panic: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/multicore/kernel/sys/arch/amd64/amd64/intr.c", line 699 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 299394 48494 0 0x2 0 0 syz-executor.5 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279c1e8) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281ee27,ffffffff827ac25b,2bb,ffffffff827a3e4a) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(e65811e0) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f0615e8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f0615e8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121bd38,fffffd806f0615e8,fffffd806f061670,0,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121bd38,0) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121bd38) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121bd38,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121bd38,ffff800024b7b610,ffff800024b7b660) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800024b7b6e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800024b7b6e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x758156f91de0, 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/multicore/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(ffffffff8279c1e8) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281ee27,ffffffff827ac25b,2bb,ffffffff827a3e4a) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(e65811e0) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f0615e8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f0615e8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121bd38,fffffd806f0615e8,fffffd806f061670,0,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121bd38,0) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121bd38) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121bd38,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121bd38,ffff800024b7b610,ffff800024b7b660) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800024b7b6e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800024b7b6e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x758156f91de0, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800024b7b250 rbx 0xffff800020d59b9f rdx 0 rcx 0xffff80002121bd38 rax 0xffff800020d58ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc14695b9811b163c r11 0xc626bbc0b5a8a213 r12 0xffff800020d599a0 r13 0 r14 0 r15 0x1 rip 0xffffffff81244a2c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800024b7b240 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.2) pid=74262 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff80002121b540,0xffff8000212b2d68 process=0xffff8000ffff4880 user=0xffff800024b76000, vmspace=0xfffffd806efca578 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55404 114210 68450 0 2 0 syz-executor.3 81068 347752 46342 0 2 0 syz-executor.0 9331 435142 32745 0 2 0 syz-executor.7 32160 295866 0 0 3 0x14280 nfsidl nfsio 19884 420686 0 0 3 0x14280 nfsidl nfsio 22481 489607 0 0 3 0x14280 nfsidl nfsio 70526 27851 0 0 3 0x14280 nfsidl nfsio 3130 2431 0 0 3 0x14280 nfsidl nfsio 54666 254093 0 0 3 0x14280 nfsidl nfsio 97324 98551 0 0 3 0x14280 nfsidl nfsio 15523 15631 0 0 3 0x14280 nfsidl nfsio 57497 380097 0 0 3 0x14280 nfsidl nfsio 66476 188310 0 0 3 0x14280 nfsidl nfsio 24169 195769 0 0 3 0x14280 nfsidl nfsio 14440 371491 0 0 3 0x14280 nfsidl nfsio 92876 156170 0 0 3 0x14280 nfsidl nfsio 46851 87118 0 0 3 0x14280 nfsidl nfsio 96748 223790 0 0 3 0x14280 nfsidl nfsio 34108 273261 0 0 3 0x14280 nfsidl nfsio 69143 58320 0 0 3 0x14280 nfsidl nfsio 79248 380703 0 0 3 0x14280 nfsidl nfsio 18813 369955 0 0 3 0x14280 nfsidl nfsio 33232 497339 0 0 3 0x14280 nfsidl nfsio 75831 33844 39868 0 2 0x482 syz-executor.2 48494 299394 39868 0 7 0x2 syz-executor.5 46342 230709 39868 0 3 0x82 nanoslp syz-executor.0 11478 239653 39868 0 2 0x2 syz-executor.6 68450 8529 39868 0 2 0x2 syz-executor.3 65981 489641 39868 0 2 0x2 syz-executor.1 57265 37677 39868 0 2 0x482 syz-executor.4 32745 80164 39868 0 3 0x82 nanoslp syz-executor.7 67440 488539 1 0 3 0x100083 ttyin getty 11437 442536 0 0 2 0x14200 sosplice 39868 286490 70611 0 3 0x2000082 wait syz-fuzzer 39868 15843 70611 0 3 0x6000082 nanoslp syz-fuzzer 39868 362520 70611 0 3 0x6000082 kqread syz-fuzzer 39868 121119 70611 0 3 0x6000082 wait syz-fuzzer 39868 274978 70611 0 3 0x6000082 wait syz-fuzzer 39868 478326 70611 0 3 0x6000082 thrsleep syz-fuzzer 39868 351877 70611 0 3 0x6000082 wait syz-fuzzer 39868 515693 70611 0 3 0x6000082 thrsleep syz-fuzzer 39868 89302 70611 0 3 0x6000082 thrsleep syz-fuzzer 39868 274881 70611 0 3 0x6000082 wait syz-fuzzer 39868 275946 70611 0 3 0x6000082 thrsleep syz-fuzzer 39868 47745 70611 0 3 0x6000082 thrsleep syz-fuzzer 39868 413561 70611 0 3 0x6000082 wait syz-fuzzer 39868 204012 70611 0 3 0x6000082 wait syz-fuzzer 39868 504138 70611 0 3 0x6000082 wait syz-fuzzer 39868 241691 70611 0 3 0x6000082 thrsleep syz-fuzzer 70611 27748 18997 0 3 0x10008a sigsusp ksh 18997 273303 73154 0 3 0x9a kqread sshd 73154 286316 1 0 3 0x88 kqread sshd 87243 262102 36411 74 3 0x1100092 bpf pflogd 36411 80586 1 0 3 0x80 netio pflogd 73416 428761 75938 73 3 0x1100090 kqread syslogd 75938 74319 1 0 3 0x100082 netio syslogd 59504 413517 1 0 3 0x100080 kqread resolvd 79820 480609 17363 77 3 0x100092 kqread dhcpleased 66588 206639 17363 77 3 0x100092 kqread dhcpleased 17363 472665 1 0 3 0x80 kqread dhcpleased 2202 304601 0 0 3 0x14200 bored smr 12558 31277 0 0 2 0x14200 zerothread 79315 154404 0 0 3 0x14200 aiodoned aiodoned 76225 355239 0 0 3 0x14200 syncer update 19711 456245 0 0 3 0x14200 cleaner cleaner 94694 451124 0 0 2 0x14200 reaper 15889 517473 0 0 3 0x14200 pgdaemon pagedaemon 64110 78820 0 0 3 0x14200 bored viomb 39045 306187 0 0 3 0x40014200 acpi0 acpi0 21412 368751 0 0 3 0x40014200 idle1 47210 411006 0 0 3 0x14200 bored softnet3 40053 360445 0 0 3 0x14200 bored softnet2 56998 178727 0 0 3 0x14200 bored softnet1 41290 428360 0 0 3 0x14200 bored softnet0 13544 522724 0 0 3 0x14200 bored systqmp 77844 29547 0 0 3 0x14200 bored systq 21566 17481 0 0 3 0x40014200 bored softclock 4727 202620 0 0 3 0x40014200 idle0 1 285427 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 11437 (sosplice) thread 0xffff8000212b3550 (442536) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10236 6503K 7616K 78643K 39379 0 pcb 13 18K 21K 78643K 883 0 rtable 247 7K 8K 78643K 1352 0 pf 32 9K 10K 78643K 171 0 ifaddr 45 16K 17K 78643K 164 0 ifgroup 55 2K 2K 78643K 245 0 sysctl 2 0K 0K 78643K 6 0 counters 60 35K 36K 78643K 180 0 ioctlops 0 0K 4K 78643K 1761 0 iov 0 0K 24K 78643K 732 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1494 93K 94K 78643K 16789 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 142 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1871 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 93K 78643K 15196 0 sigio 0 0K 0K 78643K 366 0 proc 70 91K 115K 78643K 1586 0 subproc 104 6K 7K 78643K 338 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 889 0 in_multi 99 7K 7K 78643K 352 0 ether_multi 1 0K 0K 78643K 14 0 mrt 1 0K 0K 78643K 11 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 289 1288K 1288K 78643K 289 0 exec 0 0K 1K 78643K 1675 0 pfkey data 0 0K 0K 78643K 35 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 456 106K 135K 78643K 149228 0 UVM aobj 131 4K 4K 78643K 144 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 368 0 NDP 12 0K 0K 78643K 122 0 temp 74 5920K 6000K 78643K 132443 0 kqueue 12 18K 42K 78643K 3471 0 SYN cache 2 16K 24K 78643K 3 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 120 360 0 357 4 3 1 3 0 8 0 rtentry 112 343 0 228 4 0 4 4 0 8 0 unpcb 144 6113 0 6098 65 64 1 10 0 8 0 syncache 304 112 0 112 23 22 1 1 0 8 1 tcpqe 32 221 0 221 16 16 0 1 0 8 0 tcpcb 808 3083 0 3027 101 92 9 16 0 8 3 arp 120 54 0 35 1 0 1 1 0 8 0 ipq 40 3 0 3 1 1 0 1 0 8 0 ipqe 40 9 0 9 1 1 0 1 0 8 0 inpcb 368 9273 0 9212 150 141 9 21 0 8 3 nd6 136 104 0 76 2 0 2 2 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 26 0 18 1 0 1 1 0 8 0 ppxss 1256 29 0 29 8 8 0 1 0 8 0 pffrag 232 48 0 45 6 5 1 1 0 482 0 pffrnode 88 48 0 45 6 5 1 1 0 8 0 pffrent 40 162 0 159 6 5 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 pfstitem 24 332 0 310 1 0 1 1 0 8 0 pfstkey 128 334 0 312 2 0 2 2 0 8 0 pfstate 376 334 0 312 10 6 4 5 0 8 1 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1366 0 881 36 4 32 35 0 8 0 art_table 32 1367 0 881 5 0 5 5 0 8 0 art_node 16 328 0 223 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 1 0 1 0 8 0 semapl 112 1866 0 1856 1 0 1 1 0 8 0 shmpl 112 141 0 13 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 20304 0 18799 95 0 95 95 0 8 0 ffsino 272 20304 0 18799 101 0 101 101 0 8 0 nchpl 144 42934 0 41286 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 155344 0 155344 6 5 1 2 0 8 1 percpumem 16 103 0 60 1 0 1 1 0 8 0 vmpool 696 119 0 119 15 14 1 1 0 8 1 kstatmem 264 144 0 120 2 0 2 2 0 8 0 scxspl 216 113778 0 113778 26 25 1 8 1 8 1 plimitpl 152 1125 0 1109 1 0 1 1 0 8 0 sigapl 424 15533 0 15466 12 4 8 9 0 8 0 futexpl 64 156439 0 156439 3 2 1 1 0 8 1 knotepl 120 671 0 0 10 1 9 9 0 8 0 kqueuepl 216 18524 0 18516 164 156 8 16 0 8 7 pipepl 320 3225 0 3197 61 58 3 9 0 8 0 fdescpl 496 15467 0 15440 6 1 5 5 0 8 0 filepl 152 120863 0 120589 196 178 18 23 0 8 7 lockfpl 104 5906 0 5904 9 8 1 4 0 8 0 lockfspl 48 1857 0 1855 1 0 1 1 0 8 0 sessionpl 144 42 0 25 1 0 1 1 0 8 0 pgrppl 48 364 0 347 1 0 1 1 0 8 0 ucredpl 104 15605 0 15590 1 0 1 1 0 8 0 zombiepl 144 15469 0 15466 3 2 1 1 0 8 0 processpl 1072 15533 0 15466 5 0 5 5 0 8 0 procpl 680 41886 0 41803 11 2 9 9 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 85 0 84 11 10 1 1 0 8 0 sockpl 488 15754 0 15676 346 332 14 37 0 8 4 mcl64k 65536 41 0 0 4 0 4 4 0 8 0 mcl16k 16384 32 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 12 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 105 0 0 7 4 3 5 0 8 0 mcl2k2 2112 14 0 0 1 0 1 1 0 8 0 mcl2k 2048 343 0 0 35 5 30 35 0 8 0 mtagpl 96 725 0 0 13 0 13 13 0 8 0 mbufpl 256 1865 0 0 97 0 97 97 0 8 0 bufpl 288 25773 0 19443 453 0 453 453 0 8 0 anonpl 24 1403294 0 1389506 178 82 96 128 0 186 0 amapchunkpl 152 467890 0 467029 91 49 42 49 0 158 3 amappl16 200 26282 0 25915 90 68 22 43 0 8 0 amappl15 192 23 0 21 1 0 1 1 0 8 0 amappl14 184 271 0 252 3 1 2 2 0 8 0 amappl13 176 42 0 41 2 1 1 1 0 8 0 amappl12 168 16391 0 16364 3 1 2 2 0 8 0 amappl11 160 63 0 49 1 0 1 1 0 8 0 amappl10 152 56 0 44 1 0 1 1 0 8 0 amappl9 144 275 0 274 1 0 1 1 0 8 0 amappl8 136 894 0 710 7 0 7 7 0 8 0 amappl7 128 137 0 122 2 0 2 2 0 8 0 amappl6 120 425 0 400 2 1 1 2 0 8 0 amappl5 112 458 0 447 1 0 1 1 0 8 0 amappl4 104 933 0 888 3 1 2 3 0 8 0 amappl3 96 92538 0 92466 4 1 3 3 0 8 0 amappl2 88 16232 0 16155 3 1 2 3 0 8 0 amappl1 80 64139 0 63594 23 11 12 23 0 8 0 amappl 88 148237 0 147989 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 72 143 0 13 3 0 3 3 0 8 0 uaddrrnd 24 15586 0 15559 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 15586 0 15559 1 0 1 1 0 8 0 vmmpekpl 168 119673 0 119608 4 0 4 4 0 8 0 vmmpepl 168 907764 0 905410 281 159 122 134 0 357 0 vmsppl 464 15585 0 15559 9 5 4 5 0 8 0 rwobjpl 56 218422 0 210786 124 12 112 114 0 8 0 pdppl 4096 31180 0 31118 612 542 70 84 0 8 8 pvpl 32 3958264 0 3938799 442 262 180 348 0 265 0 pmappl 248 15585 0 15559 7 5 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1730 0 806 28 0 28 28 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82bc2ff0) 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(ffffffff82cbdb20) at __mp_lock+0x120 __mp_lock_spin sys/kern/kern_lock.c:117 [inline] __mp_lock(ffffffff82cbdb20) at __mp_lock+0x120 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:588 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:158 __mp_lock(ffffffff82cbdb20) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cbdb20) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff800021283660) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021283660) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c894ccd65a0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff82bc2ff0) 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(ffffffff82cbdb20) at __mp_lock+0x120 __mp_lock_spin sys/kern/kern_lock.c:117 [inline] __mp_lock(ffffffff82cbdb20) at __mp_lock+0x120 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:588 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:158 __mp_lock(ffffffff82cbdb20) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cbdb20) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff800021283660) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021283660) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c894ccd65a0, count: -10 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(ffffffff8279c1e8) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281ee27,ffffffff827ac25b,2bb,ffffffff827a3e4a) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(e65811e0) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f0615e8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f0615e8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121bd38,fffffd806f0615e8,fffffd806f061670,0,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121bd38,0) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121bd38) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121bd38,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121bd38,ffff800024b7b610,ffff800024b7b660) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800024b7b6e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800024b7b6e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x758156f91de0, count: 2 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279c1e8) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281ee27,ffffffff827ac25b,2bb,ffffffff827a3e4a) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(e65811e0) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f0615e8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f0615e8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121bd38,fffffd806f0615e8,fffffd806f061670,0,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121bd38,0) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121bd38) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121bd38,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121bd38,ffff800024b7b610,ffff800024b7b660) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800024b7b6e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800024b7b6e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x758156f91de0, count: -13