panic: timeout_add: to_ticks (-1346894080) < 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *106849 91798 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,afb80700) at timeout_add+0x179 sys/kern/kern_timeout.c:190 pcppi_bell(ffff800000669200,6b555c84,afb80700,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800014a227b0,2,ffff8000149d2978) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800014a227b0,2,ffff8000149d2978) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd803de3fe78,20005302,ffff800014a227b0,2,fffffd803f7c78a0,ffff8000149d2978) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd803e43cb58,20005302,ffff800014a227b0,ffff8000149d2978) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff8000149d2978,ffff800014a228f8,ffff800014a228e0) at sys_ioctl+0x62d syscall(ffff800014a22990) at syscall+0x535 Xsyscall(6,0,ffffffffffffff88,0,3,2f4caa491a0) at Xsyscall+0x128 end of kernel end trace frame: 0x2f70cb11820, 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 (-1346894080) < 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,afb80700) at timeout_add+0x179 sys/kern/kern_timeout.c:190 pcppi_bell(ffff800000669200,6b555c84,afb80700,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800014a227b0,2,ffff8000149d2978) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800014a227b0,2,ffff8000149d2978) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd803de3fe78,20005302,ffff800014a227b0,2,fffffd803f7c78a0,ffff8000149d2978) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd803e43cb58,20005302,ffff800014a227b0,ffff8000149d2978) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff8000149d2978,ffff800014a228f8,ffff800014a228e0) at sys_ioctl+0x62d syscall(ffff800014a22990) at syscall+0x535 Xsyscall(6,0,ffffffffffffff88,0,3,2f4caa491a0) at Xsyscall+0x128 end of kernel end trace frame: 0x2f70cb11820, count: -10 ddb> show registers rdi 0xffffffff815b6c77 db_enter+0x17 rsi 0x1542 __ALIGN_SIZE+0x542 rbp 0xffff800014a223d0 rbx 0xffff800014a22480 rdx 0x1543 __ALIGN_SIZE+0x543 rcx 0xffff800000d39000 rax 0xffff800000d39000 r8 0xffff800014a22390 r9 0x1 r10 0xffff800000932e40 r11 0x64d152dec47f7fa2 r12 0x3000000008 r13 0xffff800014a223e0 r14 0x100 r15 0x1 rip 0xffffffff815b6c78 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800014a223c0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=106849 stat=onproc flags process=0 proc=4000000 pri=21, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff8000149d39e0,0xffff8000149d3798 process=0xffff8000149a3718 user=0xffff800014a1d000, vmspace=0xfffffd803f015e70 estcpu=25, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 91798 312844 93282 0 2 0 syz-executor.1 91798 43279 93282 0 3 0x4000080 ttyout syz-executor.1 91798 481959 93282 0 3 0x4000080 fsleep syz-executor.1 *91798 106849 93282 0 7 0x4000000 syz-executor.1 91798 68227 93282 0 2 0x4000000 syz-executor.1 31396 162491 1 0 3 0x100083 ttyin getty 48974 237173 0 0 3 0x14200 bored sosplice 40804 243728 22835 0 3 0x82 piperd syz-executor.0 93282 407282 22835 0 2 0x482 syz-executor.1 22835 273284 416 0 3 0x82 thrsleep syz-fuzzer 22835 279268 416 0 3 0x4000082 thrsleep syz-fuzzer 22835 159128 416 0 3 0x4000082 thrsleep syz-fuzzer 22835 169856 416 0 3 0x4000082 kqread syz-fuzzer 22835 508753 416 0 3 0x4000082 thrsleep syz-fuzzer 22835 457821 416 0 3 0x4000082 thrsleep syz-fuzzer 22835 470192 416 0 3 0x4000082 thrsleep syz-fuzzer 416 381625 83734 0 3 0x10008a pause ksh 83734 444500 85759 0 3 0x92 select sshd 85759 111962 1 0 3 0x80 select sshd 71846 180740 97702 73 3 0x100090 kqread syslogd 97702 462028 1 0 3 0x100082 netio syslogd 19354 138780 1 77 3 0x100090 poll dhclient 41969 233607 1 0 3 0x80 poll dhclient 56568 5663 0 0 2 0x14200 zerothread 98576 135097 0 0 3 0x14200 aiodoned aiodoned 79099 173959 0 0 3 0x14200 syncer update 30372 95591 0 0 3 0x14200 cleaner cleaner 84223 227040 0 0 3 0x14200 reaper reaper 87454 418582 0 0 3 0x14200 pgdaemon pagedaemon 87383 290235 0 0 3 0x14200 bored crynlk 58519 221892 0 0 3 0x14200 bored crypto 31005 101685 0 0 3 0x40014200 acpi0 acpi0 36695 37785 0 0 3 0x14200 bored softnet 50816 342879 0 0 3 0x14200 bored systqmp 46603 516742 0 0 3 0x14200 bored systq 57848 201850 0 0 3 0x40014200 bored softclock 5645 261660 0 0 3 0x40014200 idle0 1 71824 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 9483 6341K 6356K 78643K 10867 0 0 pcb 23 9K 10K 78643K 468 0 0 rtable 100 3K 3K 78643K 310 0 0 ifaddr 49 12K 13K 78643K 128 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 25 0 0 iov 0 0K 20K 78643K 102 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1192 75K 75K 78643K 1692 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 0K 78643K 88 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1777 193K 286K 78643K 12501 0 0 file desc 5 13K 25K 78643K 733 0 0 sigio 0 0K 0K 78643K 8 0 0 proc 42 30K 54K 78643K 364 0 0 subproc 64 65538K 67586K 78643K 69 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 84 0 0 in_multi 33 2K 2K 78643K 64 0 0 ether_multi 1 0K 0K 78643K 4 0 0 mrt 0 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 236 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 84 20K 21K 78643K 2571 0 0 UVM aobj 47 3K 3K 78643K 56 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 24 0 0 NDP 9 0K 0K 78643K 35 0 0 temp 149 2346K 2413K 78643K 4825 0 0 kqueue 0 0K 0K 78643K 13 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 280 361 0 354 1 0 1 1 0 8 0 plimitpl 152 18 0 11 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 13 0 13 1 1 0 1 0 8 0 tcpcb 544 136 0 132 1 0 1 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 17 0 17 3 3 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 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 84 0 74 1 0 1 1 0 8 0 shmpl 112 54 0 9 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2879 0 1471 46 0 46 46 0 8 0 ffsino 240 2879 0 1471 84 0 84 84 0 8 0 nchpl 144 4176 0 2553 61 0 61 61 0 8 0 uvmvnodes 72 2996 0 0 55 0 55 55 0 8 0 vnodes 200 2996 0 0 158 0 158 158 0 8 0 namei 1024 12086 0 12086 1 0 1 1 0 8 1 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 15905 0 15905 12 11 1 7 0 8 1 sigapl 432 902 0 889 2 0 2 2 0 8 0 futexpl 56 12361 0 12360 1 0 1 1 0 8 0 knotepl 112 235 0 208 2 0 2 2 0 8 0 kqueuepl 104 216 0 214 1 0 1 1 0 8 0 pipepl 112 526 0 507 3 2 1 2 0 8 0 fdescpl 424 903 0 889 2 0 2 2 0 8 0 filepl 120 5712 0 5609 4 0 4 4 0 8 0 lockfpl 104 224 0 223 2 1 1 1 0 8 0 lockfspl 32 350 0 349 2 1 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 28 0 18 1 0 1 1 0 8 0 ucredpl 96 1575 0 1568 1 0 1 1 0 8 0 zombiepl 144 889 0 889 2 1 1 1 0 8 1 processpl 840 917 0 889 5 1 4 4 0 8 0 procpl 600 1961 0 1923 4 0 4 4 0 8 0 sosppl 128 10 0 10 3 2 1 1 0 8 1 sockpl 384 758 0 741 3 0 3 3 0 8 1 mcl64k 65536 25 0 25 3 2 1 1 0 8 1 mcl16k 16384 4 0 4 4 3 1 1 0 8 1 mcl12k 12288 30 0 30 3 2 1 1 0 8 1 mcl9k 9216 18 0 18 4 3 1 1 0 8 1 mcl8k 8192 14 0 14 3 2 1 1 0 8 1 mcl4k 4096 36 0 36 4 3 1 1 0 8 1 mcl2k2 2112 5 0 5 2 2 0 1 0 8 0 mcl2k 2048 43901 0 43866 12 7 5 10 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 75458 0 75395 11 5 6 8 0 8 0 bufpl 256 6796 0 2545 266 0 266 266 0 8 0 anonpl 16 119658 0 111419 84 34 50 67 0 62 16 amapchunkpl 152 3828 0 3743 10 6 4 8 0 158 0 amappl16 192 5972 0 5529 79 44 35 47 0 8 12 amappl15 184 360 0 357 1 0 1 1 0 8 0 amappl14 176 361 0 359 2 1 1 1 0 8 0 amappl13 168 382 0 377 1 0 1 1 0 8 0 amappl12 160 6 0 6 2 2 0 1 0 8 0 amappl11 152 185 0 176 1 0 1 1 0 8 0 amappl10 144 56 0 55 1 0 1 1 0 8 0 amappl9 136 258 0 255 1 0 1 1 0 8 0 amappl8 128 143 0 122 1 0 1 1 0 8 0 amappl7 120 397 0 390 1 0 1 1 0 8 0 amappl6 112 409 0 402 1 0 1 1 0 8 0 amappl5 104 314 0 302 1 0 1 1 0 8 0 amappl4 96 277 0 255 1 0 1 1 0 8 0 amappl3 88 186 0 180 1 0 1 1 0 8 0 amappl2 80 7466 0 7417 2 0 2 2 0 8 0 amappl1 72 25954 0 25529 25 15 10 19 0 8 0 amappl 72 2172 0 2138 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 55 0 9 1 0 1 1 0 8 0 uaddrrnd 24 903 0 889 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 903 0 889 1 0 1 1 0 8 0 vmmpekpl 168 9818 0 9798 2 0 2 2 0 8 0 vmmpepl 168 110559 0 109178 111 35 76 85 0 357 12 vmsppl 264 902 0 889 2 1 1 2 0 8 0 pdppl 4096 1812 0 1778 6 1 5 6 0 8 0 pvpl 32 381160 0 369958 172 42 130 167 0 265 37 pmappl 192 902 0 889 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 413 0 25 12 0 12 12 0 8 0