panic: pool_do_get: shmpl free list modified: page 0xfffffd8067d7b000; item addr 0xfffffd8067d7b6a0; offset 0x2c=0xdeaf4151 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 160226 12011 0 0 0 0 syz-executor *505263 12011 0 0 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830632c9) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83612270,1,ffff800035584428) at pool_do_get+0x5e6 pool_get(ffffffff83612270,1) at pool_get+0x141 shmget_allocate_segment(ffff8000ffffca30,ffff800035584680,11,ffff8000355845d0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffffca30,ffff800035584680,ffff8000355845d0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff800035584680) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800035584680) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4ab9852af0, 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 0xfffffd8067d7b000; item addr 0xfffffd8067d7b6a0; offset 0x2c=0xdeaf4151 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830632c9) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83612270,1,ffff800035584428) at pool_do_get+0x5e6 pool_get(ffffffff83612270,1) at pool_get+0x141 shmget_allocate_segment(ffff8000ffffca30,ffff800035584680,11,ffff8000355845d0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffffca30,ffff800035584680,ffff8000355845d0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff800035584680) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800035584680) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4ab9852af0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800035584270 rbx 0xffff800029b7cd87 rdx 0xffff8000011e4ac0 rcx 0xffff8000ffffca30 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x33083745be908610 r11 0x755fb8c56c85e8be r12 0xffff800029b7cb88 r13 0 r14 0 r15 0x1 rip 0xffffffff81b98cd5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800035584260 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=505263 pid=12011 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a03e530,0xffffffff83563a80 process=0xffff800036d88db8 user=0xffff80003557f000, vmspace=0xfffffd806c2d5a68 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 12011 160226 832 0 7 0 syz-executor *12011 505263 832 0 7 0x4000000 syz-executor 41556 106002 84670 0 2 0 syz-executor 41556 57401 84670 0 3 0x4000080 fsleep syz-executor 71008 406252 58292 0 2 0 syz-executor 71008 144983 58292 0 3 0x4000080 fsleep syz-executor 75298 223327 95852 0 2 0 syz-executor 75298 124457 95852 0 3 0x4000080 ttyout syz-executor 75298 104545 95852 0 3 0x4000080 fsleep syz-executor 39891 40797 12559 0 2 0 syz-executor 39891 457007 12559 0 3 0x4000080 fsleep syz-executor 31892 50868 5792 0 2 0 syz-executor 31892 448430 5792 0 3 0x4000080 fsleep syz-executor 46168 469956 78119 0 3 0x90 nanoslp syz-executor 46168 371586 78119 0 3 0x4000090 ttyout syz-executor 832 200194 67517 0 3 0x82 nanoslp syz-executor 84670 90477 67517 0 3 0x82 nanoslp syz-executor 12559 216298 67517 0 3 0x82 nanoslp syz-executor 78119 194725 67517 0 3 0x82 nanoslp syz-executor 5792 477347 67517 0 3 0x82 nanoslp syz-executor 58292 242028 67517 0 3 0x82 nanoslp syz-executor 95852 448673 67517 0 3 0x82 nanoslp syz-executor 77801 478787 67517 0 3 0x2 biowait syz-executor 30245 401714 1 0 3 0x100083 ttyin getty 66599 26536 0 0 3 0x14200 bored sosplice 67517 67975 64000 0 3 0x82 kqread syz-executor 64000 510562 46367 0 3 0x10008a sigsusp ksh 46367 392621 98774 0 3 0x98 kqread sshd-session 98774 23550 74048 0 3 0x92 kqread sshd-session 74048 47375 1 0 3 0x88 kqread sshd 33193 282794 99147 74 3 0x1100092 bpf pflogd 99147 264770 1 0 3 0x80 sbwait pflogd 69663 387586 8604 73 3 0x1100010 ffs_fsync syslogd 8604 94661 1 0 3 0x100082 sbwait syslogd 3491 182047 1 0 3 0x100080 kqread resolvd 21705 372192 61313 77 3 0x100092 kqread dhcpleased 25384 429404 61313 77 3 0x100092 kqread dhcpleased 61313 456572 1 0 3 0x80 kqread dhcpleased 44973 446664 0 0 3 0x14200 bored smr 64111 420954 0 0 2 0x14200 zerothread 96184 412828 0 0 3 0x14200 aiodoned aiodoned 76629 514671 0 0 3 0x14200 syncer update 92341 249067 0 0 3 0x14200 cleaner cleaner 82218 267177 0 0 3 0x14200 reaper reaper 19238 357784 0 0 3 0x14200 pgdaemon pagedaemon 44309 482317 0 0 3 0x14200 bored viomb 72164 253543 0 0 3 0x40014200 acpi0 acpi0 26617 252656 0 0 3 0x40014200 idle1 33078 333240 0 0 3 0x14200 bored softnet3 49192 256148 0 0 3 0x14200 bored softnet2 61725 58392 0 0 3 0x14200 bored softnet1 94412 18883 0 0 3 0x14200 bored softnet0 21320 22450 0 0 3 0x14200 bored systqmp 63508 14657 0 0 3 0x14200 bored systq 46296 183791 0 0 3 0x14200 tmoslp softclockmp 35408 287588 0 0 3 0x40014200 tmoslp softclock 38111 312032 0 0 3 0x40014200 idle0 1 189404 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 (0xffffffff83612280) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x103 sys/kern/subr_pool.c:579 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 12011 (syz-executor) thread 0xffff8000ffffca30 (505263) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff836322c8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #1 syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83612280) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x103 sys/kern/subr_pool.c:579 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 77801 (syz-executor) thread 0xffff80002a03fbf8 (478787) exclusive rrwlock inode r = 0 (0xfffffd807895c0a8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:97 #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:1852 #13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806aae7f78) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 cache_lookup+0x36e sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x218 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #10 namei+0x7aa sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #12 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #12 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 Process 69663 (syslogd) thread 0xffff8000ffffd960 (387586) exclusive rrwlock inode r = 0 (0xfffffd806e4a54e0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2926 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 10100K 10487K 166960K 12654 0 pcb 17 16K 18K 166960K 320 0 rtable 226 7K 7K 166960K 2377 0 pf 39 18K 22K 166960K 262 0 ifaddr 44 8K 8K 166960K 311 0 ifgroup 60 2K 2K 166960K 330 0 sysctl 3 1K 1K 166960K 3 0 counters 66 36K 36K 166960K 208 0 ioctlops 0 0K 4K 166960K 1638 0 iov 0 0K 24K 166960K 68 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1501 94K 94K 166960K 3056 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 46 0 dirhash 15 2K 3K 166960K 27 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 17 61K 93K 166960K 1995 0 sigio 0 0K 0K 166960K 37 0 proc 70 91K 128K 166960K 2326 0 subproc 104 6K 7K 166960K 897 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 143 0 in_multi 99 7K 7K 166960K 793 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 1302 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 243 73K 92K 166960K 16560 0 UVM aobj 95 4K 6K 166960K 104 0 pinsyscall 42 84K 102K 166960K 4688 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 52 0 NDP 13 0K 1K 166960K 224 0 temp 73 6823K 7081K 166960K 56309 0 kqueue 17 28K 33K 166960K 185 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 120 362 0 359 5 2 3 3 0 8 2 rtentry 112 826 0 723 4 1 3 4 0 8 0 unpcb 144 1094 0 1073 16 14 2 6 0 8 1 syncache 336 12 0 12 6 5 1 1 0 8 1 tcpqe 32 5 0 5 2 1 1 1 0 8 1 tcpcb 808 452 0 446 19 11 8 8 0 8 7 arp 120 148 0 129 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 336 1840 0 1826 35 25 10 12 0 8 8 nd6 136 216 0 191 1 0 1 1 0 8 0 pkpcb 40 5 0 5 3 3 0 1 0 8 0 kcovpl 48 69 0 61 1 0 1 1 0 8 0 ppxss 1168 7 0 7 4 3 1 1 0 8 1 pfstscr 40 3 0 3 3 2 1 1 0 8 1 pffrag 232 5 0 4 2 1 1 1 0 482 0 pffrnode 88 5 0 4 2 1 1 1 0 8 0 pffrent 40 51 0 50 4 3 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 24 145 0 109 1 0 1 1 0 8 0 pfstkey 128 151 0 115 3 1 2 2 0 8 0 pfstate 376 146 0 112 5 1 4 4 0 8 0 pfrule 1344 24 0 19 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 3305 0 2853 36 7 29 29 0 8 0 art_table 32 3306 0 2853 4 0 4 4 0 8 0 art_node 16 821 0 730 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 13 1 0 1 1 0 8 0 semapl 112 43 0 33 1 0 1 1 0 8 0 shmpl 112 101 0 9 3 0 3 3 0 8 0 pool(0xffffffff83612270:shmpl): page inconsistency: page 0xfffffd8067d7b000; 12 on list, 22 missing, 35 items per page dirhash 1024 27 0 8 3 0 3 3 0 8 0 dino2pl 256 3453 0 1824 102 0 102 102 0 8 0 ffsino 272 3453 0 1824 109 0 109 109 0 8 0 nchpl 144 5074 0 4432 66 36 30 66 0 8 3 uvmvnodes 80 4868 0 0 100 0 100 100 0 8 0 vnodes 216 4868 0 0 271 0 271 271 0 8 0 namei 1024 23050 0 23050 5 4 1 1 0 8 1 percpumem 16 118 0 71 1 0 1 1 0 8 0 kstatmem 264 168 0 142 2 0 2 2 0 8 0 scsiplug 72 4 0 4 3 3 0 1 0 8 0 scxspl 216 34185 0 34183 12 9 3 8 1 8 2 plimitpl 152 426 0 407 1 0 1 1 0 8 0 sigapl 424 2201 0 2151 9 0 9 9 0 8 2 futexpl 64 15323 0 15318 4 3 1 1 0 8 0 knotepl 120 457 0 0 10 0 10 10 0 8 0 kqueuepl 216 398 0 384 11 9 2 5 0 8 1 pipepl 320 410 0 382 5 2 3 5 0 8 0 fdescpl 496 2161 0 2130 7 2 5 5 0 8 0 filepl 152 11625 0 11356 42 24 18 18 0 8 7 lockfpl 104 481 0 478 1 0 1 1 0 8 0 lockfspl 48 167 0 164 1 0 1 1 0 8 0 sessionpl 144 91 0 82 1 0 1 1 0 8 0 pgrppl 48 170 0 153 1 0 1 1 0 8 0 ucredpl 104 1578 0 1564 1 0 1 1 0 8 0 zombiepl 144 2151 0 2151 2 1 1 1 0 8 1 processpl 1160 2201 0 2151 7 1 6 6 0 8 1 procpl 648 3771 0 3713 8 0 8 8 0 8 1 srpgc 96 4 0 4 1 1 0 1 0 8 0 sosppl 168 8 0 8 3 2 1 1 0 8 1 sockpl 664 3316 0 3279 59 48 11 19 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 255 0 0 31 0 31 31 0 8 0 mtagpl 96 74 0 0 2 0 2 2 0 8 0 mbufpl 256 730 0 0 40 0 40 40 0 8 0 bufpl 280 9862 0 3007 490 0 490 490 0 8 0 anonpl 24 343359 0 337822 93 30 63 64 0 185 13 amapchunkpl 152 52148 0 51555 54 21 33 36 0 158 9 amappl16 200 6446 0 6385 43 35 8 19 0 8 2 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 272 0 260 1 0 1 1 0 8 0 amappl13 176 15 0 15 1 1 0 1 0 8 0 amappl12 168 3787 0 3756 3 1 2 2 0 8 0 amappl11 160 72 0 58 1 0 1 1 0 8 0 amappl10 152 70 0 70 1 1 0 1 0 8 0 amappl9 144 127 0 127 1 1 0 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 247 0 235 1 0 1 1 0 8 0 amappl6 120 789 0 787 1 0 1 1 0 8 0 amappl5 112 382 0 371 1 0 1 1 0 8 0 amappl4 104 536 0 516 1 0 1 1 0 8 0 amappl3 96 9192 0 9090 3 0 3 3 0 8 0 amappl2 88 2549 0 2470 2 0 2 2 0 8 0 amappl1 80 18658 0 18069 17 2 15 15 0 8 0 amappl 88 15628 0 15447 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 8 0 8 2 2 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 103 0 9 2 0 2 2 0 8 0 uaddrrnd 24 2161 0 2130 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2161 0 2130 1 0 1 1 0 8 0 vmmpekpl 168 20612 0 20563 4 0 4 4 0 8 0 vmmpepl 168 142701 0 140765 135 42 93 99 0 357 6 vmsppl 440 2160 0 2130 6 2 4 5 0 8 0 rwobjpl 56 46264 0 40310 87 3 84 84 0 8 0 pdppl 4096 4329 0 4260 200 129 71 85 0 8 2 pvpl 32 30450 0 0 246 1 245 245 0 265 0 pmappl 248 2160 0 2130 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 598 0 186 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8344dff0) 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(ffffffff836320c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836320c0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff8000355b43a0,ffff800000079f80) 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: 0x7ad469f49760, count: 9 ddb{0}> trace x86_ipi_db(ffffffff8344dff0) 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(ffffffff836320c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836320c0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff8000355b43a0,ffff800000079f80) 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: 0x7ad469f49760, 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(ffffffff830632c9) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83612270,1,ffff800035584428) at pool_do_get+0x5e6 pool_get(ffffffff83612270,1) at pool_get+0x141 shmget_allocate_segment(ffff8000ffffca30,ffff800035584680,11,ffff8000355845d0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffffca30,ffff800035584680,ffff8000355845d0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff800035584680) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800035584680) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4ab9852af0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830632c9) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83612270,1,ffff800035584428) at pool_do_get+0x5e6 pool_get(ffffffff83612270,1) at pool_get+0x141 shmget_allocate_segment(ffff8000ffffca30,ffff800035584680,11,ffff8000355845d0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffffca30,ffff800035584680,ffff8000355845d0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff800035584680) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800035584680) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4ab9852af0, count: -8