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 518339 29373 0 0 0 0 syz-executor1939936622 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a15bc) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281ff28,ffffffff827abaa9,2bb,ffffffff827a3b15) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(bced0db3) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806ef64438) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806ef64438) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002127f540,fffffd806ef64438,fffffd806ef644c0,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002127f540,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002127f540) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002127f540,0,0,1) at exit1+0x3ff sys/kern/kern_exit.c:206 sys_exit(ffff80002127f540,ffff800021295700,ffff800021295750) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212957d0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212957d0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78fb7d1a8320, 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(ffffffff827a15bc) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281ff28,ffffffff827abaa9,2bb,ffffffff827a3b15) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(bced0db3) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806ef64438) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806ef64438) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002127f540,fffffd806ef64438,fffffd806ef644c0,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002127f540,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002127f540) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002127f540,0,0,1) at exit1+0x3ff sys/kern/kern_exit.c:206 sys_exit(ffff80002127f540,ffff800021295700,ffff800021295750) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212957d0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212957d0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78fb7d1a8320, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800021295340 rbx 0xffff800020d59b9f rdx 0x3fd rcx 0 rax 0x92 r8 0x101010101010101 r9 0x8080808080808080 r10 0x602749be0eb3aab2 r11 0x457343b1872fcbdb r12 0xffff800020d599a0 r13 0 r14 0 r15 0x1 rip 0xffffffff81508bec db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800021295330 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor1939936622) pid=98160 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002121ed68,0xffff80002127f000 process=0xffff800021281938 user=0xffff800021290000, vmspace=0xfffffd806c354cc8 estcpu=36, cpticks=3, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29373 518339 31386 0 7 0 syz-executor1939936622 9393 232192 26094 0 3 0x80 nanoslp syz-executor1939936622 18323 208810 26094 0 3 0x80 nanoslp syz-executor1939936622 7623 140577 26094 0 3 0x80 nanoslp syz-executor1939936622 5302 158487 26094 0 3 0x80 nanoslp syz-executor1939936622 83458 245869 26094 0 3 0 biowait syz-executor1939936622 53047 460281 26094 0 3 0 biowait syz-executor1939936622 72187 179165 26094 0 3 0x80 nanoslp syz-executor1939936622 31386 158288 26094 0 3 0x80 nanoslp syz-executor1939936622 26094 19033 15343 0 3 0x82 nanoslp syz-executor1939936622 15343 450019 9600 0 3 0x10008a sigsusp ksh 9600 294331 93249 0 3 0x9a kqread sshd 58881 384116 1 0 3 0x100083 ttyin getty 93249 459860 1 0 3 0x88 kqread sshd 92793 400348 96648 74 3 0x1100092 bpf pflogd 96648 423173 1 0 3 0x80 netio pflogd 78502 443824 27205 73 3 0x1100090 kqread syslogd 27205 424038 1 0 3 0x100082 netio syslogd 1503 239974 1 0 3 0x100080 kqread resolvd 90195 29210 81537 77 3 0x100092 kqread dhcpleased 17646 397778 81537 77 3 0x100092 kqread dhcpleased 81537 219229 1 0 3 0x80 kqread dhcpleased 9258 73019 0 0 3 0x14200 bored smr 66580 444555 0 0 2 0x14200 zerothread 90080 42370 0 0 3 0x14200 aiodoned aiodoned 69076 307453 0 0 3 0x14200 syncer update 89517 135563 0 0 3 0x14200 cleaner cleaner 61786 312322 0 0 2 0x14200 reaper 15572 178064 0 0 3 0x14200 pgdaemon pagedaemon 62141 238846 0 0 3 0x14200 bored viomb 33971 497886 0 0 3 0x40014200 acpi0 acpi0 14254 41796 0 0 3 0x40014200 idle1 18599 106199 0 0 3 0x14200 bored softnet3 3595 514003 0 0 3 0x14200 bored softnet2 97211 8019 0 0 3 0x14200 bored softnet1 96772 58440 0 0 3 0x14200 bored softnet0 75428 377162 0 0 3 0x14200 bored systqmp 99864 299884 0 0 3 0x14200 bored systq 87589 150150 0 0 3 0x40014200 bored softclock 91492 55871 0 0 3 0x40014200 idle0 1 253978 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 83458 (syz-executor1939936622) thread 0xffff8000211b2ff8 (245869) exclusive rrwlock inode r = 0 (0xfffffd806c90b0a0) #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 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cffeb38) #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 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #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 Process 53047 (syz-executor1939936622) thread 0xffff8000211b3d40 (460281) exclusive rrwlock inode r = 0 (0xfffffd806c90b3d0) #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 (0xfffffd806cffe6f8) #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 10162 6455K 6456K 78643K 11240 0 pcb 13 8K 8K 78643K 13 0 rtable 58 1K 2K 78643K 114 0 pf 15 6K 10K 78643K 26 0 ifaddr 13 9K 9K 78643K 13 0 ifgroup 22 1K 1K 78643K 22 0 counters 44 33K 33K 78643K 44 0 ioctlops 0 0K 4K 78643K 1475 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1176 74K 74K 78643K 1192 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 1 0K 0K 78643K 1 0 proc 67 91K 91K 78643K 302 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 25 122K 122K 78643K 25 0 exec 0 0K 1K 78643K 269 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 156 70K 72K 78643K 9186 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 4 0 temp 1 5904K 5968K 78643K 4692 0 kqueue 11 16K 24K 78643K 812 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 20 0 17 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 144 35 0 20 1 0 1 1 0 8 0 syncache 304 5 0 5 2 1 1 1 0 8 1 tcpqe 32 151 0 151 1 1 0 1 0 8 0 tcpcb 808 797 0 790 2 0 2 2 0 8 1 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 368 1611 0 1603 2 0 2 2 0 8 1 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 9 0 2 1 0 1 1 0 8 0 pfstkey 128 9 0 2 1 0 1 1 0 8 0 pfstate 376 9 0 2 1 0 1 1 0 8 0 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 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2231 0 821 89 0 89 89 0 8 0 ffsino 272 2231 0 821 95 0 95 95 0 8 0 nchpl 144 4785 0 3190 60 0 60 60 0 8 0 uvmvnodes 80 2245 0 0 46 0 46 46 0 8 0 vnodes 216 2245 0 0 125 0 125 125 0 8 0 namei 1024 9311 0 9310 3 1 2 2 0 8 1 percpumem 16 35 0 0 1 0 1 1 0 8 0 kstatmem 264 8 0 0 1 0 1 1 0 8 0 scxspl 216 9942 0 9940 10 6 4 8 1 8 3 plimitpl 152 25 0 10 1 0 1 1 0 8 0 sigapl 424 1135 0 1089 7 1 6 6 0 8 0 futexpl 64 4265 0 4265 1 0 1 1 0 8 1 knotepl 120 50 0 0 2 0 2 2 0 8 0 kqueuepl 216 809 0 802 1 0 1 1 0 8 0 pipepl 320 94 0 91 2 1 1 1 0 8 0 fdescpl 496 1118 0 1093 4 0 4 4 0 8 0 filepl 152 5215 0 5155 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 104 71 0 59 1 0 1 1 0 8 0 zombiepl 144 1094 0 1089 2 1 1 1 0 8 0 processpl 1072 1135 0 1089 4 0 4 4 0 8 0 procpl 680 2313 0 2266 6 1 5 5 0 8 0 sockpl 488 1666 0 1640 6 1 5 5 0 8 1 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 248 0 0 31 0 31 31 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 273 0 0 18 0 18 18 0 8 0 bufpl 288 3373 0 90 235 0 235 235 0 8 0 anonpl 24 228526 0 226259 28 12 16 25 0 186 0 amapchunkpl 152 30457 0 30190 18 1 17 17 0 158 3 amappl16 200 6179 0 6170 6 5 1 5 0 8 0 amappl15 192 6 0 5 1 0 1 1 0 8 0 amappl14 184 109 0 98 1 0 1 1 0 8 0 amappl13 176 17 0 17 1 1 0 1 0 8 0 amappl12 168 1662 0 1637 3 1 2 2 0 8 0 amappl11 160 59 0 45 1 0 1 1 0 8 0 amappl10 152 21 0 21 2 2 0 1 0 8 0 amappl9 144 186 0 186 2 2 0 1 0 8 0 amappl8 136 28 0 26 1 0 1 1 0 8 0 amappl7 128 820 0 808 1 0 1 1 0 8 0 amappl6 120 158 0 143 1 0 1 1 0 8 0 amappl5 112 128 0 117 1 0 1 1 0 8 0 amappl4 104 467 0 434 1 0 1 1 0 8 0 amappl3 96 6934 0 6877 4 1 3 3 0 8 1 amappl2 88 1289 0 1237 2 0 2 2 0 8 0 amappl1 80 12624 0 12123 17 5 12 12 0 8 1 amappl 88 8870 0 8770 4 0 4 4 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1118 0 1093 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1118 0 1093 1 0 1 1 0 8 0 vmmpekpl 168 11531 0 11510 2 0 2 2 0 8 0 vmmpepl 168 68961 0 67638 77 8 69 69 0 357 5 vmsppl 464 1117 0 1093 4 0 4 4 0 8 0 rwobjpl 56 29069 0 26094 45 2 43 43 0 8 0 pdppl 4096 2244 0 2186 92 22 70 70 0 8 12 pvpl 32 399058 0 393516 64 14 50 57 0 265 1 pmappl 248 1117 0 1093 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 589 0 26 17 0 17 17 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82bf2ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc intr_handler(ffff8000212cb5e0,ffff80000006bc00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_const_cmp4(ffff8000212cb770,ffff8000212cb770) at __sanitizer_cov_trace_const_cmp4+0x3c sys/dev/kcov.c:236 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78fb7d1a81a0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff82bf2ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc intr_handler(ffff8000212cb5e0,ffff80000006bc00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_const_cmp4(ffff8000212cb770,ffff8000212cb770) at __sanitizer_cov_trace_const_cmp4+0x3c sys/dev/kcov.c:236 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78fb7d1a81a0, count: -8 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(ffffffff827a15bc) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281ff28,ffffffff827abaa9,2bb,ffffffff827a3b15) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(bced0db3) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806ef64438) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806ef64438) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002127f540,fffffd806ef64438,fffffd806ef644c0,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002127f540,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002127f540) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002127f540,0,0,1) at exit1+0x3ff sys/kern/kern_exit.c:206 sys_exit(ffff80002127f540,ffff800021295700,ffff800021295750) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212957d0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212957d0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78fb7d1a8320, count: 2 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a15bc) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281ff28,ffffffff827abaa9,2bb,ffffffff827a3b15) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(bced0db3) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806ef64438) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806ef64438) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002127f540,fffffd806ef64438,fffffd806ef644c0,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002127f540,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002127f540) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002127f540,0,0,1) at exit1+0x3ff sys/kern/kern_exit.c:206 sys_exit(ffff80002127f540,ffff800021295700,ffff800021295750) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212957d0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212957d0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78fb7d1a8320, count: -13 ddb{1}>