panic: pool_do_get: shmpl free list modified: page 0xfffffd806c8c9000; item addr 0xfffffd806c8c9d20; offset 0x40=0x691cb9bf Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 387438 56521 32767 0x10 0 0 syz-executor *427987 56521 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83395a3b) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8392a470,1,ffff800031bde328) at pool_do_get+0x5df pool_get(ffffffff8392a470,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000337fefb8,ffff800031bde580,41,ffff800031bde4d0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000337fefb8,ffff800031bde580,ffff800031bde4d0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800031bde580) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031bde580) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd298f6236f0, 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 0xfffffd806c8c9000; item addr 0xfffffd806c8c9d20; offset 0x40=0x691cb9bf ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83395a3b) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8392a470,1,ffff800031bde328) at pool_do_get+0x5df pool_get(ffffffff8392a470,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000337fefb8,ffff800031bde580,41,ffff800031bde4d0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000337fefb8,ffff800031bde580,ffff800031bde4d0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800031bde580) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031bde580) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd298f6236f0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800031bde150 rbx 0xffff8000299eee07 rdx 0xffff800001469440 rcx 0xffff8000337fefb8 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb0f37d42942201e6 r11 0x67c448af0cf31ae1 r12 0xffff8000299eec08 r13 0 r14 0 r15 0x1 rip 0xffffffff818decf5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800031bde140 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=427987 pid=56521 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=67, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000337ffcb0,0xffffffff83927c78 process=0xffff80003c41e6a0 user=0xffff800031bd9000, vmspace=0xfffffd806cdfdd70 estcpu=17, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 56521 387438 71084 32767 7 0x10 syz-executor *56521 427987 71084 32767 7 0x4000010 syz-executor 88871 412846 61929 32767 2 0x10 syz-executor 88871 179073 61929 32767 3 0x4000090 kqpoll syz-executor 37817 229701 82927 32767 3 0x90 nanoslp syz-executor 37817 126199 82927 32767 3 0x4000090 lockf syz-executor 37817 112123 82927 32767 3 0x4000090 fsleep syz-executor 37817 247930 82927 32767 3 0x4000090 fsleep syz-executor 82895 84547 7424 32767 3 0x90 nanoslp syz-executor 82895 303926 7424 32767 3 0x4000090 kqread syz-executor 82895 14772 7424 32767 3 0x4000090 fsleep syz-executor 47466 354704 36917 32767 3 0x90 nanoslp syz-executor 47466 478147 36917 32767 3 0x4000090 lockf syz-executor 47466 123611 36917 32767 3 0x4000090 fsleep syz-executor 79047 481747 49250 32767 3 0x90 nanoslp syz-executor 79047 163786 49250 32767 3 0x4000090 netacc syz-executor 79047 50824 49250 32767 3 0x4000090 fsleep syz-executor 49250 68972 81740 32767 3 0x90 nanoslp syz-executor 53830 378011 90445 32767 3 0x90 nanoslp syz-executor 61929 521768 8605 32767 3 0x90 nanoslp syz-executor 36917 33561 97817 32767 3 0x90 nanoslp syz-executor 71084 30168 18607 32767 3 0x90 nanoslp syz-executor 7424 253697 16887 32767 3 0x90 nanoslp syz-executor 82927 36262 38090 32767 3 0x90 nanoslp syz-executor 44077 124358 78473 32767 3 0x10 biowait syz-executor 8605 268440 28985 0 3 0x82 wait syz-executor 97817 77380 28985 0 3 0x82 wait syz-executor 81740 200723 28985 0 3 0x82 wait syz-executor 90445 502606 28985 0 3 0x82 wait syz-executor 18607 312755 28985 0 3 0x82 wait syz-executor 38090 473191 28985 0 3 0x82 wait syz-executor 16887 15546 28985 0 3 0x82 wait syz-executor 78473 152422 28985 0 3 0x82 wait syz-executor 28985 364753 25737 0 3 0x82 kqread syz-executor 25737 279369 4335 0 3 0x10008a sigsusp ksh 4335 114244 90508 0 3 0x98 kqread sshd-session 90508 320233 48102 0 3 0x92 kqread sshd-session 7184 255950 1 0 3 0x100083 ttyin getty 48102 37062 1 0 3 0x88 kqread sshd 49478 369742 46598 73 3 0x1100090 kqread syslogd 46598 123692 1 0 3 0x100082 sbwait syslogd 29889 215044 1 0 3 0x100080 kqread resolvd 84957 401420 73551 77 3 0x100092 kqread dhcpleased 77885 221843 73551 77 3 0x100092 kqread dhcpleased 73551 61193 1 0 3 0x80 kqread dhcpleased 16532 127048 0 0 3 0x14200 bored smr 74839 449489 0 0 3 0x14200 pgzero zerothread 22182 34599 0 0 3 0x14200 aiodoned aiodoned 1797 398822 0 0 3 0x14200 syncer update 40684 501256 0 0 3 0x14200 cleaner cleaner 86386 226262 0 0 3 0x14200 reaper reaper 50686 201129 0 0 3 0x14200 pgdaemon pagedaemon 83559 429667 0 0 3 0x14200 bored viomb 63815 236839 0 0 3 0x40014200 acpi0 acpi0 49148 18411 0 0 3 0x40014200 idle1 67479 145428 0 0 3 0x14200 bored softnet1 36556 278821 0 0 3 0x14200 bored softnet0 19574 427969 0 0 3 0x14200 bored systqmp 22404 497304 0 0 3 0x14200 bored systq 35247 277904 0 0 3 0x14200 tmoslp softclockmp 5543 88344 0 0 3 0x40014200 tmoslp softclock 52296 212610 0 0 3 0x40014200 idle0 1 31394 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 (0xffffffff8392a488) #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:765 #7 Xsyscall+0x128 Process 56521 (syz-executor) thread 0xffff8000337fefb8 (427987) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83942fe8) #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:765 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff8392a488) #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:765 #7 Xsyscall+0x128 Process 44077 (syz-executor) thread 0xffff8000fffeea78 (124358) exclusive rrwlock inode r = 0 (0xfffffd806cc6e0e0) #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_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806dbe3318) #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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 10957K 10973K 166960K 11280 0 pcb 17 12K 12K 166960K 17 0 rtable 241 6K 7K 166960K 353 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 2 1K 9K 166960K 6 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 29 0 iov 0 0K 12K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1360 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 8 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 121K 166960K 209 0 sigio 0 0K 0K 166960K 1 0 proc 62 131K 163K 166960K 485 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 9 0 in_multi 99 7K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 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 355 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 184K 221K 166960K 3576 0 UVM aobj 3 2K 3K 166960K 4 0 pinsyscall 46 92K 108K 166960K 1257 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 5 0 NDP 11 0K 2K 166960K 27 0 temp 39 8670K 8734K 166960K 4039 0 kqueue 16 22K 22K 166960K 34 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 41 0 38 1 0 1 1 0 8 0 rtentry 176 113 0 1 6 0 6 6 0 8 0 unpcb 144 130 0 111 4 0 4 4 0 8 3 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 40 0 33 1 0 1 1 0 8 0 arp 136 19 0 0 1 0 1 1 0 8 0 inpcb 328 127 0 112 2 0 2 2 0 8 0 nd6 152 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 256 467 0 0 30 0 30 30 0 8 0 art_table 40 468 0 0 5 0 5 5 0 8 0 art_node 32 113 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 5 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 1 1 0 1 1 0 8 1 pool(0xffffffff8392a470:shmpl): page inconsistency: page 0xfffffd806c8c9000; 34 on list, 0 missing, 35 items per page dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1647 0 140 95 0 95 95 0 8 0 ffsino 296 1647 0 140 117 0 117 117 0 8 0 nchpl 144 1928 0 237 63 0 63 63 0 8 0 vnodes 216 1728 0 0 96 0 96 96 0 8 0 namei 1024 5750 0 5749 1 0 1 1 0 8 0 percpumem 16 49 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 6186 0 6185 3 1 2 2 1 8 1 plimitpl 152 42 0 16 2 0 2 2 0 8 1 sigapl 424 491 0 438 7 0 7 7 0 8 0 knotepl 120 287 0 0 9 0 9 9 0 8 0 kqueuepl 224 38 0 23 1 0 1 1 0 8 0 pipepl 344 111 0 83 3 0 3 3 0 8 0 fdescpl 528 475 0 438 3 0 3 3 0 8 0 filepl 160 1819 0 1589 13 0 13 13 0 8 3 lockfpl 104 156 0 146 2 0 2 2 0 8 1 lockfspl 48 13 0 7 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 32 0 8 1 0 1 1 0 8 0 ucredpl 104 153 0 134 1 0 1 1 0 8 0 zombiepl 144 439 0 438 1 0 1 1 0 8 0 processpl 1232 491 0 438 5 0 5 5 0 8 0 procpl 664 611 0 547 7 0 7 7 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 752 298 0 261 11 0 11 11 0 8 7 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 178 0 0 12 0 12 12 0 8 0 bufpl 280 2339 0 118 159 0 159 159 0 8 0 anonpl 32 7469 0 0 61 0 61 61 0 246 0 amapchunkpl 152 11212 0 10632 38 0 38 38 0 158 14 amappl16 200 2530 0 2511 14 0 14 14 0 8 12 amappl15 192 22 0 22 1 0 1 1 0 8 1 amappl14 184 6 0 5 1 0 1 1 0 8 0 amappl13 176 397 0 396 1 0 1 1 0 8 0 amappl12 168 828 0 782 3 0 3 3 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 62 0 52 1 0 1 1 0 8 0 amappl9 144 252 0 252 1 0 1 1 0 8 1 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 81 0 80 1 0 1 1 0 8 0 amappl6 120 254 0 243 1 0 1 1 0 8 0 amappl5 112 141 0 134 1 0 1 1 0 8 0 amappl4 104 371 0 349 1 0 1 1 0 8 0 amappl3 96 1603 0 1496 3 0 3 3 0 8 0 amappl2 88 593 0 517 2 0 2 2 0 8 0 amappl1 80 9420 0 8854 14 0 14 14 0 8 0 amappl 88 2878 0 2676 5 0 5 5 0 92 0 uvmvnodes 80 106 0 0 3 0 3 3 0 8 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 3 0 1 1 0 1 1 0 8 0 uaddrrnd 24 475 0 438 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 475 0 438 1 0 1 1 0 8 0 vmmpekpl 168 5651 0 5617 2 0 2 2 0 8 0 vmmpepl 168 39260 0 37201 103 0 103 103 0 357 5 vmsppl 488 474 0 438 6 0 6 6 0 8 0 rwobjpl 80 14669 0 13717 25 0 25 25 0 8 2 pdppl 4096 958 0 876 108 18 90 96 0 8 8 pvpl 32 14582 0 0 118 0 118 118 0 265 0 pmappl 256 474 0 438 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 279 0 20 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83826ff0) 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(ffffffff83942de0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83942de0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002fbccd40,ffff80000006b400) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x72cc72bad990, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83826ff0) 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(ffffffff83942de0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83942de0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002fbccd40,ffff80000006b400) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x72cc72bad990, 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:438 panic(ffffffff83395a3b) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8392a470,1,ffff800031bde328) at pool_do_get+0x5df pool_get(ffffffff8392a470,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000337fefb8,ffff800031bde580,41,ffff800031bde4d0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000337fefb8,ffff800031bde580,ffff800031bde4d0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800031bde580) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031bde580) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd298f6236f0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83395a3b) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8392a470,1,ffff800031bde328) at pool_do_get+0x5df pool_get(ffffffff8392a470,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000337fefb8,ffff800031bde580,41,ffff800031bde4d0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000337fefb8,ffff800031bde580,ffff800031bde4d0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800031bde580) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031bde580) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd298f6236f0, count: -8