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(ffff80003391e550,ffff80003c9eb0f0,ffff80003c9eb040) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003391e550,ffff80003c9eb0f0,ffff80003c9eb040) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c9eb0f0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9eb0f0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf682fcc040, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c9eb010 rbx 0 rdx 0 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x1fc2cda9855f74cd r11 0xbd4ddb1d46286777 r12 0xfffffd807dd46f28 r13 0xdead4110dead4110 r14 0xffff80000150db00 r15 0xa rip 0xffffffff81917bd2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c9eaf70 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=163677 pid=11452 tcnt=4 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=0xffff80003391e030,0xffff80003391fc70 process=0xffff8000ffff44a0 user=0xffff80003c9e6000, vmspace=0xfffffd807dcf42e0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 84299 322552 13319 0 2 0 syz-executor 84299 109381 13319 0 3 0x4000080 fsleep syz-executor 4122 350979 18203 0 2 0 syz-executor 4122 290438 18203 0 3 0x4000080 fsleep syz-executor 28349 141681 26148 0 2 0 syz-executor 28349 245804 26148 0 3 0x4000080 fsleep syz-executor 11452 459254 65042 0 2 0 syz-executor *11452 163677 65042 0 7 0x4000000 syz-executor 11452 353294 65042 0 3 0x4000080 fsleep syz-executor 11452 289139 65042 0 2 0x4000000 syz-executor 28078 385281 14881 0 2 0 syz-executor 28078 501279 14881 0 2 0x4000000 syz-executor 83635 208305 64461 0 2 0 syz-executor 83635 464875 64461 0 3 0x4000080 kqsel syz-executor 83635 43960 64461 0 2 0x4000000 syz-executor 80685 174666 0 0 3 0x14280 nfsidl nfsio 75412 497040 0 0 3 0x14280 nfsidl nfsio 95845 331677 0 0 3 0x14280 nfsidl nfsio 96905 80184 0 0 3 0x14280 nfsidl nfsio 36240 222004 0 0 3 0x14280 nfsidl nfsio 32611 272133 0 0 3 0x14280 nfsidl nfsio 37187 255969 0 0 3 0x14280 nfsidl nfsio 37991 285410 0 0 3 0x14280 nfsidl nfsio 42110 519497 0 0 3 0x14280 nfsidl nfsio 40103 135136 0 0 3 0x14280 nfsidl nfsio 92820 106818 0 0 3 0x14280 nfsidl nfsio 63248 147413 0 0 3 0x14280 nfsidl nfsio 26612 360749 0 0 3 0x14280 nfsidl nfsio 53153 371674 0 0 3 0x14280 nfsidl nfsio 87187 513987 0 0 3 0x14280 nfsidl nfsio 6823 10973 0 0 3 0x14280 nfsidl nfsio 37204 81574 0 0 3 0x14280 nfsidl nfsio 74707 415744 0 0 3 0x14280 nfsidl nfsio 27443 521290 0 0 3 0x14280 nfsidl nfsio 46181 478088 0 0 3 0x14280 nfsidl nfsio 85540 393782 0 0 3 0x14200 bored sosplice 18203 13014 52469 0 3 0x82 nanoslp syz-executor 14881 314127 52469 0 3 0x82 nanoslp syz-executor 26148 464279 52469 0 3 0x82 nanoslp syz-executor 65042 75152 52469 0 3 0x82 nanoslp syz-executor 13319 384925 52469 0 3 0x82 nanoslp syz-executor 69161 363683 52469 0 3 0x82 nanoslp syz-executor 64461 132771 52469 0 3 0x82 nanoslp syz-executor 93759 288233 52469 0 2 0x2 syz-executor 52469 81020 27642 0 3 0x82 kqread syz-executor 27642 266602 73445 0 3 0x10008a sigsusp ksh 73445 336719 81372 0 3 0x98 kqread sshd-session 81372 256486 65011 0 3 0x92 kqread sshd-session 22385 456667 1 0 3 0x100083 ttyin getty 65011 16194 1 0 3 0x88 kqread sshd 6346 339001 31145 73 3 0x1100090 kqread syslogd 31145 194896 1 0 3 0x100082 sbwait syslogd 53181 71189 1 0 3 0x100080 kqread resolvd 45770 283464 64690 77 3 0x100092 kqread dhcpleased 86691 358111 64690 77 3 0x100092 kqread dhcpleased 64690 44179 1 0 3 0x80 kqread dhcpleased 25331 477715 0 0 3 0x14200 bored smr 42887 319509 0 0 2 0x14200 zerothread 87783 179077 0 0 3 0x14200 aiodoned aiodoned 97056 460569 0 0 3 0x14200 syncer update 76826 491163 0 0 3 0x14200 cleaner cleaner 10261 313130 0 0 3 0x14200 reaper reaper 98394 358297 0 0 3 0x14200 pgdaemon pagedaemon 81994 29603 0 0 3 0x14200 bored viomb 12904 89747 0 0 3 0x40014200 acpi0 acpi0 90842 275248 0 0 3 0x14200 bored softnet3 4234 159859 0 0 3 0x14200 bored softnet2 24224 404759 0 0 3 0x14200 bored softnet1 26619 215730 0 0 3 0x14200 bored softnet0 84547 223035 0 0 3 0x14200 bored systqmp 51895 226143 0 0 3 0x14200 bored systq 4596 24422 0 0 3 0x40014200 tmoslp softclock 12725 205659 0 0 3 0x40014200 idle0 1 30330 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 10217 11183K 11495K 166960K 11732 0 pcb 17 14K 16K 166960K 126 0 rtable 227 7K 8K 166960K 384 0 pf 30 12K 13K 166960K 41 0 ifaddr 42 7K 7K 166960K 52 0 ifgroup 50 2K 2K 166960K 60 0 sysctl 1 1K 9K 166960K 7 0 counters 32 17K 18K 166960K 39 0 ioctlops 0 0K 4K 166960K 110 0 iov 0 0K 12K 166960K 41 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1345 85K 85K 166960K 1535 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 74 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 296 0 sigio 0 0K 0K 166960K 4 0 proc 60 59K 100K 166960K 489 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 16 0 in_multi 99 7K 7K 166960K 102 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 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 588 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 224 151K 160K 166960K 4258 0 UVM aobj 13 2K 2K 166960K 14 0 pinsyscall 38 76K 96K 166960K 1323 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 11 0K 2K 166960K 32 0 temp 48 8684K 8734K 166960K 10460 0 kqueue 13 20K 32K 166960K 59 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 43 0 40 1 0 1 1 0 8 0 rtentry 136 115 0 14 4 0 4 4 0 8 0 unpcb 144 321 0 304 6 0 6 6 0 8 5 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 81 0 76 4 0 4 4 0 8 3 arp 88 18 0 0 1 0 1 1 0 8 0 inpcb 328 276 0 266 7 0 7 7 0 8 6 nd6 104 25 0 1 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 7 0 7 1 0 1 1 0 8 1 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 486 0 43 31 1 30 31 0 8 0 art_table 40 488 0 43 5 0 5 5 0 8 0 art_node 32 115 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semapl 112 72 0 64 1 0 1 1 0 8 0 shmpl 112 11 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1903 0 399 95 0 95 95 0 8 0 ffsino 248 1903 0 399 95 0 95 95 0 8 0 nchpl 144 2319 0 635 63 0 63 63 0 8 0 uvmvnodes 80 2071 0 0 43 0 43 43 0 8 0 vnodes 216 2071 0 0 116 0 116 116 0 8 0 namei 1024 7490 0 7490 3 2 1 2 0 8 1 kstatmem 264 32 0 10 2 0 2 2 0 8 0 scxspl 216 7376 0 7376 4 3 1 4 1 8 1 plimitpl 152 52 0 35 1 0 1 1 0 8 0 sigapl 424 595 0 529 9 1 8 8 0 8 0 knotepl 120 9544 0 9496 17 7 10 10 0 8 8 kqueuepl 184 77 0 65 1 0 1 1 0 8 0 pipepl 296 108 0 81 3 0 3 3 0 8 0 fdescpl 440 558 0 529 5 1 4 5 0 8 0 filepl 120 3109 0 2829 12 0 12 12 0 8 3 lockfpl 104 153 0 85 2 0 2 2 0 8 0 lockfspl 48 45 0 41 1 0 1 1 0 8 0 sessionpl 144 22 0 14 1 0 1 1 0 8 0 pgrppl 48 33 0 17 1 0 1 1 0 8 0 ucredpl 104 415 0 403 1 0 1 1 0 8 0 zombiepl 144 604 0 603 2 1 1 1 0 8 0 processpl 1160 595 0 529 5 0 5 5 0 8 0 procpl 656 872 0 797 7 0 7 7 0 8 0 sockpl 528 645 0 615 13 0 13 13 0 8 10 mcl64k 65536 9 0 9 2 1 1 1 0 8 1 mcl16k 16384 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 9 0 9 2 1 1 1 0 8 1 mcl4k 4096 2660 0 2609 15 7 8 14 0 8 0 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 442 0 434 2 0 2 2 0 8 1 mtagpl 96 18 0 6 1 0 1 1 0 8 0 mbufpl 256 6806 0 6621 18 4 14 16 0 8 1 bufpl 280 2733 0 118 187 0 187 187 0 8 0 anonpl 24 110906 0 107461 57 23 34 45 0 187 8 amapchunkpl 152 13174 0 12696 31 5 26 26 0 158 5 amappl16 200 1765 0 1720 15 11 4 14 0 8 1 amappl15 192 21 0 21 1 1 0 1 0 8 0 amappl14 184 100 0 90 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1168 0 1139 3 1 2 3 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 8 0 7 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 20 0 18 1 0 1 1 0 8 0 amappl7 128 101 0 90 1 0 1 1 0 8 0 amappl6 120 171 0 168 1 0 1 1 0 8 0 amappl5 112 114 0 107 1 0 1 1 0 8 0 amappl4 104 280 0 264 1 0 1 1 0 8 0 amappl3 96 2243 0 2134 4 0 4 4 0 8 0 amappl2 88 619 0 561 2 0 2 2 0 8 0 amappl1 80 8742 0 8197 13 1 12 13 0 8 0 amappl 88 3594 0 3432 5 0 5 5 0 92 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 2 0 2 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 7 0 7 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 13 0 1 1 0 1 1 0 8 0 uaddrrnd 24 558 0 529 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 558 0 529 1 0 1 1 0 8 0 vmmpekpl 168 6141 0 6106 3 0 3 3 0 8 1 vmmpepl 168 41427 0 39572 96 11 85 93 0 357 0 vmsppl 360 557 0 529 4 1 3 4 0 8 0 rwobjpl 32 15735 0 12793 25 1 24 24 0 8 0 pdppl 4096 1123 0 1058 97 30 67 83 0 8 2 pvpl 32 276014 0 266507 137 34 103 113 0 265 16 pmappl 216 557 0 529 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 281 0 50 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80003391e550,ffff80003c9eb0f0,ffff80003c9eb040) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003391e550,ffff80003c9eb0f0,ffff80003c9eb040) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c9eb0f0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9eb0f0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf682fcc040, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80003391e550,ffff80003c9eb0f0,ffff80003c9eb040) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003391e550,ffff80003c9eb0f0,ffff80003c9eb040) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c9eb0f0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9eb0f0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf682fcc040, count: -3