panic: pool_do_get: shmpl free list modified: page 0xfffffd8066105000; item addr 0xfffffd80661050e0; offset 0x40=0xf4becc86 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 211406 56558 0 0 0 0 syz-executor * 8549 24503 0 0 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d4fdb) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839e45e8,1,ffff80003c43af58) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839e45e8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000327f4558,ffff80003c43b1b0,186,ffff80003c43b100) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000327f4558,ffff80003c43b1b0,ffff80003c43b100) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c43b1b0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c43b1b0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x814a5542880, 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 0xfffffd8066105000; item addr 0xfffffd80661050e0; offset 0x40=0xf4becc86 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d4fdb) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839e45e8,1,ffff80003c43af58) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839e45e8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000327f4558,ffff80003c43b1b0,186,ffff80003c43b100) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000327f4558,ffff80003c43b1b0,ffff80003c43b100) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c43b1b0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c43b1b0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x814a5542880, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c43ad90 rbx 0xffff8000299dedd7 rdx 0 rcx 0xffff8000327f4558 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4a8db07011a12cc9 r11 0x937d5b916c1b5ea1 r12 0xffff8000299debd8 r13 0 r14 0 r15 0x1 rip 0xffffffff830c3575 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c43ad80 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=8549 pid=24503 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000327f47e8,0xffff8000327f4048 process=0xffff80003c4c1d38 user=0xffff80003c436000, vmspace=0xfffffd8071fc8b58 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 56558 211406 52755 0 7 0 syz-executor 56558 58882 52755 0 2 0x4000000 syz-executor 76502 486429 0 0 3 0x14200 acct acct 24503 48535 54945 0 2 0 syz-executor *24503 8549 54945 0 7 0x4000000 syz-executor 24503 291552 54945 0 2 0x4000000 syz-executor 55535 356138 89460 0 2 0 syz-executor 55535 281894 89460 0 2 0x4000000 syz-executor 4388 195758 16203 0 3 0x90 nanoslp syz-executor 4388 366562 16203 0 3 0x4000090 fifow syz-executor 4388 93685 16203 0 3 0x4000090 fsleep syz-executor 79246 472571 0 0 3 0x14280 nfsidl nfsio 13634 472556 0 0 3 0x14280 nfsidl nfsio 36895 234535 0 0 3 0x14280 nfsidl nfsio 36735 254076 0 0 3 0x14280 nfsidl nfsio 95172 156395 0 0 3 0x14280 nfsidl nfsio 26775 232975 0 0 3 0x14280 nfsidl nfsio 59478 197132 0 0 3 0x14280 nfsidl nfsio 81647 337465 0 0 3 0x14280 nfsidl nfsio 67654 260607 0 0 3 0x14280 nfsidl nfsio 95068 487700 0 0 3 0x14280 nfsidl nfsio 25675 216421 0 0 3 0x14280 nfsidl nfsio 64712 460121 0 0 3 0x14280 nfsidl nfsio 11622 249574 0 0 3 0x14280 nfsidl nfsio 35967 340929 0 0 3 0x14280 nfsidl nfsio 49547 38353 0 0 3 0x14280 nfsidl nfsio 49472 260254 0 0 3 0x14280 nfsidl nfsio 40166 442559 0 0 3 0x14280 nfsidl nfsio 10759 186465 0 0 3 0x14280 nfsidl nfsio 90859 254989 0 0 3 0x14280 nfsidl nfsio 47996 9659 0 0 3 0x14280 nfsidl nfsio 36938 225639 1 0 3 0x80 nanoslp init 26843 299735 0 0 3 0x14200 bored sosplice 99794 107959 11416 0 3 0x100082 sbwait arp 11416 289002 95280 0 3 0x10008a sigsusp sh 83783 455272 94930 0 3 0x100082 sbwait arp 94930 463806 35825 0 3 0x10008a sigsusp sh 54945 437515 55246 0 3 0x82 nanoslp syz-executor 11760 463254 55246 0 3 0x2 biowait syz-executor 52755 355176 55246 0 3 0x82 nanoslp syz-executor 16203 508462 55246 0 3 0x82 nanoslp syz-executor 89460 335050 55246 0 3 0x82 nanoslp syz-executor 46505 217809 55246 0 3 0x82 nanoslp syz-executor 95280 155288 55246 0 3 0x82 wait syz-executor 35825 38131 55246 0 3 0x82 wait syz-executor 55246 229910 94224 0 2 0x2 syz-executor 94224 303106 98881 0 3 0x10008a sigsusp ksh 98881 159851 35553 0 3 0x98 kqread sshd-session 35553 363493 40278 0 3 0x92 kqread sshd-session 40278 197701 1 0 3 0x88 kqread sshd 99780 461971 93860 74 3 0x1100092 bpf pflogd 93860 503071 1 0 3 0x80 sbwait pflogd 1254 227885 84671 73 3 0x1100090 kqread syslogd 84671 424779 1 0 3 0x100082 sbwait syslogd 15062 274127 1 0 3 0x100080 kqread resolvd 42424 159709 88020 77 3 0x100092 kqread dhcpleased 54039 483165 88020 77 3 0x100092 kqread dhcpleased 88020 145674 1 0 3 0x80 kqread dhcpleased 18592 452589 0 0 3 0x14200 bored smr 12655 101740 0 0 2 0x14200 zerothread 43461 372596 0 0 3 0x14200 aiodoned aiodoned 13431 210445 0 0 3 0x14200 syncer update 87875 274234 0 0 3 0x14200 cleaner cleaner 99322 83028 0 0 3 0x14200 reaper reaper 40418 173464 0 0 3 0x14200 pgdaemon pagedaemon 18973 219050 0 0 3 0x14200 bored viomb 68993 92145 0 0 3 0x40014200 acpi0 acpi0 96814 483590 0 0 3 0x40014200 idle1 92404 283945 0 0 3 0x14200 bored softnet3 42041 133172 0 0 3 0x14200 bored softnet2 13603 127114 0 0 3 0x14200 bored softnet1 70797 160118 0 0 2 0x14200 softnet0 78880 308935 0 0 3 0x14200 bored systqmp 3134 253255 0 0 3 0x14200 bored systq 47864 138167 0 0 3 0x14200 tmoslp softclockmp 49368 185064 0 0 3 0x40014200 tmoslp softclock 60354 113404 0 0 3 0x40014200 idle0 1 367576 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex shmpl r = 0 (0xffffffff839e4600) #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:748 #7 Xsyscall+0x128 Process 24503 (syz-executor) thread 0xffff8000327f4558 (8549) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83908068) #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:748 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839e4600) #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:748 #7 Xsyscall+0x128 Process 11760 (syz-executor) thread 0xffff8000ffffd718 (463254) exclusive rrwlock inode r = 0 (0xfffffd806d0087a0) #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:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c951f78) #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:748 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 11166K 13757K 166960K 13723 0 pcb 17 13K 14K 166960K 228 0 rtable 220 10K 11K 166960K 455 0 pf 34 17K 81K 166960K 94 0 ifaddr 37 6K 6K 166960K 71 0 ifgroup 55 2K 2K 166960K 109 0 sysctl 4 1K 9K 166960K 10 0 counters 68 36K 37K 166960K 132 0 ioctlops 0 0K 4K 166960K 1771 0 iov 0 0K 20K 166960K 88 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1595 100K 101K 166960K 2518 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 13 10K 10K 166960K 133 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 97K 166960K 942 0 sigio 0 0K 0K 166960K 9 0 proc 63 79K 140K 166960K 614 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 114 0 in_multi 75 5K 5K 166960K 100 0 ether_multi 1 0K 0K 166960K 9 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 487 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 236 159K 177K 166960K 10816 0 UVM aobj 21 2K 2K 166960K 23 0 pinsyscall 45 90K 108K 166960K 2007 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 89 0 NDP 12 0K 1K 166960K 45 0 temp 59 8679K 8798K 166960K 46074 0 kqueue 13 20K 31K 166960K 224 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 120 147 0 142 1 0 1 1 0 8 0 rtentry 176 120 0 34 5 0 5 5 0 8 0 unpcb 144 851 0 832 10 8 2 10 0 8 1 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 312 0 308 12 9 3 7 0 8 2 arp 128 20 0 4 1 0 1 1 0 8 0 inpcb 328 1023 0 1013 12 7 5 7 0 8 3 nd6 144 21 0 0 1 0 1 1 0 8 0 pkpcb 40 42 0 42 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 1 1 1 0 8 1 ppxss 1192 29 0 29 1 0 1 1 0 8 1 pppxif 1504 2 0 2 1 1 0 1 0 8 0 pffrag 232 8 0 3 1 0 1 1 0 482 0 pffrnode 88 8 0 3 1 0 1 1 0 8 0 pffrent 40 13 0 7 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 73 0 17 1 0 1 1 0 8 0 pfstkey 128 73 0 17 2 0 2 2 0 8 0 pfstate 384 73 0 17 6 0 6 6 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 508 0 163 26 3 23 24 0 8 0 art_table 40 512 0 163 4 0 4 4 0 8 0 art_node 32 120 0 42 1 0 1 1 0 8 0 sysvmsgpl 40 74 0 71 1 0 1 1 0 8 0 semapl 112 127 0 116 1 0 1 1 0 8 0 shmpl 112 20 0 2 1 0 1 1 0 8 0 pool(0xffffffff839e45e8:shmpl): page inconsistency: page 0xfffffd8066105000; 16 on list, 18 missing, 35 items per page dirhash 1024 32 0 15 3 0 3 3 0 8 0 dino2pl 256 3210 0 1704 95 0 95 95 0 8 0 ffsino 288 3210 0 1704 109 0 109 109 0 8 0 nchpl 144 4541 0 2854 63 0 63 63 0 8 0 rtmask 32 4 0 4 1 0 1 1 0 8 1 uvmvnodes 80 4114 0 0 84 0 84 84 0 8 0 vnodes 216 4114 0 0 229 0 229 229 0 8 0 namei 1024 15413 0 15412 1 0 1 1 0 8 0 percpumem 16 81 0 32 1 0 1 1 0 8 0 kstatmem 264 68 0 42 4 1 3 3 0 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 29902 0 29901 9 8 1 8 1 8 0 plimitpl 152 131 0 115 1 0 1 1 0 8 0 sigapl 424 1267 0 1194 9 0 9 9 0 8 0 knotepl 120 428 0 0 13 0 13 13 0 8 0 kqueuepl 224 412 0 402 6 1 5 5 0 8 4 pipepl 336 178 0 151 3 0 3 3 0 8 0 fdescpl 520 1224 0 1191 3 0 3 3 0 8 0 filepl 160 7983 0 7765 22 9 13 20 0 8 3 lockfpl 104 697 0 694 3 2 1 2 0 8 0 lockfspl 48 249 0 246 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 46 0 30 1 0 1 1 0 8 0 ucredpl 104 1039 0 1025 1 0 1 1 0 8 0 zombiepl 144 1195 0 1194 1 0 1 1 0 8 0 processpl 1240 1267 0 1194 6 0 6 6 0 8 0 procpl 656 2740 0 2661 8 0 8 8 0 8 0 sosppl 168 10 0 10 1 0 1 1 0 8 1 sockpl 728 2077 0 2043 28 19 9 26 0 8 5 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 109 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 46 0 0 5 0 5 5 0 8 0 mtagpl 96 65 0 0 2 0 2 2 0 8 0 mbufpl 256 1215 0 0 76 0 76 76 0 8 0 bufpl 280 13176 0 7034 440 0 440 440 0 8 0 anonpl 32 13473 0 0 109 0 109 109 0 246 0 amapchunkpl 152 37038 0 36583 35 4 31 32 0 158 11 amappl16 200 5368 0 5340 48 37 11 30 0 8 7 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 112 0 99 1 0 1 1 0 8 0 amappl12 168 1854 0 1819 4 1 3 3 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 310 0 309 1 0 1 1 0 8 0 amappl8 136 57 0 55 1 0 1 1 0 8 0 amappl7 128 104 0 91 1 0 1 1 0 8 0 amappl6 120 177 0 172 1 0 1 1 0 8 0 amappl5 112 127 0 116 1 0 1 1 0 8 0 amappl4 104 313 0 293 1 0 1 1 0 8 0 amappl3 96 6849 0 6742 5 1 4 4 0 8 0 amappl2 88 622 0 556 2 0 2 2 0 8 0 amappl1 80 11477 0 10852 15 0 15 15 0 8 0 amappl 88 10000 0 9843 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 22 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1224 0 1191 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1224 0 1191 1 0 1 1 0 8 0 vmmpekpl 168 11197 0 11161 3 0 3 3 0 8 0 vmmpepl 168 82941 0 80931 117 11 106 114 0 357 12 vmsppl 480 1223 0 1191 5 0 5 5 0 8 0 rwobjpl 72 28465 0 23368 93 0 93 93 0 8 0 pdppl 4096 2455 0 2382 99 24 75 87 0 8 2 pvpl 32 20903 0 0 169 0 169 169 0 265 0 pmappl 256 1223 0 1191 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 460 0 41 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83882ff0) 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(ffffffff83907e60) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83907e60) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c41b7e0,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: 0x7362777191e0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83882ff0) 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(ffffffff83907e60) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83907e60) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c41b7e0,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: 0x7362777191e0, 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(ffffffff833d4fdb) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839e45e8,1,ffff80003c43af58) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839e45e8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000327f4558,ffff80003c43b1b0,186,ffff80003c43b100) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000327f4558,ffff80003c43b1b0,ffff80003c43b100) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c43b1b0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c43b1b0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x814a5542880, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d4fdb) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839e45e8,1,ffff80003c43af58) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839e45e8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000327f4558,ffff80003c43b1b0,186,ffff80003c43b100) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000327f4558,ffff80003c43b1b0,ffff80003c43b100) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c43b1b0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c43b1b0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x814a5542880, count: -8