panic: pool_do_put: shmpl: double pool_put: 0xfffffd806c241380 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 41896 23626 32767 0x10 0 1 syz-executor *343336 16586 32767 0x10 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8306bbf5) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_put(ffffffff83611ce8,fffffd806c241380) at pool_do_put+0x1be sys/kern/subr_pool.c:841 pool_put(ffffffff83611ce8,fffffd806c241380) at pool_put+0xb3 sys/kern/subr_pool.c:799 shm_delete_mapping(fffffd806c04e370,ffff8000011b4008) at shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline] shm_delete_mapping(fffffd806c04e370,ffff8000011b4008) at shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174 syscall(ffff80002a10a3f0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a10a3f0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6b5a1e1bfe0, count: 8 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_put: shmpl: double pool_put: 0xfffffd806c241380 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8306bbf5) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_put(ffffffff83611ce8,fffffd806c241380) at pool_do_put+0x1be sys/kern/subr_pool.c:841 pool_put(ffffffff83611ce8,fffffd806c241380) at pool_put+0xb3 sys/kern/subr_pool.c:799 shm_delete_mapping(fffffd806c04e370,ffff8000011b4008) at shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline] shm_delete_mapping(fffffd806c04e370,ffff8000011b4008) at shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174 syscall(ffff80002a10a3f0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a10a3f0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6b5a1e1bfe0, count: -7 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a10a120 rbx 0xffffffff83450d87 cpu_info_full_primary+0x2d87 rdx 0 rcx 0xffff8000ffffc298 rax 0xffffffff8344fff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x9a38377fd6df5a7a r11 0x45e113c5f9f65efb r12 0xffffffff83450b88 cpu_info_full_primary+0x2b88 r13 0 r14 0 r15 0x1 rip 0xffffffff817bcfe5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a10a110 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=343336 pid=16586 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=51, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffcf40,0xffff8000ffffd460 process=0xffff800029fe8da0 user=0xffff80002a105000, vmspace=0xfffffd806c04e370 estcpu=1, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 23626 41896 13387 32767 7 0x10 syz-executor 23626 199937 13387 32767 3 0x4000090 fsleep syz-executor 95840 223790 44375 32767 2 0x10 syz-executor 95840 481313 44375 32767 3 0x4000090 fsleep syz-executor 16586 471514 32519 32767 2 0x10 syz-executor 16586 128250 32519 32767 3 0x4000090 fsleep syz-executor *16586 343336 32519 32767 7 0x4000010 syz-executor 31992 255010 80859 0 2 0x100002 sh 71509 406109 12460 32767 3 0x90 nanoslp syz-executor 71509 6903 12460 32767 3 0x4000090 fifor syz-executor 71509 168057 12460 32767 3 0x4000090 fsleep syz-executor 80859 220969 45588 0 3 0x80 wait syz-executor 19268 246386 45133 0 2 0x2 syz-executor 41876 172642 45133 0 2 0x2 syz-executor 45588 511935 45133 0 3 0x82 wait syz-executor 73585 484382 46183 32767 3 0x10 biowait syz-executor 12460 228689 37702 32767 3 0x90 nanoslp syz-executor 44375 235876 72297 32767 3 0x90 nanoslp syz-executor 13387 78882 30286 32767 3 0x90 nanoslp syz-executor 46183 279896 45133 0 3 0x82 wait syz-executor 37702 341588 45133 0 3 0x82 wait syz-executor 72297 367006 45133 0 3 0x82 wait syz-executor 30286 1863 45133 0 3 0x82 wait syz-executor 32519 198836 1181 32767 3 0x90 nanoslp syz-executor 1181 480391 45133 0 3 0x82 wait syz-executor 29819 345753 0 0 3 0x14200 bored sosplice 45133 213491 87630 0 2 0x2 syz-executor 87630 363516 27158 0 3 0x10008a sigsusp ksh 27158 318388 89190 0 3 0x98 kqread sshd-session 89190 334564 57439 0 3 0x92 kqread sshd-session 65235 320159 1 0 3 0x100083 ttyin getty 57439 361713 1 0 3 0x88 kqread sshd 49974 448971 21163 73 3 0x1100090 kqread syslogd 21163 434825 1 0 3 0x100082 sbwait syslogd 74303 337518 1 0 3 0x100080 kqread resolvd 60706 442791 52854 77 3 0x100092 kqread dhcpleased 47910 48861 52854 77 3 0x100092 kqread dhcpleased 52854 419760 1 0 3 0x80 kqread dhcpleased 98270 182572 0 0 3 0x14200 bored smr 68672 519435 0 0 2 0x14200 zerothread 90105 175985 0 0 3 0x14200 aiodoned aiodoned 97166 135248 0 0 3 0x14200 syncer update 13701 28068 0 0 3 0x14200 cleaner cleaner 67462 419139 0 0 3 0x14200 reaper reaper 65845 397639 0 0 3 0x14200 pgdaemon pagedaemon 59180 451521 0 0 3 0x14200 bored viomb 94583 521276 0 0 3 0x40014200 acpi0 acpi0 38602 231074 0 0 3 0x40014200 idle1 43931 372796 0 0 3 0x14200 bored softnet3 98325 329052 0 0 3 0x14200 bored softnet2 78732 243970 0 0 3 0x14200 bored softnet1 10358 23534 0 0 3 0x14200 bored softnet0 17617 342138 0 0 3 0x14200 bored systqmp 3247 54423 0 0 3 0x14200 bored systq 93704 27797 0 0 3 0x14200 tmoslp softclockmp 7451 431087 0 0 3 0x40014200 tmoslp softclock 54300 251629 0 0 3 0x40014200 idle0 1 44928 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 (0xffffffff83611cf8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_put+0x9f sys/kern/subr_pool.c:797 #4 shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline] #4 shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174 #5 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #5 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 Process 23626 (syz-executor) thread 0xffff80003599c048 (41896) exclusive rwlock amaplk r = 0 (0xfffffd805fda2ef8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 uvm_fault_check+0x521 sys/uvm/uvm_fault.c:782 #2 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #4 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806c04e2a8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 #2 uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 #3 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 Process 16586 (syz-executor) thread 0xffff8000ffffc298 (343336) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff834f2bd0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 __mp_acquire_count+0x58 #2 mi_switch+0x658 sys/kern/sched_bsd.c:460 #3 sleep_finish+0x219 sys/kern/kern_synch.c:416 #4 rw_enter+0x348 sys/kern/kern_rwlock.c:285 #5 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #6 uvm_unmap+0x81 sys/uvm/uvm_map.c:1792 #7 shm_delete_mapping+0xa0 sys/kern/sysv_shm.c:170 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83611cf8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_put+0x9f sys/kern/subr_pool.c:797 #4 shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline] #4 shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174 #5 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #5 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 Process 73585 (syz-executor) thread 0xffff8000ffff7968 (484382) exclusive rrwlock inode r = 0 (0xfffffd8056948c48) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x171 sys/ufs/ufs/ufs_ihash.c:95 #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:1852 #13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c552a38) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #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:1852 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10179 10082K 10100K 166960K 11395 0 pcb 17 12K 12K 166960K 17 0 rtable 148 4K 7K 166960K 1703 0 pf 25 16K 16K 166960K 119 0 ifaddr 27 4K 7K 166960K 217 0 ifgroup 38 1K 2K 166960K 224 0 sysctl 2 0K 0K 166960K 3 0 counters 58 35K 36K 166960K 150 0 ioctlops 0 0K 2K 166960K 79 0 iov 0 0K 18K 166960K 31 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1460 92K 92K 166960K 2177 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 84 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 21 77K 157K 166960K 1395 0 sigio 0 0K 0K 166960K 9 0 proc 56 78K 176K 166960K 1732 0 subproc 95 5K 12K 166960K 797 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 428 0 in_multi 55 4K 7K 166960K 570 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 2K 166960K 966 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 217 57K 130K 166960K 11617 0 UVM aobj 20 4K 4K 166960K 23 0 pinsyscall 42 84K 126K 166960K 3506 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 34 0 NDP 8 0K 2K 166960K 154 0 temp 62 6817K 6881K 166960K 11821 0 kqueue 13 20K 26K 166960K 105 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 120 279 0 276 3 2 1 3 0 8 0 rtentry 112 577 0 510 5 3 2 4 0 8 0 unpcb 144 1511 0 1494 14 10 4 6 0 8 3 syncache 336 18 0 18 6 5 1 1 0 8 1 tcpqe 32 11 0 11 3 2 1 1 0 8 1 tcpcb 808 586 0 578 22 15 7 9 0 8 6 arp 120 103 0 93 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 2 0 2 1 1 0 1 0 8 0 inpcb 336 1511 0 1502 29 22 7 12 0 8 6 nd6 136 153 0 140 1 0 1 1 0 8 0 kcovpl 48 60 0 54 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2353 0 2071 43 25 18 30 0 8 0 art_table 32 2354 0 2071 4 0 4 4 0 8 0 art_node 16 576 0 515 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 82 0 72 1 0 1 1 0 8 0 shmpl 112 20 0 3 1 0 1 1 0 8 0 pool(shmpl): free list modified: page 0xfffffd806c241000; item ordinal 0; addr 0xfffffd806c241380 (p 0xfffffd806c241000); offset 0x1c=0xdeafbeac dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 2545 0 917 103 0 103 103 0 8 1 ffsino 272 2545 0 917 109 0 109 109 0 8 0 nchpl 144 3501 0 1734 66 0 66 66 0 8 0 uvmvnodes 80 3351 0 0 69 0 69 69 0 8 0 vnodes 216 3351 0 0 187 0 187 187 0 8 0 namei 1024 16021 0 16021 8 7 1 2 0 8 1 percpumem 16 89 0 46 1 0 1 1 0 8 0 kstatmem 264 108 0 92 2 0 2 2 0 8 0 scxspl 216 30406 0 30405 14 13 1 8 1 8 0 plimitpl 152 286 0 264 2 0 2 2 0 8 0 sigapl 424 1567 0 1515 10 2 8 9 0 8 0 futexpl 64 8383 0 8379 4 3 1 1 0 8 0 knotepl 120 309 0 0 10 0 10 10 0 8 0 kqueuepl 216 244 0 235 5 4 1 3 0 8 0 pipepl 320 331 0 304 5 1 4 5 0 8 0 fdescpl 496 1548 0 1515 10 5 5 7 0 8 0 filepl 152 8331 0 8106 27 13 14 18 0 8 2 lockfpl 104 282 0 280 1 0 1 1 0 8 0 lockfspl 48 121 0 119 1 0 1 1 0 8 0 sessionpl 144 64 0 50 1 0 1 1 0 8 0 pgrppl 48 127 0 105 1 0 1 1 0 8 0 ucredpl 104 1125 0 1109 1 0 1 1 0 8 0 zombiepl 144 1515 0 1515 1 0 1 1 0 8 1 processpl 1160 1567 0 1515 7 2 5 6 0 8 0 procpl 648 2624 0 2566 10 4 6 7 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 664 3314 0 3285 53 39 14 20 0 8 10 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 225 0 0 27 0 27 27 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 366 0 0 20 0 20 20 0 8 0 bufpl 280 7405 0 945 462 0 462 462 0 8 0 anonpl 24 308851 0 305679 84 45 39 80 0 185 0 amapchunkpl 152 39791 0 39324 52 33 19 45 0 158 0 amappl16 200 7429 0 7421 47 46 1 14 0 8 0 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 192 0 182 1 0 1 1 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 2845 0 2812 5 3 2 3 0 8 0 amappl11 160 51 0 41 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 138 0 138 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 181 0 170 1 0 1 1 0 8 0 amappl6 120 586 0 584 1 0 1 1 0 8 0 amappl5 112 294 0 285 1 0 1 1 0 8 0 amappl4 104 415 0 399 1 0 1 1 0 8 0 amappl3 96 7107 0 6996 4 1 3 4 0 8 0 amappl2 88 1186 0 1129 2 0 2 2 0 8 0 amappl1 80 13777 0 13232 14 1 13 14 0 8 0 amappl 88 10929 0 10764 8 4 4 6 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 22 0 3 1 0 1 1 0 8 0 pool(aobjpl): free list modified: page 0xfffffd80715ab000; item ordinal 0; addr 0xfffffd80715ab1f8 (p 0xfffffd80715ab000); offset 0xc=0xdeaf4151 uaddrrnd 24 1548 0 1515 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1548 0 1515 1 0 1 1 0 8 0 vmmpekpl 168 14462 0 14408 5 1 4 5 0 8 0 vmmpepl 168 102369 0 100568 120 37 83 102 0 357 0 vmsppl 440 1547 0 1515 7 2 5 6 0 8 0 rwobjpl 56 36352 0 32150 63 2 61 61 0 8 0 pdppl 4096 3103 0 3030 256 179 77 113 0 8 4 pvpl 32 42657 0 0 347 3 344 344 0 265 0 pmappl 248 1547 0 1515 6 3 3 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 634 0 255 12 0 12 12 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:437 panic(ffffffff8306bbf5) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_put(ffffffff83611ce8,fffffd806c241380) at pool_do_put+0x1be sys/kern/subr_pool.c:841 pool_put(ffffffff83611ce8,fffffd806c241380) at pool_put+0xb3 sys/kern/subr_pool.c:799 shm_delete_mapping(fffffd806c04e370,ffff8000011b4008) at shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline] shm_delete_mapping(fffffd806c04e370,ffff8000011b4008) at shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174 syscall(ffff80002a10a3f0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a10a3f0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6b5a1e1bfe0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff834f29c8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834f29c8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 uvm_fault(fffffd806c04e1b8,b78c81a9000,0,1) at uvm_fault+0x1ed sys/uvm/uvm_fault.c:622 upageflttrap(ffff80002a08c360,b78c81a9000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002a08c360) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x75df3795a060, count: 7 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff834f29c8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834f29c8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 uvm_fault(fffffd806c04e1b8,b78c81a9000,0,1) at uvm_fault+0x1ed sys/uvm/uvm_fault.c:622 upageflttrap(ffff80002a08c360,b78c81a9000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002a08c360) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x75df3795a060, count: -8