kernel: protection fault trap, code=0 Stopped at sys_semop+0x3f9: movzwl 0(%r15),%r12d 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(ffff80003c018560,ffff80002a3008c0,ffff80002a300810) at sys_semop+0x3f9 sys/kern/sysv_sem.c:602 syscall(ffff80002a3008c0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3008c0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc15ce3749e0, count: -3 ddb{1}> show registers rdi 0 rsi 0xfe78 __ALIGN_SIZE+0xee78 rbp 0xffff80002a3007e0 rbx 0xffff80000156f404 rdx 0 rcx 0xffff80003c018560 rax 0xffff8000299ddff0 r8 0x7f7fffffc000 r9 0x1 r10 0xaa8ff4fec0c74a65 r11 0x7e652659f182c07c r12 0xffff80000156f404 r13 0xfffffe78 r14 0x4152 __ALIGN_SIZE+0x3152 r15 0xdeaf4152deaf4152 rip 0xffffffff832be569 sys_semop+0x3f9 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff80002a3006c0 ss 0x10 sys_semop+0x3f9: movzwl 0(%r15),%r12d ddb{1}> show proc PROC (syz-executor) tid=4185 pid=52109 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c0187f0,0xffff80003c018d20 process=0xffff80003c479d40 user=0xffff80002a2fb000, vmspace=0xfffffd806c2add38 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52109 210955 14185 0 7 0 syz-executor *52109 4185 14185 0 7 0x4000000 syz-executor 52109 451797 14185 0 2 0x4000080 syz-executor 98375 337733 69487 0 3 0x80 nanoslp syz-executor 98375 87808 69487 0 3 0x4000080 fsleep syz-executor 98375 117964 69487 0 3 0x4000080 kqread syz-executor 98375 359933 69487 0 3 0x4000080 fsleep syz-executor 66892 494419 33135 0 2 0 syz-executor 66892 486305 33135 0 3 0x4000080 sbwait syz-executor 66892 139348 33135 0 3 0x4000080 ttyout syz-executor 66892 459172 33135 0 2 0x4000000 syz-executor 66892 336032 33135 0 3 0x4000080 fsleep syz-executor 70626 523784 18471 0 2 0x2 syz-executor 15604 477074 0 0 3 0x14280 nfsidl nfsio 54415 181639 0 0 3 0x14280 nfsidl nfsio 20812 475558 0 0 3 0x14280 nfsidl nfsio 88665 108957 0 0 3 0x14280 nfsidl nfsio 60566 517009 0 0 3 0x14280 nfsidl nfsio 86046 465088 0 0 3 0x14280 nfsidl nfsio 90984 126060 0 0 3 0x14280 nfsidl nfsio 65530 471570 0 0 3 0x14280 nfsidl nfsio 68962 385792 0 0 3 0x14280 nfsidl nfsio 99857 443076 0 0 3 0x14280 nfsidl nfsio 12199 83037 0 0 3 0x14280 nfsidl nfsio 85030 368509 0 0 3 0x14280 nfsidl nfsio 78234 241616 0 0 3 0x14280 nfsidl nfsio 97227 230861 0 0 3 0x14280 nfsidl nfsio 57120 409478 0 0 3 0x14280 nfsidl nfsio 12066 434379 0 0 3 0x14280 nfsidl nfsio 88845 277877 0 0 3 0x14280 nfsidl nfsio 85478 123607 0 0 3 0x14280 nfsidl nfsio 83034 334151 0 0 3 0x14280 nfsidl nfsio 36540 436288 0 0 3 0x14280 nfsidl nfsio 69487 459288 18471 0 3 0x82 nanoslp syz-executor 40783 494184 0 0 3 0x14200 acct acct 11584 217989 18471 0 2 0x2 syz-executor 36124 90502 0 0 3 0x14200 bored sosplice 33135 138584 18471 0 2 0x3 syz-executor 14185 344704 18471 0 3 0x82 nanoslp syz-executor 98520 223265 18471 0 2 0x10000003 syz-executor 7112 477043 18471 0 2 0x2 syz-executor 44401 180600 18471 0 3 0x82 wait syz-executor 18471 415267 53536 0 2 0x2 syz-executor 53536 15607 39533 0 3 0x10008a sigsusp ksh 39533 372104 73463 0 3 0x98 kqread sshd-session 73463 397208 65665 0 3 0x92 kqread sshd-session 57733 241514 1 0 3 0x100083 ttyin getty 65665 13670 1 0 3 0x88 kqread sshd 38174 246675 77484 74 3 0x1100092 bpf pflogd 77484 344909 1 0 3 0x80 sbwait pflogd 83436 391825 63359 73 3 0x1100090 kqread syslogd 63359 278524 1 0 3 0x100082 sbwait syslogd 17635 153424 1 0 3 0x100080 kqread resolvd 76223 311105 60040 77 3 0x100092 kqread dhcpleased 39345 366188 60040 77 3 0x100092 kqread dhcpleased 60040 415946 1 0 3 0x80 kqread dhcpleased 67335 28030 0 0 3 0x14200 bored smr 40043 473269 0 0 2 0x14200 zerothread 25051 342501 0 0 3 0x14200 aiodoned aiodoned 66820 199444 0 0 3 0x14200 syncer update 24601 9303 0 0 3 0x14200 cleaner cleaner 9097 86699 0 0 3 0x14200 reaper reaper 36000 52315 0 0 3 0x14200 pgdaemon pagedaemon 35602 293728 0 0 3 0x14200 bored viomb 70065 365498 0 0 3 0x40014200 acpi0 acpi0 23587 23567 0 0 3 0x40014200 idle1 33224 327891 0 0 3 0x14200 bored softnet3 65731 13337 0 0 3 0x14200 bored softnet2 95383 23842 0 0 3 0x14200 bored softnet1 76409 521759 0 0 2 0x14200 softnet0 64195 417938 0 0 3 0x14200 bored systqmp 37236 266802 0 0 3 0x14200 bored systq 63478 109117 0 0 3 0x14200 tmoslp softclockmp 17812 438170 0 0 3 0x40014200 tmoslp softclock 46308 408335 0 0 3 0x40014200 idle0 1 84226 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 52109 (syz-executor) thread 0xffff80003c018560 (4185) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839d8340) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 malloc+0xe5 sys/kern/kern_malloc.c:174 #3 sys_semop+0x234 sys/kern/sysv_sem.c:564 #4 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #5 Xsyscall+0x128 Process 70626 (syz-executor) thread 0xffff80003c018a80 (523784) exclusive rwlock vmmaplk r = 0 (0xfffffd806c2ada78) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3738 #4 process_new+0x572 sys/kern/kern_fork.c:284 #5 fork1+0x3ea sys/kern/kern_fork.c:410 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd805e8c36d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3729 #4 process_new+0x572 sys/kern/kern_fork.c:284 #5 fork1+0x3ea sys/kern/kern_fork.c:410 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 Process 11584 (syz-executor) thread 0xffff80002a2ba020 (217989) exclusive rwlock vmmaplk r = 0 (0xfffffd806c2ad4d8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3729 #4 process_new+0x572 sys/kern/kern_fork.c:284 #5 fork1+0x3ea sys/kern/kern_fork.c:410 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10234 11042K 11358K 166960K 13497 0 pcb 17 13K 14K 166960K 267 0 rtable 213 10K 11K 166960K 659 0 pf 36 18K 67485K 166960K 156 0 ifaddr 40 7K 8K 166960K 94 0 ifgroup 55 2K 2K 166960K 140 0 sysctl 4 1K 9K 166960K 32 0 counters 68 36K 37K 166960K 162 0 ioctlops 0 0K 4K 166960K 1774 0 iov 0 0K 40K 166960K 183 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1425 90K 90K 166960K 2767 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 52 0 dirhash 15 2K 3K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 236K 166960K 1451 0 sigio 0 0K 0K 166960K 36 0 proc 72 91K 128K 166960K 726 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 128 0 in_multi 81 5K 7K 166960K 175 0 ether_multi 1 0K 0K 166960K 9 0 mrt 1 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 671 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 219 167K 182K 166960K 14999 0 UVM aobj 131 4K 4K 166960K 132 0 pinsyscall 41 82K 102K 166960K 2650 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 67 0 NDP 12 0K 1K 166960K 64 0 temp 112 8695K 8764K 166960K 62053 0 kqueue 14 22K 34K 166960K 280 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 199 0 195 3 2 1 3 0 8 0 rtentry 176 198 0 111 6 1 5 6 0 8 0 unpcb 144 1206 0 1189 11 7 4 6 0 8 3 syncache 336 9 0 9 6 5 1 1 0 8 1 tcpqe 32 3 0 3 3 2 1 1 0 8 1 tcpcb 736 536 0 530 16 9 7 7 0 8 6 arp 128 27 0 9 1 0 1 1 0 8 0 inpcb 328 1345 0 1335 14 7 7 7 0 8 5 nd6 144 35 0 16 1 0 1 1 0 8 0 pkpcb 40 16 0 16 3 2 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 38 0 38 3 2 1 1 0 8 1 pppxif 1504 2 0 2 2 2 0 1 0 8 0 pffrag 232 11 0 2 1 0 1 1 0 482 0 pffrnode 88 10 0 2 1 0 1 1 0 8 0 pffrent 40 14 0 5 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 3 0 1 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 86 0 29 1 0 1 1 0 8 0 pfstkey 128 87 0 30 2 0 2 2 0 8 0 pfstate 384 87 0 30 7 1 6 6 0 8 0 pfrule 1344 30 0 23 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 690 0 309 31 4 27 29 0 8 2 art_table 32 693 0 309 4 0 4 4 0 8 0 art_node 16 163 0 86 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 12 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 46 0 37 1 0 1 1 0 8 0 shmpl 112 129 0 1 4 0 4 4 0 8 0 dirhash 1024 37 0 18 3 0 3 3 0 8 0 dino2pl 256 4044 0 2538 95 0 95 95 0 8 0 ffsino 288 4044 0 2538 109 0 109 109 0 8 0 nchpl 144 6006 0 4303 64 0 64 64 0 8 0 rtmask 32 8 0 8 3 2 1 1 0 8 1 uvmvnodes 80 4983 0 0 102 0 102 102 0 8 0 vnodes 216 4983 0 0 277 0 277 277 0 8 0 namei 1024 20540 0 20540 7 5 2 2 0 8 2 percpumem 16 96 0 47 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 88 0 60 5 2 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 6 0 6 2 1 1 1 0 8 1 scxspl 216 21310 0 21310 15 14 1 8 1 8 1 plimitpl 152 229 0 210 1 0 1 1 0 8 0 sigapl 424 1763 0 1692 11 2 9 9 0 8 0 knotepl 120 575 0 0 17 0 17 17 0 8 0 kqueuepl 224 609 0 533 12 7 5 7 0 8 0 pipepl 336 273 0 246 5 2 3 5 0 8 0 fdescpl 520 1721 0 1691 3 0 3 3 0 8 0 filepl 160 10783 0 10495 24 10 14 16 0 8 0 lockfpl 104 327 0 325 1 0 1 1 0 8 0 lockfspl 48 144 0 142 1 0 1 1 0 8 0 sessionpl 144 31 0 22 1 0 1 1 0 8 0 pgrppl 48 59 0 42 1 0 1 1 0 8 0 ucredpl 104 1519 0 1505 1 0 1 1 0 8 0 zombiepl 144 2437 0 2435 3 2 1 1 0 8 0 processpl 1240 1763 0 1692 7 1 6 6 0 8 0 procpl 656 4093 0 4013 10 2 8 8 0 8 0 srpgc 96 8 0 8 1 0 1 1 0 8 1 sosppl 168 6 0 6 4 3 1 1 0 8 1 sockpl 728 2824 0 2785 36 23 13 16 0 8 8 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 218 0 0 6 0 6 6 0 8 0 mbufpl 256 1365 0 0 85 0 85 85 0 8 0 bufpl 280 6294 0 152 439 0 439 439 0 8 0 anonpl 32 8286 0 0 68 1 67 67 0 246 0 amapchunkpl 152 50664 0 50244 46 17 29 31 0 158 9 amappl16 200 4167 0 4128 23 19 4 12 0 8 0 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 132 0 120 1 0 1 1 0 8 0 amappl13 176 8 0 8 2 2 0 1 0 8 0 amappl12 168 2441 0 2413 3 1 2 2 0 8 0 amappl11 160 57 0 43 1 0 1 1 0 8 0 amappl10 152 9 0 8 3 2 1 1 0 8 0 amappl9 144 285 0 285 1 1 0 1 0 8 0 amappl8 136 38 0 36 1 0 1 1 0 8 0 amappl7 128 125 0 112 1 0 1 1 0 8 0 amappl6 120 208 0 205 1 0 1 1 0 8 0 amappl5 112 135 0 125 1 0 1 1 0 8 0 amappl4 104 365 0 341 1 0 1 1 0 8 0 amappl3 96 10213 0 10115 4 0 4 4 0 8 0 amappl2 88 744 0 681 2 0 2 2 0 8 0 amappl1 80 15431 0 14837 15 0 15 15 0 8 0 amappl 88 13980 0 13834 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 2 0 2 2 2 0 1 0 8 0 dma256 256 9 0 9 3 2 1 1 0 8 1 dma128 128 256 0 256 2 1 1 1 0 8 1 dma64 64 7 0 7 2 2 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 72 131 0 1 3 0 3 3 0 8 0 uaddrrnd 24 1720 0 1691 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1720 0 1691 1 0 1 1 0 8 0 vmmpekpl 168 15796 0 15740 3 0 3 3 0 8 0 vmmpepl 168 113486 0 111618 109 12 97 97 0 357 2 vmsppl 480 1720 0 1691 7 2 5 5 0 8 0 rwobjpl 72 35593 0 29546 112 1 111 111 0 8 0 pdppl 4096 3447 0 3382 131 60 71 83 0 8 6 pvpl 32 16310 0 0 132 0 132 132 0 265 0 pmappl 256 1720 0 1691 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 526 0 92 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0