panic: kernel diagnostic assertion "atomic_load_int(&fdp->fd_nuserevents) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_descrip.c", line 1218 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 3558 70829 0 0 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83370106) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833b078c,ffffffff83304eb6,4c2,ffffffff833408f7) at __assert+0x29 sys/kern/subr_prf.c:-1 fdfree(ffff80003901ca88) at fdfree+0x349 exit1(ffff80003901ca88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003901ca88,ffff800031c074f0,ffff800031c07440) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800031c074f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031c074f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78d115056320, 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: kernel diagnostic assertion "atomic_load_int(&fdp->fd_nuserevents) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_descrip.c", line 1218 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83370106) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833b078c,ffffffff83304eb6,4c2,ffffffff833408f7) at __assert+0x29 sys/kern/subr_prf.c:-1 fdfree(ffff80003901ca88) at fdfree+0x349 exit1(ffff80003901ca88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003901ca88,ffff800031c074f0,ffff800031c07440) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800031c074f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031c074f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78d115056320, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800031c07230 rbx 0xffffffff83828ddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff80003901ca88 rax 0xffffffff83827ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe004783f3e4ea8de r11 0x7c96d7ae87a0a4d4 r12 0xffffffff83828be0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff811b9065 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800031c07220 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=124912 pid=20586 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003901ca88 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003901c7f0,0xffff80003901c038 process=0xffff800039025880 user=0xffff800031c02000, vmspace=0xfffffd806b890208 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 70829 41523 57871 0 2 0 syz-executor 70829 3558 57871 0 7 0x4000000 syz-executor 28751 59991 73795 0 2 0xc80 syz-executor 28751 502848 73795 0 3 0x4000080 sbwait syz-executor 28751 431832 73795 0 3 0x4000080 sbwait syz-executor 28751 253313 73795 0 3 0x4000080 fsleep syz-executor 50119 361125 1 0 3 0x100083 ttyin getty 49459 264018 0 0 3 0x14200 acct acct 42305 194866 0 0 3 0x14200 bored sosplice 98295 97805 50069 0 2 0x2 syz-executor 90359 485792 50069 0 2 0xc82 syz-executor 73795 437124 50069 0 2 0xc82 syz-executor 38241 186122 50069 0 2 0x2 syz-executor 13453 404661 50069 0 2 0xc82 syz-executor 95949 146688 50069 0 2 0xc82 syz-executor 57871 39511 50069 0 2 0xc82 syz-executor 47548 160991 50069 0 2 0xc82 syz-executor 50069 164297 16998 0 3 0x82 kqread syz-executor 16998 440860 40182 0 3 0x10008a sigsusp ksh 40182 251440 53748 0 3 0x98 kqread sshd-session 53748 391102 3949 0 3 0x92 kqread sshd-session 3949 417637 1 0 3 0x88 kqread sshd 80161 261551 53037 74 3 0x1100092 bpf pflogd 53037 477984 1 0 3 0x80 sbwait pflogd 49182 370374 25149 73 3 0x1100090 kqread syslogd 25149 514102 1 0 3 0x100082 sbwait syslogd 84991 285413 1 0 3 0x100080 kqread resolvd 65848 125314 80370 77 3 0x100092 kqread dhcpleased 41439 315566 80370 77 3 0x100092 kqread dhcpleased 80370 266349 1 0 3 0x80 kqread dhcpleased 80533 39575 0 0 2 0x14200 smr 11938 292890 0 0 2 0x14200 zerothread 62175 83591 0 0 3 0x14200 aiodoned aiodoned 70075 89762 0 0 3 0x14200 syncer update 61709 223055 0 0 3 0x14200 cleaner cleaner 21718 294982 0 0 3 0x14200 reaper reaper 51023 153455 0 0 3 0x14200 pgdaemon pagedaemon 63779 183696 0 0 3 0x14200 bored viomb 82629 275383 0 0 3 0x40014200 acpi0 acpi0 3119 494229 0 0 3 0x40014200 idle1 25782 413798 0 0 3 0x14200 bored softnet7 69361 9021 0 0 3 0x14200 bored softnet6 77487 73418 0 0 3 0x14200 bored softnet5 42997 8525 0 0 3 0x14200 bored softnet4 19965 98993 0 0 3 0x14200 bored softnet3 33406 500782 0 0 3 0x14200 bored softnet2 20825 182425 0 0 3 0x14200 bored softnet1 51073 395985 0 0 3 0x14200 bored softnet0 99182 375301 0 0 3 0x14200 bored systqmp 29243 141980 0 0 3 0x14200 bored systq 24711 127870 0 0 3 0x14200 tmoslp softclockmp 82780 111189 0 0 2 0x40014200 softclock 8126 41862 0 0 3 0x40014200 idle0 1 505342 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 98295 (syz-executor) thread 0xffff8000ffff3a00 (97805) exclusive rrwlock inode r = 0 (0xfffffd806f576d80) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ea5ceb8) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #10 namei+0x7ca sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #13 Xsyscall+0x128 Process 38241 (syz-executor) thread 0xffff8000ffff2a70 (186122) exclusive rrwlock inode r = 0 (0xfffffd806e0a4348) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ced2a10) #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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10252 11161K 11631K 166960K 12773 0 pcb 17 14K 16K 166960K 265 0 rtable 216 10K 10K 166960K 435 0 pf 36 17K 81K 166960K 122 0 ifaddr 44 8K 8K 166960K 94 0 ifgroup 57 2K 2K 166960K 147 0 sysctl 4 1K 9K 166960K 13 0 counters 70 37K 38K 166960K 178 0 ioctlops 0 0K 4K 166960K 1840 0 iov 1 0K 28K 166960K 71 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1485 93K 94K 166960K 2363 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 35 0 dirhash 12 2K 2K 166960K 48 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 236K 166960K 1160 0 sigio 0 0K 0K 166960K 21 0 proc 72 115K 164K 166960K 650 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 432 0 in_multi 99 7K 7K 166960K 147 0 ether_multi 1 0K 0K 166960K 14 0 mrt 2 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 468 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 241 160K 174K 166960K 12255 0 UVM aobj 17 2K 2K 166960K 19 0 pinsyscall 41 82K 102K 166960K 2273 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 54 0 NDP 13 0K 2K 166960K 62 0 temp 67 8650K 8726K 166960K 30350 0 kqueue 14 22K 30K 166960K 253 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 120 180 0 177 3 2 1 3 0 8 0 rtentry 176 135 0 47 5 0 5 5 0 8 0 unpcb 144 714 0 695 5 1 4 4 0 8 3 syncache 336 5 0 5 3 3 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 525 0 519 8 4 4 7 0 8 3 arp 128 17 0 5 1 0 1 1 0 8 0 inpcb 328 1310 0 1301 7 3 4 7 0 8 2 nd6 144 20 0 1 1 0 1 1 0 8 0 pkpcb 40 8 0 8 3 2 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 47 0 46 1 0 1 1 0 8 0 pppxif 1504 6 0 6 1 0 1 1 0 8 1 pffrag 232 11 0 4 1 0 1 1 0 482 0 pffrnode 88 11 0 4 1 0 1 1 0 8 0 pffrent 40 16 0 9 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 7 0 7 2 1 1 1 0 8 1 pfstitem 24 75 0 20 1 0 1 1 0 8 0 pfstkey 128 75 0 20 2 0 2 2 0 8 0 pfstate 384 75 0 20 6 0 6 6 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 640 0 238 31 2 29 30 0 8 2 art_table 40 643 0 238 5 0 5 5 0 8 0 art_node 32 134 0 60 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 9 1 0 1 1 0 8 0 semapl 112 33 0 23 1 0 1 1 0 8 0 shmpl 112 16 0 2 1 0 1 1 0 8 0 dirhash 1024 41 0 24 3 0 3 3 0 8 0 dino2pl 256 3543 0 2030 95 0 95 95 0 8 0 ffsino 296 3543 0 2030 117 0 117 117 0 8 0 nchpl 144 5230 0 3534 64 0 64 64 0 8 0 rtmask 32 8 0 8 1 0 1 1 0 8 1 uvmvnodes 80 4220 0 0 87 0 87 87 0 8 0 vnodes 216 4220 0 0 235 0 235 235 0 8 0 namei 1024 17079 0 17079 4 3 1 2 0 8 1 percpumem 16 104 0 54 1 0 1 1 0 8 0 kstatmem 264 94 0 66 3 0 3 3 0 8 0 scsiplug 72 7 0 7 3 2 1 1 0 8 1 scxspl 216 31704 0 31704 10 6 4 8 1 8 4 plimitpl 152 370 0 352 1 0 1 1 0 8 0 sigapl 424 1467 0 1413 7 0 7 7 0 8 0 knotepl 120 753 0 0 23 0 23 23 0 8 0 kqueuepl 224 416 0 406 3 2 1 3 0 8 0 pipepl 344 195 0 168 3 0 3 3 0 8 0 fdescpl 528 1441 0 1411 3 0 3 3 0 8 0 filepl 160 8603 0 8383 16 0 16 16 0 8 5 lockfpl 104 638 0 636 2 0 2 2 0 8 1 lockfspl 48 250 0 248 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 57 0 40 1 0 1 1 0 8 0 ucredpl 104 1325 0 1311 1 0 1 1 0 8 0 zombiepl 144 1417 0 1413 1 0 1 1 0 8 0 processpl 1248 1467 0 1413 5 0 5 5 0 8 0 procpl 664 3169 0 3111 7 1 6 7 0 8 0 sosppl 168 11 0 11 1 0 1 1 0 8 1 sockpl 752 2245 0 2214 12 1 11 12 0 8 7 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 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 112 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 12 0 0 1 0 1 1 0 8 0 mbufpl 256 339 0 0 22 0 22 22 0 8 0 bufpl 280 13606 0 7463 440 0 440 440 0 8 0 anonpl 32 13682 0 0 111 0 111 111 0 246 0 amapchunkpl 152 41468 0 40982 34 6 28 28 0 158 3 amappl16 200 5724 0 5688 60 32 28 34 0 8 17 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 115 0 103 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 2127 0 2097 3 1 2 2 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 281 0 281 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 132 0 119 1 0 1 1 0 8 0 amappl6 120 184 0 181 1 0 1 1 0 8 0 amappl5 112 125 0 115 1 0 1 1 0 8 0 amappl4 104 306 0 286 1 0 1 1 0 8 0 amappl3 96 8200 0 8090 4 0 4 4 0 8 0 amappl2 88 685 0 621 2 0 2 2 0 8 0 amappl1 80 12538 0 11930 14 1 13 14 0 8 0 amappl 88 11370 0 11203 5 0 5 5 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 8 0 8 2 2 0 1 0 8 0 dma128 128 257 0 257 4 3 1 1 0 8 1 dma64 64 8 0 8 3 2 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 18 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1441 0 1411 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1441 0 1411 1 0 1 1 0 8 0 vmmpekpl 168 12416 0 12376 3 0 3 3 0 8 0 vmmpepl 168 96129 0 94159 120 9 111 117 0 357 10 vmsppl 488 1440 0 1411 5 1 4 5 0 8 0 rwobjpl 80 31208 0 26019 114 0 114 114 0 8 1 pdppl 4096 2889 0 2822 105 34 71 85 0 8 4 pvpl 32 22063 0 0 179 1 178 178 0 265 0 pmappl 256 1440 0 1411 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 304 0 49 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(ffffffff83370106) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833b078c,ffffffff83304eb6,4c2,ffffffff833408f7) at __assert+0x29 sys/kern/subr_prf.c:-1 fdfree(ffff80003901ca88) at fdfree+0x349 exit1(ffff80003901ca88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003901ca88,ffff800031c074f0,ffff800031c07440) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800031c074f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031c074f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78d115056320, 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(ffffffff8394fb18) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8394fb18) at __mp_lock+0x199 sys/kern/kern_lock.c:165 sysctl_file(ffff800038815598,4,200000000100,ffff8000388155c8,ffff80003901c028) at sysctl_file+0x27ef sys/kern/kern_sysctl.c:1784 kern_sysctl(ffff800038815594,5,200000000100,ffff8000388155c8,0,37,3074a293280deebb) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:733 sys_sysctl(ffff80003901c028,ffff800038815700,ffff800038815650) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff800038815700) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800038815700) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdfff3fbe740, count: 6 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(ffffffff8394fb18) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8394fb18) at __mp_lock+0x199 sys/kern/kern_lock.c:165 sysctl_file(ffff800038815598,4,200000000100,ffff8000388155c8,ffff80003901c028) at sysctl_file+0x27ef sys/kern/kern_sysctl.c:1784 kern_sysctl(ffff800038815594,5,200000000100,ffff8000388155c8,0,37,3074a293280deebb) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:733 sys_sysctl(ffff80003901c028,ffff800038815700,ffff800038815650) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff800038815700) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800038815700) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdfff3fbe740, count: -9