panic: pool_do_get: shmpl free list modified: page 0xfffffd806c0cf000; item addr 0xfffffd806c0cfcb0; offset 0x40=0x687054e9 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 215276 40171 32767 0x10 0 0 syz-executor *147723 40171 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d95ef) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839956a0,1,ffff80002a3aa988) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839956a0,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe22b8,ffff80002a3aabe0,0,ffff80002a3aab30) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe22b8,ffff80002a3aabe0,ffff80002a3aab30) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a3aabe0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3aabe0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x479d9fba740, 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 0xfffffd806c0cf000; item addr 0xfffffd806c0cfcb0; offset 0x40=0x687054e9 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d95ef) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839956a0,1,ffff80002a3aa988) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839956a0,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe22b8,ffff80002a3aabe0,0,ffff80002a3aab30) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe22b8,ffff80002a3aabe0,ffff80002a3aab30) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a3aabe0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3aabe0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x479d9fba740, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a3aa7c0 rbx 0xffff8000299dedd7 rdx 0 rcx 0xffff8000fffe22b8 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x1375f671299627d7 r11 0x1723e4715cce4a72 r12 0xffff8000299debd8 r13 0 r14 0 r15 0x1 rip 0xffffffff819ecef5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a3aa7b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=147723 pid=40171 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe27d8,0xffff8000fffe2a78 process=0xffff8000fffe6208 user=0xffff80002a3a5000, vmspace=0xfffffd806c37dd48 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 40171 215276 90683 32767 7 0x10 syz-executor 40171 165100 90683 32767 2 0x4000010 syz-executor *40171 147723 90683 32767 7 0x4000010 syz-executor 40171 512073 90683 32767 3 0x4000090 fsleep syz-executor 24201 132691 21357 32767 2 0x10 syz-executor 24201 454457 21357 32767 3 0x4000090 fsleep syz-executor 43246 158591 30719 32767 2 0x10 syz-executor 43246 106979 30719 32767 3 0x4000090 ttyout syz-executor 85616 2903 77407 0 3 0x2 biowait syz-executor 23754 151649 0 0 3 0x14200 bored sosplice 30719 392789 16763 32767 3 0x90 nanoslp syz-executor 90683 506935 18298 32767 3 0x90 nanoslp syz-executor 21357 241931 59785 32767 3 0x90 nanoslp syz-executor 31067 365289 34915 32767 3 0x90 wait syz-executor 29385 322330 13897 32767 3 0x10 biowait syz-executor 96874 423691 229 32767 3 0x90 nanoslp syz-executor 229 505541 77407 0 3 0x82 wait syz-executor 13897 91451 77407 0 3 0x82 wait syz-executor 18298 392953 77407 0 3 0x82 wait syz-executor 59785 193409 77407 0 3 0x82 wait syz-executor 34915 334635 77407 0 3 0x82 wait syz-executor 16763 417813 77407 0 3 0x82 wait syz-executor 77407 410242 82804 0 3 0x82 nanoslp syz-executor 82804 179777 57482 0 3 0x10008a sigsusp ksh 57482 386824 85848 0 3 0x98 kqread sshd-session 85848 454479 87538 0 3 0x92 kqread sshd-session 21571 334576 1 0 3 0x100083 ttyin getty 87538 316674 1 0 3 0x88 kqread sshd 47897 306688 19170 73 3 0x1100090 kqread syslogd 19170 443648 1 0 3 0x100082 sbwait syslogd 317 367692 1 0 3 0x100080 kqread resolvd 91465 209560 87491 77 3 0x100092 kqread dhcpleased 27972 397802 87491 77 3 0x100092 kqread dhcpleased 87491 399234 1 0 3 0x80 kqread dhcpleased 74978 391952 0 0 3 0x14200 bored smr 45067 272704 0 0 2 0x14200 zerothread 52340 472375 0 0 3 0x14200 aiodoned aiodoned 14231 281398 0 0 3 0x14200 syncer update 18420 343966 0 0 3 0x14200 cleaner cleaner 59504 51614 0 0 3 0x14200 reaper reaper 40736 7414 0 0 3 0x14200 pgdaemon pagedaemon 45351 130901 0 0 3 0x14200 bored viomb 39468 311629 0 0 3 0x40014200 acpi0 acpi0 46705 93305 0 0 3 0x40014200 idle1 56159 340207 0 0 3 0x14200 bored softnet3 76287 443788 0 0 3 0x14200 bored softnet2 91242 304615 0 0 3 0x14200 bored softnet1 24293 235252 0 0 3 0x14200 bored softnet0 88381 486857 0 0 3 0x14200 bored systqmp 76606 229626 0 0 3 0x14200 bored systq 35064 188791 0 0 3 0x14200 tmoslp softclockmp 94658 292578 0 0 3 0x40014200 tmoslp softclock 35266 423118 0 0 3 0x40014200 idle0 1 85476 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 (0xffffffff839956b8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb 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+0x10b sys/kern/subr_pool.c:578 #4 shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 #7 Xsyscall+0x128 Process 40171 (syz-executor) thread 0xffff8000fffe22b8 (147723) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83995660) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:742 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839956b8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb 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+0x10b sys/kern/subr_pool.c:578 #4 shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 #7 Xsyscall+0x128 Process 85616 (syz-executor) thread 0xffff8000fffe3c58 (2903) exclusive rrwlock inode r = 0 (0xfffffd806bd239a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 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+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3109 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806f45c1f0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3094 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 #9 Xsyscall+0x128 Process 29385 (syz-executor) thread 0xffff8000ffff02a8 (322330) exclusive rrwlock inode r = 0 (0xfffffd806c899af8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 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+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3109 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c899e58) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3094 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10191 10952K 10967K 166960K 11275 0 pcb 17 12K 12K 166960K 17 0 rtable 193 5K 7K 166960K 359 0 pf 27 16K 16K 166960K 31 0 ifaddr 34 6K 7K 166960K 44 0 ifgroup 42 1K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 64 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 12K 166960K 8 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1486 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 22 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 20 70K 125K 166960K 327 0 sigio 0 0K 0K 166960K 4 0 proc 58 79K 115K 166960K 487 0 subproc 54 3K 4K 166960K 198 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 91 0 in_multi 77 5K 7K 166960K 105 0 ether_multi 1 0K 0K 166960K 2 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 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 372 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 221 143K 177K 166960K 4333 0 UVM aobj 6 2K 3K 166960K 8 0 pinsyscall 41 82K 110K 166960K 1376 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 11 0 NDP 9 0K 2K 166960K 27 0 temp 31 8670K 8735K 166960K 4611 0 kqueue 13 20K 30K 166960K 54 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 50 0 47 1 0 1 1 0 8 0 rtentry 176 111 0 23 5 0 5 5 0 8 0 unpcb 144 136 0 121 1 0 1 1 0 8 0 syncache 336 8 0 8 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 61 0 55 2 0 2 2 0 8 1 arp 128 18 0 4 1 0 1 1 0 8 0 ipq 40 2 0 1 1 0 1 1 0 8 0 ipqe 40 3 0 2 1 0 1 1 0 8 0 inpcb 328 186 0 176 3 0 3 3 0 8 1 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 24 0 6 1 0 1 1 0 8 0 kcovpl 48 22 0 16 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 88 29 0 29 29 0 8 2 art_table 40 453 0 88 5 0 5 5 0 8 0 art_node 32 111 0 31 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 1 1 0 1 1 0 8 0 semapl 112 20 0 10 1 0 1 1 0 8 0 shmpl 112 5 0 2 1 0 1 1 0 8 0 pool(0xffffffff839956a0:shmpl): page inconsistency: page 0xfffffd806c0cf000; 31 on list, 3 missing, 35 items per page dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 1754 0 231 96 0 96 96 0 8 0 ffsino 288 1754 0 231 109 0 109 109 0 8 0 nchpl 144 2117 0 425 63 0 63 63 0 8 0 uvmvnodes 80 1961 0 0 41 0 41 41 0 8 0 vnodes 216 1961 0 0 109 0 109 109 0 8 0 namei 1024 6859 0 6857 2 0 2 2 0 8 1 percpumem 16 49 0 2 1 0 1 1 0 8 0 kstatmem 264 24 0 4 2 0 2 2 0 8 0 scxspl 216 7077 0 7075 3 2 1 2 1 8 0 plimitpl 152 82 0 60 2 0 2 2 0 8 1 sigapl 424 584 0 533 8 0 8 8 0 8 0 knotepl 120 115 0 0 4 0 4 4 0 8 0 kqueuepl 224 125 0 116 5 0 5 5 0 8 4 pipepl 336 155 0 127 3 0 3 3 0 8 0 fdescpl 520 565 0 533 4 0 4 4 0 8 0 filepl 160 2592 0 2401 13 0 13 13 0 8 3 lockfpl 104 203 0 201 2 0 2 2 0 8 1 lockfspl 48 17 0 15 1 0 1 1 0 8 0 sessionpl 144 40 0 26 1 0 1 1 0 8 0 pgrppl 48 67 0 46 1 0 1 1 0 8 0 ucredpl 104 270 0 253 1 0 1 1 0 8 0 zombiepl 144 535 0 533 1 0 1 1 0 8 0 processpl 1240 584 0 533 5 0 5 5 0 8 0 procpl 656 825 0 769 7 0 7 7 0 8 1 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 728 374 0 346 5 0 5 5 0 8 1 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 0 16 16 0 8 1 mcl2k2 2112 1 0 0 1 0 1 1 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 1185 0 0 75 0 75 75 0 8 0 bufpl 280 2618 0 116 179 0 179 179 0 8 0 anonpl 32 5520 0 0 45 0 45 45 0 246 0 amapchunkpl 152 12305 0 11847 31 0 31 31 0 158 7 amappl16 200 920 0 903 4 2 2 3 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 108 0 98 1 0 1 1 0 8 0 amappl13 176 6 0 6 2 1 1 1 0 8 1 amappl12 168 1178 0 1147 2 0 2 2 0 8 0 amappl11 160 41 0 31 1 0 1 1 0 8 0 amappl9 144 280 0 280 1 1 0 1 0 8 0 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 95 0 85 1 0 1 1 0 8 0 amappl6 120 214 0 211 1 0 1 1 0 8 0 amappl5 112 112 0 105 1 0 1 1 0 8 0 amappl4 104 293 0 278 1 0 1 1 0 8 0 amappl3 96 2168 0 2062 4 0 4 4 0 8 0 amappl2 88 642 0 588 2 0 2 2 0 8 0 amappl1 80 9664 0 9110 16 0 16 16 0 8 1 amappl 88 3635 0 3477 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 7 0 2 1 0 1 1 0 8 0 uaddrrnd 24 565 0 533 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 565 0 533 1 0 1 1 0 8 0 vmmpekpl 168 6893 0 6849 3 0 3 3 0 8 0 vmmpepl 168 42198 0 40332 106 0 106 106 0 357 11 vmsppl 480 564 0 533 7 1 6 6 0 8 1 rwobjpl 72 15447 0 12692 51 0 51 51 0 8 0 pdppl 4096 1137 0 1066 117 36 81 97 0 8 10 pvpl 32 13038 0 0 106 0 106 106 0 265 0 pmappl 256 564 0 533 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 467 0 39 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838b7ff0) 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(ffffffff83995458) at __mp_lock+0x190 __mp_lock_spin sys/kern/kern_lock.c:135 [inline] __mp_lock(ffffffff83995458) at __mp_lock+0x190 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3b0cb0,ffff800000079a80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x750d82b85c60, count: 9 ddb{0}> trace x86_ipi_db(ffffffff838b7ff0) 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(ffffffff83995458) at __mp_lock+0x190 __mp_lock_spin sys/kern/kern_lock.c:135 [inline] __mp_lock(ffffffff83995458) at __mp_lock+0x190 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3b0cb0,ffff800000079a80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x750d82b85c60, 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(ffffffff833d95ef) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839956a0,1,ffff80002a3aa988) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839956a0,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe22b8,ffff80002a3aabe0,0,ffff80002a3aab30) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe22b8,ffff80002a3aabe0,ffff80002a3aab30) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a3aabe0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3aabe0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x479d9fba740, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d95ef) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839956a0,1,ffff80002a3aa988) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839956a0,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe22b8,ffff80002a3aabe0,0,ffff80002a3aab30) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe22b8,ffff80002a3aabe0,ffff80002a3aab30) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a3aabe0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3aabe0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x479d9fba740, count: -8