panic: pool_do_get: shmpl free list modified: page 0xfffffd806e13d000; item addr 0xfffffd806e13dbd0; offset 0x40=0x672b572b Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 317976 52366 32767 0x10 0 0 syz-executor *353610 52366 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83069a0a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83539b20,1,ffff80002a12a978) at pool_do_get+0x5e6 pool_get(ffffffff83539b20,1) at pool_get+0x141 shmget_allocate_segment(ffff800035bc31e0,ffff80002a12abd0,10,ffff80002a12ab20) at shmget_allocate_segment+0x1a7 sys_shmget(ffff800035bc31e0,ffff80002a12abd0,ffff80002a12ab20) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a12abd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a12abd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9f559114db0, 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 0xfffffd806e13d000; item addr 0xfffffd806e13dbd0; offset 0x40=0x672b572b ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83069a0a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83539b20,1,ffff80002a12a978) at pool_do_get+0x5e6 pool_get(ffffffff83539b20,1) at pool_get+0x141 shmget_allocate_segment(ffff800035bc31e0,ffff80002a12abd0,10,ffff80002a12ab20) at shmget_allocate_segment+0x1a7 sys_shmget(ffff800035bc31e0,ffff80002a12abd0,ffff80002a12ab20) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a12abd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a12abd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9f559114db0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a12a7c0 rbx 0xffff800029b7cdbf rdx 0xffff80000126dec0 rcx 0xffff800035bc31e0 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x259a3f71a9239edc r11 0xa4445eeea9e34db7 r12 0xffff800029b7cbc0 r13 0 r14 0 r15 0x1 rip 0xffffffff821a1c45 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a12a7b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=353610 pid=52366 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffc520,0xffff800035bc3478 process=0xffff800035bc5b50 user=0xffff80002a125000, vmspace=0xfffffd806c0a0720 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52366 317976 28238 32767 7 0x10 syz-executor *52366 353610 28238 32767 7 0x4000010 syz-executor 7574 269201 47461 32767 2 0x10 syz-executor 7574 106599 47461 32767 3 0x4000090 fsleep syz-executor 17760 264260 49471 32767 2 0x10 syz-executor 17760 337098 49471 32767 2 0x4000010 syz-executor 4382 35774 71046 32767 3 0x90 nanoslp syz-executor 4382 450548 71046 32767 3 0x4000010 bqwait syz-executor 4382 298318 71046 32767 3 0x4000090 fsleep syz-executor 4382 483517 71046 32767 3 0x4000090 fsleep syz-executor 90643 209692 2988 32767 3 0x90 nanoslp syz-executor 90643 421970 2988 32767 3 0x4000090 fsleep syz-executor 90643 321736 2988 32767 3 0x4000090 kqread syz-executor 90643 90421 2988 32767 3 0x4000090 fsleep syz-executor 16665 314899 0 0 3 0x14200 bored sosplice 4103 220860 6318 32767 3 0x10 biowait syz-executor 47461 131460 73074 32767 3 0x90 nanoslp syz-executor 2988 501605 33295 32767 3 0x90 nanoslp syz-executor 28238 255630 86535 32767 3 0x90 nanoslp syz-executor 49471 223347 40130 32767 3 0x90 nanoslp syz-executor 71046 235452 62514 32767 3 0x90 nanoslp syz-executor 73074 442249 73996 0 3 0x82 wait syz-executor 33295 347765 73996 0 3 0x82 wait syz-executor 40130 21839 73996 0 3 0x82 wait syz-executor 62514 428650 73996 0 3 0x82 wait syz-executor 86535 346238 73996 0 3 0x82 wait syz-executor 6318 383496 73996 0 3 0x82 wait syz-executor 73996 108481 65567 0 3 0x82 nanoslp syz-executor 65567 332957 38153 0 3 0x10008a sigsusp ksh 38153 263110 59465 0 3 0x98 kqread sshd-session 59465 345195 98361 0 3 0x92 kqread sshd-session 17265 415544 1 0 3 0x100083 ttyin getty 98361 52985 1 0 3 0x88 kqread sshd 44732 140209 21487 73 3 0x1100090 kqread syslogd 21487 74113 1 0 3 0x100082 sbwait syslogd 4048 126143 1 0 3 0x100080 kqread resolvd 98890 359061 46889 77 3 0x100092 kqread dhcpleased 84829 68982 46889 77 3 0x100092 kqread dhcpleased 46889 421041 1 0 3 0x80 kqread dhcpleased 53130 145541 0 0 3 0x14200 bored smr 62889 109209 0 0 2 0x14200 zerothread 87413 337371 0 0 3 0x14200 aiodoned aiodoned 23832 453211 0 0 3 0x14200 syncer update 5214 354253 0 0 3 0x14200 cleaner cleaner 16929 423726 0 0 3 0x14200 reaper reaper 45318 156047 0 0 3 0x14200 pgdaemon pagedaemon 10905 6966 0 0 3 0x14200 bored viomb 8791 386159 0 0 3 0x40014200 acpi0 acpi0 25887 229156 0 0 3 0x40014200 idle1 14426 413285 0 0 3 0x14200 bored softnet3 34562 60033 0 0 3 0x14200 bored softnet2 75281 11133 0 0 3 0x14200 bored softnet1 21504 152767 0 0 3 0x14200 bored softnet0 70194 331748 0 0 3 0x14200 bored systqmp 81379 326944 0 0 3 0x14200 bored systq 24814 144120 0 0 3 0x14200 tmoslp softclockmp 71406 296376 0 0 3 0x40014200 tmoslp softclock 89046 193356 0 0 3 0x40014200 idle0 1 271261 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 (0xffffffff83539b30) #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+0x103 sys/kern/subr_pool.c:579 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 52366 (syz-executor) thread 0xffff800035bc31e0 (353610) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8363d160) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #1 syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83539b30) #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+0x103 sys/kern/subr_pool.c:579 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 4382 (syz-executor) thread 0xffff800035bc2f58 (450548) exclusive rrwlock inode r = 0 (0xfffffd806e161808) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:678 #6 ffs_sync_vnode+0x1aa sys/ufs/ffs/ffs_vfsops.c:1076 #7 vfs_mount_foreach_vnode+0x65 #8 ffs_sync+0x146 sys/ufs/ffs/ffs_vfsops.c:1131 #9 sys_sync+0xfe sys/kern/vfs_syscalls.c:537 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 shared rwlock vfslock r = 0 (0xffff800000b66058) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vfs_busy+0x90 sys/kern/vfs_subr.c:236 #3 sys_sync+0x5d sys/kern/vfs_syscalls.c:530 #4 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #4 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Process 4103 (syz-executor) thread 0xffff800032b9ccc8 (220860) exclusive rrwlock inode r = 0 (0xfffffd807ab80f88) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:169 #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:3099 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d14d700) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #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:3084 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10173 11042K 11059K 166960K 11257 0 pcb 17 12K 12K 166960K 17 0 rtable 192 5K 7K 166960K 355 0 pf 27 16K 16K 166960K 31 0 ifaddr 34 6K 7K 166960K 44 0 ifgroup 42 1K 2K 166960K 50 0 counters 60 35K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 34 0 iov 0 0K 4K 166960K 5 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1364 86K 86K 166960K 1518 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 8 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 19 69K 129K 166960K 290 0 proc 59 91K 115K 166960K 494 0 subproc 78 4K 6K 166960K 234 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 35 0 in_multi 77 5K 7K 166960K 105 0 ether_multi 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 43 201K 201K 166960K 43 0 exec 0 0K 1K 166960K 362 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 219 56K 88K 166960K 3796 0 UVM aobj 6 2K 2K 166960K 7 0 pinsyscall 40 80K 112K 166960K 1286 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 9 0K 2K 166960K 27 0 temp 29 6810K 6876K 166960K 4716 0 kqueue 14 22K 24K 166960K 40 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 44 0 41 1 0 1 1 0 8 0 rtentry 112 113 0 24 4 0 4 4 0 8 0 unpcb 144 119 0 101 2 0 2 2 0 8 1 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 808 153 0 148 8 0 8 8 0 8 7 arp 120 18 0 4 1 0 1 1 0 8 0 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 44 0 44 1 0 1 1 0 8 1 inpcb 336 264 0 255 7 0 7 7 0 8 6 nd6 136 26 0 7 1 0 1 1 0 8 0 kcovpl 48 18 0 12 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 457 0 90 29 0 29 29 0 8 4 art_table 32 458 0 90 4 0 4 4 0 8 0 art_node 16 112 0 31 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semupl 112 1 0 0 1 0 1 1 0 8 0 semapl 112 6 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 1 1 0 1 1 0 8 0 pool(0xffffffff83539b20:shmpl): page inconsistency: page 0xfffffd806e13d000; 31 on list, 3 missing, 35 items per page dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1703 0 188 95 0 95 95 0 8 0 ffsino 272 1703 0 188 102 0 102 102 0 8 0 nchpl 144 2049 0 368 63 0 63 63 0 8 0 uvmvnodes 80 1946 0 0 40 0 40 40 0 8 0 vnodes 216 1946 0 0 109 0 109 109 0 8 0 namei 1024 6204 0 6203 1 0 1 1 0 8 0 percpumem 16 46 0 2 1 0 1 1 0 8 0 kstatmem 264 22 0 4 2 0 2 2 0 8 0 scxspl 216 6218 0 6147 9 1 8 8 1 8 2 plimitpl 152 67 0 45 2 0 2 2 0 8 1 sigapl 424 544 0 493 8 0 8 8 0 8 1 futexpl 64 1692 0 1687 1 0 1 1 0 8 0 knotepl 120 278 0 0 9 0 9 9 0 8 0 kqueuepl 216 54 0 44 1 0 1 1 0 8 0 pipepl 320 142 0 115 3 0 3 3 0 8 0 fdescpl 496 525 0 494 7 1 6 6 0 8 1 filepl 152 2237 0 2027 13 0 13 13 0 8 2 lockfpl 104 37 0 35 1 0 1 1 0 8 0 lockfspl 48 16 0 14 1 0 1 1 0 8 0 sessionpl 144 33 0 19 1 0 1 1 0 8 0 pgrppl 48 51 0 30 1 0 1 1 0 8 0 ucredpl 104 192 0 175 1 0 1 1 0 8 0 zombiepl 144 494 0 493 1 0 1 1 0 8 0 processpl 1160 544 0 493 5 0 5 5 0 8 0 procpl 648 736 0 676 7 0 7 7 0 8 1 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 664 435 0 405 10 0 10 10 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 128 0 0 16 0 16 16 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 306 0 0 20 0 20 20 0 8 0 bufpl 280 2372 0 94 163 0 163 163 0 8 0 anonpl 24 139796 0 136573 35 1 34 35 0 185 10 amapchunkpl 152 12437 0 11961 30 0 30 30 0 158 8 amappl16 200 3447 0 3433 5 1 4 5 0 8 3 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 111 0 101 1 0 1 1 0 8 0 amappl13 176 11 0 11 1 1 0 1 0 8 0 amappl12 168 1119 0 1088 2 0 2 2 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 14 0 13 1 0 1 1 0 8 0 amappl9 144 188 0 187 1 0 1 1 0 8 0 amappl8 136 28 0 26 1 0 1 1 0 8 0 amappl7 128 97 0 87 1 0 1 1 0 8 0 amappl6 120 159 0 158 1 0 1 1 0 8 0 amappl5 112 144 0 136 1 0 1 1 0 8 0 amappl4 104 287 0 274 1 0 1 1 0 8 0 amappl3 96 2084 0 1997 3 0 3 3 0 8 0 amappl2 88 791 0 712 3 0 3 3 0 8 0 amappl1 80 8000 0 7487 13 0 13 13 0 8 0 amappl 88 3437 0 3271 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 6 0 1 1 0 1 1 0 8 0 uaddrrnd 24 525 0 494 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 525 0 494 1 0 1 1 0 8 0 vmmpekpl 168 6027 0 5984 3 0 3 3 0 8 0 vmmpepl 168 40208 0 38460 95 0 95 95 0 357 7 vmsppl 448 524 0 494 6 0 6 6 0 8 1 rwobjpl 56 16911 0 14172 39 0 39 39 0 8 0 pdppl 4096 1057 0 988 117 36 81 99 0 8 12 pvpl 32 12756 0 0 103 0 103 103 0 265 0 pmappl 248 524 0 494 4 1 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 414 0 38 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8345fff0) 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(ffffffff8363cf58) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8363cf58) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff8000371e52d0,ffff800000079f80) 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: 0x74dc2b40fb30, count: 9 ddb{0}> trace x86_ipi_db(ffffffff8345fff0) 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(ffffffff8363cf58) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8363cf58) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff8000371e52d0,ffff800000079f80) 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: 0x74dc2b40fb30, 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(ffffffff83069a0a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83539b20,1,ffff80002a12a978) at pool_do_get+0x5e6 pool_get(ffffffff83539b20,1) at pool_get+0x141 shmget_allocate_segment(ffff800035bc31e0,ffff80002a12abd0,10,ffff80002a12ab20) at shmget_allocate_segment+0x1a7 sys_shmget(ffff800035bc31e0,ffff80002a12abd0,ffff80002a12ab20) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a12abd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a12abd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9f559114db0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83069a0a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83539b20,1,ffff80002a12a978) at pool_do_get+0x5e6 pool_get(ffffffff83539b20,1) at pool_get+0x141 shmget_allocate_segment(ffff800035bc31e0,ffff80002a12abd0,10,ffff80002a12ab20) at shmget_allocate_segment+0x1a7 sys_shmget(ffff800035bc31e0,ffff80002a12abd0,ffff80002a12ab20) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a12abd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a12abd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9f559114db0, count: -8