./file0./file0åÿÿÿÿóz êÏpanic: pool_do_get: shmpl free list modified: page 0xfffffd8077c3f000; item addr 0xfffffd8077c3f2a0; offset 0x40=0x68b93359 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 314173 79565 0 0 0 0 syz-executor * 79009 79565 0 0 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336bd01) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839b9068,1,ffff80003c438e28) at pool_do_get+0x5df pool_get(ffffffff839b9068,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000338082b8,ffff80003c439080,5a,ffff80003c438fd0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000338082b8,ffff80003c439080,ffff80003c438fd0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c439080) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439080) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xac1e931d8a0, 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 0xfffffd8077c3f000; item addr 0xfffffd8077c3f2a0; offset 0x40=0x68b93359 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336bd01) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839b9068,1,ffff80003c438e28) at pool_do_get+0x5df pool_get(ffffffff839b9068,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000338082b8,ffff80003c439080,5a,ffff80003c438fd0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000338082b8,ffff80003c439080,ffff80003c438fd0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c439080) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439080) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xac1e931d8a0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c438c50 rbx 0xffff8000299eeddf rdx 0xffff800001472e80 rcx 0xffff8000338082b8 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x55976e099a2c2a8d r11 0xb3bffcced7a449c0 r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff82e305a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c438c40 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=79009 pid=79565 tcnt=2 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=0xffff800033809ca8,0xffffffff838730d0 process=0xffff800036426b70 user=0xffff80003c434000, vmspace=0xfffffd806b9947b8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79565 314173 59300 0 7 0 syz-executor *79565 79009 59300 0 7 0x4000000 syz-executor 12041 386649 83313 0 3 0x80 nanoslp syz-executor 12041 519286 83313 0 3 0x4000080 kqsel syz-executor 12041 287525 83313 0 3 0x4000080 fsleep syz-executor 35054 404061 60030 0 3 0x80 nanoslp syz-executor 35054 188358 60030 0 3 0x4000000 biowait syz-executor 35054 336571 60030 0 3 0x4000080 fsleep syz-executor 93199 519016 83939 0 3 0x80 nanoslp syz-executor 93199 522439 83939 0 3 0x4000080 kqread syz-executor 93199 143713 83939 0 3 0x4000080 fsleep syz-executor 93199 86391 83939 0 3 0x4000080 fsleep syz-executor 95826 134513 0 0 3 0x14200 acct acct 67518 420782 0 0 3 0x14200 bored sosplice 83313 473564 88773 0 3 0x82 nanoslp syz-executor 90651 72607 88773 0 3 0x82 nanoslp syz-executor 16243 90699 88773 0 3 0x82 wait syz-executor 83939 419828 88773 0 3 0x82 nanoslp syz-executor 59300 471573 88773 0 3 0x82 nanoslp syz-executor 60030 291848 88773 0 3 0x82 nanoslp syz-executor 61784 2128 88773 0 3 0x82 wait syz-executor 97011 342191 88773 0 3 0x82 nanoslp syz-executor 88773 177714 83948 0 3 0x82 kqread syz-executor 83948 22729 57633 0 3 0x10008a sigsusp ksh 57633 424088 48311 0 3 0x98 kqread sshd-session 48311 220673 27947 0 3 0x92 kqread sshd-session 99211 481017 1 0 3 0x100083 ttyin getty 27947 284977 1 0 3 0x88 kqread sshd 45533 508300 57106 74 3 0x1100092 bpf pflogd 57106 41368 1 0 3 0x80 sbwait pflogd 21822 20018 38234 73 3 0x1100090 kqread syslogd 38234 313631 1 0 3 0x100082 sbwait syslogd 6609 277228 1 0 3 0x100080 kqread resolvd 34394 298970 56641 77 3 0x100092 kqread dhcpleased 56823 412439 56641 77 3 0x100092 kqread dhcpleased 56641 181677 1 0 3 0x80 kqread dhcpleased 60714 103040 0 0 3 0x14200 bored smr 6920 313677 0 0 3 0x14200 pgzero zerothread 37255 253599 0 0 3 0x14200 aiodoned aiodoned 5411 250218 0 0 3 0x14200 syncer update 24747 213641 0 0 3 0x14200 cleaner cleaner 14849 255899 0 0 3 0x14200 reaper reaper 66927 487325 0 0 3 0x14200 pgdaemon pagedaemon 35494 249423 0 0 3 0x14200 bored viomb 36237 110521 0 0 3 0x40014200 acpi0 acpi0 29799 491209 0 0 3 0x40014200 idle1 22309 119109 0 0 3 0x14200 bored softnet7 53206 178754 0 0 3 0x14200 bored softnet6 88988 70833 0 0 3 0x14200 bored softnet5 36858 147260 0 0 3 0x14200 bored softnet4 75964 276724 0 0 3 0x14200 bored softnet3 43681 148264 0 0 3 0x14200 bored softnet2 98503 306713 0 0 3 0x14200 bored softnet1 64024 65460 0 0 3 0x14200 bored softnet0 56126 166115 0 0 3 0x14200 bored systqmp 4694 309101 0 0 3 0x14200 bored systq 49618 80533 0 0 3 0x14200 tmoslp softclockmp 92725 265509 0 0 3 0x40014200 tmoslp softclock 59597 265636 0 0 3 0x40014200 idle0 1 194667 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 (0xffffffff839b9080) #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:746 #7 Xsyscall+0x128 Process 79565 (syz-executor) thread 0xffff8000338082b8 (79009) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839b0a48) #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:746 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839b9080) #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:746 #7 Xsyscall+0x128 Process 35054 (syz-executor) thread 0xffff8000ffff34d0 (188358) exclusive rrwlock inode r = 0 (0xfffffd806e2c9c50) #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:746 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10236 11043K 11212K 166960K 11746 0 pcb 17 13K 14K 166960K 178 0 rtable 200 9K 10K 166960K 329 0 pf 35 17K 25K 166960K 99 0 ifaddr 37 6K 7K 166960K 63 0 ifgroup 55 2K 2K 166960K 96 0 sysctl 3 1K 9K 166960K 9 0 counters 68 36K 38K 166960K 124 0 ioctlops 0 0K 4K 166960K 1663 0 iov 0 0K 20K 166960K 34 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1374 86K 87K 166960K 1750 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 12 1K 1K 166960K 24 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 588 0 sigio 0 0K 0K 166960K 12 0 proc 75 131K 164K 166960K 593 0 subproc 72 4K 4K 166960K 75 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 146 0 in_multi 77 5K 7K 166960K 115 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 484 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 254 160K 170K 166960K 7168 0 UVM aobj 16 2K 2K 166960K 18 0 pinsyscall 43 86K 103K 166960K 1711 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 32 0 NDP 12 0K 2K 166960K 42 0 temp 48 8644K 8712K 166960K 17428 0 kqueue 15 24K 31K 166960K 121 0 SYN cache 2 8K 16K 166960K 3 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 73 0 70 1 0 1 1 0 8 0 rtentry 176 105 0 25 5 0 5 5 0 8 0 unpcb 144 547 0 528 6 2 4 6 0 8 3 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 323 0 250 12 4 8 8 0 8 0 arp 136 13 0 4 1 0 1 1 0 8 0 inpcb 328 810 0 732 13 3 10 10 0 8 3 nd6 144 19 0 4 1 0 1 1 0 8 0 pkpcb 40 34 0 34 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 23 0 23 1 0 1 1 0 8 1 pppxif 1504 3 0 3 1 0 1 1 0 8 1 pfstscr 40 65 0 64 1 0 1 1 0 8 0 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 2 0 2 1 0 1 1 0 8 1 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 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 55 0 1 1 0 1 1 0 8 0 pfstkey 128 183 0 129 2 0 2 2 0 8 0 pfstate 384 118 0 65 6 0 6 6 0 8 0 pfrule 1344 29 0 24 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 461 0 100 28 1 27 28 0 8 2 art_table 40 462 0 100 5 0 5 5 0 8 0 art_node 32 105 0 33 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 22 0 12 1 0 1 1 0 8 0 shmpl 112 15 0 2 1 0 1 1 0 8 0 pool(0xffffffff839b9068:shmpl): page inconsistency: page 0xfffffd8077c3f000; 21 on list, 13 missing, 35 items per page dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2494 0 985 96 0 96 96 0 8 0 ffsino 296 2494 0 985 118 0 118 118 0 8 0 nchpl 144 3398 0 2806 63 39 24 63 0 8 0 rtmask 32 6 0 6 1 0 1 1 0 8 1 uvmvnodes 80 2737 0 0 56 0 56 56 0 8 0 vnodes 216 2737 0 0 153 0 153 153 0 8 0 namei 1024 11410 0 11410 2 1 1 2 0 8 1 percpumem 16 77 0 28 1 0 1 1 0 8 0 kstatmem 264 56 0 28 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 17144 0 17143 6 3 3 4 1 8 2 plimitpl 152 283 0 265 1 0 1 1 0 8 0 sigapl 424 905 0 849 7 0 7 7 0 8 0 knotepl 120 541 0 0 18 1 17 18 0 8 0 kqueuepl 224 241 0 163 5 0 5 5 0 8 0 pipepl 344 403 0 375 14 9 5 14 0 8 2 fdescpl 528 881 0 849 3 0 3 3 0 8 0 filepl 160 6272 0 5910 23 6 17 20 0 8 1 lockfpl 104 161 0 159 1 0 1 1 0 8 0 lockfspl 48 66 0 64 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 926 0 912 1 0 1 1 0 8 0 zombiepl 144 853 0 849 1 0 1 1 0 8 0 processpl 1232 905 0 849 5 0 5 5 0 8 0 procpl 664 1743 0 1679 7 1 6 7 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 752 1480 0 1380 24 10 14 20 0 8 3 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 36 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 667 0 0 42 0 42 42 0 8 0 bufpl 280 7202 0 1059 440 0 440 440 0 8 0 anonpl 32 10110 0 0 82 0 82 82 0 246 0 amapchunkpl 152 23971 0 23415 31 4 27 28 0 158 5 amappl16 200 3514 0 3358 19 5 14 19 0 8 5 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 118 0 105 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 1545 0 1513 3 1 2 2 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 256 0 256 1 1 0 1 0 8 0 amappl8 136 29 0 26 1 0 1 1 0 8 0 amappl7 128 126 0 114 1 0 1 1 0 8 0 amappl6 120 182 0 179 1 0 1 1 0 8 0 amappl5 112 134 0 124 1 0 1 1 0 8 0 amappl4 104 311 0 291 1 0 1 1 0 8 0 amappl3 96 3970 0 3863 3 0 3 3 0 8 0 amappl2 88 1122 0 1040 2 0 2 2 0 8 0 amappl1 80 10279 0 9671 15 1 14 15 0 8 0 amappl 88 6392 0 6210 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 dma512 512 1 0 1 1 0 1 1 0 8 1 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 9 0 9 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 17 0 2 1 0 1 1 0 8 0 uaddrrnd 24 881 0 849 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 881 0 849 1 0 1 1 0 8 0 vmmpekpl 168 9725 0 9688 3 0 3 3 0 8 0 vmmpepl 168 62067 0 59889 104 0 104 104 0 357 7 vmsppl 488 880 0 849 5 1 4 5 0 8 0 rwobjpl 80 21965 0 18127 79 0 79 79 0 8 0 pdppl 4096 1769 0 1698 101 30 71 83 0 8 0 pvpl 32 18593 0 0 151 1 150 150 0 265 0 pmappl 256 880 0 849 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 315 0 39 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83862ff0) 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(ffffffff839b0840) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b0840) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002ec015f0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x768a6e8a5b50, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83862ff0) 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(ffffffff839b0840) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b0840) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002ec015f0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x768a6e8a5b50, 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:438 panic(ffffffff8336bd01) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839b9068,1,ffff80003c438e28) at pool_do_get+0x5df pool_get(ffffffff839b9068,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000338082b8,ffff80003c439080,5a,ffff80003c438fd0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000338082b8,ffff80003c439080,ffff80003c438fd0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c439080) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439080) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xac1e931d8a0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336bd01) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839b9068,1,ffff80003c438e28) at pool_do_get+0x5df pool_get(ffffffff839b9068,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000338082b8,ffff80003c439080,5a,ffff80003c438fd0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000338082b8,ffff80003c439080,ffff80003c438fd0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c439080) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439080) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xac1e931d8a0, count: -8