login: panic: timeout_add: to_ticks (-973078528) < 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *103427 70530 0 0x2 0 0K syz-executor0986 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x174 sys/kern/subr_prf.c:208 timeout_add(ffff80000066d060,c6000000) at timeout_add+0x194 sys/kern/kern_timeout.c:190 pcppi_bell(ffff80000066d000,2,c6000000,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800020baf9a0,46,ffff800020b95780) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800020baf9a0,46,ffff800020b95780) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd806dc86328,20005302,ffff800020baf9a0,46,fffffd807f7c7ba0,ffff800020b95780) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806fcae260,20005302,ffff800020baf9a0,ffff800020b95780) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b95780,ffff800020bafae8,ffff800020bafad0) at sys_ioctl+0x646 syscall(ffff800020bafb80) at syscall+0x5ac mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bafb80) at syscall+0x5ac sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,7f7ffffdec48,0,1,7f7ffffdec58) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdebe0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic timeout_add: to_ticks (-973078528) < 0 ddb{0}> trace db_enter() at db_enter+24 panic() at panic+372 timeout_add(ffff80000066d060,c6000000) at timeout_add+404 pcppi_bell(ffff80000066d000,2,c6000000,1) at pcppi_bell+672 spkrioctl(1b00,20005302,ffff800020baf9a0,46,ffff800020b95780) at spkrioctl+560 VOP_IOCTL(fffffd806dc86328,20005302,ffff800020baf9a0,46,fffffd807f7c7ba0,ffff800020b95780) at VOP_IOCTL+154 vn_ioctl(fffffd806fcae260,20005302,ffff800020baf9a0,ffff800020b95780) at vn_ioctl+201 sys_ioctl(ffff800020b95780,ffff800020bafae8,ffff800020bafad0) at sys_ioctl+1606 syscall(ffff800020bafb80) at syscall+1452 Xsyscall(6,0,7f7ffffdec48,0,1,7f7ffffdec58) at Xsyscall+296 end of kernel end trace frame: 0x7f7ffffdebe0, count: -10 ddb{0}> show registers rdi 0 rsi 1 rbp 18446603336770319808 rbx 18446603336770319984 rdx 18446744071594908300 apollo_pio_rec+35292 rcx 513 rax 1 r8 18446744071585311987 kprintf+387 r9 1 r10 8073321489258217710 r11 7775153245688640304 r12 206158430216 r13 18446603336770319824 r14 256 r15 1 rip 18446744071590259448 db_enter+24 cs 8 rflags 582 rsp 18446603336770319792 ss 16 db_enter+24: addq $8,%rsp ddb{0}> show proc PROC (syz-executor0986) pid=103427 stat=onproc flags process=2 proc=0 pri=21, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020b94970,0xffffffff82353980 process=0xffff800020b7a018 user=0xffff800020baa000, vmspace=0xfffffd806e95a5a8 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *70530 103427 74615 0 7 0x2 syz-executor0986 74615 284793 91374 0 3 0x10008a pause ksh 91374 308416 64493 0 3 0x92 select sshd 95183 37558 1 0 3 0x100083 ttyin getty 64493 320702 1 0 3 0x80 select sshd 14554 101440 72992 73 3 0x100090 kqread syslogd 72992 65000 1 0 3 0x100082 netio syslogd 40962 182229 1 77 3 0x100090 poll dhclient 33046 507663 1 0 3 0x80 poll dhclient 15953 205988 0 0 3 0x14200 pgzero zerothread 7975 2125 0 0 3 0x14200 aiodoned aiodoned 21326 506135 0 0 3 0x14200 syncer update 38522 30894 0 0 3 0x14200 cleaner cleaner 63059 353185 0 0 3 0x14200 reaper reaper 80464 167060 0 0 3 0x14200 pgdaemon pagedaemon 921 444563 0 0 3 0x14200 bored crynlk 42974 379657 0 0 3 0x14200 bored crypto 80774 31187 0 0 3 0x40014200 acpi0 acpi0 84264 487940 0 0 7 0x40014200 idle1 52599 283775 0 0 3 0x14200 bored softnet 50024 455837 0 0 3 0x14200 bored systqmp 8743 432458 0 0 3 0x14200 bored systq 15091 285970 0 0 3 0x40014200 bored softclock 48248 102016 0 0 3 0x40014200 idle0 1 180601 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 70530 (syz-executor0986) thread 0xffff800020b95780 (103427) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82309fb0) locked @ /syzkaller/managers/multicore/kernel/sys/kern/sched_bsd.c:436 #0 witness_lock+1418 #1 ___mp_acquire_count+103 #2 mi_switch+944 #3 sleep_finish+272 #4 sleep_finish_all+52 #5 tsleep+444 #6 spkrioctl+609 #7 VOP_IOCTL+154 #8 vn_ioctl+201 #9 sys_ioctl+1606 #10 syscall+1452 #11 Xsyscall+296 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9443 6315K 6316K 78643K 10530 0 0 pcb 23 9K 9K 78643K 55 0 0 rtable 61 2K 2K 78643K 115 0 0 ifaddr 21 7K 7K 78643K 21 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 13 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1166 73K 73K 78643K 1172 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1792 194K 288K 78643K 12592 0 0 file desc 1 0K 0K 78643K 1 0 0 proc 40 38K 46K 78643K 207 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 11 0K 0K 78643K 11 0 0 ether_multi 1 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 18 79K 79K 78643K 18 0 0 exec 0 0K 1K 78643K 150 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 47 2K 3K 78643K 658 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 3 0K 0K 78643K 3 0 0 temp 30 2347K 2411K 78643K 1695 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 2 0 0 1 0 1 1 0 8 0 inpcbpl 280 22 0 16 1 0 1 1 0 8 0 plimitpl 152 13 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1383 0 18 45 0 45 45 0 8 0 ffsino 272 1383 0 18 92 0 92 92 0 8 0 nchpl 144 1555 0 30 57 0 57 57 0 8 0 uvmvnodes 72 1392 0 0 26 0 26 26 0 8 0 vnodes 200 1392 0 0 74 0 74 74 0 8 0 namei 1024 3262 0 3262 3 2 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 2359 0 2359 7 6 1 6 0 8 1 sigapl 432 174 0 164 2 0 2 2 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 104 1 0 0 1 0 1 1 0 8 0 pipepl 112 114 0 107 3 2 1 1 0 8 0 fdescpl 488 175 0 164 2 0 2 2 0 8 0 filepl 152 808 0 765 2 0 2 2 0 8 0 lockfpl 104 6 0 6 1 1 0 1 0 8 0 lockfspl 32 3 0 3 1 1 0 1 0 8 0 sessionpl 112 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 47 0 40 1 0 1 1 0 8 0 zombiepl 144 164 0 164 3 2 1 1 0 8 1 processpl 840 189 0 164 4 0 4 4 0 8 0 procpl 600 189 0 164 3 0 3 3 0 8 0 sockpl 384 64 0 48 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 64 0 0 8 0 8 8 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 98 0 0 5 0 5 5 0 8 0 bufpl 256 1998 0 254 109 0 109 109 0 8 0 anonpl 16 16943 0 15856 7 1 6 6 0 125 1 amapchunkpl 152 504 0 469 2 0 2 2 0 158 0 amappl16 192 68 0 63 1 0 1 1 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 1 0 1 1 1 0 1 0 8 0 amappl13 168 16 0 13 1 0 1 1 0 8 0 amappl12 160 7 0 7 2 1 1 1 0 8 1 amappl11 152 172 0 163 1 0 1 1 0 8 0 amappl10 144 43 0 43 3 2 1 1 0 8 1 amappl9 136 205 0 204 1 0 1 1 0 8 0 amappl8 128 109 0 103 1 0 1 1 0 8 0 amappl7 120 29 0 25 1 0 1 1 0 8 0 amappl6 112 43 0 38 1 0 1 1 0 8 0 amappl5 104 138 0 126 1 0 1 1 0 8 0 amappl4 96 253 0 234 1 0 1 1 0 8 0 amappl3 88 112 0 107 1 0 1 1 0 8 0 amappl2 80 559 0 525 1 0 1 1 0 8 0 amappl1 72 11702 0 11313 15 5 10 15 0 8 0 amappl 72 372 0 353 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 175 0 164 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 175 0 164 1 0 1 1 0 8 0 vmmpekpl 168 5136 0 5116 1 0 1 1 0 8 0 vmmpepl 168 23507 0 22819 54 20 34 43 0 357 3 vmsppl 360 174 0 164 2 0 2 2 0 8 0 pdppl 4096 357 0 328 5 0 5 5 0 8 0 pvpl 32 69588 0 66880 40 14 26 26 0 265 3 pmappl 224 174 0 164 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 236 0 4 7 0 7 7 0 8 0 ddb{0}>