panic: pool_do_get: shmpl free list modified: page 0xfffffd8065010000; item addr 0xfffffd8065010e70; offset 0x40=0xf69ecca7 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 194931 5435 0 0 0 0 syz-executor *262437 5435 0 0 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336bef0) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8393ca38,1,ffff80003c4cae28) at pool_do_get+0x5df pool_get(ffffffff8393ca38,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2d4570,ffff80003c4cb080,42,ffff80003c4cafd0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2d4570,ffff80003c4cb080,ffff80003c4cafd0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c4cb080) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4cb080) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd039485f270, 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 0xfffffd8065010000; item addr 0xfffffd8065010e70; offset 0x40=0xf69ecca7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336bef0) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8393ca38,1,ffff80003c4cae28) at pool_do_get+0x5df pool_get(ffffffff8393ca38,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2d4570,ffff80003c4cb080,42,ffff80003c4cafd0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2d4570,ffff80003c4cb080,ffff80003c4cafd0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c4cb080) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4cb080) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd039485f270, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4cac50 rbx 0xffff8000299eeddf rdx 0 rcx 0xffff80002a2d4570 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x2351d5986381e2d9 r11 0x745c8fa53acbf1ee r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff82d2ae85 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4cac40 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=262437 pid=5435 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003100ad18,0xffffffff83930db8 process=0xffff800034c24500 user=0xffff80003c4c6000, vmspace=0xfffffd806ef6a008 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 58334 327779 67207 0 2 0 syz-executor 58334 353054 67207 0 3 0x4000080 fsleep syz-executor 58334 344839 67207 0 3 0x4000080 fsleep syz-executor 58334 378465 67207 0 2 0x4000000 syz-executor 5435 194931 56099 0 7 0 syz-executor 5435 367955 56099 0 3 0x4000080 kqread syz-executor 5435 183986 56099 0 2 0x4000000 syz-executor * 5435 262437 56099 0 7 0x4000000 syz-executor 85778 401512 29479 0 3 0x82 sysctllk syz-executor 52022 154155 29479 0 3 0x82 sysctllk syz-executor 10647 251809 29479 0 3 0x82 sysctllk syz-executor 8211 93146 29479 0 3 0x82 sysctllk syz-executor 35018 515406 29479 0 3 0x82 sysctllk syz-executor 98919 479189 29479 0 3 0x82 sysctllk syz-executor 29077 226658 1 0 3 0x3000 suspend syz-executor 29077 229831 1 0 3 0x4081000 sysctllk syz-executor 9045 180462 1 60929 3 0x3010 suspend syz-executor 9045 183075 1 60929 3 0x4081010 sysctllk syz-executor 1607 267445 1 0 3 0x82 sysctllk getty 43501 306652 1 0 3 0x3000 suspend syz-executor 43501 277707 1 0 3 0x4081000 sysctllk syz-executor 93873 158088 1 0 3 0 vmmapbsy syz-executor 93873 221045 1 0 3 0x4000000 vmmapbsy syz-executor 93873 369999 1 0 3 0x4000000 fltagain2 syz-executor 42113 373895 0 0 3 0x14280 nfsidl nfsio 51603 113610 0 0 3 0x14280 nfsidl nfsio 53598 310776 0 0 3 0x14280 nfsidl nfsio 96054 339076 0 0 3 0x14280 nfsidl nfsio 33560 162567 0 0 3 0x14280 nfsidl nfsio 12203 124993 0 0 3 0x14280 nfsidl nfsio 92444 145944 0 0 3 0x14280 nfsidl nfsio 40806 384172 0 0 3 0x14280 nfsidl nfsio 90562 499181 0 0 3 0x14280 nfsidl nfsio 87239 515474 0 0 3 0x14280 nfsidl nfsio 5161 344632 0 0 3 0x14280 nfsidl nfsio 97571 503524 0 0 3 0x14280 nfsidl nfsio 12055 115590 0 0 3 0x14280 nfsidl nfsio 80917 311041 0 0 3 0x14280 nfsidl nfsio 9292 180438 0 0 3 0x14280 nfsidl nfsio 67133 27918 0 0 3 0x14280 nfsidl nfsio 62421 339004 0 0 3 0x14280 nfsidl nfsio 57808 244365 0 0 3 0x14280 nfsidl nfsio 54182 69440 0 0 3 0x14280 nfsidl nfsio 10671 463971 0 0 3 0x14280 nfsidl nfsio 67207 104586 29479 0 3 0x82 nanoslp syz-executor 99605 256897 0 0 3 0x14200 bored sosplice 56099 155113 29479 0 3 0x82 nanoslp syz-executor 29479 155806 87486 0 3 0x82 kqread syz-executor 87486 263269 59934 0 3 0x10008a sigsusp ksh 59934 121237 11709 0 3 0x98 kqread sshd-session 11709 177535 16828 0 3 0x92 kqread sshd-session 16828 388028 1 0 3 0x88 kqread sshd 32031 420274 51129 74 3 0x1100092 bpf pflogd 51129 418738 1 0 3 0x80 sbwait pflogd 95863 523698 50420 73 3 0x1100090 kqread syslogd 50420 420048 1 0 3 0x100082 sbwait syslogd 52496 382331 1 0 3 0x100080 kqread resolvd 44392 361844 39557 77 3 0x100092 sysctllk dhcpleased 21552 352104 39557 77 3 0x100092 kqread dhcpleased 39557 236884 1 0 3 0x80 kqread dhcpleased 85702 76933 0 0 3 0x14200 bored smr 21103 368176 0 0 3 0x14200 pgzero zerothread 82077 246262 0 0 3 0x14200 aiodoned aiodoned 95842 174700 0 0 3 0x14200 syncer update 55746 11504 0 0 3 0x14200 cleaner cleaner 25248 101984 0 0 3 0x14200 reaper reaper 79486 60173 0 0 3 0x14200 pgdaemon pagedaemon 67165 505658 0 0 3 0x14200 bored viomb 64741 520487 0 0 3 0x40014200 acpi0 acpi0 60791 408980 0 0 3 0x40014200 idle1 92759 284875 0 0 3 0x14200 bored softnet7 24058 273746 0 0 3 0x14200 bored softnet6 62096 86732 0 0 3 0x14200 bored softnet5 90887 341257 0 0 3 0x14200 bored softnet4 84224 424069 0 0 3 0x14200 bored softnet3 23708 157910 0 0 3 0x14200 bored softnet2 56751 109760 0 0 3 0x14200 bored softnet1 68795 178102 0 0 3 0x14200 bored softnet0 20703 153797 0 0 3 0x14200 bored systqmp 88574 21880 0 0 3 0x14200 bored systq 79751 358628 0 0 3 0x14200 tmoslp softclockmp 88322 491748 0 0 3 0x40014200 tmoslp softclock 28293 76392 0 0 3 0x40014200 idle0 1 264849 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 (0xffffffff8393ca50) #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:748 #7 Xsyscall+0x128 Process 5435 (syz-executor) thread 0xffff80002a2d4570 (262437) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8392bc80) #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:748 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff8393ca50) #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:748 #7 Xsyscall+0x128 Process 93873 (syz-executor) thread 0xffff80002a3bb260 (221045) exclusive rrwlock inode r = 0 (0xfffffd8069fc1d98) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 93873 (syz-executor) thread 0xffff80003c48a560 (369999) exclusive rwlock sysctllk r = 0 (0xffffffff8384a8b8) #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 sysctl_vslock+0x45 sys/kern/kern_sysctl.c:191 #3 sys_sysctl+0x371 sys/kern/kern_sysctl.c:301 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #5 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10240 11058K 12395K 166960K 15507 0 pcb 82 20K 22K 166960K 616 0 rtable 157 11K 13K 166960K 617 0 pf 32 17K 81K 166960K 326 0 ifaddr 32 6K 9K 166960K 215 0 ifgroup 51 2K 2K 166960K 383 0 sysctl 4 1K 9K 166960K 16 0 counters 66 36K 38K 166960K 516 0 ioctlops 0 0K 4K 166960K 2170 0 iov 0 0K 28K 166960K 377 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1506 95K 96K 166960K 4469 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 40 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 216 0 dirhash 12 2K 2K 166960K 102 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 39K 240K 166960K 3317 0 sigio 0 0K 0K 166960K 184 0 proc 64 99K 180K 166960K 912 0 subproc 54 3K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 404 0 in_multi 38 2K 7K 166960K 299 0 ether_multi 1 0K 0K 166960K 98 0 mrt 1 0K 0K 166960K 18 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 953 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 9 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 235 149K 189K 166960K 33478 0 UVM aobj 72 5K 5K 166960K 83 0 pinsyscall 41 82K 102K 166960K 4436 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 200 0 NDP 11 0K 2K 166960K 156 0 temp 74 8651K 8907K 166960K 147309 0 kqueue 14 22K 34K 166960K 655 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 120 301 0 298 3 2 1 3 0 8 0 rtentry 176 194 0 150 5 0 5 5 0 8 0 unpcb 144 2378 0 2360 25 24 1 6 0 8 0 syncache 336 10 0 10 2 2 0 1 0 8 0 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 736 1457 0 1453 43 38 5 7 0 8 4 arp 128 28 0 20 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 328 4192 0 4118 49 42 7 13 0 8 0 nd6 144 27 0 21 1 0 1 1 0 8 0 pkpcb 40 37 0 37 11 11 0 1 0 8 0 kcovpl 48 9 0 3 1 0 1 1 0 8 0 mppekey 1024 3 0 3 3 3 0 1 0 8 0 ppxss 1192 194 0 194 7 6 1 1 0 8 1 pppxif 1504 19 0 19 6 6 0 1 0 8 0 pffrag 232 20 0 19 1 0 1 1 0 482 0 pffrnode 88 20 0 19 1 0 1 1 0 8 0 pffrent 40 32 0 31 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 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfstitem 24 194 0 155 1 0 1 1 0 8 0 pfstkey 128 194 0 150 3 0 3 3 0 8 0 pfstate 384 194 0 155 9 0 9 9 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 3 0 3 2 2 0 1 0 8 0 art_heap8 4096 7 0 2 7 2 5 6 0 8 0 art_heap4 256 831 0 640 30 14 16 29 0 8 0 art_table 40 838 0 642 5 0 5 5 0 8 0 art_node 32 192 0 156 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 15 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 212 0 202 1 0 1 1 0 8 0 shmpl 112 80 0 11 2 0 2 2 0 8 0 pool(0xffffffff8393ca38:shmpl): page inconsistency: page 0xfffffd8065010000; 0 on list, 34 missing, 35 items per page dirhash 1024 77 0 60 3 0 3 3 0 8 0 dino2pl 256 8187 0 6673 96 1 95 96 0 8 0 ffsino 296 8187 0 6673 118 1 117 118 0 8 0 nchpl 144 12886 0 11175 64 0 64 64 0 8 0 rtmask 32 32 0 32 6 6 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 45112 0 45112 7 6 1 2 0 8 1 percpumem 16 273 0 225 1 0 1 1 0 8 0 kstatmem 264 278 0 250 7 4 3 3 0 8 0 scsiplug 72 24 0 24 9 8 1 1 0 8 1 scxspl 216 104688 0 104688 17 16 1 8 1 8 1 plimitpl 152 1009 0 987 2 1 1 2 0 8 0 sigapl 424 3599 0 3526 9 0 9 9 0 8 0 knotepl 120 805 0 0 25 0 25 25 0 8 0 kqueuepl 224 1412 0 1402 11 10 1 6 0 8 0 pipepl 344 717 0 686 27 23 4 9 0 8 0 fdescpl 528 3551 0 3521 3 0 3 3 0 8 0 filepl 160 25991 0 25690 51 38 13 18 0 8 0 lockfpl 104 1785 0 1782 4 3 1 2 0 8 0 lockfspl 48 599 0 596 1 0 1 1 0 8 0 sessionpl 144 31 0 23 1 0 1 1 0 8 0 pgrppl 48 94 0 74 1 0 1 1 0 8 0 ucredpl 104 4911 0 4896 1 0 1 1 0 8 0 zombiepl 144 4523 0 4520 1 0 1 1 0 8 0 processpl 1248 3599 0 3526 7 1 6 7 0 8 0 procpl 664 9583 0 9499 9 0 9 9 0 8 0 sosppl 168 22 0 21 9 8 1 1 0 8 0 sockpl 752 7031 0 6936 79 69 10 21 0 8 0 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 73 0 0 7 0 7 7 0 8 0 mtagpl 96 23 0 0 1 0 1 1 0 8 0 mbufpl 256 524 0 0 28 0 28 28 0 8 0 bufpl 280 44067 0 37924 440 0 440 440 0 8 0 anonpl 32 13072 0 0 105 0 105 105 0 246 0 amapchunkpl 152 113709 0 113193 82 55 27 32 0 158 5 amappl16 200 16086 0 16036 106 91 15 28 0 8 6 amappl15 192 7 0 7 3 3 0 1 0 8 0 amappl14 184 132 0 120 1 0 1 1 0 8 0 amappl13 176 9 0 9 3 2 1 1 0 8 1 amappl12 168 4219 0 4196 3 1 2 2 0 8 0 amappl11 160 52 0 37 1 0 1 1 0 8 0 amappl10 152 4 0 4 3 3 0 1 0 8 0 amappl9 144 256 0 255 1 0 1 1 0 8 0 amappl8 136 31 0 28 1 0 1 1 0 8 0 amappl7 128 121 0 108 1 0 1 1 0 8 0 amappl6 120 193 0 188 1 0 1 1 0 8 0 amappl5 112 132 0 121 1 0 1 1 0 8 0 amappl4 104 337 0 315 1 0 1 1 0 8 0 amappl3 96 23169 0 23072 5 1 4 4 0 8 0 amappl2 88 783 0 718 2 0 2 2 0 8 0 amappl1 80 22377 0 21782 18 3 15 16 0 8 0 amappl 88 32354 0 32192 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 267 0 267 9 8 1 1 0 8 1 dma64 64 9 0 9 4 4 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 82 0 11 2 0 2 2 0 8 0 uaddrrnd 24 3551 0 3521 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3551 0 3521 1 0 1 1 0 8 0 vmmpekpl 168 29361 0 29289 4 0 4 4 0 8 0 vmmpepl 168 234106 0 232253 124 25 99 111 0 357 0 vmsppl 488 3550 0 3521 6 1 5 5 0 8 0 rwobjpl 80 68701 0 61732 152 2 150 151 0 8 0 pdppl 4096 7109 0 7042 101 34 67 83 0 8 0 pvpl 32 23317 0 0 189 2 187 187 0 265 0 pmappl 256 3550 0 3521 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 356 0 106 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83847ff0) 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(ffffffff8392ba78) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8392ba78) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x77bc92c03630, count: 8 ddb{0}> trace x86_ipi_db(ffffffff83847ff0) 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(ffffffff8392ba78) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8392ba78) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x77bc92c03630, count: -7 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(ffffffff8336bef0) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8393ca38,1,ffff80003c4cae28) at pool_do_get+0x5df pool_get(ffffffff8393ca38,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2d4570,ffff80003c4cb080,42,ffff80003c4cafd0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2d4570,ffff80003c4cb080,ffff80003c4cafd0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c4cb080) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4cb080) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd039485f270, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336bef0) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8393ca38,1,ffff80003c4cae28) at pool_do_get+0x5df pool_get(ffffffff8393ca38,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2d4570,ffff80003c4cb080,42,ffff80003c4cafd0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2d4570,ffff80003c4cb080,ffff80003c4cafd0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c4cb080) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4cb080) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd039485f270, count: -8