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 265040 21615 0 0x14000 0x200 0 softnet0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279d30b) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281e44b,ffffffff8283c848,2bb,ffffffff827a2681) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(8867fa69) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f418798) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f418798) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121a810,fffffd806f418798,fffffd806f418820,6,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a810,6) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a810) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a810,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121a810,ffff80002dc03530,ffff80002dc03580) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002dc03600) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002dc03600) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a5fb46afa50, 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(ffffffff8279d30b) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281e44b,ffffffff8283c848,2bb,ffffffff827a2681) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(8867fa69) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f418798) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f418798) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121a810,fffffd806f418798,fffffd806f418820,6,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a810,6) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a810) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a810,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121a810,ffff80002dc03530,ffff80002dc03580) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002dc03600) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002dc03600) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a5fb46afa50, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002dc03170 rbx 0xffff800020d59b9f rdx 0 rcx 0xffff80002121a810 rax 0xffff800020d58ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x94d6064404fc478 r11 0x563c6f529a2823d1 r12 0xffff800020d599a0 r13 0 r14 0 r15 0x1 rip 0xffffffff82173d1c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002dc03160 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.5) pid=259298 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800021278ac0,0xffffffff82ce6d38 process=0xffff80002121d500 user=0xffff80002dbfe000, vmspace=0xfffffd806c4e7b00 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29625 98826 24188 32767 2 0x10 syz-executor.6 29625 489384 24188 32767 3 0x4000090 fsleep syz-executor.6 29625 335310 24188 32767 3 0x4000090 fsleep syz-executor.6 52731 383437 13932 32767 2 0x10 syz-executor.2 52731 352621 13932 32767 3 0x4000090 fsleep syz-executor.2 52731 354912 13932 32767 3 0x4000090 fsleep syz-executor.2 24188 96954 19116 32767 3 0x90 nanoslp syz-executor.6 19116 451467 65841 0 3 0x82 wait syz-executor.6 34778 465615 54563 32767 3 0x90 nanoslp syz-executor.4 54563 40568 65841 0 3 0x82 wait syz-executor.4 94310 502092 19668 32767 3 0x90 nanoslp syz-executor.1 19668 15430 65841 0 3 0x82 wait syz-executor.1 47683 167106 0 0 3 0x14200 bored sosplice 45606 87799 64762 32767 3 0x10 biowait syz-executor.7 98624 196315 70442 32767 3 0x90 nanoslp syz-executor.5 64762 338710 65841 0 3 0x82 wait syz-executor.7 60650 143149 52699 32767 3 0x10 biowait syz-executor.3 70442 467255 65841 0 3 0x82 wait syz-executor.5 52699 15465 65841 0 3 0x82 wait syz-executor.3 13932 189374 35808 32767 3 0x90 nanoslp syz-executor.2 35808 188442 65841 0 3 0x82 wait syz-executor.2 79556 353767 12784 32767 2 0x10 syz-executor.0 12784 466186 65841 0 3 0x82 wait syz-executor.0 65841 49928 66064 0 3 0x2000082 thrsleep syz-fuzzer 65841 83136 66064 0 3 0x6000082 nanoslp syz-fuzzer 65841 298567 66064 0 3 0x6000082 thrsleep syz-fuzzer 65841 175970 66064 0 3 0x6000082 wait syz-fuzzer 65841 470546 66064 0 3 0x6000082 wait syz-fuzzer 65841 113566 66064 0 3 0x6000082 wait syz-fuzzer 65841 451920 66064 0 3 0x6000082 wait syz-fuzzer 65841 409478 66064 0 3 0x6000082 wait syz-fuzzer 65841 486945 66064 0 3 0x6000082 thrsleep syz-fuzzer 65841 21433 66064 0 3 0x6000082 wait syz-fuzzer 65841 448297 66064 0 3 0x6000082 thrsleep syz-fuzzer 65841 42104 66064 0 3 0x6000082 wait syz-fuzzer 65841 158513 66064 0 3 0x6000082 thrsleep syz-fuzzer 65841 329969 66064 0 3 0x6000082 kqread syz-fuzzer 65841 450484 66064 0 3 0x6000082 thrsleep syz-fuzzer 65841 240881 66064 0 3 0x6000082 wait syz-fuzzer 66064 433771 26001 0 3 0x10008a sigsusp ksh 26001 195085 65970 0 3 0x9a kqread sshd 34244 190128 1 0 3 0x100083 ttyin getty 65970 462582 1 0 3 0x88 kqread sshd 42142 453968 82894 73 3 0x1100090 kqread syslogd 82894 161782 1 0 3 0x100082 netio syslogd 87348 94140 1 0 3 0x100080 kqread resolvd 7170 54433 75492 77 3 0x100092 kqread dhcpleased 2994 257109 75492 77 3 0x100092 kqread dhcpleased 75492 68676 1 0 3 0x80 kqread dhcpleased 58584 313247 0 0 3 0x14200 bored smr 10947 95107 0 0 2 0x14200 zerothread 70676 87370 0 0 3 0x14200 aiodoned aiodoned 88937 333562 0 0 3 0x14200 syncer update 288 30572 0 0 3 0x14200 cleaner cleaner 91411 362332 0 0 2 0x14200 reaper 4440 51617 0 0 3 0x14200 pgdaemon pagedaemon 84583 162949 0 0 3 0x14200 bored viomb 5964 282988 0 0 3 0x40014200 acpi0 acpi0 36661 469086 0 0 3 0x40014200 idle1 70450 514426 0 0 3 0x14200 bored softnet3 54884 389781 0 0 3 0x14200 bored softnet2 23290 472335 0 0 3 0x14200 bored softnet1 21615 265040 0 0 7 0x14200 softnet0 55192 420116 0 0 3 0x14200 bored systqmp 3951 88981 0 0 3 0x14200 bored systq 81551 335332 0 0 3 0x40014200 bored softclock 21634 76697 0 0 3 0x40014200 idle0 1 128694 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 (0xffffffff82c55ce8) #0 witness_lock+0x447 #1 wakeup_n+0x37 sys/kern/kern_synch.c:541 #2 sched_idle+0x232 sys/kern/kern_sched.c:176 #3 proc_trampoline+0x1c Process 45606 (syz-executor.7) thread 0xffff800021270000 (87799) exclusive rrwlock inode r = 0 (0xfffffd80749ab928) #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 (0xfffffd80749ab5f8) #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 Process 60650 (syz-executor.3) thread 0xffff800021278d68 (143149) exclusive rrwlock inode r = 0 (0xfffffd80749ab1b8) #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 (0xfffffd80675fe1b0) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10196 6410K 6420K 78643K 11292 0 pcb 13 12K 14K 78643K 17 0 rtable 240 6K 7K 78643K 645 0 pf 29 8K 8K 78643K 41 0 ifaddr 44 15K 15K 78643K 72 0 ifgroup 50 2K 2K 78643K 74 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 72 0 ioctlops 0 0K 2K 78643K 53 0 iov 0 0K 24K 78643K 814 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 2340 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 109 0 VM map 2 1K 1K 78643K 2 0 sem 11 1K 1K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 21 77K 125K 78643K 7527 0 sigio 0 0K 0K 78643K 353 0 proc 56 78K 115K 78643K 950 0 subproc 104 6K 6K 78643K 182 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 283 0 in_multi 99 7K 7K 78643K 221 0 ether_multi 1 0K 0K 78643K 6 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 115 519K 519K 78643K 115 0 exec 0 0K 1K 78643K 1678 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 400 90K 101K 78643K 75731 0 UVM aobj 131 4K 5K 78643K 145 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 149 0 NDP 11 0K 2K 78643K 45 0 temp 74 5920K 6000K 78643K 20694 0 kqueue 12 18K 43K 78643K 2470 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 120 208 0 205 3 2 1 3 0 8 0 rtentry 112 187 0 74 4 0 4 4 0 8 0 unpcb 144 5352 0 5339 54 48 6 10 0 8 5 syncache 304 59 0 59 15 15 0 1 0 8 0 tcpqe 32 159 0 159 10 10 0 1 0 8 0 tcpcb 808 3849 0 3834 98 94 4 15 0 8 0 arp 120 30 0 12 1 0 1 1 0 8 0 ipq 40 11 0 11 6 5 1 1 0 8 1 ipqe 40 93 0 93 6 5 1 1 0 8 1 inpcb 368 5449 0 5432 102 98 4 14 0 8 0 nd6 136 52 0 25 1 0 1 1 0 8 0 kcovpl 48 14 0 6 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 767 0 293 30 0 30 30 0 8 0 art_table 32 768 0 293 4 0 4 4 0 8 0 art_node 16 186 0 83 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 0 1 0 1 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 142 0 14 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 10589 0 9145 91 0 91 91 0 8 0 ffsino 272 10589 0 9145 97 0 97 97 0 8 0 nchpl 144 20240 0 18597 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 60560 0 60559 3 2 1 2 0 8 0 percpumem 16 49 0 6 1 0 1 1 0 8 0 kstatmem 264 34 0 12 2 0 2 2 0 8 0 scxspl 216 66315 0 66313 34 32 2 8 1 8 1 plimitpl 152 1249 0 1224 13 11 2 2 0 8 1 sigapl 424 7812 0 7760 7 0 7 7 0 8 0 futexpl 64 56504 0 56500 2 1 1 1 0 8 0 knotepl 120 665 0 0 17 0 17 17 0 8 0 kqueuepl 216 3156 0 3148 19 18 1 5 0 8 0 pipepl 320 9822 0 9793 114 108 6 17 0 8 3 fdescpl 496 7794 0 7762 6 1 5 6 0 8 0 filepl 152 56197 0 55956 122 105 17 22 0 8 6 lockfpl 104 753 0 751 1 0 1 1 0 8 0 lockfspl 48 226 0 224 1 0 1 1 0 8 0 sessionpl 144 29 0 13 1 0 1 1 0 8 0 pgrppl 48 929 0 913 1 0 1 1 0 8 0 ucredpl 104 5766 0 5748 1 0 1 1 0 8 0 zombiepl 144 7763 0 7760 1 0 1 1 0 8 0 processpl 1072 7812 0 7760 5 1 4 5 0 8 0 procpl 680 21061 0 20989 19 11 8 8 0 8 0 sosppl 168 505 0 504 7 6 1 1 0 8 0 sockpl 488 11220 0 11186 260 246 14 34 0 8 8 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 30 0 0 3 0 3 3 0 8 0 mcl2k2 2112 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 315 0 0 32 5 27 32 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1049 0 0 56 0 56 56 0 8 0 bufpl 288 16633 0 10307 453 0 453 453 0 8 0 anonpl 24 800452 0 788907 129 48 81 99 0 186 0 amapchunkpl 152 239272 0 238411 84 44 40 50 0 158 1 amappl16 200 15418 0 15109 67 49 18 29 0 8 1 amappl15 192 23 0 23 2 2 0 1 0 8 0 amappl14 184 164 0 150 2 1 1 2 0 8 0 amappl13 176 24 0 22 1 0 1 1 0 8 0 amappl12 168 8504 0 8472 2 0 2 2 0 8 0 amappl11 160 53 0 43 1 0 1 1 0 8 0 amappl10 152 44 0 30 1 0 1 1 0 8 0 amappl9 144 228 0 227 1 0 1 1 0 8 0 amappl8 136 551 0 409 5 0 5 5 0 8 0 amappl7 128 82 0 67 2 0 2 2 0 8 0 amappl6 120 346 0 325 2 1 1 2 0 8 0 amappl5 112 322 0 313 1 0 1 1 0 8 0 amappl4 104 706 0 667 3 1 2 3 0 8 0 amappl3 96 47274 0 47189 5 2 3 4 0 8 0 amappl2 88 8354 0 8278 3 1 2 3 0 8 0 amappl1 80 35201 0 34676 23 10 13 22 0 8 0 amappl 88 74903 0 74666 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 72 144 0 14 3 0 3 3 0 8 0 uaddrrnd 24 7794 0 7762 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7794 0 7762 1 0 1 1 0 8 0 vmmpekpl 168 94719 0 94656 4 0 4 4 0 8 0 vmmpepl 168 456421 0 454087 204 91 113 127 0 357 1 vmsppl 464 7793 0 7762 6 1 5 6 0 8 0 rwobjpl 56 119794 0 112342 108 2 106 107 0 8 0 pdppl 4096 15596 0 15524 293 211 82 96 0 8 10 pvpl 32 2319066 0 2301650 360 204 156 359 0 265 0 pmappl 248 7793 0 7762 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1293 0 423 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82bafff0) 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+0x41 sys/dev/kcov.c:164 intr_handler(ffff8000211878d0,ffff80000027b600) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f __mp_lock(ffffffff82c532e8) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c532e8) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff800021187a20,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_release_all(ffffffff82c532e8) at __mp_release_all+0xb2 sys/kern/kern_lock.c:197 msleep(ffff80000002d000,ffff80000002d018,20,ffffffff827d6d24,0) at msleep+0x156 sys/kern/kern_synch.c:234 taskq_next_work(ffff80000002d000,ffff800021187c00) 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: 2 ddb{0}> trace x86_ipi_db(ffffffff82bafff0) 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+0x41 sys/dev/kcov.c:164 intr_handler(ffff8000211878d0,ffff80000027b600) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f __mp_lock(ffffffff82c532e8) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c532e8) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff800021187a20,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_release_all(ffffffff82c532e8) at __mp_release_all+0xb2 sys/kern/kern_lock.c:197 msleep(ffff80000002d000,ffff80000002d018,20,ffffffff827d6d24,0) at msleep+0x156 sys/kern/kern_synch.c:234 taskq_next_work(ffff80000002d000,ffff800021187c00) 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: -13 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(ffffffff8279d30b) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281e44b,ffffffff8283c848,2bb,ffffffff827a2681) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(8867fa69) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f418798) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f418798) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121a810,fffffd806f418798,fffffd806f418820,6,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a810,6) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a810) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a810,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121a810,ffff80002dc03530,ffff80002dc03580) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002dc03600) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002dc03600) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a5fb46afa50, count: 2 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279d30b) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281e44b,ffffffff8283c848,2bb,ffffffff827a2681) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(8867fa69) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f418798) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f418798) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002121a810,fffffd806f418798,fffffd806f418820,6,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a810,6) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a810) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a810,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121a810,ffff80002dc03530,ffff80002dc03580) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002dc03600) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002dc03600) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a5fb46afa50, count: -13