panic: pool_do_get: shmpl free list modified: page 0xfffffd800d70f000; item addr 0xfffffd800d70fc40; offset 0x40=0x67b268b8 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *509350 63711 32767 0x10 0x4000000 0K syz-executor 248458 95818 32767 0x10 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833ab8c1) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839b78b8,1,ffff80003c50ec88) at pool_do_get+0x5da pool_get(ffffffff839b78b8,1) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff4cf8,ffff80003c50eee0,0,ffff80003c50ee30) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff4cf8,ffff80003c50eee0,ffff80003c50ee30) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c50eee0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c50eee0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf9eeced45a0, 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 0xfffffd800d70f000; item addr 0xfffffd800d70fc40; offset 0x40=0x67b268b8 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833ab8c1) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839b78b8,1,ffff80003c50ec88) at pool_do_get+0x5da pool_get(ffffffff839b78b8,1) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff4cf8,ffff80003c50eee0,0,ffff80003c50ee30) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff4cf8,ffff80003c50eee0,ffff80003c50ee30) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c50eee0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c50eee0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf9eeced45a0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c50eac0 rbx 0xffffffff8383fdc7 cpu_info_full_primary+0x2dc7 rdx 0 rcx 0xffff8000ffff4cf8 rax 0xffffffff8383eff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf513744cbca63c4e r11 0x7d509515da3e0bf5 r12 0xffffffff8383fbc8 cpu_info_full_primary+0x2bc8 r13 0 r14 0 r15 0x1 rip 0xffffffff82936ee5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c50eab0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=509350 pid=63711 tcnt=5 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=0xffff8000ffff54a8,0xffff8000ffff4a78 process=0xffff80003c501010 user=0xffff80003c509000, vmspace=0xfffffd807de221f0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63711 417101 56111 32767 2 0x10 syz-executor 63711 494224 56111 32767 3 0x4000090 fsleep syz-executor 63711 337448 56111 32767 3 0x4000090 fsleep syz-executor *63711 509350 56111 32767 7 0x4000010 syz-executor 63711 397150 56111 32767 2 0x4000010 syz-executor 90946 164632 28697 32767 3 0x90 nanoslp syz-executor 90946 410013 28697 32767 3 0x4000090 semwait syz-executor 66549 464717 2024 32767 3 0x90 nanoslp syz-executor 66549 17619 2024 32767 3 0x4000090 kqread syz-executor 66549 230436 2024 32767 3 0x4000090 fsleep syz-executor 22104 295688 0 0 3 0x14200 bored sosplice 6780 470188 99306 0 3 0x100082 sbwait ndp 99306 285062 25041 0 3 0x10008a sigsusp sh 25041 464294 69547 0 3 0x80 wait syz-executor 95818 248458 14274 32767 7 0x10 syz-executor 9927 225032 92696 32767 2 0x10 syz-executor 56111 38424 27706 32767 3 0x90 nanoslp syz-executor 88041 232049 30405 32767 3 0x10 biowait syz-executor 28697 329862 58639 32767 3 0x90 nanoslp syz-executor 2024 284539 19084 32767 3 0x90 nanoslp syz-executor 89663 141579 29718 32767 3 0x90 nanoslp syz-executor 69547 97517 28410 0 3 0x82 wait syz-executor 14274 128330 28410 0 3 0x82 wait syz-executor 92696 357487 28410 0 3 0x82 wait syz-executor 27706 121989 28410 0 3 0x82 wait syz-executor 30405 115390 28410 0 3 0x82 wait syz-executor 58639 128638 28410 0 3 0x82 wait syz-executor 19084 121796 28410 0 3 0x82 wait syz-executor 29718 393781 28410 0 3 0x82 wait syz-executor 28410 366036 94715 0 3 0x82 kqread syz-executor 94715 437507 26511 0 3 0x10008a sigsusp ksh 26511 260515 81747 0 3 0x98 kqread sshd-session 81747 420758 15809 0 3 0x92 kqread sshd-session 98605 381 1 0 3 0x100083 ttyin getty 15809 367356 1 0 3 0x88 kqread sshd 91155 353123 23887 73 3 0x1100090 kqread syslogd 23887 459359 1 0 3 0x100082 sbwait syslogd 17031 194681 1 0 3 0x100080 kqread resolvd 64936 375683 73378 77 3 0x100092 kqread dhcpleased 14434 54575 73378 77 3 0x100092 kqread dhcpleased 73378 76883 1 0 3 0x80 kqread dhcpleased 81984 38640 0 0 3 0x14200 bored smr 88379 31737 0 0 3 0x14200 pgzero zerothread 43271 36960 0 0 3 0x14200 aiodoned aiodoned 25947 510391 0 0 3 0x14200 syncer update 28813 69513 0 0 3 0x14200 cleaner cleaner 33863 486010 0 0 3 0x14200 reaper reaper 13322 522976 0 0 3 0x14200 pgdaemon pagedaemon 72047 413252 0 0 3 0x14200 bored viomb 97939 191729 0 0 3 0x40014200 acpi0 acpi0 85407 358106 0 0 3 0x40014200 idle1 22331 507623 0 0 3 0x14200 bored softnet3 97847 114263 0 0 3 0x14200 bored softnet2 27162 358252 0 0 3 0x14200 bored softnet1 11440 473917 0 0 3 0x14200 bored softnet0 29307 127024 0 0 3 0x14200 bored systqmp 45152 140302 0 0 3 0x14200 bored systq 87647 122852 0 0 3 0x14200 tmoslp softclockmp 41200 273620 0 0 3 0x40014200 tmoslp softclock 14201 277333 0 0 3 0x40014200 idle0 1 392473 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 (0xffffffff839b78d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x10b sys/kern/subr_pool.c:583 #4 shmget_allocate_segment+0x1a7 #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:577 #7 Xsyscall+0x128 Process 63711 (syz-executor) thread 0xffff8000ffff4cf8 (509350) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838ddd88) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839b78d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x10b sys/kern/subr_pool.c:583 #4 shmget_allocate_segment+0x1a7 #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:577 #7 Xsyscall+0x128 Process 95818 (syz-executor) thread 0xffff8000ffff6540 (248458) exclusive rrwlock inode r = 0 (0xfffffd806bc2b888) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #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:1860 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c407bc8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #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:1860 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 88041 (syz-executor) thread 0xffff8000ffff9728 (232049) exclusive rrwlock inode r = 0 (0xfffffd806bc2b770) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #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:3111 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c6d6418) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #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:3096 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10191 10954K 10966K 166960K 11270 0 pcb 17 12K 12K 166960K 17 0 rtable 234 6K 6K 166960K 345 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 1K 166960K 1 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 12K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1332 84K 84K 166960K 1357 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 12 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 24 89K 121K 166960K 264 0 sigio 0 0K 0K 166960K 5 0 proc 58 79K 103K 166960K 492 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 43 0 in_multi 99 7K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 1 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 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 354 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 225 73K 94K 166960K 3681 0 UVM aobj 9 3K 4K 166960K 11 0 pinsyscall 46 92K 112K 166960K 1259 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 11 0K 2K 166960K 27 0 temp 40 8635K 8699K 166960K 4112 0 kqueue 15 24K 30K 166960K 49 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 41 0 37 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 144 199 0 183 4 0 4 4 0 8 3 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 808 82 0 77 4 0 4 4 0 8 3 arp 120 18 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 1 1 0 1 1 0 8 0 inpcb 376 272 0 263 8 0 8 8 0 8 6 nd6 136 24 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 256 453 0 0 29 0 29 29 0 8 0 art_table 32 454 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 1 0 0 1 0 1 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 8 0 2 1 0 1 1 0 8 0 pool(0xffffffff839b78b8:shmpl): page inconsistency: page 0xfffffd800d70f000; 28 on list, 6 missing, 35 items per page dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1710 0 210 94 0 94 94 0 8 0 ffsino 280 1710 0 210 108 0 108 108 0 8 0 nchpl 144 2060 0 390 63 0 63 63 0 8 0 uvmvnodes 80 1791 0 0 37 0 37 37 0 8 0 vnodes 216 1791 0 0 100 0 100 100 0 8 0 namei 1024 6339 0 6338 1 0 1 1 0 8 0 percpumem 16 46 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 7136 0 7135 9 1 8 8 1 8 7 plimitpl 152 57 0 32 2 0 2 2 0 8 1 sigapl 424 536 0 481 7 0 7 7 0 8 0 futexpl 64 1786 0 1783 1 0 1 1 0 8 0 knotepl 120 68 0 0 3 0 3 3 0 8 0 kqueuepl 216 66 0 54 2 0 2 2 0 8 1 pipepl 328 118 0 91 3 0 3 3 0 8 0 fdescpl 504 517 0 481 7 1 6 6 0 8 0 filepl 152 2236 0 2020 15 0 15 15 0 8 6 lockfpl 104 55 0 52 1 0 1 1 0 8 0 lockfspl 48 23 0 20 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 31 0 7 1 0 1 1 0 8 0 ucredpl 104 261 0 243 1 0 1 1 0 8 0 zombiepl 144 482 0 481 1 0 1 1 0 8 0 processpl 1168 536 0 481 5 0 5 5 0 8 0 procpl 656 740 0 678 7 0 7 7 0 8 1 sockpl 688 517 0 488 15 4 11 15 0 8 7 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 253 0 0 16 0 16 16 0 8 0 bufpl 280 2647 0 124 181 0 181 181 0 8 0 anonpl 24 114994 0 111562 46 0 46 46 0 184 20 amapchunkpl 152 12364 0 11874 36 0 36 36 0 158 12 amappl16 200 2465 0 2430 14 4 10 14 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 98 0 86 1 0 1 1 0 8 0 amappl13 176 11 0 10 1 0 1 1 0 8 0 amappl12 168 1116 0 1080 2 0 2 2 0 8 0 amappl11 160 50 0 40 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 25 0 24 1 0 1 1 0 8 0 amappl7 128 95 0 84 1 0 1 1 0 8 0 amappl6 120 164 0 160 1 0 1 1 0 8 0 amappl5 112 108 0 102 1 0 1 1 0 8 0 amappl4 104 268 0 253 1 0 1 1 0 8 0 amappl3 96 2003 0 1887 4 0 4 4 0 8 0 amappl2 88 595 0 538 2 0 2 2 0 8 0 amappl1 80 7688 0 7119 14 0 14 14 0 8 0 amappl 88 3342 0 3169 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 24 517 0 481 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 517 0 481 1 0 1 1 0 8 0 vmmpekpl 168 5610 0 5578 2 0 2 2 0 8 0 vmmpepl 168 37575 0 35641 101 0 101 101 0 357 9 vmsppl 456 516 0 481 7 1 6 6 0 8 0 rwobjpl 64 15430 0 12747 46 0 46 46 0 8 1 pdppl 4096 1041 0 962 105 20 85 95 0 8 6 pvpl 32 14742 0 0 120 1 119 120 0 265 0 pmappl 248 516 0 481 4 1 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 289 0 23 8 0 8 8 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(ffffffff833ab8c1) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839b78b8,1,ffff80003c50ec88) at pool_do_get+0x5da pool_get(ffffffff839b78b8,1) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff4cf8,ffff80003c50eee0,0,ffff80003c50ee30) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff4cf8,ffff80003c50eee0,ffff80003c50ee30) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c50eee0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c50eee0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf9eeced45a0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029aabff0) 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(ffffffff838ddb80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838ddb80) at __mp_lock+0x192 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff838ddb80,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x24f sys/kern/kern_synch.c:414 getblk(fffffd8009b1d870,1953a0,4000,0,ffffffffffffffff) at getblk+0x197 sys/kern/vfs_bio.c:1017 bread(fffffd8009b1d870,1953a0,4000,ffff80003a8e5c78) at bread+0x47 bio_doread sys/kern/vfs_bio.c:422 [inline] bread(fffffd8009b1d870,1953a0,4000,ffff80003a8e5c78) at bread+0x47 sys/kern/vfs_bio.c:467 ffs_update(fffffd806bc2b7e8,1) at ffs_update+0x198 sys/ufs/ffs/ffs_inode.c:91 ffs_truncate(fffffd806bc2b7e8,0,4,fffffd807f7d3750) at ffs_truncate+0xcb6 ufs_rmdir(ffff80003a8e5f58) at ufs_rmdir+0x377 sys/ufs/ufs/ufs_vnops.c:1265 VOP_RMDIR(fffffd806c44a7d0,fffffd800d75a2c8,ffff80003a8e6038) at VOP_RMDIR+0x19a sys/kern/vfs_vops.c:413 dounlinkat(ffff8000ffff6540,ffffff9c,702ecd2588a0,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1893 end trace frame: 0xffff80003a8e61a0, count: 0 ddb{1}> trace x86_ipi_db(ffff800029aabff0) 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(ffffffff838ddb80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838ddb80) at __mp_lock+0x192 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff838ddb80,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x24f sys/kern/kern_synch.c:414 getblk(fffffd8009b1d870,1953a0,4000,0,ffffffffffffffff) at getblk+0x197 sys/kern/vfs_bio.c:1017 bread(fffffd8009b1d870,1953a0,4000,ffff80003a8e5c78) at bread+0x47 bio_doread sys/kern/vfs_bio.c:422 [inline] bread(fffffd8009b1d870,1953a0,4000,ffff80003a8e5c78) at bread+0x47 sys/kern/vfs_bio.c:467 ffs_update(fffffd806bc2b7e8,1) at ffs_update+0x198 sys/ufs/ffs/ffs_inode.c:91 ffs_truncate(fffffd806bc2b7e8,0,4,fffffd807f7d3750) at ffs_truncate+0xcb6 ufs_rmdir(ffff80003a8e5f58) at ufs_rmdir+0x377 sys/ufs/ufs/ufs_vnops.c:1265 VOP_RMDIR(fffffd806c44a7d0,fffffd800d75a2c8,ffff80003a8e6038) at VOP_RMDIR+0x19a sys/kern/vfs_vops.c:413 dounlinkat(ffff8000ffff6540,ffffff9c,702ecd2588a0,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1893 syscall(ffff80003a8e61b0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a8e61b0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x702ecd258890, count: -16