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 172498 32043 0 0x12 0x1 0 sshd db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a27e0) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828205b7,ffffffff827a9140,2bb,ffffffff827a0860) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(ef21a0c1) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806ef66e58) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806ef66e58) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff8000211f4d68,fffffd806ef66e58,fffffd806ef66ee0,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000211f4d68,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000211f4d68) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000211f4d68,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000211f4d68,ffff80002e4990c0,ffff80002e499110) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e499190) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e499190) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75468281c410, 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(ffffffff827a27e0) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828205b7,ffffffff827a9140,2bb,ffffffff827a0860) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(ef21a0c1) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806ef66e58) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806ef66e58) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff8000211f4d68,fffffd806ef66e58,fffffd806ef66ee0,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000211f4d68,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000211f4d68) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000211f4d68,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000211f4d68,ffff80002e4990c0,ffff80002e499110) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e499190) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e499190) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75468281c410, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e498d00 rbx 0xffff800020d59b9f rdx 0 rcx 0xffff8000211f4d68 rax 0xffff800020d58ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf1e25252f86f8461 r11 0x32f96f9233e1b9ba r12 0xffff800020d599a0 r13 0 r14 0 r15 0x1 rip 0xffffffff81698bbc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002e498cf0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=27633 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002c9ed800,0xffff8000211d8ab8 process=0xffff8000ffff6a00 user=0xffff80002e494000, vmspace=0xfffffd8069fa71e8 estcpu=36, cpticks=7, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55969 149189 30028 0 2 0 syz-executor.2 11762 344981 81672 0 2 0 syz-executor.5 44895 30863 75885 0 2 0 syz-executor.7 44895 206294 75885 0 3 0x4000080 netio syz-executor.7 44895 326261 75885 0 3 0x4000080 netio syz-executor.7 49751 375261 58415 0 2 0 syz-executor.6 49751 497776 58415 0 3 0x4000080 fsleep syz-executor.6 98890 359908 85411 0 3 0x2 biowait syz-executor.4 74392 184016 85411 0 3 0x82 nanoslp syz-executor.1 36210 195339 0 0 3 0x14280 nfsidl nfsio 28009 376514 0 0 3 0x14280 nfsidl nfsio 46589 442487 0 0 3 0x14280 nfsidl nfsio 70551 435288 0 0 3 0x14280 nfsidl nfsio 62769 484686 0 0 3 0x14280 nfsidl nfsio 77852 278643 0 0 3 0x14280 nfsidl nfsio 48019 482387 0 0 3 0x14280 nfsidl nfsio 49960 18916 0 0 3 0x14280 nfsidl nfsio 56156 307442 0 0 3 0x14280 nfsidl nfsio 6083 174519 0 0 3 0x14280 nfsidl nfsio 21897 471289 0 0 3 0x14280 nfsidl nfsio 42420 222968 0 0 3 0x14280 nfsidl nfsio 55474 490879 0 0 3 0x14280 nfsidl nfsio 61860 502790 0 0 3 0x14280 nfsidl nfsio 62955 338252 0 0 3 0x14280 nfsidl nfsio 76058 34789 0 0 3 0x14280 nfsidl nfsio 77724 225973 0 0 3 0x14280 nfsidl nfsio 5660 49399 0 0 3 0x14280 nfsidl nfsio 34672 113767 0 0 3 0x14280 nfsidl nfsio 9690 404338 0 0 3 0x14280 nfsidl nfsio 70726 444879 0 0 3 0x14200 bored sosplice 75885 258764 85411 0 3 0x82 nanoslp syz-executor.7 58415 423808 85411 0 3 0x82 nanoslp syz-executor.6 81672 109026 85411 0 3 0x82 nanoslp syz-executor.5 53739 111897 85411 0 2 0x2 syz-executor.3 30028 68446 85411 0 3 0x82 nanoslp syz-executor.2 62164 58872 85411 0 3 0x82 nanoslp syz-executor.0 85411 57482 70089 0 3 0x2000082 wait syz-fuzzer 85411 91719 70089 0 3 0x6000082 nanoslp syz-fuzzer 85411 506632 70089 0 3 0x6000082 wait syz-fuzzer 85411 403229 70089 0 3 0x6000082 thrsleep syz-fuzzer 85411 7342 70089 0 3 0x6000082 thrsleep syz-fuzzer 85411 116932 70089 0 3 0x6000082 wait syz-fuzzer 85411 319713 70089 0 3 0x6000082 thrsleep syz-fuzzer 85411 244922 70089 0 3 0x6000082 wait syz-fuzzer 85411 47247 70089 0 3 0x6000082 wait syz-fuzzer 85411 493491 70089 0 3 0x6000082 wait syz-fuzzer 85411 490457 70089 0 3 0x6000082 thrsleep syz-fuzzer 85411 475463 70089 0 3 0x6000082 wait syz-fuzzer 85411 17709 70089 0 3 0x6000082 kqread syz-fuzzer 85411 418212 70089 0 3 0x6000082 thrsleep syz-fuzzer 85411 161429 70089 0 3 0x6000082 wait syz-fuzzer 85411 255626 70089 0 2 0x6000002 syz-fuzzer 70089 378842 32043 0 3 0x10008a sigsusp ksh 32043 172498 3405 0 7 0x13 sshd 81647 470376 1 0 3 0x100083 ttyopn getty 3405 472879 1 0 3 0x88 kqread sshd 81057 236082 74495 74 3 0x1100092 bpf pflogd 74495 205376 1 0 3 0x80 netio pflogd 51551 162801 32842 73 3 0x1100090 kqread syslogd 32842 492444 1 0 3 0x100082 netio syslogd 97156 1078 1 0 3 0x100080 kqread resolvd 18253 58937 18540 77 3 0x100092 kqread dhcpleased 22740 491515 18540 77 3 0x100092 kqread dhcpleased 18540 434605 1 0 3 0x80 kqread dhcpleased 88744 119373 0 0 3 0x14200 bored smr 44508 247309 0 0 2 0x14200 zerothread 3036 233383 0 0 3 0x14200 aiodoned aiodoned 67778 422391 0 0 3 0x14200 syncer update 46672 375297 0 0 3 0x14200 cleaner cleaner 95035 411590 0 0 2 0x14200 reaper 20600 453289 0 0 3 0x14200 pgdaemon pagedaemon 2452 5400 0 0 3 0x14200 bored viomb 61484 463782 0 0 3 0x40014200 acpi0 acpi0 81772 15946 0 0 3 0x40014200 idle1 40031 265277 0 0 3 0x14200 bored softnet3 57577 508776 0 0 3 0x14200 bored softnet2 77046 432359 0 0 3 0x14200 bored softnet1 53166 482111 0 0 3 0x14200 bored softnet0 78433 61026 0 0 3 0x14200 bored systqmp 65396 229947 0 0 3 0x14200 bored systq 67949 394651 0 0 3 0x40014200 bored softclock 42475 94614 0 0 3 0x40014200 idle0 1 176374 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 98890 (syz-executor.4) thread 0xffff80002c9ec2c0 (359908) exclusive rrwlock inode r = 0 (0xfffffd80715e2e70) #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 (0xfffffd80715e22c0) #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 10199 6550K 7132K 78643K 12843 0 pcb 13 9K 10K 78643K 79 0 rtable 239 7K 7K 78643K 444 0 pf 32 9K 10K 78643K 78 0 ifaddr 45 15K 15K 78643K 68 0 ifgroup 55 2K 2K 78643K 112 0 counters 60 35K 36K 78643K 86 0 ioctlops 0 0K 4K 78643K 1649 0 iov 2 8K 12K 78643K 207 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1444 90K 90K 78643K 1807 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 12 0K 0K 78643K 324 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 93K 78643K 1082 0 sigio 0 0K 0K 78643K 103 0 proc 70 91K 115K 78643K 600 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 27 0 in_multi 99 7K 7K 78643K 126 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 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 462 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 340 86K 87K 78643K 13130 0 UVM aobj 8 2K 2K 78643K 8 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 6 0 NDP 12 0K 2K 78643K 45 0 temp 76 5924K 5988K 78643K 18646 0 kqueue 12 18K 24K 78643K 92 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 88 0 85 2 1 1 2 0 8 0 rtentry 112 137 0 26 4 0 4 4 0 8 0 unpcb 144 459 0 444 8 2 6 6 0 8 5 syncache 304 14 0 14 5 4 1 1 0 8 1 tcpqe 32 296 0 296 5 4 1 1 0 8 1 tcpcb 808 721 0 701 17 14 3 9 0 8 0 arp 120 22 0 4 1 0 1 1 0 8 0 inpcb 368 1009 0 984 22 13 9 9 0 8 6 nd6 136 31 0 6 1 0 1 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1256 2 0 2 1 1 0 1 0 8 0 pffrag 232 8 0 3 1 0 1 1 0 482 0 pffrnode 88 8 0 3 1 0 1 1 0 8 0 pffrent 40 29 0 24 1 0 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 37 0 27 1 0 1 1 0 8 0 pfstkey 128 37 0 27 1 0 1 1 0 8 0 pfstate 376 37 0 27 3 1 2 3 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 256 545 0 88 29 0 29 29 0 8 0 art_table 32 546 0 88 4 0 4 4 0 8 0 art_node 16 133 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 4 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 320 0 310 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2663 0 1209 92 0 92 92 0 8 0 ffsino 272 2663 0 1209 98 0 98 98 0 8 0 nchpl 144 4148 0 2495 63 0 63 63 0 8 0 uvmvnodes 80 3240 0 0 67 0 67 67 0 8 0 vnodes 216 3240 0 0 180 0 180 180 0 8 0 namei 1024 14459 0 14459 4 3 1 2 0 8 1 percpumem 16 56 0 13 1 0 1 1 0 8 0 vmpool 696 3 0 3 1 1 0 1 0 8 0 kstatmem 264 50 0 26 2 0 2 2 0 8 0 scxspl 216 13886 0 13884 13 12 1 8 1 8 0 plimitpl 152 155 0 139 1 0 1 1 0 8 0 sigapl 424 1424 0 1357 10 2 8 8 0 8 0 futexpl 64 7859 0 7858 1 0 1 1 0 8 0 knotepl 120 117 0 0 4 0 4 4 0 8 0 kqueuepl 216 159 0 151 3 2 1 3 0 8 0 pipepl 320 339 0 311 6 3 3 6 0 8 0 fdescpl 496 1386 0 1358 5 0 5 5 0 8 0 filepl 152 7575 0 7332 30 15 15 18 0 8 5 lockfpl 104 326 0 324 2 1 1 2 0 8 0 lockfspl 48 163 0 161 1 0 1 1 0 8 0 sessionpl 144 26 0 9 1 0 1 1 0 8 0 pgrppl 48 75 0 58 1 0 1 1 0 8 0 ucredpl 104 669 0 657 1 0 1 1 0 8 0 zombiepl 144 1359 0 1357 1 0 1 1 0 8 0 processpl 1072 1424 0 1357 5 0 5 5 0 8 0 procpl 680 3167 0 3081 13 4 9 9 0 8 1 sosppl 168 8 0 7 2 1 1 1 0 8 0 sockpl 488 1561 0 1518 38 24 14 21 0 8 8 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 14 0 0 2 0 2 2 0 8 0 mcl4k 4096 15 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 295 0 0 37 0 37 37 0 8 0 mtagpl 96 290 0 0 8 0 8 8 0 8 0 mbufpl 256 535 0 0 31 0 31 31 0 8 0 bufpl 288 5824 0 156 405 0 405 405 0 8 0 anonpl 24 288054 0 275742 133 42 91 129 0 186 0 amapchunkpl 152 41436 0 40563 40 2 38 39 0 158 1 amappl16 200 7791 0 7452 47 28 19 44 0 8 0 amappl15 192 9 0 8 1 0 1 1 0 8 0 amappl14 184 166 0 153 2 1 1 2 0 8 0 amappl13 176 10 0 9 1 0 1 1 0 8 0 amappl12 168 2087 0 2060 4 2 2 3 0 8 0 amappl11 160 54 0 38 1 0 1 1 0 8 0 amappl10 152 39 0 29 1 0 1 1 0 8 0 amappl9 144 192 0 192 4 4 0 1 0 8 0 amappl8 136 222 0 165 3 0 3 3 0 8 0 amappl7 128 74 0 59 2 1 1 2 0 8 0 amappl6 120 285 0 263 2 1 1 2 0 8 0 amappl5 112 197 0 186 1 0 1 1 0 8 0 amappl4 104 607 0 562 3 1 2 3 0 8 0 amappl3 96 8517 0 8437 5 2 3 3 0 8 0 amappl2 88 1674 0 1604 3 1 2 3 0 8 0 amappl1 80 13700 0 13152 23 10 13 23 0 8 0 amappl 88 12537 0 12310 6 0 6 6 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1389 0 1361 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1389 0 1361 1 0 1 1 0 8 0 vmmpekpl 168 16461 0 16400 3 0 3 3 0 8 0 vmmpepl 168 105152 0 102951 150 46 104 125 0 357 1 vmsppl 464 1388 0 1361 5 0 5 5 0 8 0 rwobjpl 56 36737 0 32058 70 3 67 67 0 8 0 pdppl 4096 2786 0 2722 170 100 70 84 0 8 6 pvpl 32 654477 0 636764 367 202 165 365 0 265 0 pmappl 248 1388 0 1361 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 934 0 137 23 0 23 23 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82ba6ff0) 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+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(ffffffff82cd0260) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cd0260) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff800021201240,ffff80000027b500) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc ktrgenio(ffff8000211b2d50,4,1,ffff8000006c9ff0,7764) at ktrgenio+0x1f8 sys/kern/kern_ktrace.c:257 dofilewritev(ffff8000211b2d50,4,ffff8000212014f8,0,ffff8000212015e0) at dofilewritev+0x39b sys/kern/sys_generic.c:396 sys_write(ffff8000211b2d50,ffff800021201590,ffff8000212015e0) at sys_write+0x87 sys/kern/sys_generic.c:295 syscall(ffff800021201660) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021201660) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76e30b2a42d0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff82ba6ff0) 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+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(ffffffff82cd0260) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cd0260) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff800021201240,ffff80000027b500) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc ktrgenio(ffff8000211b2d50,4,1,ffff8000006c9ff0,7764) at ktrgenio+0x1f8 sys/kern/kern_ktrace.c:257 dofilewritev(ffff8000211b2d50,4,ffff8000212014f8,0,ffff8000212015e0) at dofilewritev+0x39b sys/kern/sys_generic.c:396 sys_write(ffff8000211b2d50,ffff800021201590,ffff8000212015e0) at sys_write+0x87 sys/kern/sys_generic.c:295 syscall(ffff800021201660) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021201660) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76e30b2a42d0, 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(ffffffff827a27e0) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828205b7,ffffffff827a9140,2bb,ffffffff827a0860) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(ef21a0c1) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806ef66e58) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806ef66e58) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff8000211f4d68,fffffd806ef66e58,fffffd806ef66ee0,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000211f4d68,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000211f4d68) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000211f4d68,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000211f4d68,ffff80002e4990c0,ffff80002e499110) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e499190) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e499190) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75468281c410, count: 2 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a27e0) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828205b7,ffffffff827a9140,2bb,ffffffff827a0860) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(ef21a0c1) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806ef66e58) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806ef66e58) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff8000211f4d68,fffffd806ef66e58,fffffd806ef66ee0,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000211f4d68,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000211f4d68) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000211f4d68,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000211f4d68,ffff80002e4990c0,ffff80002e499110) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e499190) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e499190) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75468281c410, count: -13