login: panic: pool_do_get: shmpl free list modified: page 0xfffffd806cde1000; item addr 0xfffffd806cde1d90; offset 0x40=0x67ab4a31 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 214982 35761 0 0 0 0 syz-executor *272224 35761 0 0 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a2eee) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839be1a0,2,ffff80002ec96038) at pool_do_get+0x5da pool_get(ffffffff839be1a0,2) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff9c50,ffff80002ec96290,110,ffff80002ec961e0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff9c50,ffff80002ec96290,ffff80002ec961e0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002ec96290) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ec96290) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x798525e9230, 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 0xfffffd806cde1000; item addr 0xfffffd806cde1d90; offset 0x40=0x67ab4a31 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a2eee) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839be1a0,2,ffff80002ec96038) at pool_do_get+0x5da pool_get(ffffffff839be1a0,2) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff9c50,ffff80002ec96290,110,ffff80002ec961e0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff9c50,ffff80002ec96290,ffff80002ec961e0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002ec96290) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ec96290) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x798525e9230, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002ec95e70 rbx 0xffff800029a9cdc7 rdx 0xffff80000143f8c0 rcx 0xffff8000ffff9c50 rax 0xffff800029a9bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xfc5b8a01c7849e86 r11 0xf3ef497cdfe2fdbb r12 0xffff800029a9cbc8 r13 0 r14 0 r15 0x1 rip 0xffffffff82edcdb5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002ec95e60 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=272224 pid=35761 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff7738,0xffff8000ffff9740 process=0xffff80002ec99498 user=0xffff80002ec91000, vmspace=0xfffffd806bebf900 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 23869 209469 49420 0 2 0 syz-executor 82055 92591 74647 0 2 0 syz-executor 35761 214982 82399 0 7 0 syz-executor *35761 272224 82399 0 7 0x4000000 syz-executor 93934 289176 26889 0 2 0 syz-executor 93934 191745 26889 0 3 0x4000080 fsleep syz-executor 84743 102112 36323 0 2 0 syz-executor 79368 308627 0 0 3 0x14200 bored sosplice 67847 165448 88085 0 2 0 syz-executor 67847 147488 88085 0 3 0x4000080 fsleep syz-executor 41835 111452 80991 0 2 0 syz-executor 41835 23763 80991 0 3 0x4000080 fsleep syz-executor 41835 141484 80991 0 3 0x4000080 fsleep syz-executor 88930 424198 14811 0 3 0x82 sbwait sshd-session 57787 147420 1 0 3 0x100083 ttyin getty 49420 239899 67856 0 3 0x82 nanoslp syz-executor 74647 481743 67856 0 3 0x82 nanoslp syz-executor 88085 247304 67856 0 3 0x82 nanoslp syz-executor 80991 135031 67856 0 3 0x82 nanoslp syz-executor 36323 234557 67856 0 3 0x82 nanoslp syz-executor 54439 498991 67856 0 3 0x2 biowait syz-executor 82399 106706 67856 0 3 0x82 nanoslp syz-executor 26889 218237 67856 0 3 0x82 nanoslp syz-executor 67856 474689 63635 0 3 0x82 kqread syz-executor 63635 65416 98922 0 3 0x10008a sigsusp ksh 98922 388747 35664 0 3 0x98 kqread sshd-session 35664 328492 14811 0 3 0x92 kqread sshd-session 14811 343087 1 0 3 0x88 kqread sshd 62852 21919 12251 74 3 0x1100092 bpf pflogd 12251 390808 1 0 3 0x80 sbwait pflogd 79278 93766 55093 73 3 0x1100090 kqread syslogd 55093 425647 1 0 3 0x100082 sbwait syslogd 72510 469475 1 0 3 0x100080 kqread resolvd 82485 247087 53161 77 3 0x100092 kqread dhcpleased 79124 507160 53161 77 3 0x100092 kqread dhcpleased 53161 514407 1 0 3 0x80 kqread dhcpleased 68066 382950 0 0 3 0x14200 bored smr 93967 133785 0 0 2 0x14200 zerothread 60262 271383 0 0 3 0x14200 aiodoned aiodoned 65240 334621 0 0 3 0x14200 syncer update 39970 320521 0 0 3 0x14200 cleaner cleaner 93317 393594 0 0 3 0x14200 reaper reaper 75416 430564 0 0 3 0x14200 pgdaemon pagedaemon 43807 200695 0 0 3 0x14200 bored viomb 61813 13525 0 0 3 0x40014200 acpi0 acpi0 13913 466530 0 0 3 0x40014200 idle1 47242 144792 0 0 3 0x14200 bored softnet3 59449 226885 0 0 3 0x14200 bored softnet2 14025 145046 0 0 3 0x14200 bored softnet1 26600 366365 0 0 3 0x14200 bored softnet0 66280 501391 0 0 3 0x14200 bored systqmp 29723 34424 0 0 3 0x14200 bored systq 4506 72532 0 0 3 0x14200 tmoslp softclockmp 81517 205953 0 0 3 0x40014200 tmoslp softclock 68619 224658 0 0 3 0x40014200 idle0 1 85278 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex shmpl r = 0 (0xffffffff839be1b8) #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 35761 (syz-executor) thread 0xffff8000ffff9c50 (272224) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838e3ee0) #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 (0xffffffff839be1b8) #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 54439 (syz-executor) thread 0xffff80002a369498 (498991) exclusive rrwlock inode r = 0 (0xfffffd806bb980a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1851 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8074213cd8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1851 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10196 11022K 11287K 166960K 11581 0 pcb 20 13K 14K 166960K 81 0 rtable 244 8K 8K 166960K 374 0 pf 37 18K 22K 166960K 116 0 ifaddr 43 7K 7K 166960K 45 0 ifgroup 55 2K 2K 166960K 55 0 sysctl 1 1K 1K 166960K 1 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 4K 166960K 1557 0 iov 0 0K 12K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1429 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 251 0 sigio 0 0K 0K 166960K 1 0 proc 73 103K 128K 166960K 545 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 2 0K 0K 166960K 14 0 in_multi 99 7K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 1 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 411 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 209 72K 74K 166960K 3844 0 UVM aobj 6 2K 2K 166960K 9 0 pinsyscall 44 88K 103K 166960K 1341 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 12 0K 1K 166960K 28 0 temp 40 8631K 8699K 166960K 4666 0 kqueue 14 20K 26K 166960K 40 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 39 0 36 1 0 1 1 0 8 0 rtentry 112 114 0 2 4 0 4 4 0 8 0 unpcb 144 79 0 61 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 808 33 0 27 1 0 1 1 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 376 180 0 167 5 0 5 5 0 8 3 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 2 0 2 1 0 1 1 0 8 1 nd6 136 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 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 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 24 0 0 1 0 1 1 0 8 0 pfstkey 128 24 0 0 1 0 1 1 0 8 0 pfstate 376 24 0 0 3 0 3 3 0 8 0 pfrule 1344 89 0 17 8 1 7 7 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 459 0 0 29 0 29 29 0 8 0 art_table 32 462 0 0 4 0 4 4 0 8 0 art_node 16 112 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semapl 112 7 0 1 1 0 1 1 0 8 0 shmpl 112 6 0 3 1 0 1 1 0 8 0 pool(0xffffffff839be1a0:shmpl): page inconsistency: page 0xfffffd806cde1000; 31 on list, 3 missing, 35 items per page dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1744 0 233 95 0 95 95 0 8 0 ffsino 280 1744 0 233 109 0 109 109 0 8 0 nchpl 144 2091 0 405 63 0 63 63 0 8 0 uvmvnodes 80 1879 0 0 39 0 39 39 0 8 0 vnodes 216 1879 0 0 105 0 105 105 0 8 0 namei 1024 6981 0 6981 2 0 2 2 0 8 2 percpumem 16 46 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 6985 0 6984 9 1 8 8 1 8 7 plimitpl 152 149 0 130 1 0 1 1 0 8 0 sigapl 424 553 0 502 7 0 7 7 0 8 1 futexpl 64 1744 0 1740 1 0 1 1 0 8 0 knotepl 120 302 0 0 10 0 10 10 0 8 0 kqueuepl 216 51 0 41 1 0 1 1 0 8 0 pipepl 328 118 0 89 3 0 3 3 0 8 0 fdescpl 504 534 0 502 5 0 5 5 0 8 0 filepl 152 2328 0 2100 12 0 12 12 0 8 1 lockfpl 104 39 0 37 1 0 1 1 0 8 0 lockfspl 48 21 0 19 1 0 1 1 0 8 0 sessionpl 144 24 0 14 1 0 1 1 0 8 0 pgrppl 48 36 0 18 1 0 1 1 0 8 0 ucredpl 104 242 0 229 1 0 1 1 0 8 0 zombiepl 144 502 0 502 1 0 1 1 0 8 1 processpl 1168 553 0 502 5 0 5 5 0 8 1 procpl 656 737 0 681 6 0 6 6 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 688 299 0 265 6 0 6 6 0 8 2 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 110 0 0 14 0 14 14 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 39 0 0 1 0 1 1 0 8 0 mbufpl 256 177 0 0 12 0 12 12 0 8 0 bufpl 280 2495 0 127 170 0 170 170 0 8 0 anonpl 24 107273 0 103919 25 2 23 24 0 184 0 amapchunkpl 152 11715 0 11302 22 0 22 22 0 158 3 amappl16 200 2032 0 2006 5 2 3 5 0 8 0 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 153 0 140 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 1175 0 1146 4 1 3 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 4 0 3 1 0 1 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 185 0 171 1 0 1 1 0 8 0 amappl6 120 178 0 174 1 0 1 1 0 8 0 amappl5 112 138 0 129 1 0 1 1 0 8 0 amappl4 104 324 0 305 1 0 1 1 0 8 0 amappl3 96 1997 0 1901 4 0 4 4 0 8 1 amappl2 88 642 0 574 2 0 2 2 0 8 0 amappl1 80 8303 0 7654 14 0 14 14 0 8 0 amappl 88 3452 0 3305 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 3 1 0 1 1 0 8 0 uaddrrnd 24 534 0 502 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 534 0 502 1 0 1 1 0 8 0 vmmpekpl 168 6069 0 6031 2 0 2 2 0 8 0 vmmpepl 168 39210 0 37268 90 0 90 90 0 357 2 vmsppl 456 533 0 502 5 0 5 5 0 8 0 rwobjpl 64 15835 0 12959 47 0 47 47 0 8 0 pdppl 4096 1076 0 1004 98 24 74 86 0 8 2 pvpl 32 11003 0 0 91 2 89 89 0 265 0 pmappl 248 533 0 502 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 276 0 26 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83791ff0) 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(ffffffff838e3cd8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838e3cd8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003c522120,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7d4debaf4ac0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83791ff0) 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(ffffffff838e3cd8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838e3cd8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003c522120,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7d4debaf4ac0, count: -6 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(ffffffff833a2eee) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839be1a0,2,ffff80002ec96038) at pool_do_get+0x5da pool_get(ffffffff839be1a0,2) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff9c50,ffff80002ec96290,110,ffff80002ec961e0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff9c50,ffff80002ec96290,ffff80002ec961e0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002ec96290) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ec96290) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x798525e9230, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a2eee) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839be1a0,2,ffff80002ec96038) at pool_do_get+0x5da pool_get(ffffffff839be1a0,2) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff9c50,ffff80002ec96290,110,ffff80002ec961e0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff9c50,ffff80002ec96290,ffff80002ec961e0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002ec96290) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ec96290) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x798525e9230, count: -8