panic: pool_do_get: shmpl free list modified: page 0xfffffd806b4c5000; item addr 0xfffffd806b4c5770; offset 0x40=0x68bea02d Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 503359 60039 32767 0x10 0 0 syz-executor *436425 60039 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336926c) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839b92e0,2,ffff80003703d508) at pool_do_get+0x5df pool_get(ffffffff839b92e0,2) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003b061a20,ffff80003703d760,34,ffff80003703d6b0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003b061a20,ffff80003703d760,ffff80003703d6b0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003703d760) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003703d760) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdbc283c1da0, 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 0xfffffd806b4c5000; item addr 0xfffffd806b4c5770; offset 0x40=0x68bea02d ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336926c) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839b92e0,2,ffff80003703d508) at pool_do_get+0x5df pool_get(ffffffff839b92e0,2) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003b061a20,ffff80003703d760,34,ffff80003703d6b0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003b061a20,ffff80003703d760,ffff80003703d6b0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003703d760) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003703d760) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdbc283c1da0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003703d330 rbx 0xffff8000299eeddf rdx 0 rcx 0xffff80003b061a20 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x86e6ffdead554235 r11 0x37ac27ac285f1ffa r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff818a7905 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003703d320 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=436425 pid=60039 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=80, usrpri=80, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003b060d28,0xffffffff838ce1d8 process=0xffff80003b05f050 user=0xffff800037038000, vmspace=0xfffffd806baf5d80 estcpu=30, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 60039 503359 83688 32767 7 0x10 syz-executor *60039 436425 83688 32767 7 0x4000010 syz-executor 52606 225144 87809 32767 2 0x10 syz-executor 52606 19795 87809 32767 3 0x4000090 fsleep syz-executor 52606 181215 87809 32767 2 0x4000090 syz-executor 55462 20403 91468 32767 2 0x10 syz-executor 55462 107756 91468 32767 3 0x4000090 ttyin syz-executor 13851 37821 97869 32767 2 0x10 syz-executor 13851 419585 97869 32767 3 0x4000090 fsleep syz-executor 13851 251406 97869 32767 2 0x4000010 syz-executor 52874 263889 49377 32767 2 0x10 syz-executor 52874 345290 49377 32767 3 0x4000090 fsleep syz-executor 52874 95106 49377 32767 3 0x4000090 fsleep syz-executor 52874 364979 49377 32767 3 0x4000090 fsleep syz-executor 39424 290683 70791 32767 2 0xc90 syz-executor 39424 84330 70791 32767 3 0x4000090 msgwait syz-executor 39424 506954 70791 32767 3 0x4000090 fsleep syz-executor 51678 292018 60162 0 3 0x82 sbwait sshd-session 59424 147268 29009 32767 3 0x90 nanoslp syz-executor 59424 366746 29009 32767 3 0x4000090 ttyin syz-executor 59424 216963 29009 32767 3 0x4000090 ttyin syz-executor 59424 81371 29009 32767 3 0x4000090 fsleep syz-executor 94849 108802 0 0 3 0x14200 bored sosplice 49377 509973 92304 32767 2 0xc90 syz-executor 48318 162844 95242 32767 3 0x10 biowait syz-executor 70791 244011 6516 32767 3 0x90 nanoslp syz-executor 91468 25388 16795 32767 2 0xc90 syz-executor 87809 466763 20913 32767 3 0x90 nanoslp syz-executor 83688 106821 12024 32767 2 0x10 syz-executor 29009 338910 62846 32767 3 0x90 nanoslp syz-executor 97869 488262 78390 32767 2 0xc90 syz-executor 6516 354140 43930 0 3 0x82 wait syz-executor 95242 462953 43930 0 3 0x82 wait syz-executor 92304 288819 43930 0 3 0x82 wait syz-executor 20913 209235 43930 0 3 0x82 wait syz-executor 16795 174889 43930 0 3 0x82 wait syz-executor 62846 299729 43930 0 3 0x82 wait syz-executor 12024 114444 43930 0 3 0x82 wait syz-executor 78390 235159 43930 0 3 0x82 wait syz-executor 43930 332782 22814 0 3 0x82 kqread syz-executor 22814 170189 84896 0 3 0x10008a sigsusp ksh 84896 461222 84480 0 3 0x98 kqread sshd-session 84480 29719 60162 0 3 0x92 kqread sshd-session 32313 473741 1 0 3 0x100083 ttyin getty 60162 38264 1 0 3 0x88 kqread sshd 80116 441467 39280 73 3 0x1100090 kqread syslogd 39280 144126 1 0 3 0x100082 sbwait syslogd 46878 155971 1 0 3 0x100080 kqread resolvd 52288 257400 67286 77 3 0x100092 kqread dhcpleased 59738 351678 67286 77 3 0x100092 kqread dhcpleased 67286 228547 1 0 3 0x80 kqread dhcpleased 44185 159402 0 0 3 0x14200 bored smr 60259 140534 0 0 2 0x14200 zerothread 10328 245989 0 0 3 0x14200 aiodoned aiodoned 11143 300998 0 0 3 0x14200 syncer update 34097 455537 0 0 3 0x14200 cleaner cleaner 46349 344925 0 0 3 0x14200 reaper reaper 51034 402853 0 0 3 0x14200 pgdaemon pagedaemon 69435 481812 0 0 3 0x14200 bored viomb 8114 54346 0 0 3 0x40014200 acpi0 acpi0 24310 350534 0 0 3 0x40014200 idle1 91206 143746 0 0 3 0x14200 bored softnet7 62992 63036 0 0 3 0x14200 bored softnet6 18842 71210 0 0 3 0x14200 bored softnet5 5446 500348 0 0 3 0x14200 bored softnet4 24737 450493 0 0 3 0x14200 bored softnet3 64242 197235 0 0 3 0x14200 bored softnet2 36914 371736 0 0 3 0x14200 bored softnet1 76533 414311 0 0 3 0x14200 bored softnet0 76342 67108 0 0 3 0x14200 bored systqmp 12616 112958 0 0 3 0x14200 bored systq 12859 277233 0 0 3 0x14200 tmoslp softclockmp 10392 498494 0 0 3 0x40014200 tmoslp softclock 80664 510869 0 0 3 0x40014200 idle0 1 54339 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 (0xffffffff839b92f8) #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:746 #7 Xsyscall+0x128 Process 60039 (syz-executor) thread 0xffff80003b061a20 (436425) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83876370) #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:746 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839b92f8) #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:746 #7 Xsyscall+0x128 Process 48318 (syz-executor) thread 0xffff80002a2e4a80 (162844) exclusive rrwlock inode r = 0 (0xfffffd806b82b8f8) #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:746 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806bf5d0d0) #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:746 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10196 10957K 10968K 166960K 11274 0 pcb 17 12K 12K 166960K 17 0 rtable 209 5K 6K 166960K 278 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 4 1K 9K 166960K 10 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 35 0 iov 0 0K 16K 166960K 60 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1372 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 21 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 121K 166960K 454 0 sigio 0 0K 0K 166960K 9 0 proc 58 99K 147K 166960K 508 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 70 0 in_multi 100 7K 7K 166960K 124 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 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 368 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 270 170K 174K 166960K 5597 0 UVM aobj 12 2K 3K 166960K 14 0 pinsyscall 48 96K 110K 166960K 1484 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 11 0K 2K 166960K 27 0 temp 61 8652K 8716K 166960K 5394 0 kqueue 13 20K 28K 166960K 66 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 58 0 55 1 0 1 1 0 8 0 rtentry 176 100 0 4 5 0 5 5 0 8 0 unpcb 144 263 0 241 2 0 2 2 0 8 1 syncache 336 11 0 11 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 142 0 133 2 0 2 2 0 8 0 arp 136 11 0 0 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 328 479 0 465 7 0 7 7 0 8 5 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 144 20 0 3 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 256 451 0 13 29 0 29 29 0 8 0 art_table 40 452 0 13 5 0 5 5 0 8 0 art_node 32 100 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 7 1 0 1 1 0 8 0 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 11 0 2 1 0 1 1 0 8 0 pool(0xffffffff839b92e0:shmpl): page inconsistency: page 0xfffffd806b4c5000; 25 on list, 9 missing, 35 items per page dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1993 0 484 95 0 95 95 0 8 0 ffsino 296 1993 0 484 117 0 117 117 0 8 0 nchpl 144 2624 0 947 63 0 63 63 0 8 0 uvmvnodes 80 2074 0 0 43 0 43 43 0 8 0 vnodes 216 2074 0 0 116 0 116 116 0 8 0 namei 1024 7984 0 7983 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 9323 0 9322 5 1 4 4 1 8 3 plimitpl 152 90 0 64 2 0 2 2 0 8 0 sigapl 424 737 0 676 8 0 8 8 0 8 0 knotepl 120 352 0 0 11 0 11 11 0 8 0 kqueuepl 224 100 0 91 1 0 1 1 0 8 0 pipepl 344 131 0 104 3 0 3 3 0 8 0 fdescpl 528 714 0 676 3 0 3 3 0 8 0 filepl 160 3105 0 2879 13 0 13 13 0 8 3 lockfpl 104 79 0 77 1 0 1 1 0 8 0 lockfspl 48 31 0 29 1 0 1 1 0 8 0 sessionpl 144 28 0 11 1 0 1 1 0 8 0 pgrppl 48 44 0 19 1 0 1 1 0 8 0 ucredpl 104 439 0 420 1 0 1 1 0 8 0 zombiepl 144 676 0 676 1 0 1 1 0 8 1 processpl 1232 737 0 676 7 1 6 6 0 8 0 procpl 664 1245 0 1170 7 0 7 7 0 8 0 sosppl 168 3 0 3 1 0 1 1 0 8 1 sockpl 752 809 0 770 11 0 11 11 0 8 6 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 1828 0 0 115 0 115 115 0 8 0 bufpl 280 3381 0 123 233 0 233 233 0 8 0 anonpl 32 7117 0 0 58 0 58 58 0 246 0 amapchunkpl 152 17860 0 17261 32 3 29 29 0 158 4 amappl16 200 2846 0 2822 14 3 11 14 0 8 7 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 115 0 104 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1317 0 1279 2 0 2 2 0 8 0 amappl11 160 50 0 39 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 98 0 87 1 0 1 1 0 8 0 amappl6 120 176 0 172 1 0 1 1 0 8 0 amappl5 112 118 0 112 1 0 1 1 0 8 0 amappl4 104 290 0 274 1 0 1 1 0 8 0 amappl3 96 2941 0 2828 4 0 4 4 0 8 1 amappl2 88 980 0 895 2 0 2 2 0 8 0 amappl1 80 10713 0 10055 14 0 14 14 0 8 0 amappl 88 4890 0 4691 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 13 0 2 1 0 1 1 0 8 0 uaddrrnd 24 714 0 676 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 714 0 676 1 0 1 1 0 8 0 vmmpekpl 168 7644 0 7612 2 0 2 2 0 8 0 vmmpepl 168 52592 0 50341 109 0 109 109 0 357 1 vmsppl 488 713 0 676 7 1 6 6 0 8 0 rwobjpl 80 19424 0 16381 66 0 66 66 0 8 2 pdppl 4096 1435 0 1352 115 30 85 95 0 8 2 pvpl 32 15386 0 0 125 0 125 125 0 265 0 pmappl 256 713 0 676 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 389 0 33 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83823ff0) 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(ffffffff83876168) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83876168) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff800036831380,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7afeef05f190, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83823ff0) 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(ffffffff83876168) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83876168) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff800036831380,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7afeef05f190, 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(ffffffff8336926c) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839b92e0,2,ffff80003703d508) at pool_do_get+0x5df pool_get(ffffffff839b92e0,2) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003b061a20,ffff80003703d760,34,ffff80003703d6b0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003b061a20,ffff80003703d760,ffff80003703d6b0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003703d760) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003703d760) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdbc283c1da0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336926c) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839b92e0,2,ffff80003703d508) at pool_do_get+0x5df pool_get(ffffffff839b92e0,2) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003b061a20,ffff80003703d760,34,ffff80003703d6b0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003b061a20,ffff80003703d760,ffff80003703d6b0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003703d760) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003703d760) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdbc283c1da0, count: -8