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 523458 40496 32767 0x10 0 0 syz-executor.3 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279f709) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281d9e3,ffffffff8283c03e,2bb,ffffffff827a18af) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(c49433fb) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f208000) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f208000) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121b010,fffffd806f208000,fffffd806f208088,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121b010,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121b010) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121b010,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121b010,ffff80002472d430,ffff80002472d480) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002472d500) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002472d500) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c1a35753250, 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(ffffffff8279f709) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281d9e3,ffffffff8283c03e,2bb,ffffffff827a18af) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(c49433fb) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f208000) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f208000) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121b010,fffffd806f208000,fffffd806f208088,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121b010,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121b010) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121b010,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121b010,ffff80002472d430,ffff80002472d480) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002472d500) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002472d500) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c1a35753250, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002472d070 rbx 0xffff800020d59b9f rdx 0 rcx 0xffff80002121b010 rax 0xffff800020d58ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc3f6d333d9d09f4d r11 0x123c4bf1832e5ad r12 0xffff800020d599a0 r13 0 r14 0 r15 0x1 rip 0xffffffff81b3671c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002472d060 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.2) pid=500599 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff8000211f4ab8,0xffff80002121a2d8 process=0xffff8000ffff4878 user=0xffff800024728000, vmspace=0xfffffd806a0273c0 estcpu=31, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65410 103444 34263 32767 2 0x10 syz-executor.5 65410 255433 34263 32767 3 0x4000090 kqpoll syz-executor.5 40496 523458 72324 32767 7 0x10 syz-executor.3 40496 501215 72324 32767 3 0x4000090 fsleep syz-executor.3 5691 409124 73874 32767 2 0x10 syz-executor.4 4515 87956 66777 32767 2 0x10 syz-executor.6 4515 260679 66777 32767 2 0x4000010 syz-executor.6 2593 243204 97260 32767 2 0x10 syz-executor.7 2593 431833 97260 32767 3 0x4000090 fsleep syz-executor.7 14859 298953 68720 32767 3 0x90 nanoslp syz-executor.2 68720 413276 20175 0 3 0x82 wait syz-executor.2 67321 464161 119 32767 2 0x10 syz-executor.1 119 480106 20175 0 3 0x82 wait syz-executor.1 34263 330390 88329 32767 3 0x90 nanoslp syz-executor.5 88329 71717 20175 0 3 0x82 wait syz-executor.5 66777 338751 9801 32767 3 0x90 nanoslp syz-executor.6 9801 286224 20175 0 3 0x82 wait syz-executor.6 73874 201004 85913 32767 3 0x90 nanoslp syz-executor.4 85913 359106 20175 0 3 0x82 wait syz-executor.4 72324 123310 60195 32767 3 0x90 nanoslp syz-executor.3 60195 368002 20175 0 3 0x82 wait syz-executor.3 65618 461150 79447 32767 3 0x10 biowait syz-executor.0 79447 423122 20175 0 3 0x82 wait syz-executor.0 97260 266734 6075 32767 3 0x90 nanoslp syz-executor.7 6075 439950 20175 0 3 0x82 wait syz-executor.7 49911 462716 0 0 3 0x14200 bored sosplice 20175 53049 26884 0 3 0x2000082 wait syz-fuzzer 20175 224896 26884 0 3 0x6000082 nanoslp syz-fuzzer 20175 522090 26884 0 3 0x6000082 thrsleep syz-fuzzer 20175 244285 26884 0 3 0x6000082 wait syz-fuzzer 20175 59695 26884 0 3 0x6000082 wait syz-fuzzer 20175 225740 26884 0 3 0x6000082 thrsleep syz-fuzzer 20175 170196 26884 0 3 0x6000082 wait syz-fuzzer 20175 45215 26884 0 3 0x6000082 wait syz-fuzzer 20175 240984 26884 0 3 0x6000082 thrsleep syz-fuzzer 20175 166891 26884 0 3 0x6000082 thrsleep syz-fuzzer 20175 440152 26884 0 3 0x6000082 wait syz-fuzzer 20175 446693 26884 0 3 0x6000082 wait syz-fuzzer 20175 21774 26884 0 3 0x6000082 thrsleep syz-fuzzer 20175 437280 26884 0 3 0x6000082 kqread syz-fuzzer 20175 216732 26884 0 3 0x6000082 thrsleep syz-fuzzer 20175 338941 26884 0 3 0x6000082 wait syz-fuzzer 26884 404294 3650 0 3 0x10008a sigsusp ksh 3650 487304 37913 0 3 0x9a kqread sshd 99512 204517 1 0 3 0x100083 ttyin getty 37913 1190 1 0 3 0x88 kqread sshd 15302 83571 96641 73 3 0x1100090 kqread syslogd 96641 507005 1 0 3 0x100082 netio syslogd 99560 488997 1 0 3 0x100080 kqread resolvd 98853 38144 21313 77 3 0x100092 kqread dhcpleased 9138 34991 21313 77 3 0x100092 kqread dhcpleased 21313 301733 1 0 3 0x80 kqread dhcpleased 21627 232924 0 0 3 0x14200 bored smr 14683 85274 0 0 2 0x14200 zerothread 55051 452077 0 0 3 0x14200 aiodoned aiodoned 1043 74634 0 0 3 0x14200 syncer update 1819 142119 0 0 3 0x14200 cleaner cleaner 26201 406058 0 0 2 0x14200 reaper 11974 243618 0 0 3 0x14200 pgdaemon pagedaemon 79066 465776 0 0 3 0x14200 bored viomb 81808 13995 0 0 3 0x40014200 acpi0 acpi0 89901 442034 0 0 3 0x40014200 idle1 57956 360608 0 0 3 0x14200 bored softnet3 30309 460659 0 0 3 0x14200 bored softnet2 86814 252681 0 0 3 0x14200 bored softnet1 34996 461847 0 0 3 0x14200 bored softnet0 63073 83681 0 0 3 0x14200 bored systqmp 59775 320563 0 0 3 0x14200 bored systq 86534 444498 0 0 3 0x40014200 bored softclock 44562 313 0 0 3 0x40014200 idle0 1 82308 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 (0xffffffff82d40ab0) #0 witness_lock+0x447 #1 sched_idle+0x199 sys/kern/kern_sched.c:172 #2 proc_trampoline+0x1c Process 65618 (syz-executor.0) thread 0xffff80002121ad68 (461150) exclusive rrwlock inode r = 0 (0xfffffd806e6a32c8) #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 (0xfffffd806599eb40) #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 10216 6413K 6420K 78643K 11557 0 pcb 13 16K 20K 78643K 19 0 rtable 242 6K 7K 78643K 4583 0 pf 29 8K 8K 78643K 203 0 ifaddr 44 16K 16K 78643K 400 0 ifgroup 50 2K 2K 78643K 398 0 sysctl 3 1K 3K 78643K 10 0 counters 60 35K 35K 78643K 234 0 ioctlops 0 0K 2K 78643K 369 0 iov 0 0K 32K 78643K 4845 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 9275 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 13K 78643K 827 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 9096 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 121K 78643K 46072 0 sigio 0 0K 0K 78643K 1145 0 proc 56 78K 103K 78643K 5264 0 subproc 104 6K 6K 78643K 1235 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 9292 0 in_multi 99 7K 7K 78643K 1376 0 ether_multi 1 0K 0K 78643K 35 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 235 1049K 1049K 78643K 235 0 exec 0 0K 1K 78643K 9289 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 505 94K 119K 78643K 454340 0 UVM aobj 131 4K 4K 78643K 135 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1269 0 NDP 11 0K 2K 78643K 288 0 temp 74 5920K 6048K 78643K 114960 0 kqueue 12 18K 36K 78643K 4422 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 1980 0 1977 25 24 1 3 0 8 0 rtentry 112 1130 0 1016 4 0 4 4 0 8 0 unpcb 144 113960 0 113945 493 484 9 13 0 8 8 syncache 304 617 0 617 85 84 1 1 0 8 1 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 648 0 648 72 71 1 1 0 8 1 tcpcb 808 33676 0 33639 478 467 11 20 0 8 6 arp 120 201 0 182 1 0 1 1 0 8 0 ipq 40 71 0 69 25 24 1 1 0 8 0 ipqe 40 535 0 533 25 24 1 1 0 8 0 inpcb 368 48254 0 48212 474 464 10 21 0 8 5 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 136 338 0 311 6 4 2 2 0 8 0 kcovpl 48 95 0 87 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 4580 0 4108 45 15 30 31 0 8 0 art_table 32 4581 0 4108 4 0 4 4 0 8 0 art_node 16 1129 0 1025 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 10 2 2 0 1 0 8 0 semapl 112 9094 0 9084 1 0 1 1 0 8 0 shmpl 112 132 0 4 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 59895 0 58417 93 0 93 93 0 8 0 ffsino 272 59895 0 58417 99 0 99 99 0 8 0 nchpl 144 119391 0 117743 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 388192 0 388192 8 7 1 2 0 8 1 percpumem 16 130 0 87 1 0 1 1 0 8 0 kstatmem 264 196 0 174 2 0 2 2 0 8 0 scxspl 216 376500 0 376499 119 116 3 8 1 8 2 plimitpl 152 6683 0 6660 64 62 2 2 0 8 1 sigapl 424 46192 0 46139 10 3 7 7 0 8 0 futexpl 64 384464 0 384462 10 9 1 1 0 8 0 knotepl 120 2407 0 0 20 3 17 18 0 8 0 kqueuepl 216 11959 0 11950 219 214 5 8 0 8 4 pipepl 320 11897 0 11869 281 278 3 13 0 8 0 fdescpl 496 46174 0 46139 7 2 5 6 0 8 0 filepl 152 364554 0 364314 594 576 18 24 0 8 7 lockfpl 104 10154 0 10152 3 2 1 2 0 8 0 lockfspl 48 3451 0 3449 1 0 1 1 0 8 0 sessionpl 144 110 0 94 1 0 1 1 0 8 0 pgrppl 48 689 0 673 1 0 1 1 0 8 0 ucredpl 104 41994 0 41976 1 0 1 1 0 8 0 zombiepl 144 46140 0 46139 1 0 1 1 0 8 0 processpl 1072 46192 0 46139 5 1 4 5 0 8 0 procpl 680 129251 0 129178 84 76 8 8 0 8 1 sosppl 168 763 0 763 40 40 0 1 0 8 0 sockpl 488 166187 0 166124 2590 2570 20 52 0 8 8 mcl64k 65536 72 0 0 4 2 2 3 0 8 0 mcl16k 16384 49 0 0 5 2 3 3 0 8 0 mcl12k 12288 49 0 0 2 0 2 2 0 8 0 mcl9k 9216 40 0 0 3 1 2 2 0 8 0 mcl8k 8192 73 0 0 6 3 3 4 0 8 0 mcl4k 4096 129 0 0 4 0 4 4 0 8 0 mcl2k2 2112 31 0 0 2 0 2 2 0 8 0 mcl2k 2048 773 0 0 39 26 13 33 0 8 0 mtagpl 96 25 0 0 1 0 1 1 0 8 0 mbufpl 256 3083 0 0 108 0 108 108 0 8 0 bufpl 288 76512 0 70187 454 1 453 453 0 8 0 anonpl 24 4413850 0 4402161 352 251 101 121 0 186 0 amapchunkpl 152 1439739 0 1438861 376 338 38 57 0 158 0 amappl16 200 91833 0 91555 593 576 17 41 0 8 0 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 482 0 463 12 10 2 2 0 8 0 amappl13 176 25 0 25 8 8 0 1 0 8 0 amappl12 168 48156 0 48118 2 0 2 2 0 8 0 amappl11 160 49 0 39 1 0 1 1 0 8 0 amappl10 152 180 0 166 1 0 1 1 0 8 0 amappl9 144 518 0 518 86 85 1 1 0 8 1 amappl8 136 2446 0 2151 12 1 11 11 0 8 0 amappl7 128 306 0 289 2 1 1 2 0 8 0 amappl6 120 1214 0 1187 2 1 1 2 0 8 0 amappl5 112 1508 0 1498 1 0 1 1 0 8 0 amappl4 104 2066 0 2017 2 0 2 2 0 8 0 amappl3 96 280154 0 280057 16 13 3 4 0 8 0 amappl2 88 48267 0 48180 15 12 3 3 0 8 1 amappl1 80 173333 0 172801 22 9 13 22 0 8 0 amappl 88 451189 0 450933 7 0 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 72 134 0 4 3 0 3 3 0 8 0 uaddrrnd 24 46174 0 46139 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 46174 0 46139 1 0 1 1 0 8 0 vmmpekpl 168 375371 0 375321 3 0 3 3 0 8 0 vmmpepl 168 2678874 0 2676268 446 310 136 144 0 357 0 vmsppl 464 46173 0 46139 7 2 5 6 0 8 0 rwobjpl 56 647328 0 639713 135 23 112 115 0 8 0 pdppl 4096 92356 0 92278 1359 1277 82 94 0 8 4 pvpl 32 13176508 0 13157998 1111 935 176 362 0 265 0 pmappl 248 46173 0 46139 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3267 0 2342 27 0 27 27 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82bbdff0) 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(ffffffff82d841f0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d841f0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800024707780,ffff80000027b600) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f __mp_lock(ffffffff82d841f0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d841f0) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff8000247078d0,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff82d841f0) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d841f0) at __mp_lock+0x12e sys/kern/kern_lock.c:147 uvm_fault(fffffd806a0271f0,8f264df6000,0,1) at uvm_fault+0x181 sys/uvm/uvm_fault.c:622 upageflttrap(ffff800024707c50,8f264df6000) at upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800024707c50) at usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7452ca913a30, count: 1 ddb{0}> trace x86_ipi_db(ffffffff82bbdff0) 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(ffffffff82d841f0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d841f0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800024707780,ffff80000027b600) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f __mp_lock(ffffffff82d841f0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d841f0) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff8000247078d0,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff82d841f0) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d841f0) at __mp_lock+0x12e sys/kern/kern_lock.c:147 uvm_fault(fffffd806a0271f0,8f264df6000,0,1) at uvm_fault+0x181 sys/uvm/uvm_fault.c:622 upageflttrap(ffff800024707c50,8f264df6000) at upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800024707c50) at usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7452ca913a30, count: -14 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(ffffffff8279f709) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281d9e3,ffffffff8283c03e,2bb,ffffffff827a18af) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(c49433fb) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f208000) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f208000) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121b010,fffffd806f208000,fffffd806f208088,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121b010,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121b010) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121b010,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121b010,ffff80002472d430,ffff80002472d480) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002472d500) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002472d500) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c1a35753250, count: 2 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279f709) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281d9e3,ffffffff8283c03e,2bb,ffffffff827a18af) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(c49433fb) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f208000) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f208000) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121b010,fffffd806f208000,fffffd806f208088,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121b010,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121b010) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121b010,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121b010,ffff80002472d430,ffff80002472d480) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002472d500) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002472d500) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c1a35753250, count: -13