panic: pool_do_get: shmpl free list modified: page 0xfffffd806bfe2000; item addr 0xfffffd806bfe21d0; offset 0x2c=0xdead410f Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 149419 52614 32767 0x10 0 0 syz-executor *193833 84796 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830645e7) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83553cf8,1,ffff80002a0f5b48) at pool_do_get+0x5e6 pool_get(ffffffff83553cf8,1) at pool_get+0x141 shmget_allocate_segment(ffff8000fffeb978,ffff80002a0f5da0,0,ffff80002a0f5cf0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000fffeb978,ffff80002a0f5da0,ffff80002a0f5cf0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff80002a0f5da0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0f5da0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbf4b752a300, 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 0xfffffd806bfe2000; item addr 0xfffffd806bfe21d0; offset 0x2c=0xdead410f ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830645e7) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83553cf8,1,ffff80002a0f5b48) at pool_do_get+0x5e6 pool_get(ffffffff83553cf8,1) at pool_get+0x141 shmget_allocate_segment(ffff8000fffeb978,ffff80002a0f5da0,0,ffff80002a0f5cf0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000fffeb978,ffff80002a0f5da0,ffff80002a0f5cf0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff80002a0f5da0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0f5da0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbf4b752a300, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a0f5990 rbx 0xffff800029b7cd87 rdx 0 rcx 0xffff8000fffeb978 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x91c13f3153f559e2 r11 0xac255f4e29a97886 r12 0xffff800029b7cb88 r13 0 r14 0 r15 0x1 rip 0xffffffff82044885 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a0f5980 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=193833 pid=84796 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffeaf58,0xffff8000ffff6f58 process=0xffff80002a0ed6b0 user=0xffff80002a0f0000, vmspace=0xfffffd805350d538 estcpu=36, cpticks=3, pctcpu=0.0, user=1, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52614 149419 7611 32767 7 0x10 syz-executor 19284 22139 94313 32767 2 0x10 syz-executor 19284 131784 94313 32767 3 0x4000090 fsleep syz-executor 19284 335420 94313 32767 3 0x4000090 fsleep syz-executor 53860 403865 12206 32767 2 0x10 syz-executor 53860 111677 12206 32767 3 0x4000090 fsleep syz-executor 53860 107076 12206 32767 3 0x4000090 fsleep syz-executor 84796 447926 91086 32767 2 0x10 syz-executor 84796 196213 91086 32767 2 0x4000010 syz-executor *84796 193833 91086 32767 7 0x4000010 syz-executor 78822 420807 23844 32767 2 0x10 syz-executor 78822 157123 23844 32767 3 0x4000090 fsleep syz-executor 78822 514608 23844 32767 3 0x4000090 fsleep syz-executor 78822 93885 23844 32767 3 0x4000090 fsleep syz-executor 69135 69163 67125 32767 2 0x10 syz-executor 69135 479081 67125 32767 3 0x4000090 fsleep syz-executor 25976 13162 31347 32767 2 0x10 syz-executor 25976 256325 31347 32767 3 0x4000090 fsleep syz-executor 25976 394896 31347 32767 3 0x4000090 fsleep syz-executor 25976 195533 31347 32767 3 0x4000090 fsleep syz-executor 94313 153055 448 32767 3 0x90 nanoslp syz-executor 448 523820 92103 0 3 0x82 wait syz-executor 31347 80683 12114 32767 3 0x90 nanoslp syz-executor 7611 492689 17207 32767 3 0x90 nanoslp syz-executor 91086 405458 66374 32767 3 0x90 nanoslp syz-executor 17207 204358 92103 0 3 0x82 wait syz-executor 12114 119698 92103 0 3 0x82 wait syz-executor 12206 105494 30506 32767 3 0x90 nanoslp syz-executor 60926 396472 58882 32767 2 0x10 syz-executor 23844 229785 99758 32767 3 0x90 nanoslp syz-executor 67125 88646 50049 32767 3 0x90 nanoslp syz-executor 58882 331788 92103 0 3 0x82 wait syz-executor 66374 449266 92103 0 3 0x82 wait syz-executor 30506 234985 92103 0 3 0x82 wait syz-executor 99758 211071 92103 0 3 0x82 wait syz-executor 50049 104841 92103 0 3 0x82 wait syz-executor 84185 344419 0 0 3 0x14200 bored sosplice 80273 418959 90371 0 3 0x100082 sbwait arp 90371 189693 26224 0 3 0x10008a sigsusp sh 26224 20346 1 0 3 0x80 wait syz-executor 92103 16011 70382 0 3 0x82 kqread syz-executor 70382 177404 24689 0 3 0x10008a sigsusp ksh 24689 494208 44630 0 3 0x98 kqread sshd-session 44630 516690 12035 0 3 0x92 kqread sshd-session 50820 503712 1 0 3 0x100083 ttyin getty 12035 515722 1 0 3 0x88 kqread sshd 46833 55253 80335 73 3 0x1100010 ffs_fsync syslogd 80335 291807 1 0 3 0x100082 sbwait syslogd 67184 509461 1 0 3 0x100080 kqread resolvd 45134 39459 45088 77 3 0x100092 kqread dhcpleased 94008 475968 45088 77 3 0x100092 kqread dhcpleased 45088 76610 1 0 3 0x80 kqread dhcpleased 865 21239 0 0 3 0x14200 bored smr 56126 223587 0 0 2 0x14200 zerothread 19845 464421 0 0 3 0x14200 aiodoned aiodoned 35639 174357 0 0 3 0x14200 syncer update 68606 440138 0 0 3 0x14200 cleaner cleaner 7733 357709 0 0 3 0x14200 reaper reaper 22635 12938 0 0 3 0x14200 pgdaemon pagedaemon 58750 461199 0 0 3 0x14200 bored viomb 92659 474049 0 0 3 0x40014200 acpi0 acpi0 65134 408586 0 0 3 0x40014200 idle1 49074 405183 0 0 3 0x14200 bored softnet3 5747 470171 0 0 3 0x14200 bored softnet2 39980 308257 0 0 3 0x14200 bored softnet1 65754 30438 0 0 3 0x14200 bored softnet0 45917 395554 0 0 3 0x14200 bored systqmp 13253 49712 0 0 3 0x14200 bored systq 85917 82060 0 0 3 0x14200 tmoslp softclockmp 45233 20820 0 0 3 0x40014200 tmoslp softclock 23137 129281 0 0 3 0x40014200 idle0 1 213013 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 (0xffffffff83553d08) #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_get+0x103 sys/kern/subr_pool.c:579 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 52614 (syz-executor) thread 0xffff8000ffffd450 (149419) shared rwlock vmmaplk r = 0 (0xfffffd805350dd08) #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 84796 (syz-executor) thread 0xffff8000fffeb978 (193833) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83545468) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #1 syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83553d08) #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_get+0x103 sys/kern/subr_pool.c:579 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 46833 (syslogd) thread 0xffff8000ffffd960 (55253) exclusive rrwlock inode r = 0 (0xfffffd806e355c50) #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 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2926 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10221 10028K 10035K 166960K 11640 0 pcb 17 14K 16K 166960K 19 0 rtable 236 6K 7K 166960K 3863 0 pf 31 16K 16K 166960K 259 0 ifaddr 42 8K 8K 166960K 497 0 ifgroup 50 2K 2K 166960K 504 0 sysctl 1 0K 0K 166960K 1 0 counters 64 36K 36K 166960K 290 0 ioctlops 0 0K 2K 166960K 162 0 iov 0 0K 16K 166960K 130 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1469 92K 92K 166960K 3576 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 25 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 40 0 dirhash 18 3K 3K 166960K 54 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 28 105K 181K 166960K 3380 0 sigio 0 0K 0K 166960K 47 0 proc 59 91K 176K 166960K 3747 0 subproc 117 7K 13K 166960K 2145 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 275 0 in_multi 99 7K 7K 166960K 1374 0 ether_multi 1 0K 0K 166960K 6 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 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 2073 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 280 83K 140K 166960K 24953 0 UVM aobj 90 6K 6K 166960K 97 0 pinsyscall 50 100K 141K 166960K 7341 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 138 0 NDP 11 0K 2K 166960K 362 0 temp 79 6824K 6890K 166960K 28606 0 kqueue 14 22K 32K 166960K 311 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 391 0 387 1 0 1 1 0 8 0 rtentry 112 1363 0 1252 5 1 4 4 0 8 0 unpcb 144 2195 0 2180 29 28 1 6 0 8 0 syncache 336 25 0 25 12 11 1 1 0 8 1 tcpqe 32 14 0 14 10 9 1 1 0 8 1 tcpcb 808 1183 0 1174 36 34 2 8 0 8 0 arp 120 244 0 226 1 0 1 1 0 8 0 ipq 40 11 0 9 1 0 1 1 0 8 0 ipqe 40 144 0 141 1 0 1 1 0 8 0 inpcb 336 3368 0 3355 61 59 2 18 0 8 0 nd6 136 382 0 357 1 0 1 1 0 8 0 kcovpl 48 165 0 156 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 5509 0 5052 77 48 29 30 0 8 0 art_table 32 5510 0 5052 4 0 4 4 0 8 0 art_node 16 1362 0 1261 1 0 1 1 0 8 0 sysvmsgpl 40 23 0 13 1 0 1 1 0 8 0 semapl 112 35 0 25 1 0 1 1 0 8 0 shmpl 112 94 0 7 3 0 3 3 0 8 0 pool(0xffffffff83553cf8:shmpl): page inconsistency: page 0xfffffd806bfe2000; 16 on list, 18 missing, 35 items per page dirhash 1024 46 0 24 3 0 3 3 0 8 0 dino2pl 256 3740 0 1926 114 0 114 114 0 8 0 ffsino 272 3740 0 1926 122 0 122 122 0 8 1 nchpl 144 5839 0 3935 71 0 71 71 0 8 0 uvmvnodes 80 5894 0 0 121 0 121 121 0 8 0 vnodes 216 5894 0 0 328 0 328 328 0 8 0 namei 1024 31483 0 31483 16 14 2 2 0 8 2 percpumem 16 159 0 113 1 0 1 1 0 8 0 kstatmem 264 248 0 226 2 0 2 2 0 8 0 scxspl 216 49373 0 49372 17 16 1 8 1 8 0 plimitpl 152 882 0 856 2 0 2 2 0 8 0 sigapl 424 3352 0 3293 13 5 8 9 0 8 0 futexpl 64 20654 0 20643 12 11 1 1 0 8 0 knotepl 120 530 0 0 10 0 10 10 0 8 0 kqueuepl 216 659 0 649 12 11 1 5 0 8 0 pipepl 320 918 0 888 19 14 5 9 0 8 0 fdescpl 496 3333 0 3293 12 5 7 8 0 8 0 filepl 152 17832 0 17565 46 32 14 21 0 8 1 lockfpl 104 378 0 373 1 0 1 1 0 8 0 lockfspl 48 127 0 123 1 0 1 1 0 8 0 sessionpl 144 148 0 131 1 0 1 1 0 8 0 pgrppl 48 331 0 306 1 0 1 1 0 8 0 ucredpl 104 2415 0 2396 1 0 1 1 0 8 0 zombiepl 144 3293 0 3293 1 0 1 1 0 8 1 processpl 1160 3352 0 3293 7 1 6 6 0 8 0 procpl 648 5693 0 5621 7 0 7 7 0 8 0 srpgc 96 4 0 4 2 2 0 1 0 8 0 sosppl 168 26 0 26 8 7 1 1 0 8 1 sockpl 664 5980 0 5948 91 87 4 19 0 8 0 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 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 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 294 0 0 33 3 30 33 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 650 0 0 28 0 28 28 0 8 0 bufpl 280 9518 0 2478 503 0 503 503 0 8 0 anonpl 24 584238 0 578572 128 53 75 91 0 185 26 amapchunkpl 152 80433 0 79754 66 26 40 46 0 158 11 amappl16 200 12936 0 12870 122 116 6 28 0 8 1 amappl15 192 11 0 11 2 2 0 1 0 8 0 amappl14 184 357 0 346 1 0 1 1 0 8 0 amappl13 176 22 0 22 1 1 0 1 0 8 0 amappl12 168 5766 0 5724 3 0 3 3 0 8 0 amappl11 160 55 0 45 1 0 1 1 0 8 0 amappl10 152 66 0 66 1 1 0 1 0 8 0 amappl9 144 147 0 147 1 1 0 1 0 8 0 amappl8 136 39 0 37 1 0 1 1 0 8 0 amappl7 128 332 0 321 1 0 1 1 0 8 0 amappl6 120 1285 0 1282 1 0 1 1 0 8 0 amappl5 112 595 0 586 1 0 1 1 0 8 0 amappl4 104 677 0 661 1 0 1 1 0 8 0 amappl3 96 14875 0 14738 5 1 4 5 0 8 0 amappl2 88 2386 0 2319 2 0 2 2 0 8 0 amappl1 80 27247 0 26689 18 4 14 15 0 8 0 amappl 88 23601 0 23381 6 0 6 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 96 0 7 2 0 2 2 0 8 0 uaddrrnd 24 3333 0 3293 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3333 0 3293 1 0 1 1 0 8 0 vmmpekpl 168 31738 0 31658 5 1 4 5 0 8 0 vmmpepl 168 219044 0 216885 169 62 107 118 0 357 8 vmsppl 440 3332 0 3293 9 3 6 7 0 8 0 rwobjpl 56 70785 0 63838 110 10 100 100 0 8 0 pdppl 4096 6673 0 6586 484 391 93 125 0 8 6 pvpl 32 46711 0 0 375 2 373 373 0 265 0 pmappl 248 3332 0 3293 5 1 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 995 0 562 14 0 14 14 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834e4ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:164 intr_handler(ffff80002a0d2b90,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83545260) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83545260) at __mp_lock+0x192 sys/kern/kern_lock.c:144 sys_mmap(ffff8000ffffd450,ffff80002a0d2eb0,ffff80002a0d2e00) at sys_mmap+0x62f sys/uvm/uvm_mmap.c:287 syscall(ffff80002a0d2eb0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0d2eb0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dfe57776760, count: 5 ddb{0}> trace x86_ipi_db(ffffffff834e4ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:164 intr_handler(ffff80002a0d2b90,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83545260) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83545260) at __mp_lock+0x192 sys/kern/kern_lock.c:144 sys_mmap(ffff8000ffffd450,ffff80002a0d2eb0,ffff80002a0d2e00) at sys_mmap+0x62f sys/uvm/uvm_mmap.c:287 syscall(ffff80002a0d2eb0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0d2eb0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dfe57776760, count: -10 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:437 panic(ffffffff830645e7) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83553cf8,1,ffff80002a0f5b48) at pool_do_get+0x5e6 pool_get(ffffffff83553cf8,1) at pool_get+0x141 shmget_allocate_segment(ffff8000fffeb978,ffff80002a0f5da0,0,ffff80002a0f5cf0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000fffeb978,ffff80002a0f5da0,ffff80002a0f5cf0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff80002a0f5da0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0f5da0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbf4b752a300, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830645e7) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83553cf8,1,ffff80002a0f5b48) at pool_do_get+0x5e6 pool_get(ffffffff83553cf8,1) at pool_get+0x141 shmget_allocate_segment(ffff8000fffeb978,ffff80002a0f5da0,0,ffff80002a0f5cf0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000fffeb978,ffff80002a0f5da0,ffff80002a0f5cf0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff80002a0f5da0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0f5da0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbf4b752a300, count: -8