panic: timeout_add: to_ticks (-1167314585) < 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *329429 55095 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,ba6c3167) at timeout_add+0x179 sys/kern/kern_timeout.c:190 pcppi_bell(ffff800000669200,a7dac5bc,ba6c3167,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800014a2bee0,2,ffff80001495cbc8) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800014a2bee0,2,ffff80001495cbc8) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd80390c99d8,20005302,ffff800014a2bee0,2,fffffd803f7c7960,ffff80001495cbc8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd802ff4fda8,20005302,ffff800014a2bee0,ffff80001495cbc8) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff80001495cbc8,ffff800014a2c028,ffff800014a2c010) at sys_ioctl+0x62d syscall(ffff800014a2c0c0) at syscall+0x535 Xsyscall(6,0,ffffffffffffff88,0,3,d729a5be010) at Xsyscall+0x128 end of kernel end trace frame: 0xd74ae4c3690, 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 (-1167314585) < 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,ba6c3167) at timeout_add+0x179 sys/kern/kern_timeout.c:190 pcppi_bell(ffff800000669200,a7dac5bc,ba6c3167,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800014a2bee0,2,ffff80001495cbc8) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800014a2bee0,2,ffff80001495cbc8) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd80390c99d8,20005302,ffff800014a2bee0,2,fffffd803f7c7960,ffff80001495cbc8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd802ff4fda8,20005302,ffff800014a2bee0,ffff80001495cbc8) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff80001495cbc8,ffff800014a2c028,ffff800014a2c010) at sys_ioctl+0x62d syscall(ffff800014a2c0c0) at syscall+0x535 Xsyscall(6,0,ffffffffffffff88,0,3,d729a5be010) at Xsyscall+0x128 end of kernel end trace frame: 0xd74ae4c3690, count: -10 ddb> show registers rdi 0xffffffff815c3ec7 db_enter+0x17 rsi 0x1797 __ALIGN_SIZE+0x797 rbp 0xffff800014a2bb00 rbx 0xffff800014a2bbb0 rdx 0x1798 __ALIGN_SIZE+0x798 rcx 0xffff800002b3a000 rax 0xffff800002b3a000 r8 0xffff800014a2bac0 r9 0x1 r10 0xffff800001938740 r11 0x86fb9a415ccd560f r12 0x3000000008 r13 0xffff800014a2bb10 r14 0x100 r15 0x1 rip 0xffffffff815c3ec8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800014a2baf0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=329429 stat=onproc flags process=0 proc=4000000 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80001495c970,0xffffffff8222df20 process=0xffff8000149a26b0 user=0xffff800014a27000, vmspace=0xfffffd803f014d68 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 55095 9023 62631 0 2 0 syz-executor.0 *55095 329429 62631 0 7 0x4000000 syz-executor.0 36692 139181 1 0 3 0x100083 ttyin getty 59877 102063 0 0 3 0x14200 bored sosplice 62631 320583 96852 0 3 0x82 nanosleep syz-executor.0 65792 194896 96852 0 3 0x82 nanosleep syz-executor.1 96852 157770 25967 0 3 0x82 thrsleep syz-fuzzer 96852 472879 25967 0 3 0x4000082 thrsleep syz-fuzzer 96852 116793 25967 0 3 0x4000082 thrsleep syz-fuzzer 96852 324382 25967 0 3 0x4000082 thrsleep syz-fuzzer 96852 105082 25967 0 3 0x4000082 thrsleep syz-fuzzer 96852 257553 25967 0 3 0x4000082 kqread syz-fuzzer 96852 104203 25967 0 3 0x4000082 thrsleep syz-fuzzer 96852 81154 25967 0 3 0x4000082 thrsleep syz-fuzzer 25967 247848 7895 0 3 0x10008a pause ksh 7895 344578 45480 0 3 0x92 select sshd 45480 149202 1 0 3 0x80 select sshd 89928 141960 97531 73 3 0x100090 kqread syslogd 97531 298937 1 0 3 0x100082 netio syslogd 11100 518340 1 77 3 0x100090 poll dhclient 78380 57793 1 0 3 0x80 poll dhclient 43491 136206 0 0 2 0x14200 zerothread 81904 337366 0 0 3 0x14200 aiodoned aiodoned 8957 428481 0 0 3 0x14200 syncer update 52419 300484 0 0 3 0x14200 cleaner cleaner 58342 183997 0 0 3 0x14200 reaper reaper 56965 47667 0 0 3 0x14200 pgdaemon pagedaemon 78706 426959 0 0 3 0x14200 bored crynlk 57692 58479 0 0 3 0x14200 bored crypto 75510 173564 0 0 3 0x40014200 acpi0 acpi0 68285 260789 0 0 3 0x14200 bored softnet 28254 84079 0 0 3 0x14200 bored systqmp 54821 77541 0 0 3 0x14200 bored systq 51264 296296 0 0 3 0x40014200 bored softclock 78660 363344 0 0 3 0x40014200 idle0 1 51817 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 9496 6337K 6352K 78643K 10891 0 0 pcb 23 9K 11K 78643K 600 0 0 rtable 100 3K 3K 78643K 259 0 0 ifaddr 51 12K 12K 78643K 97 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 23 0 0 iov 0 0K 16K 78643K 139 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1194 75K 75K 78643K 1837 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 12 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 0K 1K 78643K 126 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1777 193K 286K 78643K 12501 0 0 file desc 5 13K 25K 78643K 985 0 0 sigio 0 0K 0K 78643K 28 0 0 proc 42 30K 54K 78643K 414 0 0 subproc 64 65538K 69634K 78643K 70 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 180 0 0 in_multi 33 2K 2K 78643K 72 0 0 ether_multi 1 0K 0K 78643K 7 0 0 mrt 1 0K 0K 78643K 4 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 78 344K 344K 78643K 78 0 0 exec 0 0K 1K 78643K 287 0 0 pfkey data 0 0K 4K 78643K 2 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 79 20K 21K 78643K 3159 0 0 UVM aobj 52 4K 4K 78643K 66 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 38 0 0 NDP 10 0K 0K 78643K 26 0 0 temp 156 2343K 2409K 78643K 5354 0 0 kqueue 0 0K 0K 78643K 8 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 4 0 0 1 0 1 1 0 8 0 inpcbpl 280 511 0 504 1 0 1 1 0 8 0 plimitpl 152 29 0 22 1 0 1 1 0 8 0 rtentry 112 41 0 1 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 204 0 200 1 0 1 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 10 0 10 5 5 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 185 0 0 12 0 12 12 0 8 0 art_table 32 186 0 0 2 0 2 2 0 8 0 art_node 16 40 0 6 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 9 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 122 0 112 1 0 1 1 0 8 0 shmpl 112 64 0 14 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3331 0 1910 46 0 46 46 0 8 0 ffsino 240 3331 0 1910 84 0 84 84 0 8 0 nchpl 144 4966 0 3339 61 0 61 61 0 8 0 uvmvnodes 72 3481 0 0 64 0 64 64 0 8 0 vnodes 200 3481 0 0 184 0 184 184 0 8 0 namei 1024 14814 0 14814 3 2 1 1 0 8 1 scsiplug 64 2 0 2 2 2 0 1 0 8 0 scxspl 192 14202 0 14202 11 10 1 5 0 8 1 sigapl 432 1155 0 1142 2 0 2 2 0 8 0 futexpl 56 16397 0 16397 2 1 1 1 0 8 1 knotepl 112 245 0 218 2 1 1 2 0 8 0 kqueuepl 104 268 0 266 1 0 1 1 0 8 0 pipepl 112 850 0 831 5 3 2 2 0 8 1 fdescpl 424 1156 0 1142 2 0 2 2 0 8 0 filepl 120 7458 0 7360 5 0 5 5 0 8 2 lockfpl 104 332 0 330 3 2 1 1 0 8 0 lockfspl 32 532 0 530 3 2 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 49 0 39 1 0 1 1 0 8 0 ucredpl 96 2141 0 2134 1 0 1 1 0 8 0 zombiepl 144 1142 0 1141 2 1 1 1 0 8 0 processpl 840 1170 0 1141 5 1 4 4 0 8 0 procpl 600 2540 0 2503 5 1 4 4 0 8 1 sosppl 128 20 0 20 6 6 0 1 0 8 0 sockpl 384 1028 0 1011 6 2 4 4 0 8 2 mcl64k 65536 1272 0 1272 69 68 1 33 0 8 1 mcl16k 16384 2 0 2 2 2 0 1 0 8 0 mcl12k 12288 15 0 15 6 5 1 1 0 8 1 mcl9k 9216 20 0 20 6 5 1 1 0 8 1 mcl8k 8192 14 0 14 7 6 1 1 0 8 1 mcl4k 4096 62 0 62 5 4 1 1 0 8 1 mcl2k2 2112 2 0 2 2 1 1 1 0 8 1 mcl2k 2048 44437 0 44402 12 7 5 9 0 8 0 mtagpl 80 4 0 4 2 2 0 1 0 8 0 mbufpl 256 78118 0 78074 63 58 5 21 0 8 1 bufpl 256 7140 0 2900 266 0 266 266 0 8 0 anonpl 16 130981 0 122996 71 22 49 49 0 62 15 amapchunkpl 152 4663 0 4584 8 3 5 6 0 158 1 amappl16 192 7174 0 6749 69 39 30 34 0 8 8 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 6 0 5 2 1 1 1 0 8 0 amappl13 168 24 0 21 1 0 1 1 0 8 0 amappl12 160 496 0 494 2 1 1 1 0 8 0 amappl11 152 666 0 654 1 0 1 1 0 8 0 amappl10 144 59 0 58 2 1 1 1 0 8 0 amappl9 136 190 0 187 1 0 1 1 0 8 0 amappl8 128 624 0 604 1 0 1 1 0 8 0 amappl7 120 38 0 33 1 0 1 1 0 8 0 amappl6 112 54 0 47 1 0 1 1 0 8 0 amappl5 104 454 0 443 1 0 1 1 0 8 0 amappl4 96 282 0 257 1 0 1 1 0 8 0 amappl3 88 161 0 155 1 0 1 1 0 8 0 amappl2 80 10832 0 10780 2 0 2 2 0 8 0 amappl1 72 29846 0 29429 25 15 10 19 0 8 0 amappl 72 2761 0 2730 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 65 0 14 1 0 1 1 0 8 0 uaddrrnd 24 1156 0 1142 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1156 0 1142 1 0 1 1 0 8 0 vmmpekpl 168 12323 0 12303 2 0 2 2 0 8 0 vmmpepl 168 126349 0 124995 113 38 75 75 0 357 11 vmsppl 264 1155 0 1142 2 1 1 2 0 8 0 pdppl 4096 2318 0 2284 6 1 5 6 0 8 0 pvpl 32 363299 0 352362 173 43 130 131 0 265 40 pmappl 192 1155 0 1142 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 536 0 150 13 0 13 13 0 8 0