panic: pool_do_get: shmpl free list modified: page 0xfffffd806278f000; item addr 0xfffffd806278f320; offset 0x2c=0xdeaf4151 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 450020 14090 32767 0x10 0 1 syz-executor *224573 14090 32767 0x10 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83064964) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff835e3be0,1,ffff8000371fb3d8) at pool_do_get+0x5e6 pool_get(ffffffff835e3be0,1) at pool_get+0x141 shmget_allocate_segment(ffff800035bce7c0,ffff8000371fb630,0,ffff8000371fb580) at shmget_allocate_segment+0x1a7 sys_shmget(ffff800035bce7c0,ffff8000371fb630,ffff8000371fb580) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff8000371fb630) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371fb630) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdfbc6972d50, 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 0xfffffd806278f000; item addr 0xfffffd806278f320; offset 0x2c=0xdeaf4151 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83064964) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff835e3be0,1,ffff8000371fb3d8) at pool_do_get+0x5e6 pool_get(ffffffff835e3be0,1) at pool_get+0x141 shmget_allocate_segment(ffff800035bce7c0,ffff8000371fb630,0,ffff8000371fb580) at shmget_allocate_segment+0x1a7 sys_shmget(ffff800035bce7c0,ffff8000371fb630,ffff8000371fb580) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff8000371fb630) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371fb630) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdfbc6972d50, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000371fb220 rbx 0xffffffff83475dbf cpu_info_full_primary+0x2dbf rdx 0 rcx 0xffff800035bce7c0 rax 0xffffffff83474ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x52f30d36a2cac05 r11 0xf7af469dab2591fc r12 0xffffffff83475bc0 cpu_info_full_primary+0x2bc0 r13 0 r14 0 r15 0x1 rip 0xffffffff814a0545 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371fb210 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=224573 pid=14090 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800035bcecd0,0xffffffff835c82d8 process=0xffff800035bd0db8 user=0xffff8000371f6000, vmspace=0xfffffd806c285a50 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14090 450020 76084 32767 7 0x10 syz-executor 14090 257967 76084 32767 3 0x4000090 fsleep syz-executor *14090 224573 76084 32767 7 0x4000010 syz-executor 14415 220225 78981 32767 3 0x90 nanoslp syz-executor 14415 493206 78981 32767 3 0x4000090 kqread syz-executor 14415 325096 78981 32767 3 0x4000090 kqsel syz-executor 14415 420189 78981 32767 3 0x4000090 fsleep syz-executor 18199 163823 64705 32767 3 0x90 nanoslp syz-executor 18199 410777 64705 32767 3 0x4000090 kqsel syz-executor 18199 456562 64705 32767 3 0x4000090 fsleep syz-executor 18199 285017 64705 32767 3 0x4000090 fsleep syz-executor 24092 487915 27531 32767 3 0x90 nanoslp syz-executor 24092 442170 27531 32767 3 0x4000090 sbwait syz-executor 24092 155753 27531 32767 3 0x4000090 fsleep syz-executor 31915 187270 0 0 3 0x14200 bored sosplice 64705 237650 56441 32767 3 0x90 nanoslp syz-executor 98344 206601 90745 32767 3 0x10 biowait syz-executor 76084 26881 86571 32767 3 0x90 nanoslp syz-executor 80848 374124 5699 32767 3 0x90 wait syz-executor 78981 489208 59166 32767 3 0x90 nanoslp syz-executor 92669 454226 70276 32767 3 0x10 biowait syz-executor 27531 374577 13013 32767 3 0x90 nanoslp syz-executor 86571 382005 85996 0 3 0x82 wait syz-executor 56441 376569 85996 0 3 0x82 wait syz-executor 90745 225714 85996 0 3 0x82 wait syz-executor 4140 39149 85996 0 3 0x82 wait syz-executor 59166 514137 85996 0 3 0x82 wait syz-executor 70276 294532 85996 0 3 0x82 wait syz-executor 5699 384895 85996 0 3 0x82 wait syz-executor 13013 178837 85996 0 3 0x82 wait syz-executor 85996 391778 93991 0 3 0x82 kqread syz-executor 93991 379311 99154 0 3 0x10008a sigsusp ksh 99154 510027 8541 0 3 0x98 kqread sshd-session 8541 382035 87487 0 3 0x92 kqread sshd-session 27305 158166 1 0 3 0x100083 ttyin getty 87487 182172 1 0 3 0x88 kqread sshd 25972 371551 96431 73 3 0x1100090 kqread syslogd 96431 57322 1 0 3 0x100082 sbwait syslogd 42964 519360 1 0 3 0x100080 kqread resolvd 26958 120341 42976 77 3 0x100092 kqread dhcpleased 83041 10571 42976 77 3 0x100092 kqread dhcpleased 42976 368153 1 0 3 0x80 kqread dhcpleased 90699 328330 0 0 3 0x14200 bored smr 17125 383274 0 0 3 0x14200 pgzero zerothread 99544 318833 0 0 3 0x14200 aiodoned aiodoned 56833 476162 0 0 3 0x14200 syncer update 79644 69554 0 0 3 0x14200 cleaner cleaner 9032 141893 0 0 3 0x14200 reaper reaper 65715 300387 0 0 3 0x14200 pgdaemon pagedaemon 26818 140651 0 0 3 0x14200 bored viomb 44793 89177 0 0 3 0x40014200 acpi0 acpi0 21757 519910 0 0 3 0x40014200 idle1 67265 195889 0 0 3 0x14200 bored softnet3 5728 310941 0 0 3 0x14200 bored softnet2 90043 304045 0 0 3 0x14200 bored softnet1 56305 415044 0 0 3 0x14200 bored softnet0 99728 104737 0 0 3 0x14200 bored systqmp 33059 250443 0 0 3 0x14200 bored systq 94821 46894 0 0 3 0x14200 tmoslp softclockmp 91662 367546 0 0 3 0x40014200 tmoslp softclock 51299 365767 0 0 3 0x40014200 idle0 1 271451 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 (0xffffffff835e3bf0) #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+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:178 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 14090 (syz-executor) thread 0xffff800035bce7c0 (224573) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835df920) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #1 syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff835e3bf0) #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+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:178 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 98344 (syz-executor) thread 0xffff80003179dbf8 (206601) exclusive rrwlock inode r = 0 (0xfffffd8070714d68) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:169 #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:3099 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d0d7a38) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3084 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 92669 (syz-executor) thread 0xffff8000ffff6528 (454226) exclusive rrwlock inode r = 0 (0xfffffd806a91d0a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:169 #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:3099 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d0d75f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3084 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [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 10212 11051K 11059K 166960K 11292 0 pcb 17 12K 12K 166960K 17 0 rtable 242 6K 7K 166960K 374 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 0 0K 0K 166960K 1 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 28K 166960K 92 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1364 86K 86K 166960K 1461 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 19 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 23 85K 125K 166960K 443 0 sigio 0 0K 0K 166960K 7 0 proc 61 91K 115K 166960K 511 0 subproc 104 6K 6K 166960K 104 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 63 0 in_multi 99 7K 7K 166960K 122 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 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 653 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 251 74K 90K 166960K 5764 0 UVM aobj 84 4K 4K 166960K 86 0 pinsyscall 44 88K 112K 166960K 1486 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 21 0 NDP 11 0K 2K 166960K 27 0 temp 76 6824K 6888K 166960K 5295 0 kqueue 13 20K 26K 166960K 61 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 68 0 65 1 0 1 1 0 8 0 rtentry 112 117 0 3 4 0 4 4 0 8 0 unpcb 144 417 0 400 2 0 2 2 0 8 1 syncache 336 11 0 11 1 0 1 1 0 8 1 tcpqe 32 3 0 3 1 0 1 1 0 8 1 tcpcb 808 208 0 200 5 0 5 5 0 8 3 arp 120 18 0 0 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 0 1 0 1 1 0 8 0 inpcb 336 616 0 605 10 0 10 10 0 8 8 nd6 136 30 0 2 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 256 473 0 4 30 0 30 30 0 8 0 art_table 32 474 0 4 4 0 4 4 0 8 0 art_node 16 116 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 4 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 83 0 2 3 0 3 3 0 8 0 pool(0xffffffff835e3be0:shmpl): page inconsistency: page 0xfffffd806278f000; 23 on list, 11 missing, 35 items per page dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2037 0 535 95 0 95 95 0 8 0 ffsino 272 2037 0 535 101 0 101 101 0 8 0 nchpl 144 2644 0 972 63 0 63 63 0 8 0 uvmvnodes 80 2150 0 0 44 0 44 44 0 8 0 vnodes 216 2150 0 0 120 0 120 120 0 8 0 namei 1024 9007 0 9005 2 1 1 2 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 7612 0 7610 4 1 3 3 1 8 2 plimitpl 152 150 0 125 2 0 2 2 0 8 1 sigapl 424 729 0 675 8 1 7 8 0 8 0 futexpl 64 4684 0 4679 1 0 1 1 0 8 0 knotepl 120 319 0 0 10 0 10 10 0 8 0 kqueuepl 216 131 0 119 3 0 3 3 0 8 2 pipepl 320 199 0 172 8 0 8 8 0 8 5 fdescpl 496 710 0 675 7 2 5 6 0 8 0 filepl 152 4112 0 3870 18 0 18 18 0 8 6 lockfpl 104 80 0 77 1 0 1 1 0 8 0 lockfspl 48 33 0 30 1 0 1 1 0 8 0 sessionpl 144 27 0 11 1 0 1 1 0 8 0 pgrppl 48 45 0 21 1 0 1 1 0 8 0 ucredpl 104 756 0 737 1 0 1 1 0 8 0 zombiepl 144 677 0 675 1 0 1 1 0 8 0 processpl 1160 729 0 675 5 0 5 5 0 8 0 procpl 648 1286 0 1222 7 0 7 7 0 8 1 sosppl 168 4 0 4 1 0 1 1 0 8 1 sockpl 664 1109 0 1078 12 0 12 12 0 8 9 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 130 0 0 17 0 17 17 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 702 0 0 44 0 44 44 0 8 0 bufpl 280 2807 0 94 194 0 194 194 0 8 0 anonpl 24 198231 0 194870 71 1 70 70 0 185 38 amapchunkpl 152 19176 0 18616 39 0 39 39 0 158 14 amappl16 200 5882 0 5866 35 21 14 27 0 8 13 amappl15 192 8 0 8 2 1 1 1 0 8 1 amappl14 184 121 0 111 1 0 1 1 0 8 0 amappl13 176 15 0 15 1 1 0 1 0 8 0 amappl12 168 1338 0 1303 3 1 2 3 0 8 0 amappl11 160 54 0 44 1 0 1 1 0 8 0 amappl10 152 11 0 11 1 1 0 1 0 8 0 amappl9 144 134 0 134 1 1 0 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 96 0 86 1 0 1 1 0 8 0 amappl6 120 166 0 164 1 0 1 1 0 8 0 amappl5 112 140 0 132 1 0 1 1 0 8 0 amappl4 104 300 0 284 1 0 1 1 0 8 0 amappl3 96 3480 0 3377 4 0 4 4 0 8 0 amappl2 88 1039 0 955 3 0 3 3 0 8 0 amappl1 80 9708 0 9177 13 0 13 13 0 8 0 amappl 88 5364 0 5167 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 85 0 2 2 0 2 2 0 8 0 uaddrrnd 24 710 0 675 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 710 0 675 1 0 1 1 0 8 0 vmmpekpl 168 7741 0 7707 2 0 2 2 0 8 0 vmmpepl 168 54630 0 52712 109 0 109 109 0 357 14 vmsppl 440 709 0 675 5 0 5 5 0 8 0 rwobjpl 56 22986 0 19903 50 1 49 49 0 8 2 pdppl 4096 1427 0 1350 115 32 83 97 0 8 6 pvpl 32 17463 0 0 141 0 141 141 0 265 0 pmappl 248 709 0 675 4 1 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 434 0 35 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(ffffffff83064964) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff835e3be0,1,ffff8000371fb3d8) at pool_do_get+0x5e6 pool_get(ffffffff835e3be0,1) at pool_get+0x141 shmget_allocate_segment(ffff800035bce7c0,ffff8000371fb630,0,ffff8000371fb580) at shmget_allocate_segment+0x1a7 sys_shmget(ffff800035bce7c0,ffff8000371fb630,ffff8000371fb580) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff8000371fb630) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371fb630) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdfbc6972d50, count: -8 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 end of kernel end trace frame: 0x7e2f2e59d350, count: 12 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 end of kernel end trace frame: 0x7e2f2e59d350, count: -3