panic: pool_do_get: shmpl free list modified: page 0xfffffd806bf8b000; item addr 0xfffffd806bf8ba80; offset 0x40=0x67a8d878 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 287140 34015 32767 0x10 0 0 syz-executor * 35353 32478 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a3b3a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839c0628,1,ffff80002a3edb98) at pool_do_get+0x5da pool_get(ffffffff839c0628,1) at pool_get+0x149 shmget_allocate_segment(ffff80003c5667c8,ffff80002a3eddf0,0,ffff80002a3edd40) at shmget_allocate_segment+0x1a7 sys_shmget(ffff80003c5667c8,ffff80002a3eddf0,ffff80002a3edd40) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a3eddf0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3eddf0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb63aa3b9740, 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 0xfffffd806bf8b000; item addr 0xfffffd806bf8ba80; offset 0x40=0x67a8d878 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a3b3a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839c0628,1,ffff80002a3edb98) at pool_do_get+0x5da pool_get(ffffffff839c0628,1) at pool_get+0x149 shmget_allocate_segment(ffff80003c5667c8,ffff80002a3eddf0,0,ffff80002a3edd40) at shmget_allocate_segment+0x1a7 sys_shmget(ffff80003c5667c8,ffff80002a3eddf0,ffff80002a3edd40) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a3eddf0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3eddf0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb63aa3b9740, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a3ed9d0 rbx 0xffff800029aacdc7 rdx 0 rcx 0xffff80003c5667c8 rax 0xffff800029aabff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x107c8ab9306700da r11 0xb8aa29f35efc34cc r12 0xffff800029aacbc8 r13 0 r14 0 r15 0x1 rip 0xffffffff81eeb8d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a3ed9c0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=35353 pid=32478 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=70, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c5662b8,0xffff80003c566550 process=0xffff80003b4fe020 user=0xffff80002a3e8000, vmspace=0xfffffd8069c35918 estcpu=20, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34015 287140 45786 32767 7 0x10 syz-executor 34015 204080 45786 32767 3 0x4000010 biowait syz-executor 34248 520231 4754 32767 2 0x10 syz-executor 34248 67195 4754 32767 2 0x4000010 syz-executor 34248 521622 4754 32767 2 0x4000010 syz-executor 32478 282803 56655 32767 2 0x10 syz-executor *32478 35353 56655 32767 7 0x4000010 syz-executor 32478 338481 56655 32767 3 0x4000090 fsleep syz-executor 58042 134545 12539 32767 3 0x90 nanoslp syz-executor 58042 279512 12539 32767 3 0x4000090 kqread syz-executor 58042 504264 12539 32767 3 0x4000090 fsleep syz-executor 13665 266335 0 0 3 0x14200 bored sosplice 86371 490014 45311 0 3 0x100082 sbwait arp 45311 218281 39780 0 3 0x10008a sigsusp sh 45786 388503 83660 32767 3 0x90 nanoslp syz-executor 4754 425841 5617 32767 3 0x90 nanoslp syz-executor 56655 31391 97709 32767 3 0x90 nanoslp syz-executor 39780 416210 83726 0 3 0x80 wait syz-executor 38642 412741 75503 32767 3 0x10 biowait syz-executor 31986 447154 2764 32767 3 0x90 nanoslp syz-executor 12539 332055 25029 32767 3 0x90 nanoslp syz-executor 83660 493603 13490 0 3 0x82 wait syz-executor 75503 195122 13490 0 3 0x82 wait syz-executor 2764 303305 13490 0 3 0x82 wait syz-executor 25029 327438 13490 0 3 0x82 wait syz-executor 5617 415349 13490 0 3 0x82 wait syz-executor 97709 313328 13490 0 3 0x82 wait syz-executor 83726 394421 13490 0 3 0x82 wait syz-executor 13490 237729 38667 0 3 0x82 nanoslp syz-executor 38667 437580 35453 0 3 0x10008a sigsusp ksh 35453 46826 30312 0 3 0x98 kqread sshd-session 30312 507242 74779 0 3 0x92 kqread sshd-session 60966 261489 1 0 3 0x100083 ttyin getty 74779 332705 1 0 3 0x88 kqread sshd 30552 422034 57750 73 3 0x1100090 kqread syslogd 57750 331932 1 0 3 0x100082 sbwait syslogd 33846 293681 1 0 3 0x100080 kqread resolvd 50286 470025 9307 77 3 0x100092 kqread dhcpleased 89306 272463 9307 77 3 0x100092 kqread dhcpleased 9307 456696 1 0 3 0x80 kqread dhcpleased 23001 177512 0 0 3 0x14200 bored smr 93711 55909 0 0 2 0x14200 zerothread 90562 200833 0 0 3 0x14200 aiodoned aiodoned 99460 10692 0 0 3 0x14200 syncer update 62761 316232 0 0 3 0x14200 cleaner cleaner 25916 79624 0 0 3 0x14200 reaper reaper 66803 466616 0 0 3 0x14200 pgdaemon pagedaemon 93696 447558 0 0 3 0x14200 bored viomb 82475 217418 0 0 3 0x40014200 acpi0 acpi0 23761 455738 0 0 3 0x40014200 idle1 73545 333129 0 0 3 0x14200 bored softnet3 7606 72762 0 0 3 0x14200 bored softnet2 94365 195627 0 0 3 0x14200 bored softnet1 56849 268482 0 0 3 0x14200 bored softnet0 61078 42026 0 0 3 0x14200 bored systqmp 73447 391222 0 0 3 0x14200 bored systq 21305 83313 0 0 3 0x14200 tmoslp softclockmp 36534 140063 0 0 3 0x40014200 tmoslp softclock 32895 13987 0 0 3 0x40014200 idle0 1 296708 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 (0xffffffff839c0640) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x10b sys/kern/subr_pool.c:583 #4 shmget_allocate_segment+0x1a7 #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:577 #7 Xsyscall+0x128 Process 34015 (syz-executor) thread 0xffff80002a437968 (204080) exclusive rrwlock inode r = 0 (0xfffffd8069aafed8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #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:3102 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c0640e0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #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:3087 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 32478 (syz-executor) thread 0xffff80003c5667c8 (35353) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838a1ce0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839c0640) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x10b sys/kern/subr_pool.c:583 #4 shmget_allocate_segment+0x1a7 #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:577 #7 Xsyscall+0x128 Process 38642 (syz-executor) thread 0xffff80002a4371d0 (412741) exclusive rrwlock inode r = 0 (0xfffffd8069aafa78) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #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:3102 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c68cdf8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #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:3087 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 10955K 10966K 166960K 11290 0 pcb 17 12K 12K 166960K 17 0 rtable 202 5K 6K 166960K 338 0 pf 29 16K 16K 166960K 31 0 ifaddr 36 6K 7K 166960K 42 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 1 1K 1K 166960K 1 0 counters 62 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 12K 166960K 43 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1333 84K 84K 166960K 1439 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 16 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 23 85K 121K 166960K 328 0 sigio 0 0K 0K 166960K 1 0 proc 58 79K 127K 166960K 497 0 subproc 63 3K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 38 0 in_multi 78 5K 6K 166960K 99 0 ether_multi 1 0K 0K 166960K 4 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 205 917K 917K 166960K 205 0 exec 0 0K 1K 166960K 390 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 216 68K 88K 166960K 4336 0 UVM aobj 9 2K 2K 166960K 11 0 pinsyscall 45 90K 117K 166960K 1311 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 10 0K 1K 166960K 25 0 temp 47 8634K 8698K 166960K 4427 0 kqueue 13 20K 27K 166960K 55 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 50 0 46 1 0 1 1 0 8 0 rtentry 112 107 0 13 4 0 4 4 0 8 0 unpcb 144 245 0 230 4 0 4 4 0 8 3 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 808 160 0 156 7 0 7 7 0 8 6 arp 120 17 0 2 1 0 1 1 0 8 0 inpcb 376 391 0 380 8 0 8 8 0 8 6 nd6 136 25 0 4 1 0 1 1 0 8 0 kcovpl 48 13 0 6 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 420 0 46 27 0 27 27 0 8 0 art_table 32 421 0 46 4 0 4 4 0 8 0 art_node 16 106 0 20 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 13 0 3 1 0 1 1 0 8 0 shmpl 112 8 0 2 1 0 1 1 0 8 0 pool(0xffffffff839c0628:shmpl): page inconsistency: page 0xfffffd806bf8b000; 28 on list, 6 missing, 35 items per page dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1834 0 321 95 0 95 95 0 8 0 ffsino 280 1834 0 321 109 0 109 109 0 8 0 nchpl 144 2276 0 596 63 0 63 63 0 8 0 uvmvnodes 80 1960 0 0 40 0 40 40 0 8 0 vnodes 216 1960 0 0 109 0 109 109 0 8 0 namei 1024 7342 0 7340 2 0 2 2 0 8 1 percpumem 16 46 0 1 1 0 1 1 0 8 0 kstatmem 264 22 0 2 2 0 2 2 0 8 0 scxspl 216 7678 0 7676 2 1 1 2 1 8 0 plimitpl 152 177 0 155 2 0 2 2 0 8 1 sigapl 424 589 0 535 7 0 7 7 0 8 0 futexpl 64 2752 0 2750 1 0 1 1 0 8 0 knotepl 120 315 0 0 10 0 10 10 0 8 0 kqueuepl 216 65 0 54 1 0 1 1 0 8 0 pipepl 328 129 0 102 3 0 3 3 0 8 0 fdescpl 504 570 0 535 7 1 6 6 0 8 0 filepl 152 3331 0 3127 12 0 12 12 0 8 3 lockfpl 104 53 0 51 1 0 1 1 0 8 0 lockfspl 48 22 0 20 1 0 1 1 0 8 0 sessionpl 144 26 0 11 1 0 1 1 0 8 0 pgrppl 48 39 0 17 1 0 1 1 0 8 0 ucredpl 104 537 0 520 1 0 1 1 0 8 0 zombiepl 144 536 0 535 1 0 1 1 0 8 0 processpl 1168 589 0 535 5 0 5 5 0 8 0 procpl 648 905 0 844 7 0 7 7 0 8 0 sosppl 168 3 0 3 1 0 1 1 0 8 1 sockpl 688 688 0 658 9 0 9 9 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 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 216 0 0 15 1 14 15 0 8 0 bufpl 280 2769 0 121 190 0 190 190 0 8 0 anonpl 24 111114 0 107961 56 1 55 55 0 184 31 amapchunkpl 152 13918 0 13456 32 0 32 32 0 158 9 amappl16 200 2136 0 2117 16 4 12 15 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 97 0 86 1 0 1 1 0 8 0 amappl13 176 13 0 13 2 2 0 1 0 8 0 amappl12 168 1161 0 1126 2 0 2 2 0 8 0 amappl11 160 75 0 65 1 0 1 1 0 8 0 amappl10 152 20 0 20 2 2 0 1 0 8 0 amappl9 144 284 0 284 1 1 0 1 0 8 0 amappl8 136 20 0 18 1 0 1 1 0 8 0 amappl7 128 89 0 78 1 0 1 1 0 8 0 amappl6 120 167 0 162 1 0 1 1 0 8 0 amappl5 112 112 0 106 1 0 1 1 0 8 0 amappl4 104 265 0 249 1 0 1 1 0 8 0 amappl3 96 2421 0 2312 4 0 4 4 0 8 0 amappl2 88 592 0 533 2 0 2 2 0 8 0 amappl1 80 7844 0 7284 14 0 14 14 0 8 0 amappl 88 3983 0 3818 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 10 0 2 1 0 1 1 0 8 0 uaddrrnd 24 571 0 536 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 571 0 536 1 0 1 1 0 8 0 vmmpekpl 168 6161 0 6114 3 0 3 3 0 8 0 vmmpepl 168 40754 0 38863 103 0 103 103 0 357 10 vmsppl 456 570 0 536 7 1 6 6 0 8 0 rwobjpl 64 15915 0 13109 48 0 48 48 0 8 1 pdppl 4096 1149 0 1072 107 24 83 95 0 8 6 pvpl 32 16694 0 0 136 1 135 135 0 265 0 pmappl 248 570 0 536 4 1 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 295 0 28 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8383aff0) 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(ffffffff838a1ad8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838a1ad8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003c533440,ffff800000079f00) 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: 0x74d74480e7d0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff8383aff0) 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(ffffffff838a1ad8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838a1ad8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003c533440,ffff800000079f00) 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: 0x74d74480e7d0, 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(ffffffff833a3b3a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839c0628,1,ffff80002a3edb98) at pool_do_get+0x5da pool_get(ffffffff839c0628,1) at pool_get+0x149 shmget_allocate_segment(ffff80003c5667c8,ffff80002a3eddf0,0,ffff80002a3edd40) at shmget_allocate_segment+0x1a7 sys_shmget(ffff80003c5667c8,ffff80002a3eddf0,ffff80002a3edd40) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a3eddf0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3eddf0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb63aa3b9740, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a3b3a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839c0628,1,ffff80002a3edb98) at pool_do_get+0x5da pool_get(ffffffff839c0628,1) at pool_get+0x149 shmget_allocate_segment(ffff80003c5667c8,ffff80002a3eddf0,0,ffff80002a3edd40) at shmget_allocate_segment+0x1a7 sys_shmget(ffff80003c5667c8,ffff80002a3eddf0,ffff80002a3edd40) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a3eddf0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3eddf0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb63aa3b9740, count: -8