panic: pool_do_get: shmpl free list modified: page 0xfffffd806c403000; item addr 0xfffffd806c403ee0; offset 0x40=0x69f6acf9 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 335258 38740 32767 0x10 0 0 syz-executor *211343 70625 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83447321) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83aaaf40,1,ffff80003bfcddf8) at pool_do_get+0x5df pool_get(ffffffff83aaaf40,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6d18,ffff80003bfce050,40,ffff80003bfcdfa0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6d18,ffff80003bfce050,ffff80003bfcdfa0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80003bfce050) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bfce050) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79f8aa413c0, 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 0xfffffd806c403000; item addr 0xfffffd806c403ee0; offset 0x40=0x69f6acf9 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83447321) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83aaaf40,1,ffff80003bfcddf8) at pool_do_get+0x5df pool_get(ffffffff83aaaf40,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6d18,ffff80003bfce050,40,ffff80003bfcdfa0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6d18,ffff80003bfce050,ffff80003bfcdfa0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80003bfce050) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bfce050) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79f8aa413c0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003bfcdc20 rbx 0xffff8000299aee07 rdx 0xffff8000015da380 rcx 0xffff8000fffe6d18 rax 0xffff8000299adff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x64ffe54526ac1363 r11 0xbe151ddd2e12670a r12 0xffff8000299aec08 r13 0 r14 0 r15 0x1 rip 0xffffffff8193c975 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003bfcdc10 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=211343 pid=70625 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=71, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe62b8,0xffff8000fffe6560 process=0xffff80003bfdce90 user=0xffff80003bfc9000, vmspace=0xfffffd806c168400 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34763 164872 57341 32767 2 0x10 syz-executor 38740 335258 14528 32767 7 0x10 syz-executor 38740 149374 14528 32767 2 0x4000010 syz-executor 93183 71662 10398 0 2 0x100000 sh 70625 297622 77626 32767 2 0x10 syz-executor *70625 211343 77626 32767 7 0x4000010 syz-executor 90170 127079 30906 32767 2 0x10 syz-executor 90170 478936 30906 32767 2 0x4000010 syz-executor 10398 373238 86989 0 3 0x10008a sigsusp sh 75093 120399 65548 32767 3 0x90 nanoslp syz-executor 75093 31304 65548 32767 3 0x4000090 sbwait syz-executor 75093 52250 65548 32767 3 0x4000090 fsleep syz-executor 22001 402534 65173 32767 3 0x90 nanoslp syz-executor 22001 433954 65173 32767 3 0x4000090 ttyout syz-executor 22001 467265 65173 32767 3 0x4000090 fsleep syz-executor 14528 500820 16119 32767 3 0x90 nanoslp syz-executor 86989 163359 34980 0 3 0x80 wait syz-executor 77626 341755 47526 32767 3 0x90 nanoslp syz-executor 30906 403738 42331 32767 3 0x90 nanoslp syz-executor 65548 254070 63873 32767 3 0x90 nanoslp syz-executor 65173 364677 9388 32767 3 0x90 nanoslp syz-executor 57341 197480 93395 32767 2 0x10 syz-executor 77168 264418 70983 32767 3 0x10 biowait syz-executor 47526 144838 80143 0 3 0x82 wait syz-executor 34980 410607 80143 0 3 0x82 wait syz-executor 42331 235998 80143 0 3 0x82 wait syz-executor 63873 54842 80143 0 3 0x82 wait syz-executor 9388 503140 80143 0 3 0x82 wait syz-executor 16119 62091 80143 0 3 0x82 wait syz-executor 70983 124892 80143 0 3 0x82 wait syz-executor 93395 144410 80143 0 3 0x82 wait syz-executor 80143 486400 76570 0 3 0x82 kqread syz-executor 76570 524172 28408 0 3 0x10008a sigsusp ksh 28408 247536 70134 0 3 0x98 kqread sshd-session 70134 231743 65114 0 3 0x92 kqread sshd-session 20685 299088 1 0 3 0x100083 ttyin getty 65114 482991 1 0 3 0x88 kqread sshd 36967 212877 58573 73 3 0x1100090 kqread syslogd 58573 278081 1 0 3 0x100082 sbwait syslogd 11591 428070 1 0 3 0x100080 kqread resolvd 96227 117530 78438 77 3 0x100092 kqread dhcpleased 93688 94345 78438 77 3 0x100092 kqread dhcpleased 78438 332129 1 0 3 0x80 kqread dhcpleased 97213 212502 0 0 3 0x14200 bored smr 34028 292002 0 0 2 0x14200 zerothread 57700 53696 0 0 3 0x14200 aiodoned aiodoned 1696 369984 0 0 3 0x14200 syncer update 21868 235382 0 0 3 0x14200 cleaner cleaner 63985 182516 0 0 3 0x14200 reaper reaper 62867 219699 0 0 3 0x14200 pgdaemon pagedaemon 29447 267961 0 0 3 0x14200 bored viomb 36216 443581 0 0 3 0x40014200 acpi0 acpi0 91151 153737 0 0 3 0x40014200 idle1 29923 27239 0 0 3 0x14200 bored softnet1 72317 205412 0 0 3 0x14200 bored softnet0 17925 386755 0 0 3 0x14200 smrbar systqmp 71316 104181 0 0 3 0x14200 bored systq 37782 461212 0 0 3 0x14200 tmoslp softclockmp 56553 173834 0 0 3 0x40014200 tmoslp softclock 76522 339552 0 0 3 0x40014200 idle0 1 473220 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 (0xffffffff83aaaf58) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:484 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 70625 (syz-executor) thread 0xffff8000fffe6d18 (211343) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8399fe40) #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:783 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83aaaf58) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:484 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 77168 (syz-executor) thread 0xffff8000fffef770 (264418) exclusive rrwlock inode r = 0 (0xfffffd806b63bb28) #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+0xbd 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:3143 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d886e88) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #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:3128 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 17925 (systqmp) thread 0xffff8000ffffe530 (386755) shared rwlock systqmp r = 0 (0xffffffff83875878) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11050 12018K 12034K 166960K 12141 0 pcb 17 12K 12K 166960K 17 0 rtable 223 6K 6K 166960K 335 0 pf 31 16K 16K 166960K 31 0 ifaddr 40 7K 7K 166960K 42 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1287 81K 81K 166960K 1352 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 121K 166960K 153 0 proc 59 115K 147K 166960K 490 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 8 0 in_multi 89 6K 6K 166960K 89 0 ether_multi 1 0K 0K 166960K 1 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 43 201K 201K 166960K 43 0 exec 0 0K 1K 166960K 359 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 236 168K 175K 166960K 3089 0 UVM aobj 35 2K 2K 166960K 36 0 pinsyscall 47 94K 110K 166960K 1230 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 25 1K 1K 166960K 25 0 temp 34 9074K 9149K 166960K 4005 0 kqueue 13 20K 22K 166960K 23 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 35 0 32 1 0 1 1 0 8 0 rtentry 176 104 0 1 5 0 5 5 0 8 0 unpcb 144 39 0 20 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 77 0 72 7 0 7 7 0 8 6 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 200 0 191 9 0 9 9 0 8 8 nd6 152 21 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 256 413 0 0 26 0 26 26 0 8 0 art_table 40 414 0 0 5 0 5 5 0 8 0 art_node 32 104 0 9 1 0 1 1 0 8 0 shmpl 112 33 0 1 1 0 1 1 0 8 0 pool(0xffffffff83aaaf40:shmpl): page inconsistency: page 0xfffffd806c403000; 2 on list, 32 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1564 0 105 92 0 92 92 0 8 0 ffsino 296 1564 0 105 113 0 113 113 0 8 0 nchpl 144 1770 0 83 63 0 63 63 0 8 0 vnodes 216 1645 0 0 92 0 92 92 0 8 0 namei 1024 5128 0 5127 1 0 1 1 0 8 0 percpumem 16 50 0 0 1 0 1 1 0 8 0 kstatmem 264 25 0 0 2 0 2 2 0 8 0 scxspl 216 6025 0 6024 3 0 3 3 1 8 2 plimitpl 152 135 0 107 2 0 2 2 0 8 0 sigapl 424 447 0 393 7 0 7 7 0 8 0 knotepl 120 101 0 0 4 0 4 4 0 8 0 kqueuepl 224 52 0 43 1 0 1 1 0 8 0 pipepl 344 119 0 92 3 0 3 3 0 8 0 fdescpl 528 431 0 393 3 0 3 3 0 8 0 filepl 160 1560 0 1349 14 0 14 14 0 8 5 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 22 0 6 1 0 1 1 0 8 0 pgrppl 48 30 0 6 1 0 1 1 0 8 0 ucredpl 104 96 0 78 1 0 1 1 0 8 0 zombiepl 144 393 0 393 1 0 1 1 0 8 1 processpl 1232 447 0 393 5 0 5 5 0 8 0 procpl 664 475 0 414 6 0 6 6 0 8 0 sockpl 752 275 0 244 14 0 14 14 0 8 10 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 152 0 0 10 0 10 10 0 8 0 bufpl 280 2229 0 102 152 0 152 152 0 8 0 anonpl 32 3557 0 0 29 0 29 29 0 246 0 amapchunkpl 152 8444 0 7945 20 0 20 20 0 158 0 amappl16 200 1483 0 1468 5 0 5 5 0 8 4 amappl15 192 10 0 9 1 0 1 1 0 8 0 amappl14 184 409 0 407 1 0 1 1 0 8 0 amappl13 176 110 0 100 1 0 1 1 0 8 0 amappl12 168 663 0 629 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 0 1 1 0 8 1 amappl10 152 149 0 139 1 0 1 1 0 8 0 amappl9 144 296 0 296 1 0 1 1 0 8 1 amappl8 136 93 0 92 1 0 1 1 0 8 0 amappl7 128 135 0 124 1 0 1 1 0 8 0 amappl6 120 150 0 148 1 0 1 1 0 8 0 amappl5 112 106 0 97 1 0 1 1 0 8 0 amappl4 104 266 0 248 1 0 1 1 0 8 0 amappl3 96 1481 0 1362 4 1 3 3 0 8 0 amappl2 88 494 0 443 2 0 2 2 0 8 0 amappl1 80 9036 0 8462 14 0 14 14 0 8 1 amappl 88 2421 0 2250 4 0 4 4 0 92 0 uvmvnodes 80 97 0 0 2 0 2 2 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 35 0 1 1 0 1 1 0 8 0 uaddrrnd 24 431 0 393 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 431 0 393 1 0 1 1 0 8 0 vmmpekpl 168 5207 0 5179 2 0 2 2 0 8 0 vmmpepl 168 35271 0 33258 92 0 92 92 0 357 1 vmsppl 488 430 0 393 7 1 6 6 0 8 0 rwobjpl 80 12976 0 12016 22 0 22 22 0 8 1 pdppl 4096 869 0 786 113 18 95 95 0 8 12 pvpl 32 9196 0 0 75 0 75 75 0 265 0 pmappl 256 430 0 393 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 279 0 21 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838aeff0) 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(ffffffff8399f640) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff8399f640) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003bfbc870,ffff8000002a3480) 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: 0x704cc416ed70, count: 9 ddb{0}> trace x86_ipi_db(ffffffff838aeff0) 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(ffffffff8399f640) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff8399f640) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003bfbc870,ffff8000002a3480) 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: 0x704cc416ed70, 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(ffffffff83447321) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83aaaf40,1,ffff80003bfcddf8) at pool_do_get+0x5df pool_get(ffffffff83aaaf40,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6d18,ffff80003bfce050,40,ffff80003bfcdfa0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6d18,ffff80003bfce050,ffff80003bfcdfa0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80003bfce050) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bfce050) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79f8aa413c0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83447321) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83aaaf40,1,ffff80003bfcddf8) at pool_do_get+0x5df pool_get(ffffffff83aaaf40,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6d18,ffff80003bfce050,40,ffff80003bfcdfa0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6d18,ffff80003bfce050,ffff80003bfcdfa0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80003bfce050) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bfce050) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79f8aa413c0, count: -8