panic: pool_do_get: shmpl free list modified: page 0xfffffd8068354000; item addr 0xfffffd8068354af0; offset 0x40=0x68a600ef Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 186502 98007 0 0 0 0 syz-executor *375570 98007 0 0 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83368921) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83908608,1,ffff80003c4ad5d8) at pool_do_get+0x5df pool_get(ffffffff83908608,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a37c030,ffff80003c4ad830,40,ffff80003c4ad780) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a37c030,ffff80003c4ad830,ffff80003c4ad780) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c4ad830) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4ad830) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd89f8ccbfd0, 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 0xfffffd8068354000; item addr 0xfffffd8068354af0; offset 0x40=0x68a600ef ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83368921) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83908608,1,ffff80003c4ad5d8) at pool_do_get+0x5df pool_get(ffffffff83908608,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a37c030,ffff80003c4ad830,40,ffff80003c4ad780) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a37c030,ffff80003c4ad830,ffff80003c4ad780) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c4ad830) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4ad830) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd89f8ccbfd0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4ad400 rbx 0xffff8000299eeddf rdx 0 rcx 0xffff80002a37c030 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xbd76e23d63b5e0bf r11 0x22a43da24574c15e r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff8182fd35 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4ad3f0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=375570 pid=98007 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a37c560,0xffff80002a37cfd0 process=0xffff800039c244f0 user=0xffff80003c4a8000, vmspace=0xfffffd8069acad78 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 98007 186502 45481 0 7 0 syz-executor 98007 133553 45481 0 3 0x4000080 fsleep syz-executor *98007 375570 45481 0 7 0x4000000 syz-executor 98007 387761 45481 0 2 0x4000000 syz-executor 77821 237120 21981 0 2 0 syz-executor 77821 287951 21981 0 3 0x4000080 fsleep syz-executor 48381 199808 33344 0 2 0 syz-executor 48381 221379 33344 0 2 0x4000000 syz-executor 85966 382952 76329 0 3 0x80 nanoslp syz-executor 85966 226573 76329 0 3 0x4000080 kqsel syz-executor 85966 423439 76329 0 3 0x4000080 fsleep syz-executor 10814 317617 31644 0 3 0x80 nanoslp syz-executor 10814 380903 31644 0 3 0x4000080 sbwait syz-executor 10814 59246 31644 0 3 0x4000080 fsleep syz-executor 26359 374777 47583 0 3 0x80 nanoslp syz-executor 26359 388438 47583 0 3 0x4000080 msgwait syz-executor 26359 457128 47583 0 3 0x4000080 msgwait syz-executor 26359 433383 47583 0 3 0x4000080 fsleep syz-executor 91658 68959 44960 0 3 0x80 nanoslp syz-executor 91658 469145 44960 0 3 0x4000080 ttyin syz-executor 91658 368931 44960 0 3 0x4000080 ttyout syz-executor 91658 268287 44960 0 3 0x4000080 ttyin syz-executor 91658 355958 44960 0 3 0x4000080 fsleep syz-executor 33344 155132 76248 0 3 0x82 nanoslp syz-executor 25801 401786 0 0 3 0x14200 bored sosplice 31644 338530 76248 0 3 0x82 nanoslp syz-executor 21981 54432 76248 0 3 0x82 nanoslp syz-executor 76329 146684 76248 0 3 0x82 nanoslp syz-executor 62899 497182 76248 0 3 0x82 wait syz-executor 47583 362531 76248 0 3 0x82 nanoslp syz-executor 45481 304496 76248 0 3 0x82 nanoslp syz-executor 44960 77365 76248 0 3 0x82 nanoslp syz-executor 76248 147400 42293 0 3 0x82 kqread syz-executor 42293 383331 20687 0 3 0x10008a sigsusp ksh 20687 203911 35253 0 3 0x98 kqread sshd-session 35253 338398 25051 0 3 0x92 kqread sshd-session 40126 90313 1 0 3 0x100083 ttyopn getty 25051 248329 1 0 3 0x88 kqread sshd 85354 230405 70582 74 3 0x1100092 bpf pflogd 70582 310266 1 0 3 0x80 sbwait pflogd 15649 214852 15009 73 3 0x1100090 kqread syslogd 15009 298385 1 0 3 0x100082 sbwait syslogd 86239 6430 1 0 3 0x100080 kqread resolvd 95292 431926 65626 77 3 0x100092 kqread dhcpleased 29516 197106 65626 77 3 0x100092 kqread dhcpleased 65626 230733 1 0 3 0x80 kqread dhcpleased 85158 413921 0 0 3 0x14200 bored smr 95135 341246 0 0 3 0x14200 pgzero zerothread 58091 133124 0 0 3 0x14200 aiodoned aiodoned 66145 15488 0 0 3 0x14200 syncer update 58499 84887 0 0 3 0x14200 cleaner cleaner 2509 176226 0 0 3 0x14200 reaper reaper 7294 377766 0 0 3 0x14200 pgdaemon pagedaemon 395 82697 0 0 3 0x14200 bored viomb 84883 96802 0 0 3 0x40014200 acpi0 acpi0 68483 70953 0 0 3 0x40014200 idle1 76787 216898 0 0 3 0x14200 bored softnet7 15395 72214 0 0 3 0x14200 bored softnet6 49901 65624 0 0 3 0x14200 bored softnet5 49075 419236 0 0 3 0x14200 bored softnet4 14685 308108 0 0 3 0x14200 bored softnet3 8143 164859 0 0 3 0x14200 bored softnet2 74409 475607 0 0 3 0x14200 bored softnet1 57264 42458 0 0 3 0x14200 bored softnet0 74866 65732 0 0 3 0x14200 smrbar systqmp 81020 68471 0 0 3 0x14200 bored systq 35259 77067 0 0 3 0x14200 tmoslp softclockmp 78430 73254 0 0 3 0x40014200 tmoslp softclock 80000 270279 0 0 3 0x40014200 idle0 1 341985 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 (0xffffffff83908620) #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:748 #7 Xsyscall+0x128 Process 98007 (syz-executor) thread 0xffff80002a37c030 (375570) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83990aa0) #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:748 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83908620) #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:748 #7 Xsyscall+0x128 Process 74866 (systqmp) thread 0xffff8000ffffe298 (65732) shared rwlock systqmp r = 0 (0xffffffff8382a218) #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 10221 11171K 11368K 166960K 12092 0 pcb 17 16K 18K 166960K 172 0 rtable 154 7K 8K 166960K 351 0 pf 32 17K 18K 166960K 76 0 ifaddr 33 5K 7K 166960K 69 0 ifgroup 51 2K 2K 166960K 95 0 sysctl 3 1K 9K 166960K 9 0 counters 66 36K 37K 166960K 108 0 ioctlops 0 0K 4K 166960K 1544 0 iov 0 0K 16K 166960K 19 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1460 92K 92K 166960K 1860 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 22 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 524 0 sigio 0 0K 0K 166960K 6 0 proc 72 115K 164K 166960K 599 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 63 0 in_multi 68 4K 7K 166960K 132 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 486 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 257 152K 165K 166960K 6508 0 UVM aobj 10 4K 4K 166960K 12 0 pinsyscall 43 86K 104K 166960K 1643 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 40 0 NDP 11 0K 2K 166960K 44 0 temp 54 8645K 8722K 166960K 27828 0 kqueue 14 20K 28K 166960K 89 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 54 0 50 1 0 1 1 0 8 0 rtentry 176 122 0 63 5 0 5 5 0 8 0 unpcb 144 238 0 217 2 1 1 2 0 8 0 syncache 336 7 0 7 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 117 0 111 1 0 1 1 0 8 0 arp 128 15 0 8 1 0 1 1 0 8 0 inpcb 328 634 0 625 11 1 10 10 0 8 8 nd6 144 22 0 10 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 15 0 15 1 0 1 1 0 8 1 pppxif 1504 1 0 1 1 0 1 1 0 8 1 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 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 pfstitem 24 49 0 2 1 0 1 1 0 8 0 pfstkey 128 49 0 2 2 0 2 2 0 8 0 pfstate 384 49 0 2 5 0 5 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 567 0 248 28 2 26 28 0 8 3 art_table 40 568 0 248 5 0 5 5 0 8 0 art_node 32 122 0 70 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 19 0 9 1 0 1 1 0 8 0 shmpl 112 9 0 2 1 0 1 1 0 8 0 pool(0xffffffff83908608:shmpl): page inconsistency: page 0xfffffd8068354000; 27 on list, 7 missing, 35 items per page dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2297 0 795 95 0 95 95 0 8 0 ffsino 296 2297 0 795 117 0 117 117 0 8 0 nchpl 144 3020 0 1328 63 0 63 63 0 8 0 rtmask 32 5 0 5 1 0 1 1 0 8 1 uvmvnodes 80 2729 0 0 56 0 56 56 0 8 0 vnodes 216 2729 0 0 152 0 152 152 0 8 0 namei 1024 10003 0 10003 1 0 1 1 0 8 1 percpumem 16 69 0 21 1 0 1 1 0 8 0 kstatmem 264 56 0 30 3 0 3 3 0 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 10656 0 10656 10 2 8 8 1 8 8 plimitpl 152 94 0 76 1 0 1 1 0 8 0 sigapl 424 828 0 773 7 0 7 7 0 8 0 knotepl 120 493 0 0 15 0 15 15 0 8 0 kqueuepl 224 178 0 166 3 0 3 3 0 8 2 pipepl 344 143 0 115 3 0 3 3 0 8 0 fdescpl 528 805 0 773 3 0 3 3 0 8 0 filepl 160 4127 0 3898 17 3 14 16 0 8 3 lockfpl 104 334 0 331 2 1 1 2 0 8 0 lockfspl 48 159 0 156 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 45 0 28 1 0 1 1 0 8 0 ucredpl 104 569 0 556 1 0 1 1 0 8 0 zombiepl 144 774 0 773 1 0 1 1 0 8 0 processpl 1232 828 0 773 5 0 5 5 0 8 0 procpl 664 1521 0 1450 7 0 7 7 0 8 0 sosppl 168 5 0 5 1 0 1 1 0 8 1 sockpl 752 950 0 916 15 3 12 14 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 1132 0 0 71 0 71 71 0 8 0 bufpl 280 3911 0 123 271 0 271 271 0 8 0 anonpl 32 7645 0 0 62 0 62 62 0 246 0 amapchunkpl 152 20441 0 19884 31 3 28 28 0 158 6 amappl16 200 2840 0 2805 16 5 11 15 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 120 0 108 1 0 1 1 0 8 0 amappl13 176 6 0 5 1 0 1 1 0 8 0 amappl12 168 1470 0 1438 3 1 2 2 0 8 0 amappl11 160 63 0 48 1 0 1 1 0 8 0 amappl10 152 19 0 18 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 24 0 22 1 0 1 1 0 8 0 amappl7 128 115 0 103 1 0 1 1 0 8 0 amappl6 120 219 0 216 1 0 1 1 0 8 0 amappl5 112 129 0 120 1 0 1 1 0 8 0 amappl4 104 322 0 302 1 0 1 1 0 8 0 amappl3 96 3878 0 3750 5 1 4 4 0 8 0 amappl2 88 669 0 608 2 0 2 2 0 8 0 amappl1 80 10503 0 9891 15 0 15 15 0 8 0 amappl 88 5737 0 5552 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 128 254 0 254 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 11 0 2 1 0 1 1 0 8 0 uaddrrnd 24 805 0 773 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 805 0 773 1 0 1 1 0 8 0 vmmpekpl 168 8345 0 8307 3 0 3 3 0 8 0 vmmpepl 168 57704 0 55644 100 0 100 100 0 357 9 vmsppl 488 804 0 773 5 0 5 5 0 8 1 rwobjpl 80 20793 0 17086 76 0 76 76 0 8 0 pdppl 4096 1618 0 1546 104 30 74 84 0 8 2 pvpl 32 15867 0 0 128 0 128 128 0 265 0 pmappl 256 804 0 773 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 332 0 34 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8378aff0) 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(ffffffff83990898) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83990898) at __mp_lock+0x199 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 sys/dev/kcov.c:153 uvm_fault(fffffd8069acad78,d8a5f818000,0,2) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80003c455450,d8a5f818000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c455450) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x797bbf98b370, count: 3 ddb{0}> trace x86_ipi_db(ffffffff8378aff0) 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(ffffffff83990898) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83990898) at __mp_lock+0x199 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 sys/dev/kcov.c:153 uvm_fault(fffffd8069acad78,d8a5f818000,0,2) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80003c455450,d8a5f818000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c455450) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x797bbf98b370, 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:438 panic(ffffffff83368921) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83908608,1,ffff80003c4ad5d8) at pool_do_get+0x5df pool_get(ffffffff83908608,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a37c030,ffff80003c4ad830,40,ffff80003c4ad780) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a37c030,ffff80003c4ad830,ffff80003c4ad780) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c4ad830) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4ad830) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd89f8ccbfd0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83368921) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83908608,1,ffff80003c4ad5d8) at pool_do_get+0x5df pool_get(ffffffff83908608,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a37c030,ffff80003c4ad830,40,ffff80003c4ad780) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a37c030,ffff80003c4ad830,ffff80003c4ad780) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c4ad830) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4ad830) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd89f8ccbfd0, count: -8