panic: pool_do_get: shmpl free list modified: page 0xfffffd8069dd9000; item addr 0xfffffd8069dd9850; offset 0x40=0x68c20a8a Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *202315 41731 32767 0x10 0x4000000 1 syz-executor 384094 47645 0 0x14000 0x200 0 softnet0 db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833670e4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838af270,2,ffff80002ebdafe8) at pool_do_get+0x5df pool_get(ffffffff838af270,2) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff800037c207f0,ffff80002ebdb240,4b,ffff80002ebdb190) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff800037c207f0,ffff80002ebdb240,ffff80002ebdb190) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80002ebdb240) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ebdb240) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcb6433a22c0, 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 0xfffffd8069dd9000; item addr 0xfffffd8069dd9850; offset 0x40=0x68c20a8a ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833670e4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838af270,2,ffff80002ebdafe8) at pool_do_get+0x5df pool_get(ffffffff838af270,2) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff800037c207f0,ffff80002ebdb240,4b,ffff80002ebdb190) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff800037c207f0,ffff80002ebdb240,ffff80002ebdb190) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80002ebdb240) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ebdb240) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcb6433a22c0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002ebdae10 rbx 0xffff8000299eeddf rdx 0xffff800001436e80 rcx 0xffff800037c207f0 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x7cbf33620a3a04cc r11 0xb251bc21b47bc773 r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff8299bd95 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002ebdae00 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=202315 pid=41731 tcnt=2 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=0xffff800037c21a18,0xffffffff83945738 process=0xffff800037c121d0 user=0xffff80002ebd6000, vmspace=0xfffffd8069fcd3f8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 41731 88787 96116 32767 2 0x10 syz-executor *41731 202315 96116 32767 7 0x4000010 syz-executor 52901 97250 256 32767 3 0x90 nanoslp syz-executor 52901 169334 256 32767 3 0x4000090 ttyin syz-executor 52901 163341 256 32767 3 0x4000090 fsleep syz-executor 68227 79255 39448 32767 3 0x90 nanoslp syz-executor 68227 272172 39448 32767 3 0x4000090 sbwait syz-executor 68227 515598 39448 32767 3 0x4000090 sbwait syz-executor 68227 40501 39448 32767 3 0x4000090 fsleep syz-executor 59934 220141 0 0 3 0x14200 bored sosplice 28521 338228 23231 32767 3 0x10 getblk syz-executor 14706 428543 80758 32767 3 0x90 wait syz-executor 94647 410129 29912 32767 3 0x10 getblk syz-executor 36518 262185 10357 32767 3 0x10 biowait syz-executor 256 185810 85882 32767 3 0x90 nanoslp syz-executor 90434 404996 83169 32767 3 0x90 nanoslp syz-executor 96116 263119 94216 32767 3 0x90 nanoslp syz-executor 39448 455516 11230 32767 3 0x90 nanoslp syz-executor 23231 433191 75884 0 3 0x82 wait syz-executor 80758 225851 75884 0 3 0x82 wait syz-executor 29912 276655 75884 0 3 0x82 wait syz-executor 85882 267430 75884 0 3 0x82 wait syz-executor 10357 43848 75884 0 3 0x82 wait syz-executor 83169 402885 75884 0 3 0x82 wait syz-executor 94216 443655 75884 0 3 0x82 wait syz-executor 11230 426438 75884 0 3 0x82 wait syz-executor 75884 101554 53835 0 2 0x82 syz-executor 53835 18733 47533 0 3 0x10008a sigsusp ksh 47533 424293 15392 0 3 0x98 kqread sshd-session 15392 121429 78176 0 3 0x92 kqread sshd-session 9098 174890 1 0 3 0x100083 ttyin getty 78176 378050 1 0 3 0x88 kqread sshd 86977 150990 39583 73 3 0x1100090 kqread syslogd 39583 465572 1 0 3 0x100082 sbwait syslogd 42425 258831 1 0 3 0x100080 kqread resolvd 47194 482321 90922 77 3 0x100092 kqread dhcpleased 93328 72074 90922 77 3 0x100092 kqread dhcpleased 90922 247038 1 0 3 0x80 kqread dhcpleased 54163 307991 0 0 3 0x14200 bored smr 84302 408335 0 0 3 0x14200 pgzero zerothread 57639 46659 0 0 3 0x14200 aiodoned aiodoned 82140 285566 0 0 3 0x14200 syncer update 89753 292919 0 0 3 0x14200 cleaner cleaner 24795 277309 0 0 3 0x14200 reaper reaper 5180 302338 0 0 3 0x14200 pgdaemon pagedaemon 87205 266010 0 0 3 0x14200 bored viomb 29596 138884 0 0 3 0x40014200 acpi0 acpi0 6927 389733 0 0 3 0x40014200 idle1 81880 464526 0 0 3 0x14200 bored softnet1 47645 384094 0 0 7 0x14200 softnet0 40051 464865 0 0 3 0x14200 bored systqmp 96729 317630 0 0 3 0x14200 bored systq 7375 101245 0 0 3 0x14200 tmoslp softclockmp 88355 267066 0 0 3 0x40014200 tmoslp softclock 37848 501557 0 0 3 0x40014200 idle0 1 339850 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 (0xffffffff838af288) #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 41731 (syz-executor) thread 0xffff800037c207f0 (202315) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8394a9c0) #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 (0xffffffff838af288) #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 28521 (syz-executor) thread 0xffff800037c027e8 (338228) exclusive rrwlock inode r = 0 (0xfffffd806c287a10) #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:746 #9 Xsyscall+0x128 Process 94647 (syz-executor) thread 0xffff800037c03a10 (410129) exclusive rrwlock inode r = 0 (0xfffffd806c2870d0) #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:746 #9 Xsyscall+0x128 Process 36518 (syz-executor) thread 0xffff8000fffefa08 (262185) exclusive rrwlock inode r = 0 (0xfffffd806f54c8e0) #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:746 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10196 10956K 10966K 166960K 11280 0 pcb 17 14K 16K 166960K 19 0 rtable 211 6K 6K 166960K 335 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 8 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 41 0 iov 0 0K 16K 166960K 20 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1475 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 45 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 23 85K 121K 166960K 573 0 sigio 0 0K 0K 166960K 7 0 proc 58 99K 131K 166960K 521 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 0 0K 0K 166960K 152 0 in_multi 99 7K 7K 166960K 113 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 115 519K 519K 166960K 115 0 exec 0 0K 1K 166960K 446 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 6889 0 UVM aobj 29 3K 4K 166960K 33 0 pinsyscall 44 88K 108K 166960K 1615 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 45 0 NDP 11 0K 2K 166960K 27 0 temp 52 8642K 8706K 166960K 6045 0 kqueue 14 22K 34K 166960K 142 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 120 171 0 168 3 0 3 3 0 8 2 rtentry 176 105 0 8 5 0 5 5 0 8 0 unpcb 144 517 0 499 7 0 7 7 0 8 6 syncache 336 8 0 8 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 359 0 354 9 2 7 7 0 8 6 arp 136 11 0 0 1 0 1 1 0 8 0 ipq 40 5 0 1 1 0 1 1 0 8 0 ipqe 40 8 0 3 1 0 1 1 0 8 0 inpcb 328 956 0 948 13 4 9 13 0 8 8 ip6q 72 2 0 1 1 0 1 1 0 8 0 ip6af 40 4 0 3 1 0 1 1 0 8 0 nd6 144 25 0 7 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 256 468 0 18 29 0 29 29 0 8 0 art_table 40 469 0 18 5 0 5 5 0 8 0 art_node 32 105 0 18 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 42 0 32 1 0 1 1 0 8 0 shmpl 112 30 0 4 1 0 1 1 0 8 0 pool(0xffffffff838af270:shmpl): page inconsistency: page 0xfffffd8069dd9000; 8 on list, 26 missing, 35 items per page dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2288 0 784 95 0 95 95 0 8 0 ffsino 296 2288 0 784 117 0 117 117 0 8 0 nchpl 144 3128 0 1451 63 0 63 63 0 8 0 uvmvnodes 80 2369 0 0 49 0 49 49 0 8 0 vnodes 216 2369 0 0 132 0 132 132 0 8 0 namei 1024 10124 0 10121 2 1 1 2 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 10654 0 10653 11 5 6 8 1 8 5 plimitpl 152 104 0 77 2 0 2 2 0 8 0 sigapl 424 855 0 803 7 0 7 7 0 8 0 knotepl 120 799 0 0 25 0 25 25 0 8 0 kqueuepl 224 325 0 314 6 1 5 5 0 8 4 pipepl 344 147 0 120 3 0 3 3 0 8 0 fdescpl 528 838 0 803 3 0 3 3 0 8 0 filepl 160 5406 0 5184 19 0 19 19 0 8 7 lockfpl 104 111 0 109 1 0 1 1 0 8 0 lockfspl 48 40 0 38 1 0 1 1 0 8 0 sessionpl 144 25 0 9 1 0 1 1 0 8 0 pgrppl 48 49 0 25 1 0 1 1 0 8 0 ucredpl 104 1015 0 996 1 0 1 1 0 8 0 zombiepl 144 805 0 803 1 0 1 1 0 8 0 processpl 1232 855 0 803 5 0 5 5 0 8 0 procpl 664 1623 0 1565 7 0 7 7 0 8 0 sosppl 168 4 0 4 1 0 1 1 0 8 1 sockpl 752 1686 0 1657 34 22 12 21 0 8 8 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 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 118 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1267 0 0 80 0 80 80 0 8 0 bufpl 280 3742 0 116 259 0 259 259 0 8 0 anonpl 32 9815 0 0 80 0 80 80 0 246 0 amapchunkpl 152 22812 0 22223 36 4 32 32 0 158 6 amappl16 200 3283 0 3031 23 6 17 17 0 8 3 amappl15 192 8 0 8 2 2 0 1 0 8 0 amappl14 184 112 0 102 1 0 1 1 0 8 0 amappl13 176 38 0 38 1 1 0 1 0 8 0 amappl12 168 1450 0 1415 3 1 2 3 0 8 0 amappl11 160 41 0 31 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 149 0 139 1 0 1 1 0 8 0 amappl6 120 175 0 172 1 0 1 1 0 8 0 amappl5 112 113 0 106 1 0 1 1 0 8 0 amappl4 104 297 0 282 1 0 1 1 0 8 0 amappl3 96 3688 0 3583 4 0 4 4 0 8 0 amappl2 88 1131 0 1050 2 0 2 2 0 8 0 amappl1 80 10432 0 9866 14 0 14 14 0 8 0 amappl 88 6136 0 5947 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 32 0 4 1 0 1 1 0 8 0 uaddrrnd 24 838 0 803 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 838 0 803 1 0 1 1 0 8 0 vmmpekpl 168 8420 0 8382 3 0 3 3 0 8 0 vmmpepl 168 59615 0 57355 113 1 112 112 0 357 6 vmsppl 488 837 0 803 7 2 5 6 0 8 0 rwobjpl 80 20946 0 17460 72 0 72 72 0 8 0 pdppl 4096 1684 0 1606 114 30 84 96 0 8 6 pvpl 32 18009 0 0 148 2 146 147 0 265 0 pmappl 256 837 0 803 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 365 0 37 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8378aff0) 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 msleep_nsec(ffff80000002c000,ffff80002a220288,f2871d713fb16fbd,ffff80002a2202b8,ffff80000002c000) at msleep_nsec+0x10 sys/kern/kern_synch.c:177 taskq_thread(ffff80000002c000) at taskq_thread+0x1d5 sys/kern/kern_task.c:439 end trace frame: 0x0, count: 10 ddb{0}> trace x86_ipi_db(ffffffff8378aff0) 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 msleep_nsec(ffff80000002c000,ffff80002a220288,f2871d713fb16fbd,ffff80002a2202b8,ffff80000002c000) at msleep_nsec+0x10 sys/kern/kern_synch.c:177 taskq_thread(ffff80000002c000) at taskq_thread+0x1d5 sys/kern/kern_task.c:439 end trace frame: 0x0, count: -5 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(ffffffff833670e4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838af270,2,ffff80002ebdafe8) at pool_do_get+0x5df pool_get(ffffffff838af270,2) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff800037c207f0,ffff80002ebdb240,4b,ffff80002ebdb190) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff800037c207f0,ffff80002ebdb240,ffff80002ebdb190) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80002ebdb240) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ebdb240) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcb6433a22c0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833670e4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838af270,2,ffff80002ebdafe8) at pool_do_get+0x5df pool_get(ffffffff838af270,2) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff800037c207f0,ffff80002ebdb240,4b,ffff80002ebdb190) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff800037c207f0,ffff80002ebdb240,ffff80002ebdb190) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80002ebdb240) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ebdb240) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcb6433a22c0, count: -8