panic: pool_do_get: shmpl free list modified: page 0xfffffd806b650000; item addr 0xfffffd806b650a80; offset 0x40=0x68b5774f Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 38972 4404 32767 0x10 0 0 syz-executor *156246 1967 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83365779) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8393da80,1,ffff80003c485818) at pool_do_get+0x5df pool_get(ffffffff8393da80,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c459250,ffff80003c485a70,0,ffff80003c4859c0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c459250,ffff80003c485a70,ffff80003c4859c0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c485a70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c485a70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb40b5f59310, count: 7 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: pool_do_get: shmpl free list modified: page 0xfffffd806b650000; item addr 0xfffffd806b650a80; offset 0x40=0x68b5774f ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83365779) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8393da80,1,ffff80003c485818) at pool_do_get+0x5df pool_get(ffffffff8393da80,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c459250,ffff80003c485a70,0,ffff80003c4859c0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c459250,ffff80003c485a70,ffff80003c4859c0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c485a70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c485a70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb40b5f59310, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c485640 rbx 0xffff8000299eeddf rdx 0 rcx 0xffff80003c459250 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc035945bdeef4f97 r11 0xcaa7a89c4d9f695d r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff823e1fb5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c485630 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=156246 pid=1967 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c458028,0xffff80003c458800 process=0xffff80002a371360 user=0xffff80003c480000, vmspace=0xfffffd806bd96b90 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 56350 207645 2879 32767 2 0x10 syz-executor 20101 334104 15807 32767 2 0x10 syz-executor 20101 102831 15807 32767 3 0x4000090 netacc syz-executor 52675 61287 60247 32767 2 0x10 syz-executor 52675 71671 60247 32767 3 0x4000010 biowait syz-executor 4404 38972 3600 32767 7 0x10 syz-executor 4404 473238 3600 32767 3 0x4000090 fsleep syz-executor 32146 148689 94727 32767 2 0x10 syz-executor 32146 389416 94727 32767 3 0x4000090 fsleep syz-executor 1967 282238 77508 32767 2 0x10 syz-executor * 1967 156246 77508 32767 7 0x4000010 syz-executor 1967 57356 77508 32767 3 0x4000090 fsleep syz-executor 10374 99636 51572 32767 2 0x10 syz-executor 10374 289044 51572 32767 3 0x4000090 sbwait syz-executor 60247 93863 20 32767 3 0x90 nanoslp syz-executor 77508 418359 69880 32767 3 0x90 nanoslp syz-executor 51572 286685 91239 32767 3 0x90 nanoslp syz-executor 2879 357901 20227 32767 2 0x10 syz-executor 15807 479145 30022 32767 3 0x90 nanoslp syz-executor 94727 141402 19479 32767 3 0x90 nanoslp syz-executor 3600 168972 50214 32767 3 0x90 nanoslp syz-executor 20227 214524 3116 0 3 0x82 wait syz-executor 69880 61166 3116 0 3 0x82 wait syz-executor 30022 178948 3116 0 3 0x82 wait syz-executor 19479 317576 3116 0 3 0x82 wait syz-executor 91239 63284 3116 0 3 0x82 wait syz-executor 50214 99261 3116 0 3 0x82 wait syz-executor 20 304070 3116 0 3 0x82 wait syz-executor 3116 378747 25232 0 3 0x82 nanoslp syz-executor 25232 493675 68180 0 3 0x10008a sigsusp ksh 68180 107972 47588 0 3 0x98 kqread sshd-session 47588 452007 50930 0 3 0x92 kqread sshd-session 57735 12672 1 0 3 0x100083 ttyin getty 50930 404038 1 0 3 0x88 kqread sshd 451 188688 14860 73 3 0x1100090 kqread syslogd 14860 84631 1 0 3 0x100082 sbwait syslogd 94693 196196 1 0 3 0x100080 kqread resolvd 52527 458298 4276 77 3 0x100092 kqread dhcpleased 93648 471591 4276 77 3 0x100092 kqread dhcpleased 4276 288578 1 0 3 0x80 kqread dhcpleased 46277 211640 0 0 3 0x14200 bored smr 18148 468957 0 0 2 0x14200 zerothread 54437 496878 0 0 3 0x14200 aiodoned aiodoned 13710 412566 0 0 3 0x14200 syncer update 9584 497114 0 0 3 0x14200 cleaner cleaner 27488 234344 0 0 3 0x14200 reaper reaper 41500 459419 0 0 3 0x14200 pgdaemon pagedaemon 92938 74553 0 0 3 0x14200 bored viomb 47234 431062 0 0 3 0x40014200 acpi0 acpi0 92710 141366 0 0 3 0x40014200 idle1 63854 499099 0 0 3 0x14200 bored softnet7 95982 358967 0 0 3 0x14200 bored softnet6 34309 444039 0 0 3 0x14200 bored softnet5 29471 397625 0 0 3 0x14200 bored softnet4 38542 173816 0 0 3 0x14200 bored softnet3 12892 5617 0 0 3 0x14200 bored softnet2 92106 447962 0 0 3 0x14200 bored softnet1 20995 310600 0 0 3 0x14200 bored softnet0 69763 316894 0 0 3 0x14200 bored systqmp 6563 393063 0 0 3 0x14200 bored systq 61694 388779 0 0 3 0x14200 tmoslp softclockmp 57929 464855 0 0 3 0x40014200 tmoslp softclock 1231 252701 0 0 3 0x40014200 idle0 1 389196 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex shmpl r = 0 (0xffffffff8393da98) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pool_get+0x124 sys/kern/subr_pool.c:581 #4 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #5 sys_shmget+0x195 sys/kern/sysv_shm.c:482 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #7 Xsyscall+0x128 Process 52675 (syz-executor) thread 0xffff80003c459cb0 (71671) exclusive rrwlock inode r = 0 (0xfffffd806bfc8da0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 #10 vn_open+0x34d sys/kern/vfs_vnops.c:116 #11 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b93c450) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 vn_open+0x1f1 sys/kern/vfs_vnops.c:107 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #10 Xsyscall+0x128 Process 1967 (syz-executor) thread 0xffff80003c459250 (156246) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839959b8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:746 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff8393da98) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pool_get+0x124 sys/kern/subr_pool.c:581 #4 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #5 sys_shmget+0x195 sys/kern/sysv_shm.c:482 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10190 10954K 10968K 166960K 11271 0 pcb 17 12K 12K 166960K 17 0 rtable 189 5K 6K 166960K 262 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 32 0 iov 0 0K 12K 166960K 5 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1434 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 10 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 23 85K 129K 166960K 290 0 sigio 0 0K 0K 166960K 8 0 proc 58 99K 163K 166960K 486 0 subproc 63 3K 4K 166960K 144 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 33 0 in_multi 88 6K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 368 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 228 152K 170K 166960K 3885 0 UVM aobj 7 2K 3K 166960K 9 0 pinsyscall 44 88K 112K 166960K 1307 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 7 0 NDP 10 0K 2K 166960K 27 0 temp 33 8642K 8707K 166960K 4325 0 kqueue 13 20K 28K 166960K 49 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 44 0 41 1 0 1 1 0 8 0 rtentry 176 97 0 11 5 0 5 5 0 8 0 unpcb 144 131 0 113 2 0 2 2 0 8 1 syncache 336 8 0 8 1 0 1 1 0 8 1 tcpqe 32 3 0 3 1 0 1 1 0 8 1 tcpcb 736 66 0 55 2 0 2 2 0 8 1 arp 128 11 0 1 1 0 1 1 0 8 0 inpcb 328 235 0 185 5 0 5 5 0 8 0 nd6 144 17 0 3 1 0 1 1 0 8 0 kcovpl 48 16 0 9 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 438 0 43 28 0 28 28 0 8 1 art_table 40 439 0 43 5 0 5 5 0 8 0 art_node 32 97 0 20 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 6 0 2 1 0 1 1 0 8 0 pool(0xffffffff8393da80:shmpl): page inconsistency: page 0xfffffd806b650000; 30 on list, 4 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1727 0 205 96 0 96 96 0 8 0 ffsino 296 1727 0 205 118 0 118 118 0 8 0 nchpl 144 2089 0 403 63 0 63 63 0 8 0 uvmvnodes 80 1880 0 0 39 0 39 39 0 8 0 vnodes 216 1880 0 0 105 0 105 105 0 8 0 namei 1024 6368 0 6367 1 0 1 1 0 8 0 percpumem 16 49 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 7304 0 7303 3 2 1 2 1 8 0 plimitpl 152 70 0 47 2 0 2 2 0 8 1 sigapl 424 553 0 496 8 0 8 8 0 8 1 knotepl 120 311 0 0 10 0 10 10 0 8 0 kqueuepl 224 59 0 50 1 0 1 1 0 8 0 pipepl 344 135 0 108 3 0 3 3 0 8 0 fdescpl 528 531 0 496 4 0 4 4 0 8 1 filepl 160 2204 0 1958 11 0 11 11 0 8 0 lockfpl 104 39 0 37 1 0 1 1 0 8 0 lockfspl 48 15 0 13 1 0 1 1 0 8 0 sessionpl 144 34 0 19 1 0 1 1 0 8 0 pgrppl 48 52 0 30 1 0 1 1 0 8 0 ucredpl 104 238 0 220 1 0 1 1 0 8 0 zombiepl 144 496 0 496 1 0 1 1 0 8 1 processpl 1232 553 0 496 7 1 6 6 0 8 1 procpl 664 749 0 685 7 0 7 7 0 8 1 sockpl 752 411 0 340 8 0 8 8 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 195 0 0 13 0 13 13 0 8 0 bufpl 280 3043 0 116 210 0 210 210 0 8 0 anonpl 32 5342 0 0 44 0 44 44 0 246 0 amapchunkpl 152 12041 0 11468 31 3 28 28 0 158 5 amappl16 200 2070 0 2052 5 3 2 5 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 117 0 106 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1126 0 1092 2 0 2 2 0 8 0 amappl11 160 48 0 38 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 257 0 257 1 1 0 1 0 8 0 amappl8 136 18 0 17 1 0 1 1 0 8 0 amappl7 128 106 0 96 1 0 1 1 0 8 0 amappl6 120 183 0 180 1 0 1 1 0 8 0 amappl5 112 122 0 115 1 0 1 1 0 8 0 amappl4 104 269 0 253 1 0 1 1 0 8 0 amappl3 96 1840 0 1750 3 0 3 3 0 8 0 amappl2 88 779 0 705 2 0 2 2 0 8 0 amappl1 80 9467 0 8907 14 0 14 14 0 8 0 amappl 88 3229 0 3065 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 128 253 0 253 1 1 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 8 0 2 1 0 1 1 0 8 0 uaddrrnd 24 531 0 496 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 531 0 496 1 0 1 1 0 8 0 vmmpekpl 168 6311 0 6270 3 0 3 3 0 8 0 vmmpepl 168 41050 0 39054 100 0 100 100 0 357 8 vmsppl 488 530 0 496 7 1 6 6 0 8 1 rwobjpl 80 16097 0 13419 57 0 57 57 0 8 0 pdppl 4096 1070 0 992 114 30 84 100 0 8 6 pvpl 32 12579 0 0 102 0 102 102 0 265 0 pmappl 256 530 0 496 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 286 0 33 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f5ff0) 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(ffffffff839957b0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839957b0) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80002a36fb00,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff839957b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839957b0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd806bd963f0,fa885032000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80002a36fe90,fa885032000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a36fe90) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7af82e5a8f30, count: 4 ddb{0}> trace x86_ipi_db(ffffffff837f5ff0) 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(ffffffff839957b0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839957b0) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80002a36fb00,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff839957b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839957b0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd806bd963f0,fa885032000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80002a36fe90,fa885032000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a36fe90) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7af82e5a8f30, count: -11 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83365779) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8393da80,1,ffff80003c485818) at pool_do_get+0x5df pool_get(ffffffff8393da80,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c459250,ffff80003c485a70,0,ffff80003c4859c0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c459250,ffff80003c485a70,ffff80003c4859c0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c485a70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c485a70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb40b5f59310, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83365779) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8393da80,1,ffff80003c485818) at pool_do_get+0x5df pool_get(ffffffff8393da80,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c459250,ffff80003c485a70,0,ffff80003c4859c0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c459250,ffff80003c485a70,ffff80003c4859c0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c485a70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c485a70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb40b5f59310, count: -8