panic: pool_do_get: shmpl free list modified: page 0xfffffd806ba32000; item addr 0xfffffd806ba32a10; offset 0x40=0x67a67d39 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *499149 99273 32767 0x10 0x4000000 1K syz-executor 301876 76854 32767 0x10 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a4737) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838cfbb8,1,ffff80003c588c78) at pool_do_get+0x5da pool_get(ffffffff838cfbb8,1) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff6530,ffff80003c588ed0,151,ffff80003c588e20) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff6530,ffff80003c588ed0,ffff80003c588e20) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c588ed0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c588ed0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x81bfeceb640, 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 0xfffffd806ba32000; item addr 0xfffffd806ba32a10; offset 0x40=0x67a67d39 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a4737) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838cfbb8,1,ffff80003c588c78) at pool_do_get+0x5da pool_get(ffffffff838cfbb8,1) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff6530,ffff80003c588ed0,151,ffff80003c588e20) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff6530,ffff80003c588ed0,ffff80003c588e20) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c588ed0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c588ed0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x81bfeceb640, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c588ab0 rbx 0xffff800029aacdc7 rdx 0 rcx 0xffff8000ffff6530 rax 0xffff800029aabff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xff15ffd5734bc6f7 r11 0xa6239654aed0ecf r12 0xffff800029aacbc8 r13 0 r14 0 r15 0x1 rip 0xffffffff82b5c385 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c588aa0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=499149 pid=99273 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=73, usrpri=73, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c547980,0xffffffff838a3d58 process=0xffff80003c4fddd0 user=0xffff80003c583000, vmspace=0xfffffd806bfde580 estcpu=23, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 99273 275276 76730 32767 2 0x10 syz-executor *99273 499149 76730 32767 7 0x4000010 syz-executor 69700 407076 61553 32767 3 0x90 nanoslp syz-executor 69700 476607 61553 32767 3 0x4000090 fifow syz-executor 69700 226762 61553 32767 3 0x4000090 fsleep syz-executor 69700 183681 61553 32767 3 0x4000090 fsleep syz-executor 43564 421958 23682 32767 3 0x90 nanoslp syz-executor 43564 287337 23682 32767 3 0x4000090 kqpoll syz-executor 43564 287979 23682 32767 3 0x4000090 sbwait syz-executor 43564 408023 23682 32767 3 0x4000090 fsleep syz-executor 88438 121429 29663 32767 3 0x90 nanoslp syz-executor 88438 506539 29663 32767 3 0x4000090 lockf syz-executor 88438 143831 29663 32767 3 0x4000090 lockf syz-executor 88438 515619 29663 32767 3 0x4000090 fsleep syz-executor 70205 178501 89133 32767 3 0x90 nanoslp syz-executor 70205 80290 89133 32767 3 0x4000090 kqpoll syz-executor 70205 363178 89133 32767 3 0x4000090 fsleep syz-executor 56693 184863 29641 32767 3 0x90 nanoslp syz-executor 56693 289582 29641 32767 3 0x4000090 fsleep syz-executor 56693 124907 29641 32767 3 0x4000090 kqread syz-executor 56693 477445 29641 32767 3 0x4000090 fsleep syz-executor 13864 506255 1467 32767 3 0x90 nanoslp syz-executor 13864 372587 1467 32767 3 0x4000090 lockf syz-executor 13864 201509 1467 32767 3 0x4000090 fsleep syz-executor 21514 82124 46664 0 3 0x82 sbwait sshd-session 1467 167145 70693 32767 3 0x90 nanoslp syz-executor 23682 470349 39343 32767 3 0x90 nanoslp syz-executor 29641 357121 89631 32767 3 0x90 nanoslp syz-executor 89133 310213 96569 32767 3 0x90 nanoslp syz-executor 76730 178001 81522 32767 3 0x90 nanoslp syz-executor 61553 85291 65126 32767 3 0x90 nanoslp syz-executor 76854 301876 36485 32767 7 0x10 syz-executor 29663 163634 29932 32767 3 0x90 nanoslp syz-executor 96569 446041 97052 0 3 0x82 wait syz-executor 65126 286853 97052 0 3 0x82 wait syz-executor 81522 508551 97052 0 3 0x82 wait syz-executor 89631 141790 97052 0 3 0x82 wait syz-executor 70693 14868 97052 0 3 0x82 wait syz-executor 29932 197111 97052 0 3 0x82 wait syz-executor 36485 65270 97052 0 3 0x82 wait syz-executor 39343 28791 97052 0 3 0x82 wait syz-executor 97052 363034 89504 0 3 0x82 kqread syz-executor 89504 486696 21486 0 3 0x10008a sigsusp ksh 21486 64436 72764 0 3 0x98 kqread sshd-session 72764 343567 46664 0 3 0x92 kqread sshd-session 48085 36146 1 0 3 0x100083 ttyin getty 46664 119998 1 0 3 0x88 kqread sshd 47799 195596 1210 73 3 0x1100090 kqread syslogd 1210 164563 1 0 3 0x100082 sbwait syslogd 93136 353371 1 0 3 0x100080 kqread resolvd 33129 153985 73100 77 3 0x100092 kqread dhcpleased 47931 431117 73100 77 3 0x100092 kqread dhcpleased 73100 312565 1 0 3 0x80 kqread dhcpleased 33745 510351 0 0 3 0x14200 bored smr 6731 85452 0 0 2 0x14200 zerothread 76266 163280 0 0 3 0x14200 aiodoned aiodoned 6582 359386 0 0 3 0x14200 syncer update 92801 190937 0 0 3 0x14200 cleaner cleaner 75511 521025 0 0 3 0x14200 reaper reaper 19863 51086 0 0 3 0x14200 pgdaemon pagedaemon 58293 148850 0 0 3 0x14200 bored viomb 58704 13579 0 0 3 0x40014200 acpi0 acpi0 92952 167197 0 0 3 0x40014200 idle1 2980 29492 0 0 3 0x14200 bored softnet3 81212 27871 0 0 3 0x14200 bored softnet2 43353 30614 0 0 3 0x14200 bored softnet1 77133 252075 0 0 3 0x14200 bored softnet0 65730 345906 0 0 3 0x14200 bored systqmp 7025 323225 0 0 3 0x14200 bored systq 70841 448507 0 0 3 0x14200 tmoslp softclockmp 65256 510323 0 0 3 0x40014200 tmoslp softclock 45995 355523 0 0 3 0x40014200 idle0 1 198466 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 (0xffffffff838cfbd0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x10b sys/kern/subr_pool.c:583 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #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 Process 99273 (syz-executor) thread 0xffff8000ffff6530 (499149) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839b39d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff838cfbd0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x10b sys/kern/subr_pool.c:583 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #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 10187 10954K 10966K 166960K 11266 0 pcb 17 12K 12K 166960K 17 0 rtable 236 6K 6K 166960K 354 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 1K 166960K 1 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 8K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1333 84K 84K 166960K 1354 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 25 93K 117K 166960K 212 0 sigio 0 0K 0K 166960K 3 0 proc 58 79K 103K 166960K 486 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 22 0 in_multi 99 7K 7K 166960K 108 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 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 343 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 274 76K 88K 166960K 3220 0 UVM aobj 7 2K 2K 166960K 9 0 pinsyscall 48 96K 109K 166960K 1212 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 3 0 NDP 13 0K 2K 166960K 27 0 temp 35 8630K 8694K 166960K 3898 0 kqueue 16 26K 30K 166960K 35 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 43 0 40 1 0 1 1 0 8 0 rtentry 112 112 0 1 4 0 4 4 0 8 0 unpcb 144 82 0 61 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 808 28 0 22 2 0 2 2 0 8 1 arp 120 18 0 0 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 0 1 0 1 1 0 8 0 inpcb 376 109 0 98 2 0 2 2 0 8 0 nd6 136 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 455 0 0 29 0 29 29 0 8 0 art_table 32 456 0 0 4 0 4 4 0 8 0 art_node 16 111 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 3 0 1 1 0 1 1 0 8 0 shmpl 112 6 0 2 1 0 1 1 0 8 0 pool(0xffffffff838cfbb8:shmpl): page inconsistency: page 0xfffffd806ba32000; 30 on list, 4 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1639 0 136 95 0 95 95 0 8 0 ffsino 280 1639 0 136 108 0 108 108 0 8 0 nchpl 144 1918 0 239 63 0 63 63 0 8 0 uvmvnodes 80 1720 0 0 36 0 36 36 0 8 0 vnodes 216 1720 0 0 96 0 96 96 0 8 0 namei 1024 5677 0 5677 1 0 1 1 0 8 1 percpumem 16 46 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 6219 0 6219 4 1 3 3 1 8 3 plimitpl 152 44 0 19 2 0 2 2 0 8 0 sigapl 424 484 0 428 7 0 7 7 0 8 0 futexpl 64 1085 0 1077 1 0 1 1 0 8 0 knotepl 120 322 0 0 10 0 10 10 0 8 0 kqueuepl 216 75 0 60 3 0 3 3 0 8 2 pipepl 328 110 0 81 3 0 3 3 0 8 0 fdescpl 504 466 0 428 7 1 6 6 0 8 0 filepl 152 1730 0 1495 10 0 10 10 0 8 0 lockfpl 104 42 0 35 1 0 1 1 0 8 0 lockfspl 48 13 0 9 1 0 1 1 0 8 0 sessionpl 144 22 0 5 1 0 1 1 0 8 0 pgrppl 48 33 0 7 1 0 1 1 0 8 0 ucredpl 104 180 0 161 1 0 1 1 0 8 0 zombiepl 144 428 0 428 1 0 1 1 0 8 1 processpl 1168 484 0 428 5 0 5 5 0 8 0 procpl 648 622 0 549 7 0 7 7 0 8 0 sockpl 688 237 0 202 4 0 4 4 0 8 0 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 191 0 0 12 0 12 12 0 8 0 bufpl 280 2395 0 124 163 0 163 163 0 8 0 anonpl 24 101908 0 96068 36 0 36 36 0 184 0 amapchunkpl 152 10246 0 9475 32 0 32 32 0 158 0 amappl16 200 1897 0 1858 5 0 5 5 0 8 2 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 99 0 88 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 0 1 1 0 8 1 amappl12 168 1062 0 1024 2 0 2 2 0 8 0 amappl11 160 46 0 36 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 0 1 1 0 8 1 amappl9 144 244 0 244 1 0 1 1 0 8 1 amappl8 136 20 0 19 1 0 1 1 0 8 0 amappl7 128 115 0 104 1 0 1 1 0 8 0 amappl6 120 172 0 168 1 0 1 1 0 8 0 amappl5 112 131 0 125 1 0 1 1 0 8 0 amappl4 104 280 0 266 1 0 1 1 0 8 0 amappl3 96 1662 0 1513 4 0 4 4 0 8 0 amappl2 88 605 0 544 2 0 2 2 0 8 0 amappl1 80 7742 0 7113 14 0 14 14 0 8 0 amappl 88 2881 0 2661 6 0 6 6 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 24 466 0 428 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 466 0 428 1 0 1 1 0 8 0 vmmpekpl 168 5354 0 5317 2 0 2 2 0 8 0 vmmpepl 168 34729 0 32554 98 0 98 98 0 357 0 vmsppl 456 465 0 428 7 1 6 6 0 8 0 rwobjpl 64 14497 0 11775 45 0 45 45 0 8 0 pdppl 4096 940 0 856 104 14 90 94 0 8 6 pvpl 32 15099 0 0 122 0 122 122 0 265 0 pmappl 248 465 0 428 4 1 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 283 0 17 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837b0ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff839b37c8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839b37c8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff839b37c8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839b37c8) at __mp_lock+0x199 sys/kern/kern_lock.c:144 vn_closefile(fffffd8069baaef0,ffff8000ffff8a38) at vn_closefile+0x41 sys/kern/vfs_vnops.c:608 fdrop(fffffd8069baaef0,ffff8000ffff8a38) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd8069baaef0,ffff8000ffff8a38) at closef+0x192 sys/kern/kern_descrip.c:1249 syscall(ffff80002f09ebf0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002f09ebf0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d520ecc3030, count: 3 ddb{0}> trace x86_ipi_db(ffffffff837b0ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff839b37c8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839b37c8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff839b37c8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839b37c8) at __mp_lock+0x199 sys/kern/kern_lock.c:144 vn_closefile(fffffd8069baaef0,ffff8000ffff8a38) at vn_closefile+0x41 sys/kern/vfs_vnops.c:608 fdrop(fffffd8069baaef0,ffff8000ffff8a38) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd8069baaef0,ffff8000ffff8a38) at closef+0x192 sys/kern/kern_descrip.c:1249 syscall(ffff80002f09ebf0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002f09ebf0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d520ecc3030, count: -12 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:437 panic(ffffffff833a4737) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838cfbb8,1,ffff80003c588c78) at pool_do_get+0x5da pool_get(ffffffff838cfbb8,1) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff6530,ffff80003c588ed0,151,ffff80003c588e20) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff6530,ffff80003c588ed0,ffff80003c588e20) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c588ed0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c588ed0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x81bfeceb640, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a4737) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838cfbb8,1,ffff80003c588c78) at pool_do_get+0x5da pool_get(ffffffff838cfbb8,1) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff6530,ffff80003c588ed0,151,ffff80003c588e20) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff6530,ffff80003c588ed0,ffff80003c588e20) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c588ed0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c588ed0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x81bfeceb640, count: -8