panic: pool_do_get: shmpl free list modified: page 0xfffffd805f99b000; item addr 0xfffffd805f99b9a0; offset 0x40=0x68867ef1 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 116883 64150 32767 0x10 0 0 syz-executor * 56375 69000 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833da8a8) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839521e0,1,ffff80003c477bf8) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839521e0,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c47f9d0,ffff80003c477e50,0,ffff80003c477da0) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c47f9d0,ffff80003c477e50,ffff80003c477da0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c477e50) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c477e50) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77c39935210, 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 0xfffffd805f99b000; item addr 0xfffffd805f99b9a0; offset 0x40=0x68867ef1 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833da8a8) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839521e0,1,ffff80003c477bf8) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839521e0,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c47f9d0,ffff80003c477e50,0,ffff80003c477da0) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c47f9d0,ffff80003c477e50,ffff80003c477da0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c477e50) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c477e50) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77c39935210, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c477a20 rbx 0xffff8000299deddf rdx 0xffff800001472900 rcx 0xffff80003c47f9d0 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x428df63a30294db4 r11 0x17c31a07aaced1eb r12 0xffff8000299debe0 r13 0 r14 0 r15 0x1 rip 0xffffffff8139bc55 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c477a10 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=56375 pid=69000 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=73, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c47e550,0xffff80003c47e040 process=0xffff80003c46a250 user=0xffff80003c472000, vmspace=0xfffffd806baa6028 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 26796 337507 1573 32767 2 0x10 syz-executor 26796 363551 1573 32767 3 0x4000090 fsleep syz-executor 26796 291842 1573 32767 3 0x4000090 kqread syz-executor 64150 116883 1165 32767 7 0x10 syz-executor 64150 197593 1165 32767 3 0x4000090 fifow syz-executor 56623 499231 27518 32767 2 0x10 syz-executor 56623 185055 27518 32767 3 0x4000090 fsleep syz-executor 56623 85940 27518 32767 3 0x4000090 fsleep syz-executor 69000 473679 65140 32767 2 0x10 syz-executor *69000 56375 65140 32767 7 0x4000010 syz-executor 69000 219212 65140 32767 3 0x4000090 fsleep syz-executor 18134 269929 56675 32767 2 0x10 syz-executor 18134 291363 56675 32767 3 0x4000090 fsleep syz-executor 31932 394368 6847 32767 2 0x10 syz-executor 31932 52904 6847 32767 3 0x4000090 fsleep syz-executor 31932 500327 6847 32767 3 0x4000090 fsleep syz-executor 3897 465234 0 0 3 0x14200 bored sosplice 58283 59859 31573 32767 3 0x90 nanoslp syz-executor 58283 323361 31573 32767 3 0x4000090 kqpoll syz-executor 58283 371869 31573 32767 3 0x4000090 fsleep syz-executor 1573 479631 98310 32767 3 0x90 nanoslp syz-executor 65140 366188 91468 32767 3 0x90 nanoslp syz-executor 31573 500388 52286 32767 3 0x90 nanoslp syz-executor 6847 298209 4055 32767 3 0x90 nanoslp syz-executor 7724 361540 75135 32767 3 0x10 biowait syz-executor 27518 301259 61776 32767 3 0x90 nanoslp syz-executor 1165 276336 56819 32767 3 0x90 nanoslp syz-executor 56675 149213 85939 32767 3 0x90 nanoslp syz-executor 91468 31253 85833 0 3 0x82 wait syz-executor 52286 284278 85833 0 3 0x82 wait syz-executor 4055 278034 85833 0 3 0x82 wait syz-executor 98310 155313 85833 0 3 0x82 wait syz-executor 75135 423914 85833 0 3 0x82 wait syz-executor 61776 282455 85833 0 3 0x82 wait syz-executor 56819 167754 85833 0 3 0x82 wait syz-executor 85939 408011 85833 0 3 0x82 wait syz-executor 85833 309348 35352 0 3 0x82 kqread syz-executor 35352 355878 79316 0 3 0x10008a sigsusp ksh 79316 17828 21804 0 3 0x98 kqread sshd-session 21804 395362 48376 0 3 0x92 kqread sshd-session 3564 16177 1 0 3 0x100083 ttyin getty 48376 191121 1 0 3 0x88 kqread sshd 22437 85506 12977 73 3 0x1100090 kqread syslogd 12977 242912 1 0 3 0x100082 sbwait syslogd 3275 222734 1 0 3 0x100080 kqread resolvd 28363 402475 79291 77 3 0x100092 kqread dhcpleased 86168 288685 79291 77 3 0x100092 kqread dhcpleased 79291 395169 1 0 3 0x80 kqread dhcpleased 23334 325004 0 0 3 0x14200 bored smr 85591 58963 0 0 2 0x14200 zerothread 86443 345816 0 0 3 0x14200 aiodoned aiodoned 66254 280170 0 0 3 0x14200 syncer update 3763 395862 0 0 3 0x14200 cleaner cleaner 84554 231183 0 0 3 0x14200 reaper reaper 89170 372904 0 0 3 0x14200 pgdaemon pagedaemon 13381 186825 0 0 3 0x14200 bored viomb 39221 182888 0 0 3 0x40014200 acpi0 acpi0 58029 491433 0 0 3 0x40014200 idle1 63307 437920 0 0 3 0x14200 bored softnet7 28391 375323 0 0 3 0x14200 bored softnet6 10415 113185 0 0 3 0x14200 bored softnet5 53577 287699 0 0 3 0x14200 bored softnet4 74233 373235 0 0 3 0x14200 bored softnet3 8838 407560 0 0 3 0x14200 bored softnet2 79070 322398 0 0 3 0x14200 bored softnet1 19191 421167 0 0 3 0x14200 bored softnet0 1756 206919 0 0 3 0x14200 bored systqmp 67733 162650 0 0 3 0x14200 bored systq 27863 12205 0 0 3 0x14200 tmoslp softclockmp 28764 30699 0 0 3 0x40014200 tmoslp softclock 56181 461665 0 0 3 0x40014200 idle0 1 307467 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 (0xffffffff839521f8) #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:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #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:748 #7 Xsyscall+0x128 Process 69000 (syz-executor) thread 0xffff80003c47f9d0 (56375) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839a0720) #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:748 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839521f8) #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:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #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:748 #7 Xsyscall+0x128 Process 7724 (syz-executor) thread 0xffff80002a2d4540 (361540) exclusive rrwlock inode r = 0 (0xfffffd806e52b5b0) #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+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa6 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+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3109 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ca80a08) #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+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3094 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10193 10956K 10968K 166960K 11271 0 pcb 17 12K 12K 166960K 17 0 rtable 205 5K 6K 166960K 256 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 7 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 31 0 iov 0 0K 1K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1354 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 121K 166960K 210 0 proc 61 115K 131K 166960K 485 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 9 0 in_multi 99 7K 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 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 342 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 245 151K 161K 166960K 3268 0 UVM aobj 5 2K 3K 166960K 7 0 pinsyscall 46 92K 108K 166960K 1207 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 6 0 NDP 11 0K 2K 166960K 27 0 temp 36 8671K 8736K 166960K 3898 0 kqueue 16 26K 31K 166960K 36 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 43 0 39 1 0 1 1 0 8 0 rtentry 176 95 0 1 5 0 5 5 0 8 0 unpcb 144 60 0 42 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 39 0 32 2 0 2 2 0 8 0 arp 128 10 0 0 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 1 1 0 1 1 0 8 0 inpcb 328 126 0 112 2 0 2 2 0 8 0 nd6 144 16 0 0 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 256 437 0 0 28 0 28 28 0 8 0 art_table 40 438 0 0 5 0 5 5 0 8 0 art_node 32 95 0 11 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 5 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 2 1 0 1 1 0 8 0 pool(0xffffffff839521e0:shmpl): page inconsistency: page 0xfffffd805f99b000; 32 on list, 2 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1638 0 130 95 0 95 95 0 8 0 ffsino 296 1638 0 130 117 0 117 117 0 8 0 nchpl 144 1915 0 233 63 0 63 63 0 8 0 uvmvnodes 80 1719 0 0 36 0 36 36 0 8 0 vnodes 216 1719 0 0 96 0 96 96 0 8 0 namei 1024 5671 0 5670 1 0 1 1 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 6751 0 6750 3 1 2 2 1 8 1 plimitpl 152 47 0 21 2 0 2 2 0 8 0 sigapl 424 486 0 426 8 0 8 8 0 8 0 knotepl 120 336 0 0 11 0 11 11 0 8 0 kqueuepl 224 40 0 25 1 0 1 1 0 8 0 pipepl 344 104 0 77 3 0 3 3 0 8 0 fdescpl 528 463 0 426 3 0 3 3 0 8 0 filepl 160 1610 0 1386 10 0 10 10 0 8 0 lockfpl 104 20 0 17 1 0 1 1 0 8 0 lockfspl 48 10 0 7 1 0 1 1 0 8 0 sessionpl 144 22 0 6 1 0 1 1 0 8 0 pgrppl 48 32 0 8 1 0 1 1 0 8 0 ucredpl 104 157 0 138 1 0 1 1 0 8 0 zombiepl 144 426 0 426 1 0 1 1 0 8 1 processpl 1248 486 0 426 7 1 6 6 0 8 0 procpl 656 609 0 537 7 0 7 7 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 752 229 0 193 5 0 5 5 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 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 131 0 0 17 0 17 17 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 185 0 0 12 0 12 12 0 8 0 bufpl 280 2900 0 112 200 0 200 200 0 8 0 anonpl 32 5383 0 0 44 0 44 44 0 246 0 amapchunkpl 152 8975 0 8429 31 3 28 28 0 158 4 amappl16 200 290 0 268 5 0 5 5 0 8 1 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 97 0 87 1 0 1 1 0 8 0 amappl13 176 4 0 3 1 0 1 1 0 8 0 amappl12 168 1051 0 1014 2 0 2 2 0 8 0 amappl11 160 41 0 31 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 20 0 19 1 0 1 1 0 8 0 amappl7 128 90 0 80 1 0 1 1 0 8 0 amappl6 120 160 0 157 1 0 1 1 0 8 0 amappl5 112 108 0 102 1 0 1 1 0 8 0 amappl4 104 249 0 234 1 0 1 1 0 8 0 amappl3 96 1642 0 1514 4 0 4 4 0 8 0 amappl2 88 590 0 537 2 0 2 2 0 8 0 amappl1 80 8120 0 7533 14 0 14 14 0 8 0 amappl 88 2645 0 2464 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 6 0 2 1 0 1 1 0 8 0 uaddrrnd 24 463 0 426 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 463 0 426 1 0 1 1 0 8 0 vmmpekpl 168 5278 0 5244 2 0 2 2 0 8 0 vmmpepl 168 33487 0 31379 100 0 100 100 0 357 3 vmsppl 488 462 0 426 7 1 6 6 0 8 1 rwobjpl 80 12483 0 9918 56 1 55 55 0 8 0 pdppl 4096 934 0 852 106 18 88 96 0 8 6 pvpl 32 12470 0 0 101 0 101 101 0 265 0 pmappl 256 462 0 426 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 279 0 21 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837ecff0) 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(ffffffff839a0518) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a0518) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff800030fff3d0,ffff800000079a80) 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: 0x777a5db88340, count: 9 ddb{0}> trace x86_ipi_db(ffffffff837ecff0) 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(ffffffff839a0518) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a0518) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff800030fff3d0,ffff800000079a80) 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: 0x777a5db88340, 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(ffffffff833da8a8) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839521e0,1,ffff80003c477bf8) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839521e0,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c47f9d0,ffff80003c477e50,0,ffff80003c477da0) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c47f9d0,ffff80003c477e50,ffff80003c477da0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c477e50) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c477e50) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77c39935210, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833da8a8) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839521e0,1,ffff80003c477bf8) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839521e0,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c47f9d0,ffff80003c477e50,0,ffff80003c477da0) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c47f9d0,ffff80003c477e50,ffff80003c477da0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c477e50) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c477e50) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77c39935210, count: -8