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 317701 22033 0 0x14000 0x200 0 softnet0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a0dbf) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281f487,ffffffff82838b3c,2bb,ffffffff8279e3af) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(fafbbb0b) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f19a510) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f19a510) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002128f298,fffffd806f19a510,fffffd806f19a598,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002128f298,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002128f298) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002128f298,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002128f298,ffff8000295ab2d0,ffff8000295ab320) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000295ab3a0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295ab3a0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70581ced3d50, 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(ffffffff827a0dbf) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281f487,ffffffff82838b3c,2bb,ffffffff8279e3af) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(fafbbb0b) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f19a510) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f19a510) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002128f298,fffffd806f19a510,fffffd806f19a598,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002128f298,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002128f298) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002128f298,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002128f298,ffff8000295ab2d0,ffff8000295ab320) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000295ab3a0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295ab3a0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70581ced3d50, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000295aaf10 rbx 0xffff800020d59b9f rdx 0 rcx 0xffff80002128f298 rax 0xffff800020d58ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3a84efb23f2246d2 r11 0x874da9f2f220d31d r12 0xffff800020d599a0 r13 0 r14 0 r15 0x1 rip 0xffffffff8248a28c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000295aaf00 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.3) pid=450826 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212a2aa8,0xffff80002128e010 process=0xffff8000ffff4878 user=0xffff8000295a6000, vmspace=0xfffffd807a94e3c8 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63628 64008 74362 32767 3 0x90 nanoslp syz-executor.5 63628 273950 74362 32767 3 0x4000090 netcon syz-executor.5 63628 345344 74362 32767 3 0x4000090 fsleep syz-executor.5 35136 516969 82519 32767 2 0x10 syz-executor.6 82519 330631 47521 0 3 0x82 wait syz-executor.6 49775 278613 0 0 2 0x14200 sosplice 4375 93168 76568 32767 3 0x90 nanoslp syz-executor.7 76568 365366 47521 0 3 0x82 wait syz-executor.7 74362 246902 89539 32767 3 0x90 nanoslp syz-executor.5 89539 310278 47521 0 3 0x82 wait syz-executor.5 92325 1789 95200 32767 3 0x90 piperd syz-executor.4 87633 350858 30624 32767 3 0x90 nanoslp syz-executor.3 95200 276373 47521 0 3 0x82 wait syz-executor.4 30624 150592 47521 0 3 0x82 wait syz-executor.3 31349 491123 67031 32767 3 0x90 nanoslp syz-executor.2 67031 151201 47521 0 3 0x82 wait syz-executor.2 12710 370388 38259 32767 3 0x90 piperd syz-executor.0 73026 49059 74861 32767 2 0x10 syz-executor.1 74861 450045 47521 0 3 0x82 wait syz-executor.1 38259 184036 47521 0 3 0x82 wait syz-executor.0 47521 314545 13368 0 3 0x2000082 thrsleep syz-fuzzer 47521 351236 13368 0 3 0x6000082 thrsleep syz-fuzzer 47521 444174 13368 0 3 0x6000082 wait syz-fuzzer 47521 401780 13368 0 3 0x6000082 wait syz-fuzzer 47521 333551 13368 0 3 0x6000082 wait syz-fuzzer 47521 230985 13368 0 3 0x6000082 thrsleep syz-fuzzer 47521 79713 13368 0 3 0x6000082 wait syz-fuzzer 47521 10726 13368 0 3 0x6000082 wait syz-fuzzer 47521 219438 13368 0 3 0x6000082 thrsleep syz-fuzzer 47521 165349 13368 0 3 0x6000082 wait syz-fuzzer 47521 178737 13368 0 3 0x6000082 thrsleep syz-fuzzer 47521 15431 13368 0 3 0x6000082 kqread syz-fuzzer 47521 183392 13368 0 3 0x6000082 wait syz-fuzzer 47521 237621 13368 0 3 0x6000082 thrsleep syz-fuzzer 47521 398325 13368 0 3 0x6000082 wait syz-fuzzer 47521 222196 13368 0 3 0x6000082 thrsleep syz-fuzzer 13368 376796 88041 0 3 0x10008a sigsusp ksh 88041 298311 10035 0 3 0x9a kqread sshd 70623 237279 1 0 3 0x100083 ttyin getty 10035 239373 1 0 3 0x88 kqread sshd 36432 475187 12590 73 3 0x1100090 kqread syslogd 12590 138542 1 0 3 0x100082 netio syslogd 73586 123358 1 0 3 0x100080 kqread resolvd 51640 23904 95709 77 3 0x100092 kqread dhcpleased 42442 15846 95709 77 3 0x100092 kqread dhcpleased 95709 386076 1 0 3 0x80 kqread dhcpleased 55669 386110 0 0 3 0x14200 bored smr 50625 294628 0 0 2 0x14200 zerothread 19833 107563 0 0 3 0x14200 aiodoned aiodoned 17384 95056 0 0 3 0x14200 syncer update 91733 63230 0 0 3 0x14200 cleaner cleaner 40207 241460 0 0 2 0x14200 reaper 14342 348193 0 0 3 0x14200 pgdaemon pagedaemon 57438 16705 0 0 3 0x14200 bored viomb 92979 184682 0 0 3 0x40014200 acpi0 acpi0 93270 459435 0 0 3 0x40014200 idle1 12546 72290 0 0 3 0x14200 bored softnet3 71138 473687 0 0 3 0x14200 bored softnet2 28937 201824 0 0 3 0x14200 bored softnet1 22033 317701 0 0 7 0x14200 softnet0 24855 439667 0 0 3 0x14200 bored systqmp 17618 65733 0 0 3 0x14200 bored systq 9281 260408 0 0 2 0x40014200 softclock 9722 423063 0 0 3 0x40014200 idle0 1 186675 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 49775 (sosplice) thread 0xffff8000212a2d50 (278613) shared rwlock sosplice r = 0 (0xffff800000d31c70) #0 witness_lock+0x447 #1 taskq_thread+0xca sys/kern/kern_task.c:446 #2 proc_trampoline+0x1c Process 22033 (softnet0) thread 0xffff800021168aa0 (317701) shared rwlock softnet0 r = 0 (0xffff80000002d070) #0 witness_lock+0x447 #1 taskq_thread+0xca sys/kern/kern_task.c:446 #2 proc_trampoline+0x1c Process 9281 (softclock) thread 0xffff800021169298 (260408) shared rwlock timeout r = 0 (0xffffffff82bc9ff0) #0 witness_lock+0x447 #1 timeout_run+0xbb sys/kern/kern_timeout.c:636 #2 softclock_thread+0x124 sys/kern/kern_timeout.c:763 #3 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10193 6409K 6420K 78643K 11277 0 pcb 13 10K 12K 78643K 15 0 rtable 240 6K 7K 78643K 453 0 pf 29 8K 8K 78643K 33 0 ifaddr 44 15K 15K 78643K 54 0 ifgroup 50 2K 2K 78643K 58 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 64 0 ioctlops 0 0K 2K 78643K 73 0 iov 0 0K 16K 78643K 262 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 1744 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 64 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 629 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 20 73K 113K 78643K 3203 0 sigio 0 0K 0K 78643K 53 0 proc 56 78K 127K 78643K 638 0 subproc 104 6K 6K 78643K 130 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 94 0 in_multi 99 7K 7K 78643K 147 0 ether_multi 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 97 440K 440K 78643K 97 0 exec 0 0K 1K 78643K 870 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 367 90K 98K 78643K 33854 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 86 0 NDP 11 0K 2K 78643K 33 0 temp 74 5920K 6048K 78643K 11230 0 kqueue 12 18K 32K 78643K 293 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 80 0 77 1 0 1 1 0 8 0 rtentry 112 142 0 29 4 0 4 4 0 8 0 unpcb 144 1516 0 1503 22 18 4 6 0 8 3 syncache 304 32 0 32 7 6 1 1 0 8 1 tcpqe 32 334 0 334 5 4 1 1 0 8 1 tcpcb 808 872 0 856 31 29 2 11 0 8 0 arp 120 23 0 4 1 0 1 1 0 8 0 ipq 40 5 0 5 2 2 0 1 0 8 0 ipqe 40 12 0 12 2 2 0 1 0 8 0 inpcb 368 2535 0 2511 44 36 8 11 0 8 5 nd6 136 38 0 12 1 0 1 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 572 0 115 29 0 29 29 0 8 0 art_table 32 573 0 115 4 0 4 4 0 8 0 art_node 16 141 0 38 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 622 0 612 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 5373 0 3931 91 0 91 91 0 8 0 ffsino 272 5373 0 3931 97 0 97 97 0 8 0 nchpl 144 9615 0 7973 63 0 63 63 0 8 0 uvmvnodes 80 5512 0 0 113 0 113 113 0 8 0 vnodes 216 5512 0 0 307 0 307 307 0 8 0 namei 1024 35031 0 35031 2 1 1 1 0 8 1 percpumem 16 45 0 2 1 0 1 1 0 8 0 kstatmem 264 26 0 4 2 0 2 2 0 8 0 scxspl 216 37959 0 37959 14 11 3 8 1 8 3 plimitpl 152 750 0 727 7 5 2 2 0 8 1 sigapl 424 3495 0 3443 7 0 7 7 0 8 0 futexpl 64 26250 0 26249 5 4 1 1 0 8 0 knotepl 120 396 0 0 11 0 11 11 0 8 0 kqueuepl 216 660 0 652 13 12 1 5 0 8 0 pipepl 320 810 0 782 24 16 8 8 0 8 5 fdescpl 496 3477 0 3446 7 2 5 6 0 8 0 filepl 152 20958 0 20719 54 39 15 19 0 8 5 lockfpl 104 1023 0 1021 3 2 1 2 0 8 0 lockfspl 48 139 0 137 1 0 1 1 0 8 0 sessionpl 144 25 0 9 1 0 1 1 0 8 0 pgrppl 48 47 0 31 1 0 1 1 0 8 0 ucredpl 104 2436 0 2418 1 0 1 1 0 8 0 zombiepl 144 3447 0 3443 1 0 1 1 0 8 0 processpl 1072 3495 0 3443 4 0 4 4 0 8 0 procpl 680 9138 0 9068 16 8 8 8 0 8 1 sosppl 168 79 0 76 7 6 1 1 0 8 0 sockpl 488 4278 0 4241 85 72 13 24 0 8 7 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 18 0 0 3 1 2 3 0 8 0 mcl12k 12288 13 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 263 0 0 31 3 28 31 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 383 0 0 18 1 17 17 0 8 0 bufpl 288 9852 0 3526 453 0 453 453 0 8 0 anonpl 24 564563 0 553212 160 65 95 117 0 186 7 amapchunkpl 152 121569 0 120698 61 20 41 53 0 158 0 amappl16 200 15064 0 14789 106 78 28 40 0 8 11 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 158 0 146 2 1 1 2 0 8 0 amappl13 176 30 0 28 1 0 1 1 0 8 0 amappl12 168 4139 0 4106 2 0 2 2 0 8 0 amappl11 160 53 0 42 1 0 1 1 0 8 0 amappl10 152 28 0 18 1 0 1 1 0 8 0 amappl9 144 170 0 170 11 10 1 1 0 8 1 amappl8 136 322 0 233 4 0 4 4 0 8 0 amappl7 128 70 0 58 2 0 2 2 0 8 0 amappl6 120 264 0 249 1 0 1 1 0 8 0 amappl5 112 260 0 251 1 0 1 1 0 8 0 amappl4 104 648 0 609 3 1 2 2 0 8 0 amappl3 96 21571 0 21487 5 2 3 4 0 8 0 amappl2 88 3943 0 3875 3 1 2 3 0 8 0 amappl1 80 20464 0 19934 22 10 12 22 0 8 0 amappl 88 33221 0 32983 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 3477 0 3446 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3477 0 3446 1 0 1 1 0 8 0 vmmpekpl 168 31821 0 31766 3 0 3 3 0 8 0 vmmpepl 168 223070 0 220872 170 56 114 125 0 357 6 vmsppl 464 3476 0 3446 7 2 5 6 0 8 0 rwobjpl 56 70726 0 63775 107 6 101 101 0 8 0 pdppl 4096 6962 0 6892 185 103 82 90 0 8 12 pvpl 32 1379982 0 1362683 347 166 181 337 0 265 18 pmappl 248 3476 0 3446 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1016 0 184 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82bc7ff0) 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(ffffffff82d6d010) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d6d010) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1a kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1a sys/dev/kcov.c:158 mtx_enter_try(ffff80000002d018) at mtx_enter_try+0x7d sys/kern/kern_lock.c:287 mtx_enter(ffff80000002d018) at mtx_enter+0x4f sys/kern/kern_lock.c:266 msleep(ffff80000002d000,ffff80000002d018,20,ffffffff827d9115,0) at msleep+0x1f1 sys/kern/kern_synch.c:239 taskq_next_work(ffff80000002d000,ffff8000211871c0) at taskq_next_work+0x6e sys/kern/kern_task.c:403 taskq_thread(ffff80000002d000) at taskq_thread+0x135 sys/kern/kern_task.c:443 end trace frame: 0x0, count: 3 ddb{0}> trace x86_ipi_db(ffffffff82bc7ff0) 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(ffffffff82d6d010) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d6d010) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1a kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1a sys/dev/kcov.c:158 mtx_enter_try(ffff80000002d018) at mtx_enter_try+0x7d sys/kern/kern_lock.c:287 mtx_enter(ffff80000002d018) at mtx_enter+0x4f sys/kern/kern_lock.c:266 msleep(ffff80000002d000,ffff80000002d018,20,ffffffff827d9115,0) at msleep+0x1f1 sys/kern/kern_synch.c:239 taskq_next_work(ffff80000002d000,ffff8000211871c0) at taskq_next_work+0x6e sys/kern/kern_task.c:403 taskq_thread(ffff80000002d000) at taskq_thread+0x135 sys/kern/kern_task.c:443 end trace frame: 0x0, count: -12 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(ffffffff827a0dbf) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281f487,ffffffff82838b3c,2bb,ffffffff8279e3af) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(fafbbb0b) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f19a510) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f19a510) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002128f298,fffffd806f19a510,fffffd806f19a598,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002128f298,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002128f298) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002128f298,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002128f298,ffff8000295ab2d0,ffff8000295ab320) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000295ab3a0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295ab3a0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70581ced3d50, count: 2 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a0dbf) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281f487,ffffffff82838b3c,2bb,ffffffff8279e3af) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(fafbbb0b) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f19a510) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f19a510) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002128f298,fffffd806f19a510,fffffd806f19a598,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002128f298,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002128f298) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002128f298,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002128f298,ffff8000295ab2d0,ffff8000295ab320) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000295ab3a0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295ab3a0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70581ced3d50, count: -13