panic: pool_do_get: shmpl free list modified: page 0xfffffd8060aba000; item addr 0xfffffd8060abae00; offset 0x40=0x687b00c4 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *115578 12552 32767 0x10 0x4000000 0K syz-executor 53435 18826 32767 0x10 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d48b3) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838d3fb8,1,ffff800038bf6b88) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff838d3fb8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c01f4b0,ffff800038bf6de0,113,ffff800038bf6d30) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c01f4b0,ffff800038bf6de0,ffff800038bf6d30) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff800038bf6de0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800038bf6de0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x81a7ec53b20, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: pool_do_get: shmpl free list modified: page 0xfffffd8060aba000; item addr 0xfffffd8060abae00; offset 0x40=0x687b00c4 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d48b3) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838d3fb8,1,ffff800038bf6b88) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff838d3fb8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c01f4b0,ffff800038bf6de0,113,ffff800038bf6d30) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c01f4b0,ffff800038bf6de0,ffff800038bf6d30) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff800038bf6de0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800038bf6de0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x81a7ec53b20, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800038bf69c0 rbx 0xffffffff8387edd7 cpu_info_full_primary+0x2dd7 rdx 0xffff800001465280 rcx 0xffff80003c01f4b0 rax 0xffffffff8387dff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xba0a5a450812c425 r11 0x312a4f321db78274 r12 0xffffffff8387ebd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff81717bb5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800038bf69b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=115578 pid=12552 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c01fc60,0xffff80003c01e560 process=0xffff80003a413090 user=0xffff800038bf1000, vmspace=0xfffffd806ba53990 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25319 420156 8638 32767 2 0x10 syz-executor 12552 98318 93485 32767 2 0x10 syz-executor *12552 115578 93485 32767 7 0x4000010 syz-executor 41472 473525 97711 32767 3 0x90 nanoslp syz-executor 41472 119870 97711 32767 3 0x4000090 fifow syz-executor 41472 130859 97711 32767 3 0x4000090 fsleep syz-executor 18826 53435 70408 32767 7 0x10 syz-executor 18826 331244 70408 32767 3 0x4000090 fsleep syz-executor 18826 308693 70408 32767 3 0x4000090 kqpoll syz-executor 18826 187902 70408 32767 3 0x4000090 fsleep syz-executor 3429 309946 4692 32767 3 0x90 nanoslp syz-executor 3429 464115 4692 32767 3 0x4000090 fifor syz-executor 3429 135387 4692 32767 3 0x4000090 fifor syz-executor 3429 444301 4692 32767 3 0x4000090 fsleep syz-executor 64937 498612 0 0 3 0x14200 bored sosplice 2888 460626 60610 32767 3 0x90 nanoslp syz-executor 2888 395545 60610 32767 3 0x4000090 semwait syz-executor 2888 294674 60610 32767 3 0x4000090 fsleep syz-executor 2888 468724 60610 32767 3 0x4000090 fsleep syz-executor 97711 509397 59298 32767 3 0x90 nanoslp syz-executor 93485 309920 30493 32767 3 0x90 nanoslp syz-executor 21430 310218 24816 32767 3 0x10 biowait syz-executor 79986 267743 26003 32767 3 0x10 biowait syz-executor 4692 387026 3213 32767 3 0x90 nanoslp syz-executor 60610 382986 40347 32767 3 0x90 nanoslp syz-executor 70408 432713 37013 32767 3 0x90 nanoslp syz-executor 8638 167663 2143 32767 3 0x90 nanoslp syz-executor 59298 43678 25717 0 3 0x82 wait syz-executor 40347 25560 25717 0 3 0x82 wait syz-executor 30493 213173 25717 0 3 0x82 wait syz-executor 37013 441789 25717 0 3 0x82 wait syz-executor 3213 228130 25717 0 3 0x82 wait syz-executor 2143 401362 25717 0 3 0x82 wait syz-executor 26003 342983 25717 0 3 0x82 wait syz-executor 24816 308824 25717 0 3 0x82 wait syz-executor 25717 61677 53668 0 3 0x82 kqread syz-executor 53668 367243 80580 0 3 0x10008a sigsusp ksh 80580 4941 14768 0 3 0x98 kqread sshd-session 14768 426182 4432 0 3 0x92 kqread sshd-session 56909 41561 1 0 3 0x100083 ttyin getty 4432 65694 1 0 3 0x88 kqread sshd 14564 383034 98083 73 3 0x1100090 kqread syslogd 98083 438187 1 0 3 0x100082 sbwait syslogd 91384 370541 1 0 3 0x100080 kqread resolvd 51742 347930 42653 77 3 0x100092 kqread dhcpleased 81234 153798 42653 77 3 0x100092 kqread dhcpleased 42653 212176 1 0 3 0x80 kqread dhcpleased 47953 500796 0 0 3 0x14200 bored smr 52701 477346 0 0 3 0x14200 pgzero zerothread 27132 311836 0 0 3 0x14200 aiodoned aiodoned 38332 117019 0 0 3 0x14200 syncer update 79056 344148 0 0 3 0x14200 cleaner cleaner 35882 414356 0 0 3 0x14200 reaper reaper 37719 480965 0 0 3 0x14200 pgdaemon pagedaemon 64719 423854 0 0 3 0x14200 bored viomb 3931 99745 0 0 3 0x40014200 acpi0 acpi0 40807 112564 0 0 3 0x40014200 idle1 65230 618 0 0 3 0x14200 bored softnet3 25121 453818 0 0 3 0x14200 bored softnet2 53544 413641 0 0 3 0x14200 bored softnet1 26008 146613 0 0 3 0x14200 bored softnet0 54715 163585 0 0 3 0x14200 bored systqmp 16017 88385 0 0 3 0x14200 bored systq 38930 89455 0 0 3 0x14200 tmoslp softclockmp 72309 362145 0 0 3 0x40014200 tmoslp softclock 70097 211218 0 0 3 0x40014200 idle0 1 205727 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex shmpl r = 0 (0xffffffff838d3fd0) #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 12552 (syz-executor) thread 0xffff80003c01f4b0 (115578) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839100a8) #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 (0xffffffff838d3fd0) #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 21430 (syz-executor) thread 0xffff80002a2979b8 (310218) exclusive rrwlock inode r = 0 (0xfffffd806ba20e60) #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 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 (0xfffffd806d465d30) #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 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 Process 79986 (syz-executor) thread 0xffff80002a297498 (267743) exclusive rrwlock inode r = 0 (0xfffffd806ba20680) #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 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 (0xfffffd806d465430) #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 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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10188 10955K 10967K 166960K 11266 0 pcb 17 12K 12K 166960K 17 0 rtable 207 5K 6K 166960K 254 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 32 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1353 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 4 9K 9K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 24 89K 121K 166960K 168 0 sigio 0 0K 0K 166960K 2 0 proc 58 79K 115K 166960K 479 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 1 0K 0K 166960K 12 0 in_multi 99 7K 7K 166960K 99 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 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 340 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 256 184K 195K 166960K 2934 0 UVM aobj 6 2K 2K 166960K 7 0 pinsyscall 45 90K 112K 166960K 1160 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 19 1K 2K 166960K 27 0 temp 36 8670K 8734K 166960K 3709 0 kqueue 15 24K 24K 166960K 25 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 38 0 34 1 0 1 1 0 8 0 rtentry 176 96 0 1 5 0 5 5 0 8 0 unpcb 144 51 0 29 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 16 0 11 1 0 1 1 0 8 0 arp 128 10 0 0 1 0 1 1 0 8 0 inpcb 328 84 0 71 2 0 2 2 0 8 0 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 144 17 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 256 439 0 0 28 0 28 28 0 8 0 art_table 40 440 0 0 5 0 5 5 0 8 0 art_node 32 96 0 11 1 0 1 1 0 8 0 semapl 112 3 0 1 1 0 1 1 0 8 0 shmpl 112 4 0 1 1 0 1 1 0 8 0 pool(0xffffffff838d3fb8:shmpl): page inconsistency: page 0xfffffd8060aba000; 31 on list, 3 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1577 0 71 95 0 95 95 0 8 0 ffsino 288 1577 0 71 108 0 108 108 0 8 0 nchpl 144 1801 0 124 63 0 63 63 0 8 0 uvmvnodes 80 1658 0 0 34 0 34 34 0 8 0 vnodes 216 1658 0 0 93 0 93 93 0 8 0 namei 1024 5274 0 5272 2 0 2 2 0 8 1 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 6419 0 6417 3 1 2 2 1 8 1 plimitpl 152 36 0 12 1 0 1 1 0 8 0 sigapl 424 439 0 384 7 0 7 7 0 8 0 knotepl 120 283 0 0 9 0 9 9 0 8 0 kqueuepl 224 26 0 12 1 0 1 1 0 8 0 pipepl 336 100 0 73 3 0 3 3 0 8 0 fdescpl 520 420 0 384 3 0 3 3 0 8 0 filepl 160 1480 0 1259 10 0 10 10 0 8 0 lockfpl 104 8 0 6 1 0 1 1 0 8 0 lockfspl 48 5 0 3 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 29 0 5 1 0 1 1 0 8 0 ucredpl 104 121 0 102 1 0 1 1 0 8 0 zombiepl 144 384 0 384 1 0 1 1 0 8 1 processpl 1240 439 0 384 5 0 5 5 0 8 0 procpl 656 493 0 426 7 0 7 7 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 728 174 0 134 5 0 5 5 0 8 1 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 202 0 0 13 0 13 13 0 8 0 bufpl 280 2833 0 112 195 0 195 195 0 8 0 anonpl 32 6030 0 0 49 0 49 49 0 246 0 amapchunkpl 152 8749 0 8204 32 4 28 28 0 158 4 amappl16 200 2089 0 2007 5 0 5 5 0 8 0 amappl15 192 48 0 48 1 1 0 1 0 8 0 amappl14 184 97 0 87 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 1013 0 978 2 0 2 2 0 8 0 amappl11 160 45 0 35 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 0 1 1 0 8 1 amappl8 136 38 0 37 1 0 1 1 0 8 0 amappl7 128 97 0 87 1 0 1 1 0 8 0 amappl6 120 171 0 168 1 0 1 1 0 8 0 amappl5 112 114 0 108 1 0 1 1 0 8 0 amappl4 104 257 0 240 1 0 1 1 0 8 0 amappl3 96 1340 0 1217 4 0 4 4 0 8 0 amappl2 88 670 0 614 2 0 2 2 0 8 0 amappl1 80 7912 0 7357 14 0 14 14 0 8 1 amappl 88 2315 0 2128 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 1 1 0 1 1 0 8 0 uaddrrnd 24 420 0 384 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 420 0 384 1 0 1 1 0 8 0 vmmpekpl 168 4790 0 4754 2 0 2 2 0 8 0 vmmpepl 168 33450 0 31336 98 0 98 98 0 357 0 vmsppl 480 419 0 384 7 1 6 6 0 8 0 rwobjpl 72 13813 0 11257 48 1 47 48 0 8 0 pdppl 4096 847 0 768 107 12 95 95 0 8 16 pvpl 32 13582 0 0 111 1 110 110 0 265 0 pmappl 256 419 0 384 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 388 0 15 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d48b3) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838d3fb8,1,ffff800038bf6b88) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff838d3fb8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c01f4b0,ffff800038bf6de0,113,ffff800038bf6d30) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c01f4b0,ffff800038bf6de0,ffff800038bf6d30) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff800038bf6de0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800038bf6de0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x81a7ec53b20, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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 end of kernel end trace frame: 0x7097756f9960, count: 12 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 end of kernel end trace frame: 0x7097756f9960, count: -3