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 491954 56156 32767 0x10 0 0 syz-executor.2 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a57c9) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828214f5,ffffffff8283f7c6,2bb,ffffffff827a5364) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(914c6fac) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f206bd0) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f206bd0) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121b808,fffffd806f206bd0,fffffd806f206c58,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121b808,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121b808) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121b808,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121b808,ffff8000212d1c80,ffff8000212d1cd0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212d1d50) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212d1d50) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e27f69e4df0, 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(ffffffff827a57c9) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828214f5,ffffffff8283f7c6,2bb,ffffffff827a5364) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(914c6fac) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f206bd0) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f206bd0) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121b808,fffffd806f206bd0,fffffd806f206c58,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121b808,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121b808) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121b808,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121b808,ffff8000212d1c80,ffff8000212d1cd0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212d1d50) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212d1d50) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e27f69e4df0, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000212d18c0 rbx 0xffff800020d59b9f rdx 0 rcx 0xffff80002121b808 rax 0xffff800020d58ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe3fd11cea9c32ba7 r11 0xb736c02302bad7c0 r12 0xffff800020d599a0 r13 0 r14 0 r15 0x1 rip 0xffffffff814d940c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000212d18b0 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.5) pid=212054 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff80002121a2c8,0xffff80002121a828 process=0xffff80002121c870 user=0xffff8000212cc000, vmspace=0xfffffd8069d28b00 estcpu=33, cpticks=3, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 42995 6143 84927 32767 2 0x10 syz-executor.1 42995 425560 84927 32767 2 0x4000010 syz-executor.1 84469 223000 59711 32767 2 0x10 syz-executor.4 84469 257941 59711 32767 2 0x4000010 syz-executor.4 58753 519789 53895 32767 2 0x10 syz-executor.7 58753 430025 53895 32767 3 0x4000090 fsleep syz-executor.7 92766 140461 62776 32767 2 0x10 syz-executor.6 92766 273673 62776 32767 3 0x4000090 fsleep syz-executor.6 92766 266201 62776 32767 3 0x4000090 fsleep syz-executor.6 92766 213349 62776 32767 3 0x4000090 fsleep syz-executor.6 89097 52969 56156 32767 2 0x10 syz-executor.2 89097 257865 56156 32767 3 0x4000090 fsleep syz-executor.2 89097 477629 56156 32767 2 0x4000010 syz-executor.2 89097 389040 56156 32767 2 0x4000010 syz-executor.2 58337 243709 69225 32767 2 0x10 syz-executor.0 58337 300431 69225 32767 2 0x4000010 syz-executor.0 35741 376771 89904 32767 2 0x490 syz-executor.3 89904 517786 13550 0 3 0x82 wait syz-executor.3 62776 409117 67623 32767 3 0x90 nanoslp syz-executor.6 67623 358797 13550 0 3 0x82 wait syz-executor.6 69225 196483 10981 32767 3 0x90 nanoslp syz-executor.0 10981 54632 13550 0 3 0x82 wait syz-executor.0 59711 228068 98441 32767 3 0x90 nanoslp syz-executor.4 98441 155836 13550 0 3 0x82 wait syz-executor.4 84927 261298 43474 32767 3 0x90 nanoslp syz-executor.1 43474 61258 13550 0 3 0x82 wait syz-executor.1 56156 491954 32361 32767 7 0x10 syz-executor.2 32361 433455 13550 0 3 0x82 wait syz-executor.2 40316 139692 46574 32767 2 0x490 syz-executor.5 46574 293931 13550 0 3 0x82 wait syz-executor.5 99593 250065 0 0 3 0x14200 bored sosplice 53895 245934 87990 32767 2 0x490 syz-executor.7 87990 401050 13550 0 3 0x82 wait syz-executor.7 13550 275447 93014 0 3 0x2000082 wait syz-fuzzer 13550 161120 93014 0 2 0x6000082 syz-fuzzer 13550 485933 93014 0 3 0x6000082 wait syz-fuzzer 13550 264690 93014 0 3 0x6000082 wait syz-fuzzer 13550 47352 93014 0 2 0x6000082 syz-fuzzer 13550 281829 93014 0 3 0x6000082 kqread syz-fuzzer 13550 523907 93014 0 3 0x6000082 wait syz-fuzzer 13550 307082 93014 0 3 0x6000082 thrsleep syz-fuzzer 13550 259523 93014 0 3 0x6000082 thrsleep syz-fuzzer 13550 518691 93014 0 3 0x6000082 wait syz-fuzzer 13550 117423 93014 0 3 0x6000082 thrsleep syz-fuzzer 13550 381976 93014 0 3 0x6000082 wait syz-fuzzer 13550 362068 93014 0 3 0x6000082 wait syz-fuzzer 13550 384057 93014 0 3 0x6000082 thrsleep syz-fuzzer 13550 414061 93014 0 3 0x6000082 thrsleep syz-fuzzer 13550 60320 93014 0 3 0x6000082 wait syz-fuzzer 93014 205549 17073 0 3 0x10008a sigsusp ksh 17073 330059 92814 0 3 0x9a kqread sshd 29536 183923 1 0 3 0x100083 ttyin getty 92814 44864 1 0 3 0x88 kqread sshd 50362 437620 10585 73 3 0x1100090 kqread syslogd 10585 248008 1 0 3 0x100082 netio syslogd 98720 222424 1 0 3 0x100080 kqread resolvd 35195 236046 64593 77 3 0x100092 kqread dhcpleased 81560 373295 64593 77 3 0x100092 kqread dhcpleased 64593 82113 1 0 3 0x80 kqread dhcpleased 93217 241933 0 0 3 0x14200 bored smr 76603 386184 0 0 2 0x14200 zerothread 90617 36318 0 0 3 0x14200 aiodoned aiodoned 63443 28290 0 0 3 0x14200 syncer update 7304 185288 0 0 3 0x14200 cleaner cleaner 32610 451725 0 0 2 0x14200 reaper 7555 119371 0 0 3 0x14200 pgdaemon pagedaemon 66783 33490 0 0 3 0x14200 bored viomb 20236 186871 0 0 3 0x40014200 acpi0 acpi0 54868 368086 0 0 3 0x40014200 idle1 39178 421521 0 0 3 0x14200 bored softnet3 22331 358726 0 0 3 0x14200 bored softnet2 94683 110619 0 0 3 0x14200 bored softnet1 27508 284213 0 0 3 0x14200 bored softnet0 95467 519447 0 0 3 0x14200 bored systqmp 19168 326070 0 0 3 0x14200 bored systq 36796 145055 0 0 3 0x40014200 bored softclock 96934 448727 0 0 3 0x40014200 idle0 1 37923 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10203 6411K 6420K 78643K 11381 0 pcb 13 16K 20K 78643K 19 0 rtable 238 6K 7K 78643K 2480 0 pf 29 8K 8K 78643K 95 0 ifaddr 44 15K 16K 78643K 182 0 ifgroup 50 2K 2K 78643K 182 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 126 0 ioctlops 0 0K 2K 78643K 266 0 iov 0 0K 48K 78643K 2046 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 5934 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 374 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 5241 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 25 93K 121K 78643K 26995 0 sigio 0 0K 0K 78643K 4829 0 proc 56 78K 115K 78643K 2777 0 subproc 104 6K 6K 78643K 533 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1824 0 in_multi 99 7K 7K 78643K 690 0 ether_multi 1 0K 0K 78643K 29 0 mrt 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 157 705K 705K 78643K 157 0 exec 0 0K 1K 78643K 4231 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 495 95K 108K 78643K 267754 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 668 0 NDP 11 0K 2K 78643K 126 0 temp 74 5920K 6044K 78643K 67484 0 kqueue 12 18K 29K 78643K 2176 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 1413 0 1410 21 20 1 3 0 8 0 rtentry 112 499 0 387 4 0 4 4 0 8 0 unpcb 144 20364 0 20351 228 222 6 10 0 8 5 syncache 304 335 0 335 54 53 1 1 0 8 1 tcpqe 32 473 0 473 54 53 1 1 0 8 1 tcpcb 808 9429 0 9407 291 285 6 17 0 8 0 arp 120 88 0 70 1 0 1 1 0 8 0 ipq 40 121 0 121 17 17 0 1 0 8 0 ipqe 40 579 0 579 18 18 0 2 0 8 0 inpcb 368 72509 0 72416 769 760 9 29 0 8 0 nd6 136 144 0 118 3 2 1 2 0 8 0 kcovpl 48 41 0 33 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1968 0 1506 32 3 29 30 0 8 0 art_table 32 1969 0 1506 4 0 4 4 0 8 0 art_node 16 498 0 396 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semapl 112 5239 0 5229 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 35746 0 34264 94 0 94 94 0 8 0 ffsino 272 35746 0 34264 100 0 100 100 0 8 0 nchpl 144 69813 0 68167 63 0 63 63 0 8 0 uvmvnodes 80 6118 0 0 125 0 125 125 0 8 0 vnodes 216 6118 0 0 340 0 340 340 0 8 0 namei 1024 221283 0 221283 10 9 1 2 0 8 1 percpumem 16 76 0 33 1 0 1 1 0 8 0 kstatmem 264 88 0 66 2 0 2 2 0 8 0 scxspl 216 235574 0 235574 96 92 4 8 1 8 4 plimitpl 152 5204 0 5180 44 43 1 2 0 8 0 sigapl 424 27224 0 27169 8 1 7 7 0 8 0 futexpl 64 236481 0 236476 10 9 1 1 0 8 0 knotepl 120 1740 0 0 18 2 16 17 0 8 0 kqueuepl 216 5513 0 5505 87 86 1 8 0 8 0 pipepl 320 5577 0 5548 149 141 8 11 0 8 5 fdescpl 496 27206 0 27170 7 1 6 6 0 8 0 filepl 152 203314 0 203007 404 387 17 24 0 8 5 lockfpl 104 4758 0 4755 4 3 1 2 0 8 0 lockfspl 48 1128 0 1125 1 0 1 1 0 8 0 sessionpl 144 56 0 40 1 0 1 1 0 8 0 pgrppl 48 524 0 508 1 0 1 1 0 8 0 ucredpl 104 25794 0 25776 1 0 1 1 0 8 0 zombiepl 144 27171 0 27169 1 0 1 1 0 8 0 processpl 1072 27224 0 27169 5 1 4 5 0 8 0 procpl 680 76492 0 76411 57 49 8 9 0 8 1 sosppl 168 372 0 372 33 32 1 1 0 8 1 sockpl 488 95503 0 95394 1801 1779 22 42 0 8 8 mcl64k 65536 42 0 0 5 2 3 3 0 8 0 mcl16k 16384 44 0 0 5 2 3 3 0 8 0 mcl12k 12288 49 0 0 2 0 2 2 0 8 0 mcl9k 9216 34 0 0 2 0 2 2 0 8 0 mcl8k 8192 50 0 0 5 2 3 3 0 8 0 mcl4k 4096 100 0 0 6 2 4 4 0 8 0 mcl2k2 2112 14 0 0 1 0 1 1 0 8 0 mcl2k 2048 672 0 0 43 33 10 43 0 8 0 mtagpl 96 12 0 0 1 0 1 1 0 8 0 mbufpl 256 2762 0 0 121 1 120 121 0 8 0 bufpl 288 52786 0 46455 453 0 453 453 0 8 0 anonpl 24 2623720 0 2611803 320 219 101 122 0 186 1 amapchunkpl 152 848587 0 847596 182 134 48 51 0 158 8 amappl16 200 54494 0 54201 358 333 25 35 0 8 8 amappl15 192 78 0 78 2 2 0 1 0 8 0 amappl14 184 251 0 236 2 1 1 2 0 8 0 amappl13 176 63 0 62 1 0 1 1 0 8 0 amappl12 168 28334 0 28296 2 0 2 2 0 8 0 amappl11 160 56 0 45 1 0 1 1 0 8 0 amappl10 152 64 0 52 1 0 1 1 0 8 0 amappl9 144 455 0 455 62 61 1 1 0 8 1 amappl8 136 1512 0 1293 8 0 8 8 0 8 0 amappl7 128 366 0 349 2 0 2 2 0 8 0 amappl6 120 741 0 714 2 1 1 2 0 8 0 amappl5 112 876 0 868 1 0 1 1 0 8 0 amappl4 104 1341 0 1293 2 0 2 2 0 8 0 amappl3 96 166027 0 165912 32 29 3 4 0 8 0 amappl2 88 28627 0 28543 3 1 2 3 0 8 0 amappl1 80 103914 0 103385 22 10 12 22 0 8 0 amappl 88 266104 0 265822 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 27206 0 27170 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 27206 0 27170 1 0 1 1 0 8 0 vmmpekpl 168 209239 0 209183 4 0 4 4 0 8 0 vmmpepl 168 1567303 0 1564688 439 316 123 139 0 357 1 vmsppl 464 27205 0 27170 7 2 5 6 0 8 0 rwobjpl 56 387327 0 379567 142 29 113 113 0 8 3 pdppl 4096 54419 0 54340 914 833 81 95 0 8 2 pvpl 32 7721900 0 7703227 849 641 208 358 0 265 29 pmappl 248 27205 0 27170 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2912 0 1983 28 0 28 28 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82c39ff0) 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(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff82c85668) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x12e sys/kern/kern_lock.c:147 syscall(ffff800027b49840) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027b49840) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e3795ed8f00, count: 6 ddb{0}> trace x86_ipi_db(ffffffff82c39ff0) 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(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff82c85668) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x12e sys/kern/kern_lock.c:147 syscall(ffff800027b49840) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027b49840) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e3795ed8f00, 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(ffffffff827a57c9) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828214f5,ffffffff8283f7c6,2bb,ffffffff827a5364) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(914c6fac) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f206bd0) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f206bd0) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121b808,fffffd806f206bd0,fffffd806f206c58,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121b808,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121b808) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121b808,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121b808,ffff8000212d1c80,ffff8000212d1cd0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212d1d50) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212d1d50) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e27f69e4df0, count: 2 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a57c9) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828214f5,ffffffff8283f7c6,2bb,ffffffff827a5364) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(914c6fac) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f206bd0) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f206bd0) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121b808,fffffd806f206bd0,fffffd806f206c58,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121b808,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121b808) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121b808,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121b808,ffff8000212d1c80,ffff8000212d1cd0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212d1d50) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212d1d50) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e27f69e4df0, count: -13