panic: pool_do_get: shmpl free list modified: page 0xfffffd80675b4000; item addr 0xfffffd80675b4b60; offset 0x40=0x68408fdd Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *379491 49933 32767 0x10 0x4000000 1K syz-executor 203279 4527 32767 0x10 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833ce8a4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839688e8,1,ffff80002a31a678) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839688e8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4442b8,ffff80002a31a8d0,29,ffff80002a31a820) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4442b8,ffff80002a31a8d0,ffff80002a31a820) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a31a8d0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a31a8d0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5ff64447c60, 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 0xfffffd80675b4000; item addr 0xfffffd80675b4b60; offset 0x40=0x68408fdd ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833ce8a4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839688e8,1,ffff80002a31a678) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839688e8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4442b8,ffff80002a31a8d0,29,ffff80002a31a820) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4442b8,ffff80002a31a8d0,ffff80002a31a820) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a31a8d0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a31a8d0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5ff64447c60, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a31a4b0 rbx 0xffff8000299dedd7 rdx 0xffff80000147eb40 rcx 0xffff80003c4442b8 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x83f0cdc93016a1ae r11 0x441df08a52d879fc r12 0xffff8000299debd8 r13 0 r14 0 r15 0x1 rip 0xffffffff81a737d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a31a4a0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=379491 pid=49933 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=66, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c444028,0xffff80003c4454b8 process=0xffff80003c0104f8 user=0xffff80002a315000, vmspace=0xfffffd800b026960 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49933 512273 52376 32767 2 0x10 syz-executor *49933 379491 52376 32767 7 0x4000010 syz-executor 4527 203279 96329 32767 7 0x10 syz-executor 4527 103733 96329 32767 3 0x4000090 kqsel syz-executor 4527 8854 96329 32767 3 0x4000090 fsleep syz-executor 76031 17527 3499 0 2 0x2 syz-executor 28198 177018 56174 32767 3 0x90 nanoslp syz-executor 28198 373314 56174 32767 3 0x4000090 ttyin syz-executor 28198 225593 56174 32767 3 0x4000090 fsleep syz-executor 52376 78423 86968 32767 3 0x90 nanoslp syz-executor 86968 307252 3499 0 3 0x82 wait syz-executor 1567 405434 0 0 3 0x14200 bored sosplice 56174 384902 46901 32767 3 0x90 nanoslp syz-executor 5694 390270 32762 32767 3 0x90 piperd syz-executor 96329 233647 72818 32767 3 0x90 nanoslp syz-executor 24728 158639 28139 32767 3 0x10 biowait syz-executor 40246 403410 10530 32767 3 0x90 piperd syz-executor 32762 106563 3499 0 3 0x82 wait syz-executor 46901 432925 3499 0 3 0x82 wait syz-executor 72818 65509 3499 0 3 0x82 wait syz-executor 28139 76804 3499 0 3 0x82 wait syz-executor 10530 189992 3499 0 3 0x82 wait syz-executor 3499 345370 62853 0 3 0x82 nanoslp syz-executor 62853 27861 50312 0 3 0x10008a sigsusp ksh 50312 367968 23605 0 3 0x98 kqread sshd-session 23605 512252 11039 0 3 0x92 kqread sshd-session 74541 297858 1 0 3 0x100083 ttyin getty 11039 390233 1 0 3 0x88 kqread sshd 91452 394400 86021 73 3 0x1100090 kqread syslogd 86021 265740 1 0 3 0x100082 sbwait syslogd 29870 403559 1 0 3 0x100080 kqread resolvd 96122 389471 33895 77 3 0x100092 kqread dhcpleased 98194 284276 33895 77 3 0x100092 kqread dhcpleased 33895 453801 1 0 3 0x80 kqread dhcpleased 71567 142680 0 0 3 0x14200 bored smr 87482 116751 0 0 2 0x14200 zerothread 6034 165905 0 0 3 0x14200 aiodoned aiodoned 13742 149509 0 0 3 0x14200 syncer update 58122 26990 0 0 3 0x14200 cleaner cleaner 26050 60616 0 0 3 0x14200 reaper reaper 70216 40577 0 0 3 0x14200 pgdaemon pagedaemon 16757 36079 0 0 3 0x14200 bored viomb 60427 219630 0 0 3 0x40014200 acpi0 acpi0 77575 329890 0 0 3 0x40014200 idle1 26283 34234 0 0 3 0x14200 bored softnet3 56676 375075 0 0 3 0x14200 bored softnet2 70481 419312 0 0 3 0x14200 bored softnet1 59408 270429 0 0 3 0x14200 bored softnet0 73023 116579 0 0 3 0x14200 bored systqmp 59982 288129 0 0 3 0x14200 bored systq 22103 508800 0 0 3 0x14200 tmoslp softclockmp 75907 231355 0 0 3 0x40014200 tmoslp softclock 90524 497085 0 0 3 0x40014200 idle0 1 293430 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 (0xffffffff83968900) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:296 #2 mtx_enter+0x62 sys/kern/kern_lock.c:253 #3 pool_get+0x10b sys/kern/subr_pool.c:578 #4 shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 Process 49933 (syz-executor) thread 0xffff80003c4442b8 (379491) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83959800) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:579 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83968900) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:296 #2 mtx_enter+0x62 sys/kern/kern_lock.c:253 #3 pool_get+0x10b sys/kern/subr_pool.c:578 #4 shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 Process 24728 (syz-executor) thread 0xffff80002a297498 (158639) exclusive rrwlock inode r = 0 (0xfffffd806c2dc9a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1864 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c6bb670) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1864 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10183 10950K 10966K 166960K 11269 0 pcb 17 12K 12K 166960K 17 0 rtable 192 5K 7K 166960K 402 0 pf 27 16K 16K 166960K 33 0 ifaddr 34 6K 7K 166960K 48 0 ifgroup 42 1K 2K 166960K 54 0 sysctl 1 1K 9K 166960K 5 0 counters 64 36K 36K 166960K 70 0 ioctlops 0 0K 2K 166960K 32 0 iov 0 0K 20K 166960K 19 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1549 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 125K 166960K 383 0 sigio 0 0K 0K 166960K 2 0 proc 58 79K 115K 166960K 524 0 subproc 56 3K 4K 166960K 263 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 24 0 in_multi 77 5K 7K 166960K 110 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 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 391 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 204 158K 186K 166960K 4465 0 UVM aobj 7 2K 2K 166960K 9 0 pinsyscall 39 78K 114K 166960K 1446 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 9 0 NDP 11 0K 2K 166960K 30 0 temp 37 8684K 8748K 166960K 4968 0 kqueue 13 20K 24K 166960K 46 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 65 0 61 1 0 1 1 0 8 0 rtentry 176 124 0 35 6 0 6 6 0 8 1 unpcb 144 158 0 143 2 0 2 2 0 8 1 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 808 64 0 56 2 0 2 2 0 8 1 arp 128 21 0 7 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 263 0 252 4 0 4 4 0 8 2 nd6 144 28 0 9 1 0 1 1 0 8 0 kcovpl 48 29 0 23 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 499 0 133 29 0 29 29 0 8 5 art_table 32 500 0 133 4 0 4 4 0 8 0 art_node 16 123 0 42 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 5 1 0 1 1 0 8 0 semapl 112 11 0 1 1 0 1 1 0 8 0 shmpl 112 6 0 2 1 0 1 1 0 8 0 pool(0xffffffff839688e8:shmpl): page inconsistency: page 0xfffffd80675b4000; 30 on list, 4 missing, 35 items per page dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1790 0 256 96 0 96 96 0 8 0 ffsino 288 1790 0 256 110 0 110 110 0 8 0 nchpl 144 2207 0 507 64 0 64 64 0 8 0 uvmvnodes 80 2062 0 0 43 0 43 43 0 8 0 vnodes 216 2062 0 0 115 0 115 115 0 8 0 namei 1024 7272 0 7272 1 0 1 1 0 8 1 percpumem 16 50 0 3 1 0 1 1 0 8 0 kstatmem 264 26 0 6 2 0 2 2 0 8 0 scxspl 216 7764 0 7763 4 1 3 3 1 8 2 plimitpl 152 96 0 75 2 0 2 2 0 8 1 sigapl 424 622 0 573 8 0 8 8 0 8 1 knotepl 120 306 0 0 10 0 10 10 0 8 0 kqueuepl 224 60 0 50 1 0 1 1 0 8 0 pipepl 336 184 0 157 3 0 3 3 0 8 0 fdescpl 520 603 0 573 4 0 4 4 0 8 1 filepl 160 2702 0 2509 11 0 11 11 0 8 2 lockfpl 104 36 0 34 1 0 1 1 0 8 0 lockfspl 48 17 0 15 1 0 1 1 0 8 0 sessionpl 144 45 0 31 1 0 1 1 0 8 0 pgrppl 48 81 0 60 1 0 1 1 0 8 0 ucredpl 104 273 0 256 1 0 1 1 0 8 0 zombiepl 144 573 0 573 1 0 1 1 0 8 1 processpl 1240 622 0 573 5 0 5 5 0 8 0 procpl 656 889 0 835 7 0 7 7 0 8 1 sockpl 728 486 0 450 7 0 7 7 0 8 2 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 238 0 0 15 0 15 15 0 8 0 bufpl 280 2855 0 116 196 0 196 196 0 8 0 anonpl 32 5274 0 0 43 0 43 43 0 246 0 amapchunkpl 152 13642 0 13239 26 0 26 26 0 158 5 amappl16 200 2172 0 2156 5 2 3 5 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 111 0 101 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1233 0 1203 2 0 2 2 0 8 0 amappl11 160 48 0 37 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 24 0 23 1 0 1 1 0 8 0 amappl7 128 100 0 90 1 0 1 1 0 8 0 amappl6 120 187 0 184 1 0 1 1 0 8 0 amappl5 112 117 0 111 1 0 1 1 0 8 0 amappl4 104 298 0 282 1 0 1 1 0 8 0 amappl3 96 2358 0 2265 4 0 4 4 0 8 0 amappl2 88 645 0 589 2 0 2 2 0 8 0 amappl1 80 9568 0 9023 14 0 14 14 0 8 0 amappl 88 3751 0 3611 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 8 0 2 1 0 1 1 0 8 0 uaddrrnd 24 603 0 573 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 603 0 573 1 0 1 1 0 8 0 vmmpekpl 168 7009 0 6964 3 0 3 3 0 8 0 vmmpepl 168 44952 0 43183 99 0 99 99 0 357 13 vmsppl 480 602 0 573 7 1 6 6 0 8 1 rwobjpl 72 17036 0 14193 53 0 53 53 0 8 1 pdppl 4096 1213 0 1146 115 38 77 97 0 8 10 pvpl 32 12964 0 0 106 1 105 106 0 265 0 pmappl 256 602 0 573 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 405 0 41 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83859ff0) 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(ffffffff839595f8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:129 [inline] __mp_lock(ffffffff839595f8) at __mp_lock+0x192 sys/kern/kern_lock.c:160 intr_handler(ffff80003c0083c0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7757834d67c0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83859ff0) 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(ffffffff839595f8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:129 [inline] __mp_lock(ffffffff839595f8) at __mp_lock+0x192 sys/kern/kern_lock.c:160 intr_handler(ffff80003c0083c0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7757834d67c0, 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(ffffffff833ce8a4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839688e8,1,ffff80002a31a678) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839688e8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4442b8,ffff80002a31a8d0,29,ffff80002a31a820) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4442b8,ffff80002a31a8d0,ffff80002a31a820) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a31a8d0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a31a8d0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5ff64447c60, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833ce8a4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839688e8,1,ffff80002a31a678) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839688e8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4442b8,ffff80002a31a8d0,29,ffff80002a31a820) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4442b8,ffff80002a31a8d0,ffff80002a31a820) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a31a8d0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a31a8d0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5ff64447c60, count: -8