0x4000080 fsleep syz-executor 39018 349429 20806 0 2 0 syz-executor *39018 491485 20806 0 7 0x4000000 syz-executor 39018 287794 20806 0 3 0x4000080 fsleep syz-executor 39018 280784 20806 0 2 0x4000000 syz-executor 39018 484333 20806 0 2 0x4000000 syz-executor 88481 432929 29874 0 2 0 syz-executor 88481 28980 29874 0 3 0x4000080 fsleep syz-executor 53934 149883 26024 0 2 0 syz-executor 53934 357537 26024 0 3 0x4000080 fsleep syz-executor 52999 301319 0 0 3 0x14280 nfsidl nfsio 76532 32377 0 0 3 0x14280 nfsidl nfsio 79928 151009 0 0 3 0x14280 nfsidl nfsio 28986 447123 0 0 3 0x14280 nfsidl nfsio 50387 313479 0 0 3 0x14280 nfsidl nfsio 63599 359747 0 0 3 0x14280 nfsidl nfsio 41880 22264 0 0 3 0x14280 nfsidl nfsio 44090 476465 0 0 3 0x14280 nfsidl nfsio 46734 76124 0 0 3 0x14280 nfsidl nfsio 53065 75984 0 0 3 0x14280 nfsidl nfsio 71385 268662 0 0 3 0x14280 nfsidl nfsio 36861 29137 0 0 3 0x14280 nfsidl nfsio 10773 68916 0 0 3 0x14280 nfsidl nfsio 47327 228405 0 0 3 0x14280 nfsidl nfsio 95446 241545 0 0 3 0x14280 nfsidl nfsio 52280 440697 0 0 3 0x14280 nfsidl nfsio 4655 10520 0 0 3 0x14280 nfsidl nfsio 3246 204554 0 0 3 0x14280 nfsidl nfsio 90391 29801 0 0 3 0x14280 nfsidl nfsio 71597 387378 0 0 3 0x14280 nfsidl nfsio 13609 80774 19997 0 2 0x2 syz-executor 55571 57573 19997 0 3 0x82 nanoslp syz-executor 70152 484649 19997 0 3 0x82 nanoslp syz-executor 20806 267799 19997 0 3 0x82 nanoslp syz-executor 16908 297880 19997 0 3 0x82 nanoslp syz-executor 26024 493912 19997 0 3 0x82 nanoslp syz-executor 41032 58062 19997 0 3 0x82 nanoslp syz-executor 29874 227767 19997 0 3 0x82 nanoslp syz-executor 19997 329850 69301 0 3 0x82 kqread syz-executor 69301 82633 74352 0 3 0x10008a sigsusp ksh 74352 365679 22200 0 3 0x98 kqread sshd-session 22200 87175 6937 0 3 0x92 kqread sshd-session 908 320043 1 0 3 0x100083 ttyin getty 6937 70607 1 0 3 0x88 kqread sshd 87168 37768 82455 73 3 0x1100090 kqread syslogd 82455 271755 1 0 3 0x100082 sbwait syslogd 79982 44112 1 0 3 0x100080 kqread resolvd 4943 152423 97366 77 3 0x100092 kqread dhcpleased 37334 29365 97366 77 3 0x100092 kqread dhcpleased 97366 466666 1 0 3 0x80 kqread dhcpleased 86809 471249 0 0 3 0x14200 bored smr 23139 347980 0 0 2 0x14200 zerothread 7849 449907 0 0 3 0x14200 aiodoned aiodoned 55437 512994 0 0 3 0x14200 syncer update 91642 324550 0 0 3 0x14200 cleaner cleaner 20572 111267 0 0 3 0x14200 reaper reaper 2552 258423 0 0 3 0x14200 pgdaemon pagedaemon 83661 331177 0 0 3 0x14200 bored viomb 81845 233359 0 0 3 0x40014200 acpi0 acpi0 32113 332065 0 0 3 0x14200 bored softnet7 91262 88467 0 0 3 0x14200 bored softnet6 2892 459972 0 0 3 0x14200 bored softnet5 6100 198373 0 0 3 0x14200 bored softnet4 76665 406289 0 0 3 0x14200 bored softnet3 81763 338729 0 0 3 0x14200 bored softnet2 29403 421684 0 0 3 0x14200 bored softnet1 18542 118650 0 0 2 0x14200 softnet0 66146 331544 0 0 3 0x14200 bored systqmp 22383 394644 0 0 3 0x14200 bored systq 87340 489631 0 0 3 0x40014200 tmoslp softclock 16167 456766 0 0 3 0x40014200 idle0 1 261342 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 10181 11058K 11179K 166960K 11322 0 pcb 18 12K 12K 166960K 37 0 rtable 229 8K 8K 166960K 313 0 pf 32 13K 15K 166960K 108 0 ifaddr 42 7K 7K 166960K 49 0 ifgroup 50 2K 2K 166960K 64 0 sysctl 1 1K 9K 166960K 5 0 counters 32 17K 18K 166960K 39 0 ioctlops 0 0K 2K 166960K 41 0 iov 0 0K 12K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1340 84K 85K 166960K 1464 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 212 0 sigio 1 0K 0K 166960K 8 0 proc 59 59K 91K 166960K 483 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 8 0 in_multi 99 7K 7K 166960K 100 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 351 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 219 143K 157K 166960K 3392 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 38 76K 93K 166960K 1234 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 11 0K 2K 166960K 31 0 temp 39 8630K 8694K 166960K 3983 0 kqueue 13 20K 24K 166960K 33 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 46 0 43 1 0 1 1 0 8 0 rtentry 136 101 0 3 4 0 4 4 0 8 0 unpcb 144 71 0 56 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 22 0 18 1 0 1 1 0 8 0 arp 88 11 0 0 1 0 1 1 0 8 0 inpcb 328 106 0 96 3 1 2 2 0 8 1 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 104 16 0 0 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 6 0 6 2 1 1 1 0 8 1 pppxif 1384 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pfstitem 24 1 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 1 1 0 1 1 0 8 0 pfstate 384 2 0 1 1 0 1 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 449 0 6 29 0 29 29 0 8 1 art_table 40 453 0 6 5 0 5 5 0 8 0 art_node 32 101 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 2 1 1 1 0 8 1 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1752 0 249 95 0 95 95 0 8 0 ffsino 256 1752 0 249 95 0 95 95 0 8 0 nchpl 144 2035 0 355 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 1857 0 0 38 0 38 38 0 8 0 vnodes 216 1857 0 0 104 0 104 104 0 8 0 namei 1024 6297 0 6297 6 2 4 4 0 8 4 kstatmem 264 30 0 8 2 0 2 2 0 8 0 scxspl 216 7243 0 7243 8 7 1 8 1 8 1 plimitpl 152 39 0 23 1 0 1 1 0 8 0 sigapl 424 513 0 444 9 1 8 8 0 8 0 knotepl 120 6101 0 6054 17 2 15 15 0 8 13 kqueuepl 184 47 0 38 1 0 1 1 0 8 0 pipepl 304 107 0 79 3 0 3 3 0 8 0 fdescpl 448 473 0 444 5 1 4 5 0 8 0 filepl 120 2032 0 1821 10 2 8 10 0 8 1 lockfpl 104 25 0 22 1 0 1 1 0 8 0 lockfspl 48 14 0 11 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 14 1 0 1 1 0 8 0 ucredpl 104 334 0 323 1 0 1 1 0 8 0 zombiepl 144 467 0 466 1 0 1 1 0 8 0 processpl 1168 513 0 444 7 1 6 6 0 8 0 procpl 664 644 0 565 8 0 8 8 0 8 0 sockpl 552 258 0 230 4 1 3 3 0 8 0 mcl64k 65536 5 0 5 2 1 1 1 0 8 1 mcl8k 8192 4 0 4 1 1 0 1 0 8 0 mcl4k 4096 2496 0 2443 15 7 8 14 0 8 0 mcl2k 2048 264 0 261 1 0 1 1 0 8 0 mtagpl 96 69 0 4 2 0 2 2 0 8 0 mbufpl 256 4568 0 4338 15 0 15 15 0 8 0 bufpl 280 3113 0 119 214 0 214 214 0 8 0 anonpl 24 105798 0 102702 34 2 32 32 0 187 11 amapchunkpl 152 10465 0 9989 29 6 23 25 0 158 3 amappl16 200 1945 0 1920 6 3 3 5 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 109 0 99 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1085 0 1055 2 0 2 2 0 8 0 amappl11 160 46 0 36 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 20 0 19 1 0 1 1 0 8 0 amappl7 128 98 0 87 1 0 1 1 0 8 0 amappl6 120 170 0 167 1 0 1 1 0 8 0 amappl5 112 123 0 115 1 0 1 1 0 8 0 amappl4 104 262 0 246 1 0 1 1 0 8 0 amappl3 96 1701 0 1594 3 0 3 3 0 8 0 amappl2 88 664 0 609 2 0 2 2 0 8 0 amappl1 80 8210 0 7660 13 0 13 13 0 8 1 amappl 88 2755 0 2598 4 0 4 4 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 128 253 0 253 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 473 0 444 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 473 0 444 1 0 1 1 0 8 0 vmmpekpl 168 5333 0 5304 2 0 2 2 0 8 0 vmmpepl 168 36432 0 34606 84 1 83 83 0 357 1 vmsppl 368 472 0 444 4 1 3 4 0 8 0 rwobjpl 40 14582 0 11882 28 0 28 28 0 8 0 pdppl 4096 952 0 888 96 30 66 78 0 8 2 pvpl 32 237533 0 229266 99 14 85 85 0 265 10 pmappl 216 472 0 444 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 383 0 47 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff800038158fc8,ffff80003c999200,ffff80003c999150) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff800038158fc8,ffff80003c999200,ffff80003c999150) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c999200) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c999200) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e267d7c530, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff800038158fc8,ffff80003c999200,ffff80003c999150) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff800038158fc8,ffff80003c999200,ffff80003c999150) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c999200) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c999200) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e267d7c530, count: -3