kernel: protection fault trap, code=0 Stopped at sys_semop+0x45b: movzwl 0(%rax),%r15d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace sys_semop(ffff80003c507c58,ffff80002f0aad50,ffff80002f0aaca0) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff80002f0aad50) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002f0aad50) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2f4ec53ca10, count: -3 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002f0aac70 rbx 0 rdx 0 rcx 0xffff80003c507c58 rax 0xdeafbeaddeafbead r8 0x7f7fffffc000 r9 0x1 r10 0xcf569a82bc529e3 r11 0x908315f6bbf74078 r12 0xffff800001478a04 r13 0 r14 0xffff80002f0aad50 r15 0 rip 0xffffffff81c78f2b sys_semop+0x45b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002f0aab50 ss 0x10 sys_semop+0x45b: movzwl 0(%rax),%r15d ddb{1}> show proc PROC (syz-executor) tid=84590 pid=98661 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=81, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c5074a8,0xffff80003c5067e8 process=0xffff8000ffff44b8 user=0xffff80002f0a5000, vmspace=0xfffffd80672943b8 estcpu=31, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51159 288014 30160 0 2 0 syz-executor 51159 467502 30160 0 3 0x4000080 fsleep syz-executor 98661 369125 74317 0 2 0 syz-executor *98661 84590 74317 0 7 0x4000000 syz-executor 98661 500020 74317 0 2 0x4000001 syz-executor 38818 72814 45174 0 2 0x1 syz-executor 38818 188325 45174 0 2 0x4000001 syz-executor 38818 72300 45174 0 3 0x4000080 fsleep syz-executor 24321 98086 29589 0 2 0x10 syz-executor 24321 402275 29589 0 2 0x4000010 syz-executor 24321 26290 29589 0 2 0x4000010 syz-executor 93723 261890 25572 0 2 0x1 syz-executor 93723 390678 25572 0 3 0x4000080 fsleep syz-executor 93723 76068 25572 0 3 0x4000080 fsleep syz-executor 45970 214512 8846 0 2 0x1 syz-executor 45970 270874 8846 0 2 0x4000001 syz-executor 45970 217522 8846 0 3 0x4000080 fsleep syz-executor 8923 92675 24612 0 2 0 syz-executor 8923 322867 24612 0 2 0x4000000 syz-executor 8923 482499 24612 0 3 0x4000080 fsleep syz-executor 1151 486435 80419 60928 2 0x11 syz-executor 1151 416648 80419 60928 3 0x4000090 kqread syz-executor 1151 165071 80419 60928 3 0x4000090 fsleep syz-executor 1151 50083 80419 60928 3 0x4000090 fsleep syz-executor 77688 251039 0 0 3 0x14200 acct acct 83417 176372 45199 0 3 0x82 sbwait sshd-session 70515 35007 0 0 3 0x14200 bored sosplice 24612 435560 61739 0 2 0x3 syz-executor 8846 68439 61739 0 2 0x3 syz-executor 45174 43729 61739 0 2 0x3 syz-executor 29589 15407 61739 0 2 0x3 syz-executor 74317 43314 61739 0 2 0x3 syz-executor 25572 269433 61739 0 3 0x82 nanoslp syz-executor 80419 493734 61739 0 7 0x3 syz-executor 30160 500585 61739 0 3 0x82 nanoslp syz-executor 61739 136710 80940 0 3 0x82 kqread syz-executor 80940 495052 33062 0 3 0x10008a sigsusp ksh 33062 100854 2507 0 3 0x98 kqread sshd-session 2507 261747 45199 0 3 0x92 kqread sshd-session 92898 439108 1 0 3 0x100083 ttyin getty 45199 295303 1 0 3 0x88 kqread sshd 84490 247366 41932 74 3 0x1100092 bpf pflogd 41932 423695 1 0 3 0x80 sbwait pflogd 30587 515491 12320 73 3 0x1100090 kqread syslogd 12320 490606 1 0 3 0x100082 sbwait syslogd 23770 96580 1 0 3 0x100080 kqread resolvd 48074 279161 17708 77 3 0x100092 kqread dhcpleased 78848 38743 17708 77 3 0x100092 kqread dhcpleased 17708 242000 1 0 3 0x80 kqread dhcpleased 4867 236957 0 0 3 0x14200 bored smr 39084 6722 0 0 2 0x14200 zerothread 25981 55522 0 0 3 0x14200 aiodoned aiodoned 7922 492041 0 0 3 0x14200 syncer update 75714 115650 0 0 3 0x14200 cleaner cleaner 57088 35366 0 0 3 0x14200 reaper reaper 8770 182195 0 0 3 0x14200 pgdaemon pagedaemon 19452 77550 0 0 3 0x14200 bored viomb 72525 182262 0 0 3 0x40014200 acpi0 acpi0 65904 202182 0 0 3 0x40014200 idle1 46458 130388 0 0 3 0x14200 bored softnet3 28674 461553 0 0 3 0x14200 bored softnet2 14057 74791 0 0 3 0x14200 bored softnet1 14324 412115 0 0 3 0x14200 bored softnet0 47599 415176 0 0 3 0x14200 bored systqmp 76439 52871 0 0 3 0x14200 bored systq 14128 148864 0 0 3 0x14200 tmoslp softclockmp 92448 254078 0 0 3 0x40014200 tmoslp softclock 7268 234637 0 0 3 0x40014200 idle0 1 505078 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 98661 (syz-executor) thread 0xffff80003c507c58 (84590) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838b5470) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 yield+0x6a sys/kern/sched_bsd.c:320 #4 malloc+0xe5 sys/kern/kern_malloc.c:174 #5 sys_semop+0x234 sys/kern/sysv_sem.c:564 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10202 11086K 12487K 166960K 12226 0 pcb 17 16K 18K 166960K 166 0 rtable 196 8K 9K 166960K 393 0 pf 36 18K 23K 166960K 120 0 ifaddr 35 5K 7K 166960K 69 0 ifgroup 54 2K 3K 166960K 115 0 sysctl 4 1K 1K 166960K 4 0 counters 62 36K 37K 166960K 118 0 ioctlops 0 0K 4K 166960K 1534 0 iov 0 0K 24K 166960K 40 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1401 88K 88K 166960K 1775 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 13 5K 5K 166960K 21 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 631 0 sigio 0 0K 0K 166960K 4 0 proc 72 91K 128K 166960K 584 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 137 0 in_multi 75 5K 7K 166960K 116 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 418 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 248 73K 91K 166960K 7801 0 UVM aobj 83 3K 4K 166960K 84 0 pinsyscall 45 90K 105K 166960K 1732 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 18 0 NDP 11 0K 2K 166960K 47 0 temp 51 8635K 8710K 166960K 22343 0 kqueue 15 24K 30K 166960K 120 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 189 0 185 4 1 3 3 0 8 2 rtentry 112 119 0 33 4 0 4 4 0 8 0 unpcb 144 697 0 680 10 6 4 6 0 8 3 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 808 222 0 213 11 9 2 7 0 8 0 arp 120 18 0 6 1 0 1 1 0 8 0 inpcb 376 766 0 753 20 12 8 14 0 8 6 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 136 26 0 6 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 20 0 20 2 1 1 1 0 8 1 pppxif 1472 3 0 3 1 0 1 1 0 8 1 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 56 0 13 1 0 1 1 0 8 0 pfstkey 128 56 0 13 2 0 2 2 0 8 0 pfstate 376 56 0 13 5 0 5 5 0 8 0 pfrule 1344 33 0 20 3 1 2 2 0 8 0 rttmr 136 1 0 0 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 492 0 122 29 0 29 29 0 8 2 art_table 32 494 0 122 4 0 4 4 0 8 0 art_node 16 118 0 41 1 0 1 1 0 8 0 sysvmsgpl 40 42 0 2 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 16 0 6 2 1 1 1 0 8 0 shmpl 112 81 0 1 3 0 3 3 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2508 0 1000 95 0 95 95 0 8 0 ffsino 280 2508 0 1000 109 0 109 109 0 8 0 nchpl 144 3430 0 1747 63 0 63 63 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 uvmvnodes 80 2852 0 0 59 0 59 59 0 8 0 vnodes 216 2852 0 0 159 0 159 159 0 8 0 namei 1024 10946 0 10945 1 0 1 1 0 8 0 percpumem 16 73 0 28 1 0 1 1 0 8 0 kstatmem 264 62 0 40 3 1 2 3 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 10779 0 10779 8 2 6 6 1 8 6 plimitpl 152 88 0 69 1 0 1 1 0 8 0 sigapl 424 936 0 883 7 1 6 7 0 8 0 futexpl 64 7595 0 7587 1 0 1 1 0 8 0 knotepl 120 502 0 0 15 0 15 15 0 8 0 kqueuepl 216 250 0 237 3 2 1 3 0 8 0 pipepl 328 147 0 119 3 0 3 3 0 8 0 fdescpl 504 916 0 883 5 0 5 5 0 8 0 filepl 152 5340 0 5104 18 5 13 16 0 8 3 lockfpl 104 319 0 317 2 1 1 2 0 8 0 lockfspl 48 80 0 78 1 0 1 1 0 8 0 sessionpl 144 26 0 16 1 0 1 1 0 8 0 pgrppl 48 47 0 28 1 0 1 1 0 8 0 ucredpl 104 622 0 606 1 0 1 1 0 8 0 zombiepl 144 1124 0 1124 2 1 1 1 0 8 1 processpl 1176 936 0 883 5 0 5 5 0 8 0 procpl 656 1852 0 1783 7 0 7 7 0 8 1 srpgc 96 4 0 4 1 0 1 1 0 8 1 sockpl 688 1663 0 1629 22 12 10 16 0 8 5 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 124 0 0 16 0 16 16 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 20 0 0 1 0 1 1 0 8 0 mbufpl 256 269 0 0 17 0 17 17 0 8 0 bufpl 280 3425 0 131 236 0 236 236 0 8 0 anonpl 24 143224 0 139525 36 11 25 33 0 184 1 amapchunkpl 152 25060 0 24516 34 7 27 29 0 158 5 amappl16 200 2494 0 2457 6 3 3 5 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 118 0 105 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 1638 0 1604 4 1 3 3 0 8 0 amappl11 160 64 0 50 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 107 0 93 1 0 1 1 0 8 0 amappl6 120 182 0 178 1 0 1 1 0 8 0 amappl5 112 124 0 115 1 0 1 1 0 8 0 amappl4 104 326 0 305 1 0 1 1 0 8 0 amappl3 96 4740 0 4615 4 0 4 4 0 8 0 amappl2 88 682 0 613 2 0 2 2 0 8 0 amappl1 80 10195 0 9530 16 2 14 14 0 8 0 amappl 88 7379 0 7192 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 128 255 0 255 3 3 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 83 0 1 2 0 2 2 0 8 0 uaddrrnd 24 916 0 883 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 916 0 883 1 0 1 1 0 8 0 vmmpekpl 168 9346 0 9311 3 0 3 3 0 8 0 vmmpepl 168 62206 0 60128 95 3 92 92 0 357 1 vmsppl 456 915 0 883 6 1 5 5 0 8 0 rwobjpl 64 22373 0 18378 65 0 65 65 0 8 0 pdppl 4096 1840 0 1766 108 34 74 86 0 8 0 pvpl 32 11755 0 0 95 0 95 95 0 265 0 pmappl 248 915 0 883 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 300 0 47 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff837abff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff838b5268) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838b5268) at __mp_lock+0x192 sys/kern/kern_lock.c:144 ktrstruct(ffff80002a369498,ffffffff83339f80,ffff80002a3f07b0,10) at ktrstruct+0xe2 sys/kern/kern_ktrace.c:313 sys_nanosleep(ffff80002a369498,ffff80002a3f08f0,ffff80002a3f0840) at sys_nanosleep+0x109 sys/kern/kern_time.c:294 syscall(ffff80002a3f08f0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3f08f0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e8edff0ec70, count: -8 ddb{0}> machine ddbcpu 1 Stopped at sys_semop+0x45b: movzwl 0(%rax),%r15d ddb{1}> trace sys_semop(ffff80003c507c58,ffff80002f0aad50,ffff80002f0aaca0) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff80002f0aad50) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002f0aad50) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2f4ec53ca10, count: -3