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(ffff80002a7f0020,ffff80003c96f070,ffff80003c96efc0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f0020,ffff80003c96f070,ffff80003c96efc0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c96f070) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96f070) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe2ef3a72950, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c96ef90 rbx 0 rdx 0xffff8000014783c0 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x737dd918173323c8 r11 0xcdf4e92ff53ff956 r12 0xfffffd8063623e10 r13 0xdeaf4152deaf4152 r14 0xffff800001492e00 r15 0xa rip 0xffffffff813f4202 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c96eef0 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=255315 pid=23553 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=0xffff80002a7f0540,0xffff800031912a88 process=0xffff80002a824930 user=0xffff80003c96a000, vmspace=0xfffffd806c2ac448 estcpu=33, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 76401 39855 76485 0 2 0 syz-executor 76401 288087 76485 0 3 0x4000080 fsleep syz-executor 41810 50971 37358 0 2 0 syz-executor 41810 175883 37358 0 3 0x4000080 fsleep syz-executor 23553 504498 50821 0 2 0 syz-executor *23553 255315 50821 0 7 0x4000000 syz-executor 23553 183579 50821 0 3 0x4000080 fsleep syz-executor 23553 41849 50821 0 2 0x4000000 syz-executor 9140 466093 19989 0 2 0 syz-executor 9140 18677 19989 0 3 0x4000080 kqread syz-executor 9140 56553 19989 0 2 0x4000000 syz-executor 9140 66566 19989 0 2 0x4000000 syz-executor 2048 381277 75008 0 2 0x1 syz-executor 2048 429691 75008 0 3 0x4000080 fsleep syz-executor 21362 55093 16929 0 2 0 syz-executor 21362 174798 16929 0 2 0x4000001 syz-executor 99833 459966 32596 0 2 0 syz-executor 99833 118131 32596 0 3 0x4000080 kqsel syz-executor 99833 504555 32596 0 2 0x4000001 syz-executor 99833 344258 32596 0 3 0x4000080 fsleep syz-executor 62067 14812 0 0 3 0x14280 nfsidl nfsio 51661 347117 0 0 3 0x14280 nfsidl nfsio 81000 408271 0 0 3 0x14280 nfsidl nfsio 69709 374627 0 0 3 0x14280 nfsidl nfsio 13259 305660 0 0 3 0x14280 nfsidl nfsio 64644 397738 0 0 3 0x14280 nfsidl nfsio 77718 117997 0 0 3 0x14280 nfsidl nfsio 91190 460796 0 0 3 0x14280 nfsidl nfsio 97508 246679 0 0 3 0x14280 nfsidl nfsio 1768 39533 0 0 3 0x14280 nfsidl nfsio 15808 406838 0 0 3 0x14280 nfsidl nfsio 3942 367366 0 0 3 0x14280 nfsidl nfsio 64620 469936 0 0 3 0x14280 nfsidl nfsio 82448 328637 0 0 3 0x14280 nfsidl nfsio 95514 364056 0 0 3 0x14280 nfsidl nfsio 54567 202083 0 0 3 0x14280 nfsidl nfsio 5147 68576 0 0 3 0x14280 nfsidl nfsio 934 502198 0 0 3 0x14280 nfsidl nfsio 61025 194654 0 0 3 0x14280 nfsidl nfsio 87493 81574 0 0 3 0x14280 nfsidl nfsio 75008 362263 35964 0 3 0x82 nanoslp syz-executor 46825 282771 0 0 3 0x14200 bored sosplice 50821 418001 35964 0 3 0x82 nanoslp syz-executor 32596 304099 35964 0 2 0x3 syz-executor 64242 209791 35964 0 2 0x3 syz-executor 19989 387284 35964 0 3 0x82 nanoslp syz-executor 37358 468409 35964 0 3 0x82 nanoslp syz-executor 76485 126078 35964 0 3 0x82 nanoslp syz-executor 16929 296368 35964 0 3 0x82 nanoslp syz-executor 35964 187889 68870 0 3 0x82 kqread syz-executor 68870 12515 26732 0 3 0x10008a sigsusp ksh 26732 189729 66335 0 3 0x98 kqread sshd-session 66335 315556 46988 0 3 0x92 kqread sshd-session 10145 14711 1 0 3 0x100083 ttyin getty 46988 38016 1 0 3 0x88 kqread sshd 36209 65234 17919 73 3 0x1100090 kqread syslogd 17919 131240 1 0 3 0x100082 sbwait syslogd 40878 257948 1 0 3 0x100080 kqread resolvd 42784 124188 70327 77 3 0x100092 kqread dhcpleased 43992 118927 70327 77 3 0x100092 kqread dhcpleased 70327 35696 1 0 3 0x80 kqread dhcpleased 30445 308133 0 0 3 0x14200 bored smr 30784 247368 0 0 2 0x14200 zerothread 98989 275817 0 0 3 0x14200 aiodoned aiodoned 70641 125231 0 0 3 0x14200 syncer update 42212 247688 0 0 3 0x14200 cleaner cleaner 47571 284225 0 0 3 0x14200 reaper reaper 96694 355107 0 0 3 0x14200 pgdaemon pagedaemon 42615 65672 0 0 3 0x14200 bored viomb 30460 198212 0 0 3 0x40014200 acpi0 acpi0 56797 220155 0 0 3 0x14200 bored softnet3 98104 131013 0 0 3 0x14200 bored softnet2 20662 330703 0 0 3 0x14200 bored softnet1 90008 102598 0 0 3 0x14200 bored softnet0 11609 170453 0 0 3 0x14200 bored systqmp 28326 289822 0 0 3 0x14200 bored systq 52587 52627 0 0 3 0x40014200 tmoslp softclock 10332 229876 0 0 3 0x40014200 idle0 1 378239 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 10197 11165K 11833K 166960K 12625 0 pcb 17 13K 14K 166960K 158 0 rtable 189 8K 10K 166960K 535 0 pf 26 12K 15K 166960K 74 0 ifaddr 30 5K 7K 166960K 71 0 ifgroup 42 1K 2K 166960K 106 0 sysctl 4 1K 9K 166960K 11 0 counters 30 17K 18K 166960K 185 0 ioctlops 0 0K 4K 166960K 309 0 iov 0 0K 20K 166960K 42 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1431 90K 90K 166960K 2012 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 10K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 18 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 725 0 sigio 0 0K 0K 166960K 7 0 proc 60 59K 91K 166960K 561 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 62 4K 7K 166960K 142 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 449 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 237 155K 169K 166960K 8231 0 UVM aobj 22 2K 2K 166960K 22 0 pinsyscall 39 78K 94K 166960K 1788 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 9 0K 2K 166960K 49 0 temp 51 8681K 8746K 166960K 30639 0 kqueue 14 22K 32K 166960K 133 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 120 128 0 125 2 0 2 2 0 8 1 rtentry 136 150 0 69 4 0 4 4 0 8 0 unpcb 144 523 0 507 9 3 6 6 0 8 5 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 808 179 0 173 4 3 1 4 0 8 0 arp 88 23 0 10 1 0 1 1 0 8 0 ipq 40 4 0 1 1 0 1 1 0 8 0 ipqe 40 8 0 3 1 0 1 1 0 8 0 inpcb 328 735 0 725 8 4 4 6 0 8 3 nd6 104 32 0 17 1 0 1 1 0 8 0 pkpcb 40 7 0 7 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 146 0 146 1 0 1 1 0 8 1 pppxif 1384 1 0 1 1 0 1 1 0 8 1 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pfrule 1344 2 0 1 1 0 1 1 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 652 0 336 29 2 27 29 0 8 5 art_table 32 655 0 336 4 0 4 4 0 8 0 art_node 16 146 0 73 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 19 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2688 0 1192 95 0 95 95 0 8 0 ffsino 248 2688 0 1192 95 0 95 95 0 8 0 nchpl 144 3669 0 1980 63 0 63 63 0 8 0 rtmask 32 4 0 4 2 1 1 1 0 8 1 uvmvnodes 80 3169 0 0 65 0 65 65 0 8 0 vnodes 216 3169 0 0 177 0 177 177 0 8 0 namei 1024 11927 0 11927 3 2 1 2 0 8 1 kstatmem 264 58 0 40 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 11173 0 11173 10 2 8 8 1 8 8 plimitpl 152 159 0 143 1 0 1 1 0 8 0 sigapl 424 1025 0 958 8 0 8 8 0 8 0 knotepl 120 26215 0 26167 34 24 10 24 0 8 8 kqueuepl 184 202 0 190 1 0 1 1 0 8 0 pipepl 296 225 0 198 3 0 3 3 0 8 0 fdescpl 440 988 0 958 5 1 4 5 0 8 0 filepl 120 5699 0 5482 14 3 11 11 0 8 3 lockfpl 104 149 0 145 1 0 1 1 0 8 0 lockfspl 48 66 0 62 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 47 0 31 1 0 1 1 0 8 0 ucredpl 104 746 0 733 1 0 1 1 0 8 0 zombiepl 144 1204 0 1203 1 0 1 1 0 8 0 processpl 1160 1025 0 958 5 0 5 5 0 8 0 procpl 656 2022 0 1941 8 0 8 8 0 8 1 sosppl 168 3 0 3 2 1 1 1 0 8 1 sockpl 528 1408 0 1376 16 5 11 12 0 8 8 mcl64k 65536 14 0 14 2 1 1 1 0 8 1 mcl8k 8192 10 0 10 2 1 1 1 0 8 1 mcl4k 4096 3235 0 3181 15 7 8 15 0 8 0 mcl2k 2048 767 0 764 3 1 2 2 0 8 1 mtagpl 96 65 0 44 2 0 2 2 0 8 0 mbufpl 256 10851 0 10683 21 0 21 21 0 8 5 bufpl 280 3523 0 118 244 0 244 244 0 8 0 anonpl 24 143230 0 139957 55 23 32 46 0 187 8 amapchunkpl 152 26879 0 26358 37 5 32 32 0 158 11 amappl16 200 2192 0 2161 17 13 4 16 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 108 0 98 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1613 0 1583 2 0 2 2 0 8 0 amappl11 160 49 0 39 1 0 1 1 0 8 0 amappl10 152 12 0 11 1 0 1 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 22 0 21 1 0 1 1 0 8 0 amappl7 128 102 0 92 1 0 1 1 0 8 0 amappl6 120 179 0 176 1 0 1 1 0 8 0 amappl5 112 113 0 107 1 0 1 1 0 8 0 amappl4 104 315 0 296 1 0 1 1 0 8 0 amappl3 96 5181 0 5062 4 0 4 4 0 8 0 amappl2 88 635 0 576 2 0 2 2 0 8 0 amappl1 80 10497 0 9945 13 0 13 13 0 8 0 amappl 88 7451 0 7277 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 7 0 7 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 21 0 20 1 0 1 1 0 8 0 aobjpl 72 21 0 0 1 0 1 1 0 8 0 uaddrrnd 24 988 0 958 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 988 0 958 1 0 1 1 0 8 0 vmmpekpl 168 9311 0 9272 3 0 3 3 0 8 0 vmmpepl 168 66210 0 64284 94 8 86 94 0 357 2 vmsppl 360 987 0 958 4 1 3 4 0 8 0 rwobjpl 32 21921 0 17860 34 1 33 33 0 8 0 pdppl 4096 1983 0 1916 99 32 67 81 0 8 0 pvpl 32 408926 0 399921 124 28 96 111 0 265 15 pmappl 216 987 0 958 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 283 0 52 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a7f0020,ffff80003c96f070,ffff80003c96efc0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f0020,ffff80003c96f070,ffff80003c96efc0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c96f070) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96f070) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe2ef3a72950, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a7f0020,ffff80003c96f070,ffff80003c96efc0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f0020,ffff80003c96f070,ffff80003c96efc0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c96f070) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96f070) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe2ef3a72950, count: -3