panic: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/setuid/kernel/sys/arch/amd64/amd64/intr.c", line 699 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 337727 58262 32767 0x10 0x4000000 0 syz-executor.5 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279eeb4) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82820513,ffffffff8283fa89,2bb,ffffffff827a57e4) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(adde91d9) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f1d4af8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f1d4af8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121a800,fffffd806f1d4af8,fffffd806f1d4b80,6,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a800,6) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a800) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a800,0,0,1) at exit1+0x3ff sys/kern/kern_exit.c:206 sys_exit(ffff80002121a800,ffff80002e401990,ffff80002e4019e0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e401a60) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e401a60) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73f9ddad0060, count: 2 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: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/setuid/kernel/sys/arch/amd64/amd64/intr.c", line 699 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279eeb4) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82820513,ffffffff8283fa89,2bb,ffffffff827a57e4) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(adde91d9) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f1d4af8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f1d4af8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121a800,fffffd806f1d4af8,fffffd806f1d4b80,6,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a800,6) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a800) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a800,0,0,1) at exit1+0x3ff sys/kern/kern_exit.c:206 sys_exit(ffff80002121a800,ffff80002e401990,ffff80002e4019e0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e401a60) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e401a60) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73f9ddad0060, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e4015d0 rbx 0xffff800020d59b9f rdx 0 rcx 0xffff80002121a800 rax 0xffff800020d58ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x582891c1823d043d r11 0x61f7a4b2c16ff37e r12 0xffff800020d599a0 r13 0 r14 0 r15 0x1 rip 0xffffffff8266b7ec db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002e4015c0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.3) pid=342349 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80002121b548,0xffff80002121a2c0 process=0xffff800029fa2198 user=0xffff80002e3fc000, vmspace=0xfffffd8065f65cd8 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 58262 40719 55351 32767 2 0x10 syz-executor.5 58262 337727 55351 32767 7 0x4000010 syz-executor.5 58262 297321 55351 32767 3 0x4000090 fsleep syz-executor.5 52597 509540 55818 32767 2 0x10 syz-executor.2 52597 122325 55818 32767 3 0x4000090 fsleep syz-executor.2 28495 113928 71345 32767 2 0x10 syz-executor.6 28495 210692 71345 32767 3 0x4000090 fsleep syz-executor.6 44777 479718 69576 32767 2 0x10 syz-executor.4 44777 318231 69576 32767 3 0x4000090 fsleep syz-executor.4 44777 85566 69576 32767 3 0x4000090 fsleep syz-executor.4 42455 173076 85935 32767 2 0x10 syz-executor.0 42455 319673 85935 32767 3 0x4000090 fsleep syz-executor.0 55351 401145 1337 32767 3 0x90 nanoslp syz-executor.5 1337 45683 66074 0 3 0x82 wait syz-executor.5 71345 64275 74222 32767 3 0x90 nanoslp syz-executor.6 74222 451439 66074 0 3 0x82 wait syz-executor.6 51921 280088 72992 32767 3 0x90 nanoslp syz-executor.1 72992 186808 66074 0 3 0x82 wait syz-executor.1 85935 276360 76686 32767 3 0x90 nanoslp syz-executor.0 76686 139672 66074 0 3 0x82 wait syz-executor.0 97826 282671 54163 32767 3 0x90 nanoslp syz-executor.3 54163 15702 66074 0 3 0x82 wait syz-executor.3 64647 198159 0 0 3 0x14200 bored sosplice 58406 165816 68028 32767 3 0x10 biowait syz-executor.7 68028 303035 66074 0 3 0x82 wait syz-executor.7 55818 157835 93622 32767 3 0x90 nanoslp syz-executor.2 69576 414001 56674 32767 3 0x90 nanoslp syz-executor.4 56674 451280 66074 0 3 0x82 wait syz-executor.4 93622 92669 66074 0 3 0x82 wait syz-executor.2 66074 485197 95855 0 3 0x2000082 thrsleep syz-fuzzer 66074 369830 95855 0 3 0x6000082 nanoslp syz-fuzzer 66074 457663 95855 0 3 0x6000082 wait syz-fuzzer 66074 48091 95855 0 3 0x6000082 wait syz-fuzzer 66074 407681 95855 0 3 0x6000082 wait syz-fuzzer 66074 363732 95855 0 3 0x6000082 thrsleep syz-fuzzer 66074 234721 95855 0 3 0x6000082 thrsleep syz-fuzzer 66074 452321 95855 0 3 0x6000082 wait syz-fuzzer 66074 275377 95855 0 3 0x6000082 wait syz-fuzzer 66074 193084 95855 0 3 0x6000082 thrsleep syz-fuzzer 66074 439083 95855 0 3 0x6000082 thrsleep syz-fuzzer 66074 469262 95855 0 3 0x6000082 thrsleep syz-fuzzer 66074 437846 95855 0 3 0x6000082 wait syz-fuzzer 66074 504869 95855 0 3 0x6000082 wait syz-fuzzer 66074 60831 95855 0 3 0x6000082 kqread syz-fuzzer 66074 85426 95855 0 3 0x6000082 wait syz-fuzzer 95855 158127 7530 0 3 0x10008a sigsusp ksh 7530 22353 74209 0 3 0x9a kqread sshd 40748 232957 1 0 3 0x100083 ttyin getty 74209 495378 1 0 3 0x88 kqread sshd 43006 146099 6822 73 3 0x1100090 kqread syslogd 6822 137369 1 0 3 0x100082 netio syslogd 50736 151273 1 0 3 0x100080 kqread resolvd 75793 65769 6549 77 3 0x100092 kqread dhcpleased 43517 38038 6549 77 3 0x100092 kqread dhcpleased 6549 150010 1 0 3 0x80 kqread dhcpleased 60450 301128 0 0 3 0x14200 bored smr 42520 464808 0 0 2 0x14200 zerothread 23323 333520 0 0 3 0x14200 aiodoned aiodoned 26659 198342 0 0 3 0x14200 syncer update 52915 249730 0 0 3 0x14200 cleaner cleaner 3565 194553 0 0 2 0x14200 reaper 10524 15876 0 0 3 0x14200 pgdaemon pagedaemon 53005 504174 0 0 3 0x14200 bored viomb 83854 488270 0 0 3 0x40014200 acpi0 acpi0 52954 261870 0 0 3 0x40014200 idle1 11163 437792 0 0 3 0x14200 bored softnet3 99737 516663 0 0 3 0x14200 bored softnet2 840 82916 0 0 3 0x14200 bored softnet1 80512 430989 0 0 3 0x14200 bored softnet0 60575 280724 0 0 3 0x14200 bored systqmp 70954 361732 0 0 3 0x14200 bored systq 74089 254322 0 0 3 0x40014200 bored softclock 41232 507270 0 0 3 0x40014200 idle0 1 6707 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive sched_lock &sched_lock r = 0 (0xffffffff82cdefb0) #0 witness_lock+0x447 #1 sleep_finish+0x142 sys/kern/kern_synch.c:398 #2 rwsleep+0xab sys/kern/kern_synch.c:300 #3 futex_wait+0x13d sys/kern/sys_futex.c:250 #4 sys_futex+0xfc sys/kern/sys_futex.c:101 #5 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #5 syscall+0x606 sys/arch/amd64/amd64/trap.c:623 #6 Xsyscall+0x128 Process 58406 (syz-executor.7) thread 0xffff8000212807f8 (165816) exclusive rrwlock inode r = 0 (0xfffffd8070642d60) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1314 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8065c70a38) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10208 6411K 6420K 78643K 11350 0 pcb 13 10K 12K 78643K 15 0 rtable 246 7K 7K 78643K 1725 0 pf 29 8K 8K 78643K 71 0 ifaddr 44 15K 16K 78643K 134 0 ifgroup 50 2K 2K 78643K 134 0 sysctl 3 1K 3K 78643K 45 0 counters 60 35K 35K 78643K 102 0 ioctlops 0 0K 2K 78643K 69 0 iov 0 0K 28K 78643K 1111 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 3149 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 25K 78643K 159 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 2651 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 117K 78643K 16242 0 sigio 0 0K 0K 78643K 129 0 proc 56 78K 115K 78643K 1604 0 subproc 104 6K 6K 78643K 377 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 901 0 in_multi 99 7K 7K 78643K 547 0 ether_multi 1 0K 0K 78643K 28 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 187 837K 837K 78643K 187 0 exec 0 0K 1K 78643K 2741 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 474 99K 113K 78643K 157609 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 370 0 NDP 11 0K 2K 78643K 90 0 temp 74 5920K 6000K 78643K 46856 0 kqueue 12 18K 28K 78643K 2039 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 764 0 761 6 5 1 3 0 8 0 rtentry 112 364 0 248 4 0 4 4 0 8 0 unpcb 144 8893 0 8878 84 83 1 10 0 8 0 syncache 304 304 0 304 24 23 1 1 0 8 1 tcpqe 32 572 0 572 19 18 1 1 0 8 1 tcpcb 808 6204 0 6184 124 121 3 16 0 8 1 arp 120 65 0 46 1 0 1 1 0 8 0 ipq 40 36 0 35 11 10 1 1 0 8 0 ipqe 40 143 0 142 11 10 1 1 0 8 0 inpcb 368 11176 0 11152 138 135 3 14 0 8 0 nd6 136 104 0 75 3 1 2 2 0 8 0 kcovpl 48 29 0 21 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1457 0 978 32 2 30 32 0 8 0 art_table 32 1458 0 978 5 1 4 5 0 8 0 art_node 16 363 0 257 1 0 1 1 0 8 0 sysvmsgpl 40 46 0 21 1 0 1 1 0 8 0 semupl 112 10 0 10 1 1 0 1 0 8 0 semapl 112 2639 0 2629 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 22769 0 21318 92 0 92 92 0 8 0 ffsino 272 22769 0 21318 98 0 98 98 0 8 0 nchpl 144 44657 0 43013 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 142995 0 142995 7 6 1 2 0 8 1 percpumem 16 64 0 21 1 0 1 1 0 8 0 kstatmem 264 64 0 42 2 0 2 2 0 8 0 scxspl 216 331860 0 331859 68 62 6 8 1 8 5 plimitpl 152 1917 0 1894 20 19 1 2 0 8 0 sigapl 424 16496 0 16442 7 0 7 7 0 8 0 futexpl 64 131504 0 131498 5 4 1 1 0 8 0 knotepl 120 1290 0 0 25 5 20 25 0 8 0 kqueuepl 216 3255 0 3247 39 36 3 6 0 8 2 pipepl 320 2457 0 2429 64 58 6 8 0 8 3 fdescpl 496 16478 0 16443 7 2 5 6 0 8 0 filepl 152 90887 0 90646 125 111 14 19 0 8 4 lockfpl 104 2050 0 2048 1 0 1 1 0 8 0 lockfspl 48 613 0 611 1 0 1 1 0 8 0 sessionpl 144 44 0 28 1 0 1 1 0 8 0 pgrppl 48 358 0 342 1 0 1 1 0 8 0 ucredpl 104 11085 0 11067 1 0 1 1 0 8 0 zombiepl 144 16444 0 16442 1 0 1 1 0 8 0 processpl 1072 16496 0 16442 4 0 4 4 0 8 0 procpl 680 43579 0 43502 37 29 8 8 0 8 1 sosppl 168 1150 0 1148 13 12 1 2 0 8 0 sockpl 488 21171 0 21131 363 354 9 34 0 8 3 mcl64k 65536 33 0 0 4 1 3 3 0 8 0 mcl16k 16384 16 0 0 2 0 2 2 0 8 0 mcl12k 12288 24 0 0 2 0 2 2 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 34 0 0 4 2 2 3 0 8 0 mcl4k 4096 89 0 0 9 5 4 7 0 8 0 mcl2k2 2112 12 0 0 1 0 1 1 0 8 0 mcl2k 2048 691 0 0 35 19 16 33 0 8 0 mtagpl 96 17 0 0 1 0 1 1 0 8 0 mbufpl 256 2416 0 0 111 0 111 111 0 8 0 bufpl 288 119546 0 113215 453 0 453 453 0 8 0 anonpl 24 2017114 0 2006086 219 137 82 107 0 186 0 amapchunkpl 152 494322 0 493406 131 92 39 45 0 158 1 amappl16 200 61040 0 60768 225 208 17 37 0 8 0 amappl15 192 30 0 29 1 0 1 1 0 8 0 amappl14 184 226 0 211 2 1 1 2 0 8 0 amappl13 176 31 0 31 6 6 0 1 0 8 0 amappl12 168 17435 0 17395 2 0 2 2 0 8 0 amappl11 160 51 0 41 1 0 1 1 0 8 0 amappl10 152 63 0 44 1 0 1 1 0 8 0 amappl9 144 287 0 285 1 0 1 1 0 8 0 amappl8 136 852 0 677 7 0 7 7 0 8 0 amappl7 128 120 0 104 2 0 2 2 0 8 0 amappl6 120 488 0 463 2 1 1 2 0 8 0 amappl5 112 536 0 527 1 0 1 1 0 8 0 amappl4 104 987 0 936 3 0 3 3 0 8 0 amappl3 96 98007 0 97902 6 3 3 4 0 8 0 amappl2 88 17317 0 17242 3 1 2 3 0 8 0 amappl1 80 65766 0 65232 22 9 13 22 0 8 0 amappl 88 156388 0 156101 8 1 7 7 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 16478 0 16443 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 16478 0 16443 1 0 1 1 0 8 0 vmmpekpl 168 122225 0 122154 4 0 4 4 0 8 0 vmmpepl 168 972978 0 970461 308 187 121 137 0 357 4 vmsppl 464 16477 0 16443 7 2 5 6 0 8 0 rwobjpl 56 260528 0 253043 132 24 108 111 0 8 0 pdppl 4096 32964 0 32886 600 518 82 92 0 8 4 pvpl 32 5484889 0 5467446 510 349 161 364 0 265 0 pmappl 248 16477 0 16443 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1753 0 840 28 0 28 28 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82bffff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82cd6528) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cd6528) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002e44cfa0,ffff80000006bc00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff82cd6528) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cd6528) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002e44d170) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e44d170) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x84be13443c0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff82bffff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82cd6528) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cd6528) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002e44cfa0,ffff80000006bc00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff82cd6528) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cd6528) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002e44d170) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e44d170) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x84be13443c0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279eeb4) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82820513,ffffffff8283fa89,2bb,ffffffff827a57e4) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(adde91d9) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f1d4af8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f1d4af8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121a800,fffffd806f1d4af8,fffffd806f1d4b80,6,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a800,6) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a800) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a800,0,0,1) at exit1+0x3ff sys/kern/kern_exit.c:206 sys_exit(ffff80002121a800,ffff80002e401990,ffff80002e4019e0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e401a60) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e401a60) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73f9ddad0060, count: 2 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279eeb4) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82820513,ffffffff8283fa89,2bb,ffffffff827a57e4) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(adde91d9) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f1d4af8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f1d4af8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121a800,fffffd806f1d4af8,fffffd806f1d4b80,6,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a800,6) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a800) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a800,0,0,1) at exit1+0x3ff sys/kern/kern_exit.c:206 sys_exit(ffff80002121a800,ffff80002e401990,ffff80002e4019e0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e401a60) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e401a60) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73f9ddad0060, count: -13