panic: pool_do_get: shmpl free list modified: page 0xfffffd806c581000; item addr 0xfffffd806c581070; offset 0x40=0x6a0390be Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 218734 82215 0 0x2 0 1 syz-executor *324551 74673 32767 0x10 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8344c536) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839d5180,1,ffff80002af8aa28) at pool_do_get+0x5df pool_get(ffffffff839d5180,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff800039fc9248,ffff80002af8ac80,5d,ffff80002af8abd0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff800039fc9248,ffff80002af8ac80,ffff80002af8abd0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80002af8ac80) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002af8ac80) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc63b9db3f60, 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 0xfffffd806c581000; item addr 0xfffffd806c581070; offset 0x40=0x6a0390be ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8344c536) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839d5180,1,ffff80002af8aa28) at pool_do_get+0x5df pool_get(ffffffff839d5180,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff800039fc9248,ffff80002af8ac80,5d,ffff80002af8abd0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff800039fc9248,ffff80002af8ac80,ffff80002af8abd0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80002af8ac80) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002af8ac80) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc63b9db3f60, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002af8a850 rbx 0xffffffff838c0e07 cpu_info_full_primary+0x2e07 rdx 0xffff8000015aadc0 rcx 0xffff800039fc9248 rax 0xffffffff838bfff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf486ced6d0ed388d r11 0x9428dd5a2d64de8b r12 0xffffffff838c0c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff81f3e185 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002af8a840 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=324551 pid=74673 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=0xffff800039fe2d20,0xffff800039fc87f8 process=0xffff800039fe4020 user=0xffff80002af85000, vmspace=0xfffffd800d45bd80 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 82215 218734 94816 0 7 0x2 syz-executor 74673 369353 58129 32767 2 0x10 syz-executor *74673 324551 58129 32767 7 0x4000010 syz-executor 22055 466616 83980 32767 3 0x90 nanoslp syz-executor 22055 180321 83980 32767 3 0x4000090 sbwait syz-executor 22055 40759 83980 32767 3 0x4000090 fsleep syz-executor 22055 421413 83980 32767 3 0x4000090 fsleep syz-executor 48517 424211 39541 32767 3 0x90 nanoslp syz-executor 62854 216014 8851 32767 3 0x10 biowait syz-executor 19699 397847 48200 32767 3 0x90 piperd syz-executor 11336 238904 85011 32767 3 0x90 piperd syz-executor 83980 266838 88638 32767 3 0x90 nanoslp syz-executor 58129 418847 20515 32767 3 0x90 nanoslp syz-executor 88638 228247 94816 0 3 0x82 wait syz-executor 85011 510986 94816 0 3 0x82 wait syz-executor 48200 267485 94816 0 3 0x82 wait syz-executor 39541 191709 94816 0 3 0x82 wait syz-executor 20515 232181 94816 0 3 0x82 wait syz-executor 8851 336522 94816 0 3 0x82 wait syz-executor 94816 307879 75319 0 3 0x82 nanoslp syz-executor 75319 493786 33170 0 3 0x10008a sigsusp ksh 33170 149880 785 0 3 0x98 kqread sshd-session 785 107147 77100 0 3 0x92 kqread sshd-session 10207 391830 1 0 3 0x100083 ttyin getty 77100 148661 1 0 3 0x88 kqread sshd 34246 53480 43816 73 3 0x1100090 kqread syslogd 43816 135323 1 0 3 0x100082 sbwait syslogd 25552 226164 1 0 3 0x100080 kqread resolvd 48446 438101 3206 77 3 0x100092 kqread dhcpleased 65995 348479 3206 77 3 0x100092 kqread dhcpleased 3206 442756 1 0 3 0x80 kqread dhcpleased 42488 45935 0 0 3 0x14200 bored smr 70771 414600 0 0 2 0x14200 zerothread 59375 37866 0 0 3 0x14200 aiodoned aiodoned 25775 405049 0 0 3 0x14200 syncer update 48484 397154 0 0 3 0x14200 cleaner cleaner 45504 240902 0 0 3 0x14200 reaper reaper 44953 105201 0 0 3 0x14200 pgdaemon pagedaemon 84652 4600 0 0 3 0x14200 bored viomb 271 123103 0 0 3 0x40014200 acpi0 acpi0 57085 516414 0 0 3 0x40014200 idle1 53080 193448 0 0 3 0x14200 bored softnet1 86059 405015 0 0 3 0x14200 bored softnet0 6212 60128 0 0 3 0x14200 bored systqmp 17787 420177 0 0 3 0x14200 bored systq 92380 369513 0 0 3 0x14200 tmoslp softclockmp 69433 208315 0 0 3 0x40014200 tmoslp softclock 67333 296018 0 0 3 0x40014200 idle0 1 375911 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 (0xffffffff839d5198) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:484 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 82215 (syz-executor) thread 0xffff800039fc87e8 (218734) shared rwlock uobjlk r = 0 (0xfffffd806dbdca30) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd807e53ae70) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 74673 (syz-executor) thread 0xffff800039fc9248 (324551) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a337c0) #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:783 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839d5198) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:484 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 62854 (syz-executor) thread 0xffff8000fffef240 (216014) exclusive rrwlock inode r = 0 (0xfffffd806c6e98f0) #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+0xbd 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:3143 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d99f9e8) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #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:3128 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11051 12014K 12034K 166960K 12148 0 pcb 17 12K 12K 166960K 17 0 rtable 195 5K 7K 166960K 354 0 pf 27 16K 16K 166960K 31 0 ifaddr 34 6K 7K 166960K 44 0 ifgroup 42 1K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 66 36K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 35 0 iov 0 0K 17K 166960K 44 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1288 81K 81K 166960K 1649 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 13 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 62K 121K 166960K 399 0 sigio 0 0K 0K 166960K 2 0 proc 61 115K 147K 166960K 513 0 subproc 54 3K 4K 166960K 360 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 22 0 in_multi 77 5K 7K 166960K 109 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 401 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 208 151K 187K 166960K 4541 0 UVM aobj 11 2K 2K 166960K 12 0 pinsyscall 39 78K 109K 166960K 1482 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 11 0 NDP 9 0K 2K 166960K 27 0 temp 32 9071K 9136K 166960K 5054 0 kqueue 13 20K 27K 166960K 59 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 37 1 0 1 1 0 8 0 rtentry 176 112 0 23 6 0 6 6 0 8 0 unpcb 144 130 0 113 1 0 1 1 0 8 0 syncache 336 8 0 8 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 78 0 73 1 0 1 1 0 8 0 arp 136 18 0 4 1 0 1 1 0 8 0 inpcb 328 195 0 186 2 0 2 2 0 8 0 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 2 0 2 1 0 1 1 0 8 1 nd6 152 25 0 6 1 0 1 1 0 8 0 kcovpl 48 40 0 34 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 464 0 88 29 0 29 29 0 8 2 art_table 40 465 0 88 5 0 5 5 0 8 0 art_node 32 112 0 31 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 9 0 1 1 0 1 1 0 8 0 pool(0xffffffff839d5180:shmpl): page inconsistency: page 0xfffffd806c581000; 26 on list, 8 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1775 0 277 94 0 94 94 0 8 0 ffsino 296 1775 0 277 116 0 116 116 0 8 0 nchpl 144 2148 0 427 64 0 64 64 0 8 0 vnodes 216 2144 0 0 120 0 120 120 0 8 0 namei 1024 7029 0 7028 1 0 1 1 0 8 0 percpumem 16 50 0 2 1 0 1 1 0 8 0 kstatmem 264 25 0 4 2 0 2 2 0 8 0 scxspl 216 7302 0 7301 4 3 1 3 1 8 0 plimitpl 152 121 0 98 2 0 2 2 0 8 1 sigapl 424 625 0 579 7 0 7 7 0 8 0 knotepl 120 344 0 0 11 0 11 11 0 8 0 kqueuepl 224 68 0 59 1 0 1 1 0 8 0 pipepl 344 232 0 205 4 0 4 4 0 8 0 fdescpl 528 609 0 579 3 0 3 3 0 8 0 filepl 160 2867 0 2678 12 0 12 12 0 8 2 lockfpl 104 81 0 79 1 0 1 1 0 8 0 lockfspl 48 32 0 30 1 0 1 1 0 8 0 sessionpl 144 66 0 51 1 0 1 1 0 8 0 pgrppl 48 107 0 85 1 0 1 1 0 8 0 ucredpl 104 291 0 274 1 0 1 1 0 8 0 zombiepl 144 580 0 579 1 0 1 1 0 8 0 processpl 1232 625 0 579 5 0 5 5 0 8 0 procpl 664 879 0 829 6 0 6 6 0 8 0 sockpl 752 365 0 336 5 0 5 5 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k 2048 11 0 0 2 0 2 2 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 205 0 0 13 0 13 13 0 8 0 bufpl 280 2532 0 101 174 0 174 174 0 8 0 anonpl 32 7444 0 0 61 0 61 61 0 246 0 amapchunkpl 152 13444 0 13025 30 0 30 30 0 158 6 amappl16 200 2040 0 2023 15 5 10 14 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 422 0 421 1 0 1 1 0 8 0 amappl13 176 119 0 109 1 0 1 1 0 8 0 amappl12 168 857 0 829 2 0 2 2 0 8 0 amappl11 160 8 0 7 2 1 1 1 0 8 0 amappl10 152 60 0 50 1 0 1 1 0 8 0 amappl9 144 347 0 347 1 1 0 1 0 8 0 amappl8 136 94 0 93 1 0 1 1 0 8 0 amappl7 128 140 0 128 1 0 1 1 0 8 0 amappl6 120 169 0 168 1 0 1 1 0 8 0 amappl5 112 96 0 87 1 0 1 1 0 8 0 amappl4 104 266 0 249 1 0 1 1 0 8 0 amappl3 96 2505 0 2406 5 1 4 4 0 8 0 amappl2 88 528 0 477 2 0 2 2 0 8 0 amappl1 80 11335 0 10783 17 0 17 17 0 8 2 amappl 88 3792 0 3647 5 0 5 5 0 92 0 uvmvnodes 80 106 0 0 3 0 3 3 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 11 0 1 1 0 1 1 0 8 0 uaddrrnd 24 609 0 579 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 609 0 579 1 0 1 1 0 8 0 vmmpekpl 168 8047 0 8000 3 0 3 3 0 8 0 vmmpepl 168 48653 0 46936 106 0 106 106 0 357 15 vmsppl 488 608 0 579 7 1 6 6 0 8 1 rwobjpl 80 16623 0 15722 25 0 25 25 0 8 1 pdppl 4096 1225 0 1158 105 30 75 95 0 8 8 pvpl 32 14602 0 0 120 2 118 119 0 265 0 pmappl 256 608 0 579 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 274 0 33 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(ffffffff8344c536) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839d5180,1,ffff80002af8aa28) at pool_do_get+0x5df pool_get(ffffffff839d5180,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff800039fc9248,ffff80002af8ac80,5d,ffff80002af8abd0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff800039fc9248,ffff80002af8ac80,ffff80002af8abd0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80002af8ac80) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002af8ac80) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc63b9db3f60, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299adff0) 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(ffffffff83a32fc0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a32fc0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 sysctl_vslock(7617bd6b69b0,10) at sysctl_vslock+0x80 sys/kern/kern_sysctl.c:197 sys_sysctl(ffff800039fc87e8,ffff80002a2f3fb0,ffff80002a2f3f00) at sys_sysctl+0x371 sys/kern/kern_sysctl.c:304 syscall(ffff80002a2f3fb0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2f3fb0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7617bd6b6a10, count: 7 ddb{1}> trace x86_ipi_db(ffff8000299adff0) 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(ffffffff83a32fc0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a32fc0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 sysctl_vslock(7617bd6b69b0,10) at sysctl_vslock+0x80 sys/kern/kern_sysctl.c:197 sys_sysctl(ffff800039fc87e8,ffff80002a2f3fb0,ffff80002a2f3f00) at sys_sysctl+0x371 sys/kern/kern_sysctl.c:304 syscall(ffff80002a2f3fb0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2f3fb0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7617bd6b6a10, count: -8