panic: pool_do_get: shmpl free list modified: page 0xfffffd806b74a000; item addr 0xfffffd806b74a460; offset 0x40=0x6921f4ce Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 30726 74167 32767 0x10 0x4000000 0 syz-executor *370736 74167 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a44c3) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83951698,1,ffff80003c471fb8) at pool_do_get+0x5df pool_get(ffffffff83951698,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffeda10,ffff80003c472210,91,ffff80003c472160) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffeda10,ffff80003c472210,ffff80003c472160) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c472210) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c472210) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xedeb7ac7b40, 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 0xfffffd806b74a000; item addr 0xfffffd806b74a460; offset 0x40=0x6921f4ce ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a44c3) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83951698,1,ffff80003c471fb8) at pool_do_get+0x5df pool_get(ffffffff83951698,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffeda10,ffff80003c472210,91,ffff80003c472160) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffeda10,ffff80003c472210,ffff80003c472160) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c472210) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c472210) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xedeb7ac7b40, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c471de0 rbx 0xffff8000299eee07 rdx 0 rcx 0xffff8000fffeda10 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x30a6959d1e0fda4b r11 0x8f4e50ec7aa54304 r12 0xffff8000299eec08 r13 0 r14 0 r15 0x1 rip 0xffffffff8188ba15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c471dd0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=370736 pid=74167 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=0xffff8000fffec2b8,0xffffffff83950828 process=0xffff8000fffea6a0 user=0xffff80003c46d000, vmspace=0xfffffd806cc9b3f8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74167 495207 41620 32767 2 0x10 syz-executor 74167 30726 41620 32767 7 0x4000010 syz-executor 74167 347668 41620 32767 2 0x4000090 syz-executor *74167 370736 41620 32767 7 0x4000010 syz-executor 36944 272516 24624 32767 3 0x90 nanoslp syz-executor 36944 485268 24624 32767 3 0x4000090 ttyout syz-executor 36944 335959 24624 32767 3 0x4000090 ttyout syz-executor 36944 488680 24624 32767 3 0x4000090 fsleep syz-executor 84753 373124 91667 32767 3 0x90 nanoslp syz-executor 84753 431667 91667 32767 3 0x4000090 kqsel syz-executor 84753 379008 91667 32767 3 0x4000090 fsleep syz-executor 65669 259492 12738 32767 3 0x90 nanoslp syz-executor 65669 302353 12738 32767 3 0x4000090 ttyin syz-executor 65669 501489 12738 32767 3 0x4000090 fsleep syz-executor 1285 304258 22881 32767 3 0x90 nanoslp syz-executor 1285 519770 22881 32767 3 0x4000090 kqsel syz-executor 1285 454353 22881 32767 3 0x4000090 lockf syz-executor 1285 355801 22881 32767 3 0x4000090 fsleep syz-executor 92094 60089 85358 32767 3 0x90 nanoslp syz-executor 30530 122420 73221 32767 3 0x90 wait syz-executor 22881 11532 77509 32767 3 0x90 nanoslp syz-executor 41620 385507 94338 32767 3 0x90 nanoslp syz-executor 91667 518461 80471 32767 3 0x90 nanoslp syz-executor 24624 368375 50172 32767 3 0x90 nanoslp syz-executor 12738 253215 51758 32767 3 0x90 nanoslp syz-executor 147 100502 77091 32767 3 0x10 biowait syz-executor 80471 197866 53475 0 3 0x82 wait syz-executor 50172 363458 53475 0 3 0x82 wait syz-executor 77091 61128 53475 0 3 0x82 wait syz-executor 51758 175786 53475 0 3 0x82 wait syz-executor 73221 175726 53475 0 3 0x82 wait syz-executor 94338 245145 53475 0 3 0x82 wait syz-executor 77509 27864 53475 0 3 0x82 wait syz-executor 85358 388820 53475 0 3 0x82 wait syz-executor 53475 113846 89630 0 3 0x82 kqread syz-executor 89630 6865 210 0 3 0x10008a sigsusp ksh 210 309179 27132 0 3 0x98 kqread sshd-session 27132 118350 46735 0 3 0x92 kqread sshd-session 88306 382656 1 0 3 0x100083 ttyin getty 46735 90461 1 0 3 0x88 kqread sshd 92274 72895 38539 73 3 0x1100090 kqread syslogd 38539 111022 1 0 3 0x100082 sbwait syslogd 61269 225257 1 0 3 0x100080 kqread resolvd 64142 67262 47298 77 3 0x100092 kqread dhcpleased 91236 399187 47298 77 3 0x100092 kqread dhcpleased 47298 192451 1 0 3 0x80 kqread dhcpleased 45676 497561 0 0 3 0x14200 bored smr 79997 53007 0 0 3 0x14200 pgzero zerothread 76211 435173 0 0 3 0x14200 aiodoned aiodoned 83529 374018 0 0 3 0x14200 syncer update 34005 28979 0 0 3 0x14200 cleaner cleaner 65475 395659 0 0 3 0x14200 reaper reaper 63227 388197 0 0 3 0x14200 pgdaemon pagedaemon 55335 113744 0 0 3 0x14200 bored viomb 28627 68877 0 0 3 0x40014200 acpi0 acpi0 68817 267831 0 0 3 0x40014200 idle1 71900 49073 0 0 3 0x14200 bored softnet1 60362 479691 0 0 3 0x14200 bored softnet0 44146 267675 0 0 3 0x14200 bored systqmp 38465 4570 0 0 3 0x14200 bored systq 49306 379864 0 0 3 0x14200 tmoslp softclockmp 19588 425869 0 0 3 0x40014200 tmoslp softclock 23659 292413 0 0 3 0x40014200 idle0 1 301725 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 (0xffffffff839516b0) #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:765 #7 Xsyscall+0x128 Process 74167 (syz-executor) thread 0xffff8000fffeda10 (370736) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838c31a0) #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:765 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839516b0) #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:765 #7 Xsyscall+0x128 Process 147 (syz-executor) thread 0xffff80002a28b4d8 (100502) exclusive rrwlock inode r = 0 (0xfffffd806cb2c328) #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:765 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d6e3320) #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:765 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10193 10958K 10973K 166960K 11284 0 pcb 17 14K 16K 166960K 19 0 rtable 241 6K 7K 166960K 366 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 12 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 109 0 iov 0 0K 16K 166960K 93 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1485 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 4 9K 9K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 35 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 125K 166960K 576 0 sigio 0 0K 0K 166960K 17 0 proc 61 115K 147K 166960K 507 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 1 0K 0K 166960K 88 0 in_multi 99 7K 7K 166960K 127 0 ether_multi 1 0K 0K 166960K 10 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 486 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 284 153K 170K 166960K 7115 0 UVM aobj 24 3K 3K 166960K 28 0 pinsyscall 46 92K 112K 166960K 1642 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 26 0 NDP 11 0K 2K 166960K 27 0 temp 76 8680K 8744K 166960K 6198 0 kqueue 14 22K 33K 166960K 125 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 65 0 61 1 0 1 1 0 8 0 rtentry 176 114 0 2 6 0 6 6 0 8 0 unpcb 144 347 0 330 2 0 2 2 0 8 1 syncache 336 10 0 10 1 0 1 1 0 8 1 tcpqe 32 4 0 4 1 0 1 1 0 8 1 tcpcb 736 224 0 217 4 0 4 4 0 8 3 arp 136 18 0 0 1 0 1 1 0 8 0 ipq 40 8 0 3 1 0 1 1 0 8 0 ipqe 40 46 0 40 1 0 1 1 0 8 0 inpcb 328 676 0 662 9 0 9 9 0 8 7 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 2 0 2 1 0 1 1 0 8 1 nd6 152 27 0 1 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 256 464 0 9 29 0 29 29 0 8 0 art_table 40 465 0 9 5 0 5 5 0 8 0 art_node 32 114 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 1 0 1 1 0 8 1 semapl 112 33 0 23 1 0 1 1 0 8 0 shmpl 112 25 0 4 1 0 1 1 0 8 0 pool(0xffffffff83951698:shmpl): page inconsistency: page 0xfffffd806b74a000; 13 on list, 21 missing, 35 items per page dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 2333 0 821 95 0 95 95 0 8 0 ffsino 296 2333 0 821 117 0 117 117 0 8 0 nchpl 144 3150 0 1462 63 0 63 63 0 8 0 vnodes 216 2414 0 0 135 0 135 135 0 8 0 namei 1024 10749 0 10748 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 10369 0 10368 9 4 5 8 1 8 4 plimitpl 152 179 0 155 2 0 2 2 0 8 1 sigapl 424 862 0 809 7 0 7 7 0 8 0 knotepl 120 542 0 0 17 0 17 17 0 8 0 kqueuepl 224 167 0 155 2 0 2 2 0 8 1 pipepl 344 151 0 123 3 0 3 3 0 8 0 fdescpl 528 846 0 809 4 0 4 4 0 8 0 filepl 160 4969 0 4743 15 0 15 15 0 8 5 lockfpl 104 198 0 194 1 0 1 1 0 8 0 lockfspl 48 48 0 45 1 0 1 1 0 8 0 sessionpl 144 25 0 9 1 0 1 1 0 8 0 pgrppl 48 105 0 81 1 0 1 1 0 8 0 ucredpl 104 1056 0 1037 1 0 1 1 0 8 0 zombiepl 144 811 0 809 1 0 1 1 0 8 0 processpl 1232 862 0 809 5 0 5 5 0 8 0 procpl 664 1627 0 1561 7 0 7 7 0 8 0 sosppl 176 11 0 11 1 0 1 1 0 8 1 sockpl 752 1091 0 1056 14 2 12 14 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 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 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 261 0 0 17 0 17 17 0 8 0 bufpl 280 3201 0 116 221 0 221 221 0 8 0 anonpl 32 9595 0 0 78 0 78 78 0 246 0 amapchunkpl 152 23415 0 22775 39 0 39 39 0 158 11 amappl16 200 2989 0 2959 20 9 11 15 0 8 7 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 4 0 4 2 1 1 1 0 8 1 amappl13 176 402 0 401 1 0 1 1 0 8 0 amappl12 168 1194 0 1148 3 0 3 3 0 8 0 amappl11 160 7 0 7 2 2 0 1 0 8 0 amappl10 152 46 0 36 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 74 0 73 1 0 1 1 0 8 0 amappl6 120 267 0 255 1 0 1 1 0 8 0 amappl5 112 130 0 122 1 0 1 1 0 8 0 amappl4 104 391 0 366 1 0 1 1 0 8 0 amappl3 96 3794 0 3676 4 0 4 4 0 8 0 amappl2 88 989 0 910 3 0 3 3 0 8 1 amappl1 80 11685 0 11122 15 0 15 15 0 8 0 amappl 88 6318 0 6104 6 0 6 6 0 92 0 uvmvnodes 80 118 0 0 3 0 3 3 0 8 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 27 0 4 1 0 1 1 0 8 0 uaddrrnd 24 846 0 809 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 846 0 809 1 0 1 1 0 8 0 vmmpekpl 168 8687 0 8653 2 0 2 2 0 8 0 vmmpepl 168 61674 0 59573 109 0 109 109 0 357 10 vmsppl 488 845 0 809 7 1 6 6 0 8 1 rwobjpl 80 19799 0 18774 27 0 27 27 0 8 2 pdppl 4096 1700 0 1618 114 26 88 98 0 8 6 pvpl 32 18002 0 0 146 0 146 146 0 265 0 pmappl 256 845 0 809 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 292 0 29 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837b3ff0) 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(ffffffff838c2f98) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838c2f98) at __mp_lock+0x19e sys/kern/kern_lock.c:165 intr_handler(ffff80003c46cc50,ffff80000006b400) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838c2f98) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838c2f98) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80003c46ce20) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c46ce20) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xedf67e0a480, count: 6 ddb{0}> trace x86_ipi_db(ffffffff837b3ff0) 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(ffffffff838c2f98) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838c2f98) at __mp_lock+0x19e sys/kern/kern_lock.c:165 intr_handler(ffff80003c46cc50,ffff80000006b400) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838c2f98) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838c2f98) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80003c46ce20) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c46ce20) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xedf67e0a480, count: -9 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(ffffffff833a44c3) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83951698,1,ffff80003c471fb8) at pool_do_get+0x5df pool_get(ffffffff83951698,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffeda10,ffff80003c472210,91,ffff80003c472160) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffeda10,ffff80003c472210,ffff80003c472160) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c472210) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c472210) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xedeb7ac7b40, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a44c3) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83951698,1,ffff80003c471fb8) at pool_do_get+0x5df pool_get(ffffffff83951698,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffeda10,ffff80003c472210,91,ffff80003c472160) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffeda10,ffff80003c472210,ffff80003c472160) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c472210) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c472210) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xedeb7ac7b40, count: -8