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(ffff80002a79b4b0,ffff80002a7b34d0,ffff80002a7b3420) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a79b4b0,ffff80002a7b34d0,ffff80002a7b3420) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002a7b34d0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7b34d0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7397ec38db0, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80002a7b33f0 rbx 0 rdx 0xffff80000143eb80 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0xf93ba45357ab66b8 r11 0x41b3ce44a9dd886f r12 0xfffffd806f5f6f28 r13 0xdead4110dead4110 r14 0xffff800001494700 r15 0xa rip 0xffffffff816031d2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a7b3350 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=474687 pid=39436 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=0xffff80002a79a7e0,0xffff80003c93a558 process=0xffff8000361144a0 user=0xffff80002a7ae000, vmspace=0xfffffd806c0cb450 estcpu=33, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 87068 176181 27884 0 2 0 syz-executor 87068 25190 27884 0 3 0x4000080 fsleep syz-executor 15893 467960 15354 0 2 0 syz-executor 15893 70237 15354 0 3 0x4000080 fsleep syz-executor 83851 76980 7547 0 2 0 syz-executor 83851 390356 7547 0 2 0x4000000 syz-executor 72358 427620 67856 0 2 0 syz-executor 72358 419112 67856 0 3 0x4000080 fsleep syz-executor 75422 249279 2868 0 2 0 syz-executor 75422 365436 2868 0 3 0x4000080 fsleep syz-executor 28484 144950 26922 0 2 0 syz-executor 28484 191962 26922 0 3 0x4000080 fsleep syz-executor 88986 192060 35291 0 2 0 syz-executor 88986 235229 35291 0 3 0x4000080 sbwait syz-executor 88986 293522 35291 0 3 0x4000080 fsleep syz-executor 39436 65756 24829 0 2 0 syz-executor *39436 474687 24829 0 7 0x4000000 syz-executor 39436 364338 24829 0 3 0x4000080 fsleep syz-executor 39436 193558 24829 0 2 0x4000000 syz-executor 77815 230593 0 0 3 0x14200 bored sosplice 35291 201687 8151 0 3 0x82 nanoslp syz-executor 2868 203470 8151 0 3 0x82 nanoslp syz-executor 26922 194980 8151 0 3 0x82 nanoslp syz-executor 27884 45349 8151 0 3 0x82 nanoslp syz-executor 7547 222892 8151 0 3 0x82 nanoslp syz-executor 67856 213978 8151 0 3 0x82 nanoslp syz-executor 15354 453208 8151 0 3 0x82 nanoslp syz-executor 24829 451288 8151 0 3 0x82 nanoslp syz-executor 8151 435901 8037 0 3 0x82 kqread syz-executor 8037 355853 18542 0 3 0x10008a sigsusp ksh 18542 233897 83639 0 3 0x98 kqread sshd-session 83639 48281 1677 0 3 0x92 kqread sshd-session 32300 224632 1 0 3 0x100083 ttyin getty 1677 285988 1 0 3 0x88 kqread sshd 10077 319699 35816 73 3 0x1100090 kqread syslogd 35816 416587 1 0 3 0x100082 sbwait syslogd 65980 205852 1 0 3 0x100080 kqread resolvd 74567 444752 0 0 3 0x14200 bored smr 76240 178125 0 0 2 0x14200 zerothread 93122 263135 0 0 3 0x14200 aiodoned aiodoned 96654 168364 0 0 3 0x14200 syncer update 85726 489325 0 0 3 0x14200 cleaner cleaner 65114 99423 0 0 3 0x14200 reaper reaper 98057 156606 0 0 3 0x14200 pgdaemon pagedaemon 87142 393044 0 0 3 0x14200 bored viomb 81314 390153 0 0 3 0x40014200 acpi0 acpi0 12535 333358 0 0 3 0x14200 bored softnet3 39164 153376 0 0 3 0x14200 bored softnet2 25516 402525 0 0 3 0x14200 bored softnet1 37168 470021 0 0 3 0x14200 bored softnet0 27303 33420 0 0 3 0x14200 bored systqmp 38104 430738 0 0 3 0x14200 bored systq 78442 343454 0 0 3 0x40014200 tmoslp softclock 88163 454567 0 0 3 0x40014200 idle0 1 281249 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 10176 11049K 11318K 166960K 11489 0 pcb 17 13K 14K 166960K 118 0 rtable 221 7K 7K 166960K 396 0 pf 32 13K 17K 166960K 68 0 ifaddr 42 7K 7K 166960K 60 0 ifgroup 54 2K 2K 166960K 85 0 sysctl 4 1K 9K 166960K 17 0 counters 33 17K 18K 166960K 48 0 ioctlops 0 0K 4K 166960K 78 0 iov 1 12K 12K 166960K 18 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1347 85K 85K 166960K 1554 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 15 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 499 0 sigio 0 0K 0K 166960K 15 0 proc 54 43K 91K 166960K 497 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 48 0 in_multi 96 7K 7K 166960K 113 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 4 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 380 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 211 126K 161K 166960K 6141 0 UVM aobj 40 2K 2K 166960K 40 0 pinsyscall 33 66K 96K 166960K 1529 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 12 0K 2K 166960K 38 0 temp 43 8679K 8747K 166960K 33308 0 kqueue 8 14K 26K 166960K 93 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 94 0 92 2 1 1 2 0 8 0 rtentry 136 120 0 20 4 0 4 4 0 8 0 unpcb 144 271 0 261 3 0 3 3 0 8 2 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 121 0 114 4 0 4 4 0 8 3 arp 88 20 0 1 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 1 1 0 1 1 0 8 0 inpcb 328 530 0 522 7 0 7 7 0 8 6 ip6q 72 2 0 2 1 0 1 1 0 8 1 ip6af 40 4 0 4 1 0 1 1 0 8 1 nd6 104 26 0 0 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 11 0 11 2 1 1 1 0 8 1 pppxif 1384 3 0 3 1 0 1 1 0 8 1 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 0 1 1 0 8 1 pfrule 1344 2 0 2 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 532 0 109 30 0 30 30 0 8 3 art_table 32 533 0 109 4 0 4 4 0 8 0 art_node 16 118 0 29 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 5 1 0 1 1 0 8 1 semapl 112 12 0 3 1 0 1 1 0 8 0 shmpl 112 37 0 0 2 0 2 2 0 8 0 dirhash 1024 24 0 7 3 0 3 3 0 8 0 dino2pl 256 2205 0 702 95 0 95 95 0 8 0 ffsino 248 2205 0 702 95 0 95 95 0 8 0 nchpl 144 2929 0 1251 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 2364 0 0 49 0 49 49 0 8 0 vnodes 216 2364 0 0 132 0 132 132 0 8 0 namei 1024 9627 0 9626 2 1 1 2 0 8 0 kstatmem 264 44 0 20 2 0 2 2 0 8 0 scxspl 216 9629 0 9629 9 1 8 8 1 8 8 plimitpl 152 86 0 71 1 0 1 1 0 8 0 sigapl 424 774 0 730 7 1 6 7 0 8 0 knotepl 120 155726 0 155693 10 0 10 10 0 8 8 kqueuepl 184 196 0 188 4 0 4 4 0 8 3 pipepl 296 130 0 103 3 0 3 3 0 8 0 fdescpl 440 757 0 730 5 1 4 5 0 8 0 filepl 120 4265 0 4067 12 1 11 11 0 8 4 lockfpl 104 157 0 155 1 0 1 1 0 8 0 lockfspl 48 68 0 66 1 0 1 1 0 8 0 sessionpl 144 22 0 15 1 0 1 1 0 8 0 pgrppl 48 41 0 26 1 0 1 1 0 8 0 ucredpl 104 636 0 628 1 0 1 1 0 8 0 zombiepl 144 973 0 973 2 1 1 1 0 8 1 processpl 1160 774 0 730 4 0 4 4 0 8 0 procpl 656 1417 0 1361 7 1 6 6 0 8 0 sosppl 168 3 0 3 1 0 1 1 0 8 1 sockpl 528 906 0 886 9 2 7 7 0 8 5 mcl64k 65536 26 0 25 2 1 1 1 0 8 0 mcl16k 16384 14 0 14 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 10 0 10 2 1 1 1 0 8 1 mcl4k 4096 2963 0 2912 15 7 8 15 0 8 1 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 637 0 637 2 1 1 1 0 8 1 mtagpl 96 7 0 5 1 0 1 1 0 8 0 mbufpl 256 8270 0 8088 13 0 13 13 0 8 0 bufpl 280 3274 0 117 226 0 226 226 0 8 0 anonpl 24 105457 0 99559 61 1 60 60 0 187 19 amapchunkpl 152 18577 0 18038 27 1 26 26 0 158 5 amappl16 200 1351 0 1208 22 4 18 20 0 8 8 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl14 184 130 0 123 1 0 1 1 0 8 0 amappl13 176 17 0 17 1 1 0 1 0 8 0 amappl12 168 1365 0 1338 3 1 2 3 0 8 0 amappl11 160 40 0 36 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 269 0 269 1 1 0 1 0 8 0 amappl8 136 19 0 16 1 0 1 1 0 8 0 amappl7 128 92 0 85 1 0 1 1 0 8 0 amappl6 120 165 0 162 1 0 1 1 0 8 0 amappl5 112 107 0 104 1 0 1 1 0 8 0 amappl4 104 280 0 266 1 0 1 1 0 8 0 amappl3 96 3700 0 3598 4 0 4 4 0 8 1 amappl2 88 618 0 577 2 0 2 2 0 8 0 amappl1 80 9731 0 9273 13 1 12 13 0 8 1 amappl 88 5434 0 5269 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 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 39 0 0 1 0 1 1 0 8 0 uaddrrnd 24 757 0 730 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 757 0 730 1 0 1 1 0 8 0 vmmpekpl 168 7669 0 7634 3 0 3 3 0 8 0 vmmpepl 168 52507 0 50784 87 3 84 84 0 357 6 vmsppl 360 756 0 730 4 1 3 4 0 8 0 rwobjpl 32 17907 0 14682 28 0 28 28 0 8 0 pdppl 4096 1521 0 1460 101 40 61 83 0 8 0 pvpl 32 322585 0 311202 136 6 130 130 0 265 31 pmappl 216 756 0 730 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 276 0 54 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a79b4b0,ffff80002a7b34d0,ffff80002a7b3420) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a79b4b0,ffff80002a7b34d0,ffff80002a7b3420) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002a7b34d0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7b34d0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7397ec38db0, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a79b4b0,ffff80002a7b34d0,ffff80002a7b3420) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a79b4b0,ffff80002a7b34d0,ffff80002a7b3420) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002a7b34d0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7b34d0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7397ec38db0, count: -3