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 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(825afe3d) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f1e8af8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f1e8af8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff8000211d97e8,fffffd806f1e8af8,fffffd806f1e8b80,0,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000211d97e8,0) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000211d97e8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000211d97e8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000211d97e8,ffff800021281350,ffff8000212813a0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800021281420) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021281420) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78770f018aa0, 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(825afe3d) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f1e8af8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f1e8af8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff8000211d97e8,fffffd806f1e8af8,fffffd806f1e8b80,0,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000211d97e8,0) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000211d97e8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000211d97e8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000211d97e8,ffff800021281350,ffff8000212813a0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800021281420) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021281420) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78770f018aa0, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800021280f90 rbx 0xffff800020d59b9f rdx 0 rcx 0xffff8000211d97e8 rax 0xffff800020d58ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb608a2b3a8d4be8b r11 0x677943637003677f r12 0xffff800020d599a0 r13 0 r14 0 r15 0x1 rip 0xffffffff81244a2c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800021280f80 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.6) pid=199093 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000211fb808,0xffff80002124a2c0 process=0xffff800021291938 user=0xffff80002127c000, vmspace=0xfffffd8008a12910 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29847 152335 4078 0 3 0x80 nanoslp syz-executor.5 29847 509228 4078 0 3 0x4000080 fsleep syz-executor.5 29847 309097 4078 0 3 0x4000080 fsleep syz-executor.5 79455 84087 99451 0 3 0x82 nanoslp syz-executor.1 39632 287488 99451 0 3 0x82 piperd syz-executor.2 33429 326801 99451 0 3 0x82 piperd syz-executor.0 16486 216256 0 0 3 0x14200 acct acct 69975 276039 0 0 3 0x14280 nfsidl nfsio 13779 85759 0 0 3 0x14280 nfsidl nfsio 84834 100755 0 0 3 0x14280 nfsidl nfsio 89666 2955 0 0 3 0x14280 nfsidl nfsio 93857 9887 0 0 3 0x14280 nfsidl nfsio 41260 174364 0 0 3 0x14280 nfsidl nfsio 49326 520317 0 0 3 0x14280 nfsidl nfsio 8030 510446 0 0 3 0x14280 nfsidl nfsio 94123 264489 0 0 3 0x14280 nfsidl nfsio 4144 155189 0 0 3 0x14280 nfsidl nfsio 62973 213321 0 0 3 0x14280 nfsidl nfsio 72006 181530 0 0 3 0x14280 nfsidl nfsio 72276 348112 0 0 3 0x14280 nfsidl nfsio 1803 138481 0 0 3 0x14280 nfsidl nfsio 17989 429037 0 0 3 0x14280 nfsidl nfsio 71063 303210 0 0 3 0x14280 nfsidl nfsio 79440 413370 0 0 3 0x14280 nfsidl nfsio 19896 375846 0 0 3 0x14280 nfsidl nfsio 91447 178124 0 0 3 0x14280 nfsidl nfsio 63434 297437 0 0 3 0x14280 nfsidl nfsio 59354 291286 0 0 3 0x14200 bored sosplice 96606 31917 99451 0 3 0x82 piperd syz-executor.3 1001 146672 99451 0 3 0x2 biowait syz-executor.7 30822 507620 99451 0 3 0x82 nanoslp syz-executor.6 44663 145952 99451 0 3 0x82 nanoslp syz-executor.4 4078 8784 99451 0 3 0x82 nanoslp syz-executor.5 99451 400771 96871 0 3 0x2000082 wait syz-fuzzer 99451 343143 96871 0 3 0x6000082 nanoslp syz-fuzzer 99451 469310 96871 0 3 0x6000082 wait syz-fuzzer 99451 27599 96871 0 3 0x6000082 wait syz-fuzzer 99451 428929 96871 0 3 0x6000082 wait syz-fuzzer 99451 289173 96871 0 3 0x6000082 thrsleep syz-fuzzer 99451 300812 96871 0 3 0x6000082 wait syz-fuzzer 99451 191131 96871 0 3 0x6000082 kqread syz-fuzzer 99451 154824 96871 0 3 0x6000082 wait syz-fuzzer 99451 370284 96871 0 3 0x6000082 thrsleep syz-fuzzer 99451 489143 96871 0 3 0x6000082 thrsleep syz-fuzzer 99451 508326 96871 0 3 0x6000082 wait syz-fuzzer 99451 128596 96871 0 3 0x6000082 wait syz-fuzzer 99451 324302 96871 0 3 0x6000082 thrsleep syz-fuzzer 99451 103856 96871 0 3 0x6000082 thrsleep syz-fuzzer 99451 6065 96871 0 3 0x6000082 thrsleep syz-fuzzer 96871 213846 97512 0 3 0x10008a sigsusp ksh 97512 429756 80907 0 3 0x9a kqread sshd 79806 502307 1 0 3 0x100083 ttyin getty 80907 222182 1 0 3 0x88 kqread sshd 23826 132021 37440 74 3 0x1100092 bpf pflogd 37440 238017 1 0 3 0x80 netio pflogd 99668 185733 4179 73 3 0x1100090 kqread syslogd 4179 16122 1 0 3 0x100082 netio syslogd 42948 388889 1 0 3 0x100080 kqread resolvd 47310 189742 1507 77 3 0x100092 kqread dhcpleased 79943 93952 1507 77 3 0x100092 kqread dhcpleased 1507 264357 1 0 3 0x80 kqread dhcpleased 76132 493580 0 0 3 0x14200 bored smr 80572 451387 0 0 3 0x14200 pgzero zerothread 3060 176114 0 0 3 0x14200 aiodoned aiodoned 38523 455923 0 0 3 0x14200 syncer update 50023 162551 0 0 3 0x14200 cleaner cleaner 85035 208061 0 0 2 0x14200 reaper 25213 51232 0 0 3 0x14200 pgdaemon pagedaemon 86917 481995 0 0 3 0x14200 bored viomb 24152 509173 0 0 3 0x40014200 acpi0 acpi0 97714 490261 0 0 3 0x40014200 idle1 51996 111012 0 0 3 0x14200 bored softnet3 65897 147170 0 0 3 0x14200 bored softnet2 73255 135300 0 0 3 0x14200 bored softnet1 2111 323230 0 0 3 0x14200 bored softnet0 11221 318092 0 0 3 0x14200 bored systqmp 39626 217184 0 0 3 0x14200 bored systq 78787 521376 0 0 3 0x40014200 bored softclock 30880 145499 0 0 7 0x40014200 idle0 1 388223 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 (0xffffffff82d8c2e8) #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 1001 (syz-executor.7) thread 0xffff80002124a008 (146672) exclusive rrwlock inode r = 0 (0xfffffd806bd083d8) #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 (0xfffffd80647f3818) #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 10230 6674K 7713K 78643K 41258 0 pcb 13 13K 15K 78643K 210 0 rtable 241 7K 7K 78643K 588 0 pf 35 10K 10K 78643K 104 0 ifaddr 46 16K 16K 78643K 94 0 ifgroup 60 2K 2K 78643K 148 0 sysctl 2 0K 0K 78643K 6 0 counters 62 36K 36K 78643K 116 0 ioctlops 0 0K 4K 78643K 1532 0 iov 0 0K 16K 78643K 305 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1410 88K 88K 78643K 7872 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 59 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 125 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 12 41K 89K 78643K 5841 0 sigio 0 0K 0K 78643K 59 0 proc 69 91K 115K 78643K 875 0 subproc 104 6K 6K 78643K 169 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 152 0 in_multi 99 7K 7K 78643K 181 0 ether_multi 1 0K 0K 78643K 6 0 mrt 0 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 1K 78643K 862 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 351 93K 98K 78643K 57579 0 UVM aobj 131 4K 4K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 141 0 NDP 13 0K 1K 78643K 66 0 temp 74 5920K 6000K 78643K 32935 0 kqueue 12 18K 27K 78643K 255 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 120 259 0 256 5 4 1 3 0 8 0 rtentry 112 187 0 75 4 0 4 4 0 8 0 unpcb 144 1432 0 1417 14 13 1 6 0 8 0 syncache 304 43 0 43 8 7 1 1 0 8 1 tcpqe 32 236 0 236 6 5 1 1 0 8 1 tcpcb 808 1763 0 1750 69 55 14 14 0 8 12 arp 120 30 0 12 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 2971 0 2956 60 47 13 13 0 8 11 nd6 136 42 0 16 1 0 1 1 0 8 0 pkpcb 40 9 0 9 2 2 0 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 ppxss 1256 12 0 12 3 3 0 1 0 8 0 pffrag 232 50 0 49 3 2 1 1 0 482 0 pffrnode 88 14 0 13 3 2 1 1 0 8 0 pffrent 40 106 0 105 3 2 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 24 124 0 108 1 0 1 1 0 8 0 pfstkey 128 124 0 108 1 0 1 1 0 8 0 pfstate 376 124 0 108 5 3 2 4 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 256 697 0 229 30 0 30 30 0 8 0 art_table 32 698 0 229 4 0 4 4 0 8 0 art_node 16 170 0 68 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 3 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 118 0 108 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8659 0 7186 94 1 93 93 0 8 0 ffsino 272 8659 0 7186 99 0 99 99 0 8 0 nchpl 144 19031 0 17387 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 53153 0 53152 9 8 1 2 0 8 0 percpumem 16 71 0 27 1 0 1 1 0 8 0 vmpool 696 3 0 3 1 1 0 1 0 8 0 kstatmem 264 80 0 54 2 0 2 2 0 8 0 scxspl 216 46819 0 46818 24 23 1 8 1 8 0 plimitpl 152 474 0 458 1 0 1 1 0 8 0 sigapl 424 6164 0 6098 10 2 8 8 0 8 0 futexpl 64 66602 0 66600 1 0 1 1 0 8 0 knotepl 120 302 0 0 7 0 7 7 0 8 0 kqueuepl 216 531 0 523 8 7 1 5 0 8 0 pipepl 320 1207 0 1179 48 45 3 8 0 8 0 fdescpl 496 6125 0 6100 6 2 4 5 0 8 0 filepl 152 29890 0 29648 89 74 15 23 0 8 5 lockfpl 104 2468 0 2466 4 3 1 2 0 8 0 lockfspl 48 1181 0 1179 1 0 1 1 0 8 0 sessionpl 144 29 0 12 1 0 1 1 0 8 0 pgrppl 48 37 0 20 1 0 1 1 0 8 0 ucredpl 104 3533 0 3519 1 0 1 1 0 8 0 zombiepl 144 6101 0 6098 2 1 1 1 0 8 0 processpl 1072 6164 0 6098 5 0 5 5 0 8 0 procpl 680 15587 0 15503 20 11 9 9 0 8 1 sosppl 168 23 0 22 5 4 1 1 0 8 0 sockpl 488 4672 0 4638 125 104 21 29 0 8 16 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 15 0 0 2 0 2 2 0 8 0 mcl12k 12288 21 0 0 2 0 2 2 0 8 0 mcl9k 9216 13 0 0 1 0 1 1 0 8 0 mcl8k 8192 28 0 0 4 1 3 3 0 8 0 mcl4k 4096 26 0 0 3 0 3 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 366 0 0 30 0 30 30 0 8 0 mtagpl 96 2106 0 0 50 0 50 50 0 8 0 mbufpl 256 2543 0 0 154 0 154 154 0 8 0 bufpl 288 12162 0 5833 453 0 453 453 0 8 0 anonpl 24 686578 0 672850 195 97 98 110 0 186 0 amapchunkpl 152 180648 0 179824 54 15 39 41 0 158 0 amappl16 200 15773 0 15399 92 71 21 34 0 8 0 amappl15 192 13 0 13 1 1 0 1 0 8 0 amappl14 184 189 0 169 3 1 2 2 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 6927 0 6897 3 1 2 2 0 8 0 amappl11 160 58 0 43 1 0 1 1 0 8 0 amappl10 152 45 0 33 2 1 1 1 0 8 0 amappl9 144 210 0 210 3 3 0 1 0 8 0 amappl8 136 345 0 254 4 0 4 4 0 8 0 amappl7 128 92 0 75 2 0 2 2 0 8 0 amappl6 120 313 0 292 2 1 1 2 0 8 0 amappl5 112 254 0 242 1 0 1 1 0 8 0 amappl4 104 676 0 634 3 1 2 3 0 8 0 amappl3 96 36118 0 36049 4 1 3 3 0 8 0 amappl2 88 6579 0 6509 3 1 2 3 0 8 0 amappl1 80 30963 0 30423 23 11 12 23 0 8 0 amappl 88 56873 0 56656 8 1 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 6128 0 6103 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6128 0 6103 1 0 1 1 0 8 0 vmmpekpl 168 49204 0 49141 5 1 4 4 0 8 0 vmmpepl 168 375754 0 373603 220 112 108 127 0 357 0 vmsppl 464 6127 0 6103 5 1 4 5 0 8 0 rwobjpl 56 99446 0 91911 118 8 110 111 0 8 0 pdppl 4096 12264 0 12206 416 346 70 82 0 8 12 pvpl 32 1789304 0 1769857 475 302 173 364 0 265 0 pmappl 248 6127 0 6103 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1456 0 474 29 0 29 29 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+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cbdb20) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002116f8c0,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 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 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82bc2ff0) at sched_idle+0x41e sys/kern/kern_sched.c:188 end trace frame: 0x0, count: 3 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+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cbdb20) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002116f8c0,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 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 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82bc2ff0) at sched_idle+0x41e sys/kern/kern_sched.c:188 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(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(825afe3d) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f1e8af8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f1e8af8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff8000211d97e8,fffffd806f1e8af8,fffffd806f1e8b80,0,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000211d97e8,0) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000211d97e8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000211d97e8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000211d97e8,ffff800021281350,ffff8000212813a0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800021281420) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021281420) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78770f018aa0, 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(825afe3d) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f1e8af8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f1e8af8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff8000211d97e8,fffffd806f1e8af8,fffffd806f1e8b80,0,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000211d97e8,0) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000211d97e8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000211d97e8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000211d97e8,ffff800021281350,ffff8000212813a0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800021281420) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021281420) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78770f018aa0, count: -13