panic: pool_do_get: shmpl free list modified: page 0xfffffd80659f5000; item addr 0xfffffd80659f5af0; offset 0x40=0x6924f061 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *458623 30453 32767 0x10 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a3de8) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839defc0,1,ffff80003c4455a8) at pool_do_get+0x5df pool_get(ffffffff839defc0,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c438560,ffff80003c445800,2,ffff80003c445750) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c438560,ffff80003c445800,ffff80003c445750) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c445800) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c445800) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40f4caa620, 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 0xfffffd80659f5000; item addr 0xfffffd80659f5af0; offset 0x40=0x6924f061 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a3de8) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839defc0,1,ffff80003c4455a8) at pool_do_get+0x5df pool_get(ffffffff839defc0,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c438560,ffff80003c445800,2,ffff80003c445750) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c438560,ffff80003c445800,ffff80003c445750) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c445800) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c445800) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40f4caa620, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4453d0 rbx 0xffffffff83861e07 cpu_info_full_primary+0x2e07 rdx 0xffff80000143bf80 rcx 0xffff80003c438560 rax 0xffffffff83860ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x7108a2fc103b8827 r11 0x6d5819b4d6a7b59d r12 0xffffffff83861c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff81c122f5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4453c0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=458623 pid=30453 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=0xffff80003c4387f8,0xffffffff838db4f8 process=0xffff80003a41eb70 user=0xffff80003c440000, vmspace=0xfffffd806cce3028 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 30453 241911 74302 32767 2 0x10 syz-executor *30453 458623 74302 32767 7 0x4000010 syz-executor 20453 153153 39751 32767 2 0x10 syz-executor 51926 120233 46779 32767 3 0x90 nanoslp syz-executor 51926 92623 46779 32767 3 0x4000090 fifor syz-executor 51926 383365 46779 32767 3 0x4000090 fsleep syz-executor 97045 31625 24465 32767 2 0x10 syz-executor 97045 191124 24465 32767 3 0x4000090 sbwait syz-executor 97045 420210 24465 32767 3 0x4000010 sbufrcv syz-executor 97045 389770 24465 32767 3 0x4000090 sbufrcv syz-executor 20539 444232 73927 32767 3 0x90 nanoslp syz-executor 20539 295579 73927 32767 3 0x4000090 kqread syz-executor 20539 276688 73927 32767 3 0x4000090 fsleep syz-executor 43548 70659 48741 0 3 0x100082 sbwait arp 48741 17221 45498 0 3 0x10008a sigsusp sh 68173 218423 40064 32767 3 0x10 biowait syz-executor 45498 346216 94268 0 3 0x80 wait syz-executor 39751 317590 97357 32767 3 0x90 nanoslp syz-executor 24465 164216 48782 32767 3 0x90 nanoslp syz-executor 17378 65393 57562 32767 3 0x90 nanoslp syz-executor 74302 272683 62728 32767 3 0x90 nanoslp syz-executor 73927 330667 63698 32767 3 0x90 nanoslp syz-executor 46779 437734 96100 32767 3 0x90 nanoslp syz-executor 94268 229971 29974 0 3 0x82 wait syz-executor 48782 110695 29974 0 3 0x82 wait syz-executor 63698 513713 29974 0 3 0x82 wait syz-executor 97357 60595 29974 0 3 0x82 wait syz-executor 96100 344364 29974 0 3 0x82 wait syz-executor 57562 351672 29974 0 3 0x82 wait syz-executor 62728 519019 29974 0 3 0x82 wait syz-executor 40064 80351 29974 0 3 0x82 wait syz-executor 29974 32048 34907 0 3 0x82 kqread syz-executor 34907 438433 89248 0 3 0x10008a sigsusp ksh 89248 339613 57078 0 3 0x98 kqread sshd-session 57078 100835 75621 0 3 0x92 kqread sshd-session 79756 330375 1 0 3 0x100083 ttyin getty 75621 136167 1 0 3 0x88 kqread sshd 16214 277590 15952 73 3 0x1100090 kqread syslogd 15952 353942 1 0 3 0x100082 sbwait syslogd 47954 458526 1 0 3 0x100080 kqread resolvd 58160 451192 82715 77 3 0x100092 kqread dhcpleased 30344 375857 82715 77 3 0x100092 kqread dhcpleased 82715 439471 1 0 3 0x80 kqread dhcpleased 55818 279780 0 0 3 0x14200 bored smr 75218 177286 0 0 2 0x14200 zerothread 96849 4155 0 0 3 0x14200 aiodoned aiodoned 99793 280442 0 0 3 0x14200 syncer update 86164 34651 0 0 3 0x14200 cleaner cleaner 38218 477829 0 0 2 0x14200 reaper 41656 52677 0 0 3 0x14200 pgdaemon pagedaemon 57910 475457 0 0 3 0x14200 bored viomb 30643 59728 0 0 3 0x40014200 acpi0 acpi0 50750 270847 0 0 3 0x40014200 idle1 62123 439064 0 0 3 0x14200 bored softnet1 10633 7763 0 0 3 0x14200 bored softnet0 93562 401832 0 0 3 0x14200 bored systqmp 2353 126662 0 0 3 0x14200 bored systq 21576 471015 0 0 3 0x14200 tmoslp softclockmp 13713 71088 0 0 3 0x40014200 tmoslp softclock 45085 400684 0 0 3 0x40014200 idle0 1 37063 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 (0xffffffff839defd8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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+0x124 sys/kern/subr_pool.c:581 #4 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #5 sys_shmget+0x195 sys/kern/sysv_shm.c:482 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #7 Xsyscall+0x128 CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806cce2910) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824 #4 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #5 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #5 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #6 exit1+0x6fc sys/kern/kern_exit.c:260 #7 sys_exit+0x1a sys/kern/kern_exit.c:-1 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 Process 30453 (syz-executor) thread 0xffff80003c438560 (458623) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839e7f30) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:765 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839defd8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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+0x124 sys/kern/subr_pool.c:581 #4 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #5 sys_shmget+0x195 sys/kern/sysv_shm.c:482 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #7 Xsyscall+0x128 Process 97045 (syz-executor) thread 0xffff80003c439258 (191124) exclusive rwlock sbufrcv r = 0 (0xffff800001426fb0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 soreceive+0x27d sys/kern/uipc_socket.c:878 #4 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #5 sys_recvmmsg+0x410 sys/kern/uipc_syscalls.c:969 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #7 Xsyscall+0x128 Process 68173 (syz-executor) thread 0xffff8000fffe62b8 (218423) exclusive rrwlock inode r = 0 (0xfffffd806cb080e0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 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+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8071734440) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10187 10957K 10973K 166960K 11278 0 pcb 17 12K 12K 166960K 17 0 rtable 221 6K 6K 166960K 330 0 pf 31 16K 16K 166960K 31 0 ifaddr 40 7K 7K 166960K 42 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 6 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 28 0 iov 1 4K 14K 166960K 11 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1361 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 125K 166960K 193 0 sigio 0 0K 0K 166960K 4 0 proc 61 115K 147K 166960K 474 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 21 0 in_multi 89 6K 6K 166960K 90 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 348 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 252 170K 186K 166960K 3535 0 UVM aobj 6 4K 5K 166960K 7 0 pinsyscall 47 94K 114K 166960K 1222 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 3 0 NDP 11 0K 1K 166960K 25 0 temp 37 8666K 8730K 166960K 3925 0 kqueue 14 22K 26K 166960K 43 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 40 0 36 1 0 1 1 0 8 0 rtentry 176 103 0 1 5 0 5 5 0 8 0 unpcb 144 94 0 74 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 113 0 109 7 0 7 7 0 8 6 arp 136 17 0 0 1 0 1 1 0 8 0 inpcb 328 200 0 192 8 0 8 8 0 8 7 nd6 152 21 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 256 412 0 0 26 0 26 26 0 8 0 art_table 40 413 0 0 5 0 5 5 0 8 0 art_node 32 103 0 10 1 0 1 1 0 8 0 semapl 112 7 0 1 1 0 1 1 0 8 0 shmpl 112 4 0 1 1 0 1 1 0 8 0 pool(0xffffffff839defc0:shmpl): page inconsistency: page 0xfffffd80659f5000; 31 on list, 3 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1631 0 124 95 0 95 95 0 8 0 ffsino 296 1631 0 124 117 0 117 117 0 8 0 nchpl 144 1894 0 205 63 0 63 63 0 8 0 vnodes 216 1712 0 0 96 0 96 96 0 8 0 namei 1024 5507 0 5506 1 0 1 1 0 8 0 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 6519 0 6518 9 1 8 8 1 8 7 plimitpl 152 42 0 17 2 0 2 2 0 8 1 sigapl 424 473 0 419 7 0 7 7 0 8 0 knotepl 120 309 0 0 10 0 10 10 0 8 0 kqueuepl 224 43 0 33 1 0 1 1 0 8 0 pipepl 344 115 0 88 3 0 3 3 0 8 0 fdescpl 528 457 0 420 4 0 4 4 0 8 0 filepl 160 1806 0 1594 13 0 13 13 0 8 2 lockfpl 104 17 0 15 1 0 1 1 0 8 0 lockfspl 48 8 0 6 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 30 0 6 1 0 1 1 0 8 0 ucredpl 104 162 0 144 1 0 1 1 0 8 0 zombiepl 144 420 0 419 1 0 1 1 0 8 0 processpl 1232 473 0 419 5 0 5 5 0 8 0 procpl 664 576 0 513 7 0 7 7 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 752 335 0 303 11 0 11 11 0 8 7 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k 2048 36 0 0 5 0 5 5 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 202 0 0 13 0 13 13 0 8 0 bufpl 280 2367 0 119 161 0 161 161 0 8 0 anonpl 32 11585 0 0 94 0 94 94 0 246 0 amapchunkpl 152 10243 0 9730 34 0 34 34 0 158 9 amappl16 200 2561 0 2545 27 0 27 27 0 8 24 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 6 0 6 1 1 0 1 0 8 0 amappl13 176 398 0 395 1 0 1 1 0 8 0 amappl12 168 785 0 740 3 0 3 3 0 8 0 amappl11 160 5 0 5 2 2 0 1 0 8 0 amappl10 152 45 0 35 1 0 1 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 59 0 58 1 0 1 1 0 8 0 amappl7 128 89 0 88 1 0 1 1 0 8 0 amappl6 120 259 0 246 1 0 1 1 0 8 0 amappl5 112 72 0 65 1 0 1 1 0 8 0 amappl4 104 359 0 335 1 0 1 1 0 8 0 amappl3 96 1508 0 1412 3 0 3 3 0 8 0 amappl2 88 565 0 489 2 0 2 2 0 8 0 amappl1 80 8769 0 8189 14 0 14 14 0 8 0 amappl 88 2865 0 2689 5 0 5 5 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 0 8 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 24 457 0 420 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 457 0 420 1 0 1 1 0 8 0 vmmpekpl 168 5287 0 5254 2 0 2 2 0 8 0 vmmpepl 168 37482 0 35477 115 0 115 115 0 357 21 vmsppl 488 456 0 419 7 1 6 6 0 8 0 rwobjpl 80 13955 0 12991 31 0 31 31 0 8 7 pdppl 4096 921 0 838 107 20 87 97 0 8 4 pvpl 32 19078 0 0 154 0 154 154 0 265 0 pmappl 256 456 0 419 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 284 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(ffffffff833a3de8) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839defc0,1,ffff80003c4455a8) at pool_do_get+0x5df pool_get(ffffffff839defc0,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c438560,ffff80003c445800,2,ffff80003c445750) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c438560,ffff80003c445800,ffff80003c445750) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c445800) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c445800) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40f4caa620, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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(ffffffff839e7d28) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839e7d28) at __mp_lock+0x192 sys/kern/kern_lock.c:165 exit1(ffff80003c438a90,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80003c438a90,ffff800036fea8b0,ffff800036fea800) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800036fea8b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036fea8b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78ae166c96f0, count: 7 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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(ffffffff839e7d28) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839e7d28) at __mp_lock+0x192 sys/kern/kern_lock.c:165 exit1(ffff80003c438a90,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80003c438a90,ffff800036fea8b0,ffff800036fea800) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800036fea8b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036fea8b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78ae166c96f0, count: -8