panic: timeout_add: to_ticks (-1747414196) < 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *432399 24176 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x15c sys/kern/subr_prf.c:208 timeout_add(ffff800000669260,97d8934c) at timeout_add+0x179 sys/kern/kern_timeout.c:190 pcppi_bell(ffff800000669200,aeae016c,97d8934c,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800014a46260,2,ffff8000ffff5a10) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800014a46260,2,ffff8000ffff5a10) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd8036113d88,20005302,ffff800014a46260,2,fffffd803f7c7a80,ffff8000ffff5a10) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd802bc02540,20005302,ffff800014a46260,ffff8000ffff5a10) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff8000ffff5a10,ffff800014a463a8,ffff800014a46390) at sys_ioctl+0x62d syscall(ffff800014a46440) at syscall+0x535 Xsyscall(6,0,ffffffffffffff88,0,3,87f32a9b010) at Xsyscall+0x128 end of kernel end trace frame: 0x88155686df0, count: 5 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic timeout_add: to_ticks (-1747414196) < 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x15c sys/kern/subr_prf.c:208 timeout_add(ffff800000669260,97d8934c) at timeout_add+0x179 sys/kern/kern_timeout.c:190 pcppi_bell(ffff800000669200,aeae016c,97d8934c,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800014a46260,2,ffff8000ffff5a10) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800014a46260,2,ffff8000ffff5a10) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd8036113d88,20005302,ffff800014a46260,2,fffffd803f7c7a80,ffff8000ffff5a10) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd802bc02540,20005302,ffff800014a46260,ffff8000ffff5a10) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff8000ffff5a10,ffff800014a463a8,ffff800014a46390) at sys_ioctl+0x62d syscall(ffff800014a46440) at syscall+0x535 Xsyscall(6,0,ffffffffffffff88,0,3,87f32a9b010) at Xsyscall+0x128 end of kernel end trace frame: 0x88155686df0, count: -10 ddb> show registers rdi 0xffffffff814dfc97 db_enter+0x17 rsi 0x16a3 __ALIGN_SIZE+0x6a3 rbp 0xffff800014a45e80 rbx 0xffff800014a45f30 rdx 0x16a4 __ALIGN_SIZE+0x6a4 rcx 0xffff80000193a000 rax 0xffff80000193a000 r8 0xffff800014a45e40 r9 0x1 r10 0xffff800002d42740 r11 0x888e6d525f44512 r12 0x3000000008 r13 0xffff800014a45e90 r14 0x100 r15 0x1 rip 0xffffffff814dfc98 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800014a45e70 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=432399 stat=onproc flags process=0 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff49a8,0xffffffff8224fcc0 process=0xffff8000149b89f8 user=0xffff800014a41000, vmspace=0xfffffd803f015a50 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 24176 469432 1682 0 2 0 syz-executor.0 *24176 432399 1682 0 7 0x4000000 syz-executor.0 19560 122226 1 0 3 0x100083 ttyin getty 78363 381882 71093 0 3 0x2 biowait syz-executor.1 1682 371184 71093 0 3 0x82 nanosleep syz-executor.0 55823 167054 0 0 3 0x14200 bored sosplice 71093 228431 87579 0 3 0x82 thrsleep syz-fuzzer 71093 104345 87579 0 3 0x4000082 thrsleep syz-fuzzer 71093 1554 87579 0 3 0x4000082 thrsleep syz-fuzzer 71093 14225 87579 0 3 0x4000082 thrsleep syz-fuzzer 71093 75461 87579 0 3 0x4000082 kqread syz-fuzzer 71093 237128 87579 0 3 0x4000082 thrsleep syz-fuzzer 71093 230107 87579 0 3 0x4000082 thrsleep syz-fuzzer 71093 257170 87579 0 3 0x4000082 thrsleep syz-fuzzer 87579 142067 83144 0 3 0x10008a pause ksh 83144 342293 85487 0 3 0x92 select sshd 85487 454808 1 0 3 0x80 select sshd 30335 110303 22271 73 3 0x100090 kqread syslogd 22271 396189 1 0 3 0x100082 netio syslogd 14796 37990 1 77 3 0x100090 poll dhclient 4514 251611 1 0 3 0x80 poll dhclient 50929 196282 0 0 2 0x14200 zerothread 60398 186607 0 0 3 0x14200 aiodoned aiodoned 2423 24698 0 0 3 0x14200 syncer update 96872 90144 0 0 3 0x14200 cleaner cleaner 87954 381641 0 0 3 0x14200 reaper reaper 88133 481137 0 0 3 0x14200 pgdaemon pagedaemon 96613 428376 0 0 3 0x14200 bored crynlk 37822 467386 0 0 3 0x14200 bored crypto 8319 42623 0 0 3 0x40014200 acpi0 acpi0 21447 46315 0 0 3 0x14200 bored softnet 3850 131095 0 0 3 0x14200 bored systqmp 80159 9968 0 0 3 0x14200 bored systq 50930 165121 0 0 3 0x40014200 bored softclock 56319 81599 0 0 3 0x40014200 idle0 1 451561 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9544 8413K 8428K 78643K 14926 0 0 pcb 23 9K 11K 78643K 2158 0 0 rtable 100 3K 3K 78643K 4523 0 0 ifaddr 67 25K 33K 78643K 2216 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 52 0 0 iov 0 0K 28K 78643K 3136 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1183 74K 76K 78643K 12096 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 9K 78643K 220 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 11 1K 1K 78643K 19 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1777 193K 286K 78643K 12501 0 0 file desc 5 13K 17K 78643K 12171 0 0 sigio 0 0K 0K 78643K 58 0 0 proc 42 30K 54K 78643K 960 0 0 subproc 64 65538K 67586K 78643K 148 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 496 0 0 in_multi 33 2K 2K 78643K 267 0 0 ether_multi 1 0K 0K 78643K 24 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 144 636K 636K 78643K 144 0 0 exec 0 0K 1K 78643K 667 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 129 23K 40K 78643K 28344 0 0 UVM aobj 130 5K 5K 78643K 151 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 110 0 0 NDP 15 0K 0K 78643K 733 0 0 temp 192 2348K 2427K 78643K 35232 0 0 kqueue 0 0K 0K 78643K 24 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 2 1 0 1 1 0 8 0 inpcbpl 280 1830 0 1823 1 0 1 1 0 8 0 plimitpl 152 86 0 79 1 0 1 1 0 8 0 rtentry 112 59 0 19 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 9 0 9 3 3 0 1 0 8 0 tcpcb 544 596 0 592 1 0 1 1 0 8 0 nd6 48 8 0 4 1 0 1 1 0 8 0 ppxss 1128 693 0 691 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 277 0 89 12 0 12 12 0 8 0 art_table 32 278 0 89 2 0 2 2 0 8 0 art_node 16 58 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 19 1 0 1 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 149 0 21 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 30902 0 29441 48 0 48 48 0 8 0 ffsino 240 30902 0 29441 90 3 87 87 0 8 0 nchpl 144 46774 0 45167 61 0 61 61 0 8 0 uvmvnodes 72 6556 0 0 120 0 120 120 0 8 0 vnodes 200 6556 0 0 346 0 346 346 0 8 0 namei 1024 124825 0 124824 10 9 1 1 0 8 0 scsiplug 64 14 0 14 5 5 0 1 0 8 0 scxspl 192 167162 0 167161 21 20 1 6 0 8 0 sigapl 432 12345 0 12332 2 0 2 2 0 8 0 futexpl 56 127003 0 127003 11 10 1 1 0 8 1 knotepl 112 906 0 879 5 3 2 2 0 8 1 kqueuepl 104 1168 0 1166 1 0 1 1 0 8 0 pipepl 112 3502 0 3483 10 9 1 2 0 8 0 fdescpl 424 12346 0 12332 2 0 2 2 0 8 0 filepl 120 52886 0 52788 12 8 4 5 0 8 0 lockfpl 104 5509 0 5507 27 26 1 1 0 8 0 lockfspl 32 4263 0 4261 27 26 1 1 0 8 0 sessionpl 112 31 0 21 1 0 1 1 0 8 0 pgrppl 48 365 0 355 1 0 1 1 0 8 0 ucredpl 96 10935 0 10928 1 0 1 1 0 8 0 zombiepl 144 12332 0 12332 3 2 1 1 0 8 1 processpl 840 12360 0 12332 5 1 4 4 0 8 0 procpl 600 27436 0 27400 10 6 4 4 0 8 0 sosppl 128 74 0 74 15 15 0 1 0 8 0 sockpl 384 3762 0 3745 37 34 3 4 0 8 1 mcl64k 65536 2255 0 2255 215 209 6 33 0 8 6 mcl16k 16384 17 0 17 14 13 1 1 0 8 1 mcl12k 12288 279 0 279 43 42 1 1 0 8 1 mcl9k 9216 355 0 355 30 29 1 1 0 8 1 mcl8k 8192 80 0 80 32 32 0 1 0 8 0 mcl4k 4096 287 0 287 36 35 1 1 0 8 1 mcl2k2 2112 30 0 30 15 15 0 1 0 8 0 mcl2k 2048 36300 0 36254 101 93 8 12 0 8 1 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 138436 0 138384 128 123 5 22 0 8 0 bufpl 256 34631 0 28075 410 0 410 410 0 8 0 anonpl 16 1157178 0 1151689 240 216 24 46 0 62 0 amapchunkpl 152 59718 0 59639 117 113 4 96 0 158 0 amappl16 192 65405 0 65142 274 259 15 30 0 8 1 amappl15 184 6287 0 6283 1 0 1 1 0 8 0 amappl14 176 5988 0 5983 2 1 1 1 0 8 0 amappl13 168 33 0 30 1 0 1 1 0 8 0 amappl12 160 5561 0 5559 1 0 1 1 0 8 0 amappl11 152 194 0 185 1 0 1 1 0 8 0 amappl10 144 660 0 659 2 1 1 1 0 8 0 amappl9 136 33 0 30 1 0 1 1 0 8 0 amappl8 128 5812 0 5750 3 0 3 3 0 8 0 amappl7 120 44 0 37 1 0 1 1 0 8 0 amappl6 112 52 0 47 1 0 1 1 0 8 0 amappl5 104 7127 0 7113 1 0 1 1 0 8 0 amappl4 96 391 0 367 2 1 1 2 0 8 0 amappl3 88 522 0 517 1 0 1 1 0 8 0 amappl2 80 122138 0 122086 2 0 2 2 0 8 0 amappl1 72 201709 0 201301 25 15 10 19 0 8 0 amappl 72 27753 0 27722 1 0 1 1 0 75 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 150 0 21 3 0 3 3 0 8 0 uaddrrnd 24 12346 0 12332 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12346 0 12332 1 0 1 1 0 8 0 vmmpekpl 168 81707 0 81688 2 0 2 2 0 8 0 vmmpepl 168 1255826 0 1254587 255 195 60 72 0 357 1 vmsppl 264 12345 0 12332 1 0 1 1 0 8 0 pdppl 4096 24698 0 24664 5 0 5 5 0 8 0 pvpl 32 3791986 0 3783337 711 632 79 206 0 265 0 pmappl 192 12345 0 12332 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 1060 0 519 18 1 17 17 0 8 0