panic: pool_do_get: shmpl free list modified: page 0xfffffd8068cab000; item addr 0xfffffd8068cab700; offset 0x40=0x68b06e81 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 470998 54052 32767 0x10 0 0 syz-executor *351633 54052 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83367500) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838d5228,1,ffff80003a84b868) at pool_do_get+0x5df pool_get(ffffffff838d5228,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2e2fb0,ffff80003a84bac0,2,ffff80003a84ba10) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2e2fb0,ffff80003a84bac0,ffff80003a84ba10) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003a84bac0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a84bac0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x35951d4ef40, 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 0xfffffd8068cab000; item addr 0xfffffd8068cab700; offset 0x40=0x68b06e81 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83367500) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838d5228,1,ffff80003a84b868) at pool_do_get+0x5df pool_get(ffffffff838d5228,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2e2fb0,ffff80003a84bac0,2,ffff80003a84ba10) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2e2fb0,ffff80003a84bac0,ffff80003a84ba10) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003a84bac0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a84bac0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x35951d4ef40, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003a84b690 rbx 0xffff8000299eeddf rdx 0xffff800001465440 rcx 0xffff80002a2e2fb0 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xa66cb5278dc0f6ca r11 0x26d3ebe916afa680 r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff82d888f5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003a84b680 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=351633 pid=54052 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2e2d18,0xffffffff8398cdc0 process=0xffff80003c479d10 user=0xffff80003a846000, vmspace=0xfffffd806bc08b90 estcpu=5, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54052 470998 87370 32767 7 0x10 syz-executor *54052 351633 87370 32767 7 0x4000010 syz-executor 56897 281169 73278 32767 2 0x10 syz-executor 56897 178769 73278 32767 3 0x4000090 fsleep syz-executor 27104 76518 11269 32767 2 0x10 syz-executor 27104 509823 11269 32767 3 0x4000090 fsleep syz-executor 9041 330326 36925 32767 2 0x10 syz-executor 9041 89903 36925 32767 3 0x4000090 fsleep syz-executor 41518 438786 86551 32767 2 0x10 syz-executor 41518 207523 86551 32767 3 0x4000090 fsleep syz-executor 41518 18987 86551 32767 3 0x4000090 fsleep syz-executor 7098 126727 11339 32767 2 0x10 syz-executor 7098 516438 11339 32767 2 0x4000010 syz-executor 66242 317883 86163 0 2 0x10000002 syz-executor 96022 246097 0 0 3 0x14200 bored sosplice 11269 309163 74882 32767 3 0x90 nanoslp syz-executor 73278 394572 27877 32767 3 0x90 nanoslp syz-executor 87370 246425 19001 32767 3 0x90 nanoslp syz-executor 36925 219450 18441 32767 3 0x90 nanoslp syz-executor 11339 199650 41815 32767 3 0x90 nanoslp syz-executor 86551 47503 23762 32767 3 0x90 nanoslp syz-executor 13923 420519 6114 32767 3 0x10 biowait syz-executor 27877 220036 86163 0 3 0x82 wait syz-executor 74882 218462 86163 0 3 0x82 wait syz-executor 18441 32395 86163 0 3 0x82 wait syz-executor 19001 513409 86163 0 3 0x82 wait syz-executor 23762 367507 86163 0 3 0x82 wait syz-executor 41815 62275 86163 0 3 0x82 wait syz-executor 6114 250293 86163 0 3 0x82 wait syz-executor 86163 363973 88045 0 2 0x2 syz-executor 88045 434239 45737 0 3 0x10008a sigsusp ksh 45737 357697 10707 0 3 0x98 kqread sshd-session 10707 295891 42970 0 3 0x92 kqread sshd-session 18194 155940 1 0 3 0x100083 ttyin getty 42970 169481 1 0 3 0x88 kqread sshd 91833 7542 55431 73 3 0x1100090 kqread syslogd 55431 37742 1 0 3 0x100082 sbwait syslogd 8273 295413 1 0 3 0x100080 kqread resolvd 42028 24167 66834 77 3 0x100092 kqread dhcpleased 69220 213797 66834 77 3 0x100092 kqread dhcpleased 66834 64059 1 0 3 0x80 kqread dhcpleased 99718 496564 0 0 3 0x14200 bored smr 74260 397155 0 0 2 0x14200 zerothread 45794 114985 0 0 3 0x14200 aiodoned aiodoned 83714 273911 0 0 3 0x14200 syncer update 95574 322039 0 0 3 0x14200 cleaner cleaner 47931 63098 0 0 3 0x14200 reaper reaper 64656 219750 0 0 3 0x14200 pgdaemon pagedaemon 90115 204079 0 0 3 0x14200 bored viomb 11170 384346 0 0 3 0x40014200 acpi0 acpi0 77764 388199 0 0 3 0x40014200 idle1 8010 88137 0 0 3 0x14200 bored softnet7 70563 121852 0 0 3 0x14200 bored softnet6 9285 38037 0 0 3 0x14200 bored softnet5 40482 40614 0 0 3 0x14200 bored softnet4 34275 152478 0 0 3 0x14200 bored softnet3 21347 295782 0 0 3 0x14200 bored softnet2 55719 474726 0 0 3 0x14200 bored softnet1 54631 116488 0 0 3 0x14200 bored softnet0 67485 305715 0 0 3 0x14200 bored systqmp 44154 61633 0 0 3 0x14200 bored systq 70415 160309 0 0 3 0x14200 tmoslp softclockmp 16072 513748 0 0 3 0x40014200 tmoslp softclock 47497 244519 0 0 3 0x40014200 idle0 1 422803 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 (0xffffffff838d5240) #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 54052 (syz-executor) thread 0xffff80002a2e2fb0 (351633) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838d02f0) #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 (0xffffffff838d5240) #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 13923 (syz-executor) thread 0xffff8000ffff2fa0 (420519) exclusive rrwlock inode r = 0 (0xfffffd80687b5330) #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:746 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8074c7fb30) #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 10192 10954K 10968K 166960K 11273 0 pcb 17 12K 12K 166960K 17 0 rtable 191 5K 6K 166960K 270 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 12K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1478 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 56 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 23 85K 121K 166960K 312 0 sigio 0 0K 0K 166960K 1 0 proc 58 99K 147K 166960K 495 0 subproc 72 4K 4K 166960K 162 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 18 0 in_multi 88 6K 7K 166960K 100 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 364 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 237 167K 194K 166960K 4241 0 UVM aobj 9 2K 3K 166960K 11 0 pinsyscall 44 88K 112K 166960K 1349 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 11 0 NDP 10 0K 2K 166960K 27 0 temp 42 8644K 8708K 166960K 4439 0 kqueue 14 22K 28K 166960K 45 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 53 0 50 1 0 1 1 0 8 0 rtentry 176 98 0 11 5 0 5 5 0 8 0 unpcb 144 302 0 285 4 0 4 4 0 8 3 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpcb 736 72 0 67 2 0 2 2 0 8 1 arp 128 11 0 1 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 2 1 0 1 1 0 8 0 inpcb 328 211 0 200 4 0 4 4 0 8 2 nd6 144 18 0 3 1 0 1 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 441 0 44 28 0 28 28 0 8 1 art_table 40 442 0 44 5 0 5 5 0 8 0 art_node 32 98 0 20 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 54 0 44 1 0 1 1 0 8 0 shmpl 112 8 0 2 1 0 1 1 0 8 0 pool(0xffffffff838d5228:shmpl): page inconsistency: page 0xfffffd8068cab000; 28 on list, 6 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1773 0 256 95 0 95 95 0 8 0 ffsino 296 1773 0 256 117 0 117 117 0 8 0 nchpl 144 2134 0 447 63 0 63 63 0 8 0 uvmvnodes 80 1944 0 0 40 0 40 40 0 8 0 vnodes 216 1944 0 0 108 0 108 108 0 8 0 namei 1024 6582 0 6581 1 0 1 1 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 7721 0 7720 10 2 8 8 1 8 7 plimitpl 152 80 0 56 2 0 2 2 0 8 1 sigapl 424 580 0 521 8 0 8 8 0 8 0 knotepl 120 130 0 0 4 0 4 4 0 8 0 kqueuepl 224 69 0 59 2 0 2 2 0 8 1 pipepl 344 136 0 108 3 0 3 3 0 8 0 fdescpl 528 557 0 522 3 0 3 3 0 8 0 filepl 160 2517 0 2306 14 0 14 14 0 8 5 lockfpl 104 114 0 112 1 0 1 1 0 8 0 lockfspl 48 19 0 17 1 0 1 1 0 8 0 sessionpl 144 32 0 16 1 0 1 1 0 8 0 pgrppl 48 50 0 26 1 0 1 1 0 8 0 ucredpl 104 361 0 343 1 0 1 1 0 8 0 zombiepl 144 522 0 521 1 0 1 1 0 8 0 processpl 1232 580 0 521 7 1 6 6 0 8 0 procpl 664 827 0 761 7 0 7 7 0 8 1 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 752 566 0 535 10 0 10 10 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 264 0 0 17 0 17 17 0 8 0 bufpl 280 3048 0 116 210 0 210 210 0 8 0 anonpl 32 5096 0 0 42 0 42 42 0 246 0 amapchunkpl 152 14007 0 13502 46 3 43 43 0 158 22 amappl16 200 1898 0 1878 8 3 5 5 0 8 3 amappl15 192 92 0 92 1 1 0 1 0 8 0 amappl14 184 108 0 98 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1171 0 1135 2 0 2 2 0 8 0 amappl11 160 44 0 34 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 263 0 263 1 1 0 1 0 8 0 amappl8 136 17 0 16 1 0 1 1 0 8 0 amappl7 128 99 0 89 1 0 1 1 0 8 0 amappl6 120 169 0 166 1 0 1 1 0 8 0 amappl5 112 113 0 107 1 0 1 1 0 8 0 amappl4 104 270 0 254 1 0 1 1 0 8 0 amappl3 96 2121 0 2002 4 0 4 4 0 8 0 amappl2 88 619 0 566 2 0 2 2 0 8 0 amappl1 80 8832 0 8273 14 0 14 14 0 8 0 amappl 88 3557 0 3386 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 10 0 2 1 0 1 1 0 8 0 uaddrrnd 24 557 0 522 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 557 0 522 1 0 1 1 0 8 0 vmmpekpl 168 6219 0 6177 3 0 3 3 0 8 0 vmmpepl 168 41450 0 39446 95 0 95 95 0 357 0 vmsppl 488 556 0 522 7 1 6 6 0 8 1 rwobjpl 80 15646 0 12880 59 0 59 59 0 8 0 pdppl 4096 1122 0 1044 114 32 82 96 0 8 4 pvpl 32 11361 0 0 92 0 92 92 0 265 0 pmappl 256 556 0 522 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 291 0 36 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f8ff0) 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(ffffffff838d00e8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d00e8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002f3fde90,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: 0x700c62b308b0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff837f8ff0) 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(ffffffff838d00e8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d00e8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002f3fde90,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: 0x700c62b308b0, 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(ffffffff83367500) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838d5228,1,ffff80003a84b868) at pool_do_get+0x5df pool_get(ffffffff838d5228,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2e2fb0,ffff80003a84bac0,2,ffff80003a84ba10) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2e2fb0,ffff80003a84bac0,ffff80003a84ba10) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003a84bac0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a84bac0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x35951d4ef40, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83367500) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838d5228,1,ffff80003a84b868) at pool_do_get+0x5df pool_get(ffffffff838d5228,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2e2fb0,ffff80003a84bac0,2,ffff80003a84ba10) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2e2fb0,ffff80003a84bac0,ffff80003a84ba10) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003a84bac0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a84bac0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x35951d4ef40, count: -8