panic: timeout_add: to_ticks (-973078528) < 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *116339 74676 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,c6000000) at timeout_add+0x179 sys/kern/kern_timeout.c:190 pcppi_bell(ffff800000669200,20,c6000000,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,80085301,ffff800014a0c470,2,ffff8000ffff8260) at spkrioctl+0x123 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,80085301,ffff800014a0c470,2,ffff8000ffff8260) at spkrioctl+0x123 sys/dev/isa/spkr.c:489 VOP_IOCTL(fffffd802ac1ce48,80085301,ffff800014a0c470,2,fffffd803f7c7900,ffff8000ffff8260) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80361d99e0,80085301,ffff800014a0c470,ffff8000ffff8260) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff8000ffff8260,ffff800014a0c5b8,ffff800014a0c5a0) at sys_ioctl+0x62d syscall(ffff800014a0c650) at syscall+0x535 Xsyscall(6,0,ffffffffffffff88,0,3,aa62603c0d8) at Xsyscall+0x128 end of kernel end trace frame: 0xaa83eee2b40, 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 (-973078528) < 0 ddb> trace db_enter() at db_enter+24 panic() at panic+348 timeout_add(ffff800000669260,c6000000) at timeout_add+377 pcppi_bell(ffff800000669200,20,c6000000,1) at pcppi_bell+672 spkrioctl(1b00,80085301,ffff800014a0c470,2,ffff8000ffff8260) at spkrioctl+291 VOP_IOCTL(fffffd802ac1ce48,80085301,ffff800014a0c470,2,fffffd803f7c7900,ffff8000ffff8260) at VOP_IOCTL+154 vn_ioctl(fffffd80361d99e0,80085301,ffff800014a0c470,ffff8000ffff8260) at vn_ioctl+201 sys_ioctl(ffff8000ffff8260,ffff800014a0c5b8,ffff800014a0c5a0) at sys_ioctl+1581 syscall(ffff800014a0c650) at syscall+1333 Xsyscall(6,0,ffffffffffffff88,0,3,aa62603c0d8) at Xsyscall+296 end of kernel end trace frame: 0xaa83eee2b40, count: -10 ddb> show registers rdi 18446744071581504679 db_enter+23 rsi 5102 __ALIGN_SIZE+1006 rbp 18446603336567275664 rbx 18446603336567275840 rdx 5103 __ALIGN_SIZE+1007 rcx 18446603336232960000 rax 18446603336232960000 r8 18446603336567275600 r9 1 r10 18446603336247675648 r11 7298466768388800893 r12 206158430216 r13 18446603336567275680 r14 256 r15 1 rip 18446744071581504680 db_enter+24 cs 8 rflags 582 rsp 18446603336567275648 ss 16 db_enter+24: addq $8,%rsp ddb> show proc PROC (syz-executor.0) pid=116339 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8bc0,0xffff8000ffff8e28 process=0xffff8000149a2020 user=0xffff800014a07000, vmspace=0xfffffd803f015948 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 73664 35967 57740 0 2 0 syz-executor.1 73664 120205 57740 0 3 0x4000080 ttyout syz-executor.1 74676 339922 73402 0 2 0 syz-executor.0 74676 479280 73402 0 2 0x4000080 syz-executor.0 *74676 116339 73402 0 7 0x4000000 syz-executor.0 57740 172452 18114 0 3 0x82 nanosleep syz-executor.1 73402 293435 18114 0 3 0x82 nanosleep syz-executor.0 71026 388103 1 0 3 0x100083 ttyin getty 46268 251399 0 0 3 0x14200 bored sosplice 18114 512122 19099 0 3 0x82 thrsleep syz-fuzzer 18114 401207 19099 0 3 0x4000082 thrsleep syz-fuzzer 18114 185827 19099 0 3 0x4000082 thrsleep syz-fuzzer 18114 55191 19099 0 3 0x4000082 thrsleep syz-fuzzer 18114 450227 19099 0 3 0x4000082 thrsleep syz-fuzzer 18114 144679 19099 0 3 0x4000082 thrsleep syz-fuzzer 18114 499555 19099 0 3 0x4000082 thrsleep syz-fuzzer 18114 405247 19099 0 3 0x4000082 kqread syz-fuzzer 19099 307874 20117 0 3 0x10008a pause ksh 20117 78264 18609 0 3 0x92 select sshd 18609 512496 1 0 3 0x80 select sshd 89464 264851 60756 73 3 0x100090 kqread syslogd 60756 275454 1 0 3 0x100082 netio syslogd 2312 247535 1 77 3 0x100090 poll dhclient 57115 39999 1 0 3 0x80 poll dhclient 46836 405359 0 0 2 0x14200 zerothread 29701 479890 0 0 3 0x14200 aiodoned aiodoned 85168 450490 0 0 3 0x14200 syncer update 7985 457401 0 0 3 0x14200 cleaner cleaner 13812 178631 0 0 3 0x14200 reaper reaper 23930 165161 0 0 3 0x14200 pgdaemon pagedaemon 38800 163507 0 0 3 0x14200 bored crynlk 67000 390778 0 0 3 0x14200 bored crypto 43676 401100 0 0 3 0x40014200 acpi0 acpi0 69821 151104 0 0 3 0x14200 bored softnet 35485 205887 0 0 3 0x14200 bored systqmp 9514 273445 0 0 3 0x14200 bored systq 3041 381528 0 0 3 0x40014200 bored softclock 43895 41936 0 0 3 0x40014200 idle0 1 141350 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 9499 6348K 6356K 78643K 10962 0 0 pcb 23 9K 10K 78643K 569 0 0 rtable 100 3K 3K 78643K 334 0 0 ifaddr 52 12K 13K 78643K 122 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 27 0 0 iov 0 0K 24K 78643K 138 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1188 74K 75K 78643K 1914 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 20 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 0K 1K 78643K 159 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1777 193K 286K 78643K 12501 0 0 file desc 6 17K 25K 78643K 1105 0 0 sigio 0 0K 0K 78643K 12 0 0 proc 42 30K 54K 78643K 462 0 0 subproc 64 65538K 67586K 78643K 137 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 139 0 0 in_multi 33 2K 2K 78643K 83 0 0 ether_multi 1 0K 0K 78643K 3 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 102 450K 450K 78643K 102 0 0 exec 0 0K 1K 78643K 294 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 81 20K 25K 78643K 3492 0 0 UVM aobj 70 3K 3K 78643K 76 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 7 0 0 NDP 10 0K 0K 78643K 35 0 0 temp 155 2346K 2413K 78643K 5758 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 6 0 2 1 0 1 1 0 8 0 inpcbpl 280 446 0 439 1 0 1 1 0 8 0 plimitpl 152 33 0 26 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 tcpcb 544 146 0 142 1 0 1 1 0 8 0 nd6 48 8 0 4 1 0 1 1 0 8 0 ppxss 1128 12 0 12 6 6 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 278 0 89 12 0 12 12 0 8 0 art_table 32 279 0 89 2 0 2 2 0 8 0 art_node 16 58 0 24 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 112 157 0 147 1 0 1 1 0 8 0 shmpl 112 74 0 6 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3621 0 2201 46 0 46 46 0 8 0 ffsino 240 3621 0 2201 84 0 84 84 0 8 0 nchpl 144 5431 0 3818 61 0 61 61 0 8 0 uvmvnodes 72 3784 0 0 69 0 69 69 0 8 0 vnodes 200 3784 0 0 200 0 200 200 0 8 0 namei 1024 16141 0 16141 3 2 1 1 0 8 1 scxspl 192 20095 0 20095 16 15 1 6 0 8 1 sigapl 432 1270 0 1256 2 0 2 2 0 8 0 futexpl 56 17887 0 17887 3 2 1 1 0 8 1 knotepl 112 344 0 317 4 3 1 2 0 8 0 kqueuepl 104 287 0 285 1 0 1 1 0 8 0 pipepl 112 926 0 907 6 5 1 2 0 8 0 fdescpl 424 1271 0 1256 2 0 2 2 0 8 0 filepl 120 7875 0 7778 5 1 4 4 0 8 1 lockfpl 104 546 0 545 3 2 1 1 0 8 0 lockfspl 32 619 0 618 3 2 1 1 0 8 0 sessionpl 112 22 0 12 1 0 1 1 0 8 0 pgrppl 48 28 0 18 1 0 1 1 0 8 0 ucredpl 96 2099 0 2092 1 0 1 1 0 8 0 zombiepl 144 1256 0 1256 2 1 1 1 0 8 1 processpl 840 1285 0 1256 5 1 4 4 0 8 0 procpl 600 2797 0 2758 5 1 4 4 0 8 1 sosppl 128 10 0 10 5 5 0 1 0 8 0 sockpl 384 960 0 943 4 1 3 3 0 8 1 mcl64k 65536 509 0 509 37 37 0 33 0 8 0 mcl16k 16384 3 0 3 3 3 0 1 0 8 0 mcl12k 12288 26 0 26 9 9 0 1 0 8 0 mcl9k 9216 17 0 17 8 8 0 1 0 8 0 mcl8k 8192 23 0 23 5 5 0 1 0 8 0 mcl4k 4096 64 0 64 8 8 0 1 0 8 0 mcl2k2 2112 6 0 6 3 3 0 1 0 8 0 mcl2k 2048 43043 0 43009 11 6 5 10 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 75934 0 75831 28 20 8 21 0 8 0 bufpl 256 9056 0 3728 334 0 334 334 0 8 0 anonpl 16 142812 0 135026 86 52 34 51 0 62 0 amapchunkpl 152 5649 0 5565 20 16 4 14 0 158 0 amappl16 192 7434 0 7012 79 56 23 35 0 8 1 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 1101 0 1094 1 0 1 1 0 8 0 amappl12 160 18 0 17 1 0 1 1 0 8 0 amappl11 152 190 0 181 1 0 1 1 0 8 0 amappl10 144 67 0 65 2 1 1 1 0 8 0 amappl9 136 329 0 326 1 0 1 1 0 8 0 amappl8 128 150 0 129 1 0 1 1 0 8 0 amappl7 120 1037 0 1028 1 0 1 1 0 8 0 amappl6 112 52 0 46 1 0 1 1 0 8 0 amappl5 104 195 0 184 1 0 1 1 0 8 0 amappl4 96 371 0 347 1 0 1 1 0 8 0 amappl3 88 187 0 180 1 0 1 1 0 8 0 amappl2 80 11298 0 11237 2 0 2 2 0 8 0 amappl1 72 31812 0 31371 25 15 10 19 0 8 0 amappl 72 3056 0 3022 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 75 0 6 2 0 2 2 0 8 0 uaddrrnd 24 1271 0 1256 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1271 0 1256 1 0 1 1 0 8 0 vmmpekpl 168 12072 0 12052 2 0 2 2 0 8 0 vmmpepl 168 137162 0 135717 134 69 65 75 0 357 2 vmsppl 264 1270 0 1256 3 2 1 2 0 8 0 pdppl 4096 2548 0 2512 7 2 5 6 0 8 0 pvpl 32 475481 0 464554 301 114 187 233 0 265 96 pmappl 192 1270 0 1256 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 539 0 85 14 0 14 14 0 8 0