panic: timeout_add: to_ticks (-1214708354) < 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *310468 46910 0 0 0x4000000 0 syz-executor.1 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,b799057e) at timeout_add+0x179 sys/kern/kern_timeout.c:190 pcppi_bell(ffff800000669200,aade3797,b799057e,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800014a0a080,2,ffff8000149b0bd0) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800014a0a080,2,ffff8000149b0bd0) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd803d83cd70,20005302,ffff800014a0a080,2,fffffd803f7c7ae0,ffff8000149b0bd0) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd802fe96e20,20005302,ffff800014a0a080,ffff8000149b0bd0) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff8000149b0bd0,ffff800014a0a1c8,ffff800014a0a1b0) at sys_ioctl+0x62d syscall(ffff800014a0a260) at syscall+0x535 Xsyscall(6,0,ffffffffffffff88,0,3,154efab2010) at Xsyscall+0x128 end of kernel end trace frame: 0x157840e33e0, 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 (-1214708354) < 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,b799057e) at timeout_add+0x179 sys/kern/kern_timeout.c:190 pcppi_bell(ffff800000669200,aade3797,b799057e,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800014a0a080,2,ffff8000149b0bd0) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800014a0a080,2,ffff8000149b0bd0) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd803d83cd70,20005302,ffff800014a0a080,2,fffffd803f7c7ae0,ffff8000149b0bd0) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd802fe96e20,20005302,ffff800014a0a080,ffff8000149b0bd0) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff8000149b0bd0,ffff800014a0a1c8,ffff800014a0a1b0) at sys_ioctl+0x62d syscall(ffff800014a0a260) at syscall+0x535 Xsyscall(6,0,ffffffffffffff88,0,3,154efab2010) at Xsyscall+0x128 end of kernel end trace frame: 0x157840e33e0, count: -10 ddb> show registers rdi 0xffffffff814dfc97 db_enter+0x17 rsi 0x1595 __ALIGN_SIZE+0x595 rbp 0xffff800014a09ca0 rbx 0xffff800014a09d50 rdx 0x1596 __ALIGN_SIZE+0x596 rcx 0xffff800000938000 rax 0xffff800000938000 r8 0xffff800014a09c60 r9 0x1 r10 0xffff800000932e00 r11 0xbee201b30ebdcfc2 r12 0x3000000008 r13 0xffff800014a09cb0 r14 0x100 r15 0x1 rip 0xffffffff814dfc98 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800014a09c90 ss 0 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=310468 stat=onproc flags process=0 proc=4000000 pri=21, usrpri=65, nice=20 forw=0xffffffffffffffff, list=0xffff8000149b1530,0xffff8000149b0988 process=0xffff8000149a3718 user=0xffff800014a05000, vmspace=0xfffffd803f015c60 estcpu=30, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 86380 8119 44647 0 2 0 syz-executor.0 86380 22469 44647 0 3 0x4000080 fsleep syz-executor.0 46910 360315 53565 0 2 0 syz-executor.1 *46910 310468 53565 0 7 0x4000000 syz-executor.1 46910 192056 53565 0 2 0x4000000 syz-executor.1 88332 85602 1 0 3 0x100083 ttyin getty 10102 78781 0 0 3 0x14200 bored sosplice 44647 113085 19906 0 2 0x482 syz-executor.0 53565 31421 19906 0 3 0x82 nanosleep syz-executor.1 19906 112092 33771 0 3 0x82 thrsleep syz-fuzzer 19906 141500 33771 0 3 0x4000082 thrsleep syz-fuzzer 19906 143163 33771 0 3 0x4000082 thrsleep syz-fuzzer 19906 181511 33771 0 3 0x4000082 kqread syz-fuzzer 19906 314155 33771 0 3 0x4000082 thrsleep syz-fuzzer 19906 321832 33771 0 3 0x4000082 thrsleep syz-fuzzer 19906 97223 33771 0 3 0x4000082 thrsleep syz-fuzzer 19906 523214 33771 0 3 0x4000082 thrsleep syz-fuzzer 33771 290497 39566 0 3 0x10008a pause ksh 39566 489942 66563 0 3 0x92 select sshd 66563 281935 1 0 3 0x80 select sshd 12955 88555 5663 73 3 0x100090 kqread syslogd 5663 165438 1 0 3 0x100082 netio syslogd 10311 50968 1 77 3 0x100090 poll dhclient 51674 142664 1 0 3 0x80 poll dhclient 89680 43357 0 0 2 0x14200 zerothread 15745 398411 0 0 3 0x14200 aiodoned aiodoned 42238 62140 0 0 3 0x14200 syncer update 66958 231330 0 0 3 0x14200 cleaner cleaner 1250 187395 0 0 3 0x14200 reaper reaper 40551 369928 0 0 3 0x14200 pgdaemon pagedaemon 56035 306504 0 0 3 0x14200 bored crynlk 11929 336575 0 0 3 0x14200 bored crypto 90435 341511 0 0 3 0x40014200 acpi0 acpi0 66898 249285 0 0 3 0x14200 bored softnet 58320 4671 0 0 3 0x14200 bored systqmp 10441 276159 0 0 3 0x14200 bored systq 71724 73095 0 0 3 0x40014200 bored softclock 50205 94045 0 0 3 0x40014200 idle0 1 36301 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 9524 10453K 12502K 78643K 12136 0 0 pcb 27 9K 11K 78643K 2603 0 0 rtable 100 3K 3K 78643K 884 0 0 ifaddr 62 17K 19K 78643K 500 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 73 0 0 iov 0 0K 24K 78643K 668 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1181 74K 75K 78643K 4096 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 79 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 0K 0K 78643K 633 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1777 193K 286K 78643K 12501 0 0 file desc 6 17K 25K 78643K 4793 0 0 sigio 1 0K 0K 78643K 58 0 0 proc 43 30K 54K 78643K 898 0 0 subproc 64 65538K 69634K 78643K 82 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 670 0 0 in_multi 33 2K 2K 78643K 214 0 0 ether_multi 1 0K 0K 78643K 32 0 0 mrt 0 0K 0K 78643K 10 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 108 477K 477K 78643K 108 0 0 exec 0 0K 1K 78643K 711 0 0 pfkey data 0 0K 0K 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 98 21K 39K 78643K 12509 0 0 UVM aobj 130 9K 9K 78643K 142 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 205 0 0 NDP 13 0K 0K 78643K 133 0 0 temp 179 2347K 2419K 78643K 15768 0 0 kqueue 0 0K 0K 78643K 42 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 2396 0 2389 1 0 1 1 0 8 0 plimitpl 152 72 0 65 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 tcpqe 32 5 0 5 1 1 0 1 0 8 0 tcpcb 544 814 0 810 1 0 1 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 101 0 100 22 21 1 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 21 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 629 0 619 1 0 1 1 0 8 0 shmpl 112 140 0 12 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 10746 0 9264 48 0 48 48 0 8 0 ffsino 240 10746 0 9264 89 1 88 88 0 8 0 nchpl 144 17960 0 16343 61 0 61 61 0 8 0 uvmvnodes 72 6530 0 0 119 0 119 119 0 8 0 vnodes 200 6530 0 0 344 0 344 344 0 8 0 namei 1024 57356 0 57356 1 0 1 1 0 8 1 scsiplug 64 13 0 13 11 11 0 1 0 8 0 scxspl 192 61123 0 61123 20 19 1 6 0 8 1 sigapl 432 4966 0 4952 2 0 2 2 0 8 0 futexpl 56 80110 0 80109 1 0 1 1 0 8 0 knotepl 112 1286 0 1259 10 8 2 2 0 8 1 kqueuepl 104 1573 0 1571 1 0 1 1 0 8 0 pipepl 112 3366 0 3347 15 14 1 2 0 8 0 fdescpl 424 4967 0 4952 2 0 2 2 0 8 0 filepl 120 32622 0 32522 8 4 4 5 0 8 0 lockfpl 104 1937 0 1936 4 3 1 1 0 8 0 lockfspl 32 2843 0 2842 3 2 1 1 0 8 0 sessionpl 112 22 0 12 1 0 1 1 0 8 0 pgrppl 48 73 0 63 1 0 1 1 0 8 0 ucredpl 96 9837 0 9830 1 0 1 1 0 8 0 zombiepl 144 4952 0 4952 2 1 1 1 0 8 1 processpl 840 4981 0 4952 5 1 4 4 0 8 0 procpl 600 11706 0 11667 5 1 4 5 0 8 0 sosppl 128 81 0 81 21 21 0 1 0 8 0 sockpl 384 4677 0 4656 7 4 3 4 0 8 0 mcl64k 65536 3495 0 3495 289 288 1 65 0 8 1 mcl16k 16384 24 0 24 17 17 0 1 0 8 0 mcl12k 12288 93 0 93 20 19 1 1 0 8 1 mcl9k 9216 90 0 90 23 22 1 1 0 8 1 mcl8k 8192 89 0 89 23 22 1 1 0 8 1 mcl4k 4096 241 0 241 11 10 1 1 0 8 1 mcl2k2 2112 48 0 48 14 13 1 1 0 8 1 mcl2k 2048 50437 0 50404 11 6 5 9 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 108580 0 108522 154 148 6 36 0 8 0 bufpl 256 18220 0 11690 409 0 409 409 0 8 0 anonpl 16 510425 0 502224 220 170 50 50 0 62 14 amapchunkpl 152 22221 0 22139 75 70 5 14 0 158 1 amappl16 192 29867 0 29430 228 197 31 34 0 8 8 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 2378 0 2375 2 1 1 1 0 8 0 amappl13 168 2431 0 2426 1 0 1 1 0 8 0 amappl12 160 5 0 5 1 1 0 1 0 8 0 amappl11 152 179 0 170 1 0 1 1 0 8 0 amappl10 144 63 0 60 2 1 1 1 0 8 0 amappl9 136 295 0 290 1 0 1 1 0 8 0 amappl8 128 186 0 150 2 0 2 2 0 8 0 amappl7 120 2446 0 2439 1 0 1 1 0 8 0 amappl6 112 2416 0 2409 1 0 1 1 0 8 0 amappl5 104 295 0 284 1 0 1 1 0 8 0 amappl4 96 337 0 315 2 1 1 2 0 8 0 amappl3 88 343 0 338 1 0 1 1 0 8 0 amappl2 80 48397 0 48338 2 0 2 2 0 8 0 amappl1 72 96296 0 95861 26 17 9 19 0 8 0 amappl 72 11964 0 11931 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 64 141 0 12 3 0 3 3 0 8 0 uaddrrnd 24 4967 0 4952 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4967 0 4952 1 0 1 1 0 8 0 vmmpekpl 168 40497 0 40475 2 0 2 2 0 8 0 vmmpepl 168 513773 0 512294 194 118 76 76 0 357 8 vmsppl 264 4966 0 4952 2 1 1 2 0 8 0 pdppl 4096 9940 0 9904 6 1 5 6 0 8 0 pvpl 32 1701119 0 1689811 512 383 129 221 0 265 37 pmappl 192 4966 0 4952 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 1029 0 495 18 1 17 18 0 8 0