panic: pool_do_get: shmpl free list modified: page 0xfffffd8061b1e000; item addr 0xfffffd8061b1eaf8; offset 0x40=0x68ae37bf Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 57127 90382 32767 0x10 0 1 syz-executor *378008 21524 32767 0x10 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336ad33) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839c4900,1,ffff80003481b618) at pool_do_get+0x5df pool_get(ffffffff839c4900,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff800035020560,ffff80003481b870,97,ffff80003481b7c0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff800035020560,ffff80003481b870,ffff80003481b7c0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003481b870) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003481b870) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdd59791fc10, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: pool_do_get: shmpl free list modified: page 0xfffffd8061b1e000; item addr 0xfffffd8061b1eaf8; offset 0x40=0x68ae37bf ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336ad33) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839c4900,1,ffff80003481b618) at pool_do_get+0x5df pool_get(ffffffff839c4900,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff800035020560,ffff80003481b870,97,ffff80003481b7c0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff800035020560,ffff80003481b870,ffff80003481b7c0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003481b870) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003481b870) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdd59791fc10, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003481b440 rbx 0xffffffff8381eddf cpu_info_full_primary+0x2ddf rdx 0xffff800001462b80 rcx 0xffff800035020560 rax 0xffffffff8381dff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xa304936d3c94b204 r11 0xfad45e99256acce2 r12 0xffffffff8381ebe0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff82add6b5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003481b430 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=378008 pid=21524 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=74, usrpri=75, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800035021cb8,0xffffffff839a09b8 process=0xffff80002a373510 user=0xffff800034816000, vmspace=0xfffffd80731a73e8 estcpu=25, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90382 57127 34569 32767 7 0x10 syz-executor 90382 349779 34569 32767 3 0x4000010 biowait syz-executor 21524 49820 43683 32767 2 0x10 syz-executor *21524 378008 43683 32767 7 0x4000010 syz-executor 94448 400014 13744 0 3 0x82 sbwait sshd-session 58579 261553 13744 0 3 0x82 sbwait sshd-session 54585 365541 13744 0 3 0x82 sbwait sshd-session 9451 444813 13744 0 3 0x82 sbwait sshd-session 46281 423038 0 0 3 0x14200 bored sosplice 42933 415583 97539 32767 2 0x10 syz-executor 66438 145574 67366 32767 3 0x90 piperd syz-executor 43683 91291 77729 32767 3 0x90 nanoslp syz-executor 1559 504227 57316 32767 3 0x90 piperd syz-executor 89065 176219 64293 32767 3 0x90 piperd syz-executor 40781 266494 70131 32767 3 0x90 piperd syz-executor 34569 44549 47673 32767 3 0x90 nanoslp syz-executor 77729 357980 88986 0 3 0x82 wait syz-executor 57316 483427 88986 0 3 0x82 wait syz-executor 64293 81881 88986 0 3 0x82 wait syz-executor 70131 355077 88986 0 3 0x82 wait syz-executor 67366 300511 88986 0 3 0x82 wait syz-executor 47673 388327 88986 0 3 0x82 wait syz-executor 97539 520504 88986 0 3 0x82 wait syz-executor 88986 490802 14885 0 3 0x82 nanoslp syz-executor 14885 454910 88107 0 3 0x10008a sigsusp ksh 88107 301272 67798 0 3 0x98 kqread sshd-session 67798 497495 13744 0 3 0x92 kqread sshd-session 88886 146552 1 0 3 0x100083 ttyin getty 13744 297016 1 0 3 0x88 kqread sshd 26260 421157 21206 73 3 0x1100090 kqread syslogd 21206 144257 1 0 3 0x100082 sbwait syslogd 14373 73627 1 0 3 0x100080 kqread resolvd 23002 243004 73422 77 3 0x100092 kqread dhcpleased 47708 296271 73422 77 3 0x100092 kqread dhcpleased 73422 252728 1 0 3 0x80 kqread dhcpleased 12526 417978 0 0 3 0x14200 bored smr 15506 509881 0 0 2 0x14200 zerothread 87898 13514 0 0 3 0x14200 aiodoned aiodoned 89954 133843 0 0 3 0x14200 syncer update 59185 48608 0 0 3 0x14200 cleaner cleaner 95517 300804 0 0 3 0x14200 reaper reaper 34037 330681 0 0 3 0x14200 pgdaemon pagedaemon 3409 241228 0 0 3 0x14200 bored viomb 70081 262806 0 0 3 0x40014200 acpi0 acpi0 47200 508042 0 0 3 0x40014200 idle1 77696 298411 0 0 3 0x14200 bored softnet7 4640 314865 0 0 3 0x14200 bored softnet6 72051 417446 0 0 3 0x14200 bored softnet5 44386 183737 0 0 3 0x14200 bored softnet4 43524 75395 0 0 3 0x14200 bored softnet3 9934 191773 0 0 3 0x14200 bored softnet2 85325 183495 0 0 3 0x14200 bored softnet1 16116 141771 0 0 3 0x14200 bored softnet0 482 234474 0 0 3 0x14200 bored systqmp 27001 20629 0 0 3 0x14200 bored systq 19086 12001 0 0 3 0x14200 tmoslp softclockmp 81713 262929 0 0 3 0x40014200 tmoslp softclock 12213 117589 0 0 3 0x40014200 idle0 1 34748 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex shmpl r = 0 (0xffffffff839c4918) #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 90382 (syz-executor) thread 0xffff800035021cb8 (349779) exclusive rrwlock inode r = 0 (0xfffffd8069fda6a8) #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_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 #10 vn_open+0x34d sys/kern/vfs_vnops.c:116 #11 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8067ff2338) #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 vn_open+0x1f1 sys/kern/vfs_vnops.c:107 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 Process 21524 (syz-executor) thread 0xffff800035020560 (378008) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83906f20) #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 (0xffffffff839c4918) #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 42933 (syz-executor) thread 0xffff80002a2e5248 (415583) exclusive rrwlock inode r = 0 (0xfffffd806e49a6d8) #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:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d015a08) #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:748 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10192 10954K 10968K 166960K 11273 0 pcb 17 12K 12K 166960K 17 0 rtable 197 5K 6K 166960K 275 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 7 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 40 0 iov 0 0K 16K 166960K 86 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1545 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 125K 166960K 482 0 sigio 0 0K 0K 166960K 3 0 proc 58 99K 147K 166960K 490 0 subproc 63 3K 4K 166960K 252 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 88 6K 7K 166960K 102 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 424 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 231 184K 202K 166960K 5470 0 UVM aobj 40 2K 3K 166960K 42 0 pinsyscall 47 94K 114K 166960K 1519 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 17 0 NDP 10 0K 1K 166960K 27 0 temp 39 8643K 8708K 166960K 5160 0 kqueue 13 20K 27K 166960K 88 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 85 0 82 2 1 1 2 0 8 0 rtentry 176 102 0 12 5 0 5 5 0 8 0 unpcb 144 294 0 271 2 0 2 2 0 8 0 syncache 336 12 0 12 1 0 1 1 0 8 1 tcpcb 736 237 0 225 7 5 2 7 0 8 0 arp 128 11 0 1 1 0 1 1 0 8 0 ipq 40 2 0 1 1 0 1 1 0 8 0 ipqe 40 4 0 3 1 0 1 1 0 8 0 inpcb 328 421 0 404 8 5 3 7 0 8 1 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 144 22 0 4 1 0 1 1 0 8 0 kcovpl 48 28 0 21 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 470 0 67 29 1 28 29 0 8 0 art_table 40 471 0 67 5 0 5 5 0 8 0 art_node 32 102 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 1 1 0 1 1 0 8 0 semapl 112 3 0 0 1 0 1 1 0 8 0 shmpl 112 39 0 2 2 0 2 2 0 8 0 pool(0xffffffff839c4900:shmpl): page inconsistency: page 0xfffffd8061b1e000; 32 on list, 2 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1935 0 408 96 0 96 96 0 8 0 ffsino 296 1935 0 408 118 0 118 118 0 8 0 nchpl 144 2559 0 869 63 0 63 63 0 8 0 uvmvnodes 80 2196 0 0 45 0 45 45 0 8 0 vnodes 216 2196 0 0 122 0 122 122 0 8 0 namei 1024 7835 0 7833 2 1 1 2 0 8 0 percpumem 16 49 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 8870 0 8869 11 3 8 8 1 8 7 plimitpl 152 131 0 109 2 0 2 2 0 8 1 sigapl 424 727 0 670 9 1 8 8 0 8 0 knotepl 120 418 0 0 13 0 13 13 0 8 0 kqueuepl 224 195 0 186 5 4 1 5 0 8 0 pipepl 344 208 0 181 6 3 3 6 0 8 0 fdescpl 528 704 0 670 4 1 3 4 0 8 0 filepl 160 3300 0 3087 13 2 11 13 0 8 0 lockfpl 104 65 0 62 1 0 1 1 0 8 0 lockfspl 48 30 0 27 1 0 1 1 0 8 0 sessionpl 144 48 0 29 1 0 1 1 0 8 0 pgrppl 48 78 0 52 1 0 1 1 0 8 0 ucredpl 104 439 0 421 1 0 1 1 0 8 0 zombiepl 144 670 0 670 1 0 1 1 0 8 1 processpl 1232 727 0 670 7 1 6 6 0 8 0 procpl 664 1190 0 1131 7 0 7 7 0 8 0 sosppl 168 7 0 5 1 0 1 1 0 8 0 sockpl 752 803 0 760 13 6 7 11 0 8 2 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 318 0 0 20 0 20 20 0 8 0 bufpl 280 3451 0 117 239 0 239 239 0 8 0 anonpl 32 7364 0 0 60 0 60 60 0 246 0 amapchunkpl 152 19461 0 19051 34 7 27 32 0 158 7 amappl16 200 2551 0 2530 13 8 5 13 0 8 1 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 121 0 107 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1311 0 1277 2 0 2 2 0 8 0 amappl11 160 47 0 37 1 0 1 1 0 8 0 amappl10 152 9 0 9 1 1 0 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 21 0 20 1 0 1 1 0 8 0 amappl7 128 109 0 95 1 0 1 1 0 8 0 amappl6 120 190 0 183 1 0 1 1 0 8 0 amappl5 112 130 0 124 1 0 1 1 0 8 0 amappl4 104 286 0 269 1 0 1 1 0 8 0 amappl3 96 3068 0 2969 4 0 4 4 0 8 0 amappl2 88 654 0 575 2 0 2 2 0 8 0 amappl1 80 10680 0 9779 19 0 19 19 0 8 0 amappl 88 4736 0 4592 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 41 0 2 1 0 1 1 0 8 0 uaddrrnd 24 704 0 670 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 704 0 670 1 0 1 1 0 8 0 vmmpekpl 168 8049 0 8006 3 0 3 3 0 8 0 vmmpepl 168 52624 0 50308 115 0 115 115 0 357 1 vmsppl 488 703 0 670 8 2 6 6 0 8 1 rwobjpl 80 19171 0 15756 71 0 71 71 0 8 0 pdppl 4096 1415 0 1340 129 40 89 97 0 8 14 pvpl 32 14570 0 0 118 0 118 118 0 265 0 pmappl 256 703 0 670 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 316 0 50 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336ad33) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839c4900,1,ffff80003481b618) at pool_do_get+0x5df pool_get(ffffffff839c4900,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff800035020560,ffff80003481b870,97,ffff80003481b7c0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff800035020560,ffff80003481b870,ffff80003481b7c0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003481b870) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003481b870) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdd59791fc10, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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 end of kernel end trace frame: 0x7b891f854150, count: 12 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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 end of kernel end trace frame: 0x7b891f854150, count: -3