login: %load: 1.48 not panic: timeout_add: to_ticks (-1710663154) < 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *290781 74353 0 0 0x4000000 0K syz-executor.0 37455 54045 0 0x14000 0x200 1 reaper 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(ffff80000066d060,9a095a0e) at timeout_add+0x194 sys/kern/kern_timeout.c:190 pcppi_bell(ffff80000066d000,80efc8d2,9a095a0e,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800020bf3270,2,ffff800020b424c8) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800020bf3270,2,ffff800020b424c8) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd8067b7bc60,20005302,ffff800020bf3270,2,fffffd807f7c7ae0,ffff800020b424c8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80693e6578,20005302,ffff800020bf3270,ffff800020b424c8) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b424c8,ffff800020bf33b8,ffff800020bf33a0) at sys_ioctl+0x646 syscall(ffff800020bf3450) at syscall+0x5ac mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bf3450) at syscall+0x5ac sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff88,0,3,9261d795010) at Xsyscall+0x128 end of kernel end trace frame: 0x9283a5a41b0, 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 (-1710663154) < 0 ddb{0}> trace 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(ffff80000066d060,9a095a0e) at timeout_add+0x194 sys/kern/kern_timeout.c:190 pcppi_bell(ffff80000066d000,80efc8d2,9a095a0e,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800020bf3270,2,ffff800020b424c8) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800020bf3270,2,ffff800020b424c8) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd8067b7bc60,20005302,ffff800020bf3270,2,fffffd807f7c7ae0,ffff800020b424c8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80693e6578,20005302,ffff800020bf3270,ffff800020b424c8) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b424c8,ffff800020bf33b8,ffff800020bf33a0) at sys_ioctl+0x646 syscall(ffff800020bf3450) at syscall+0x5ac mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bf3450) at syscall+0x5ac sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff88,0,3,9261d795010) at Xsyscall+0x128 end of kernel end trace frame: 0x9283a5a41b0, count: -10 ddb{0}> show registers rdi 0xffffffff81264217 db_enter+0x17 rsi 0x463f __ALIGN_SIZE+0x363f rbp 0xffff800020bf2e90 rbx 0xffff800020bf2f40 rdx 0x4640 __ALIGN_SIZE+0x3640 rcx 0xffff800000947000 rax 0xffff800000947000 r8 0xffffffff81316553 kprintf+0x183 r9 0x1 r10 0x25 r11 0xe82012a66e3a10c4 r12 0x3000000008 r13 0xffff800020bf2ea0 r14 0x100 r15 0x1 rip 0xffffffff81264218 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bf2e80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=290781 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b42018,0xffffffff82334d38 process=0xffff800020b7b3c8 user=0xffff800020bee000, vmspace=0xfffffd807f00d708 estcpu=36, cpticks=3, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74353 341924 19303 0 2 0 syz-executor.0 *74353 290781 19303 0 7 0x4000000 syz-executor.0 53095 324003 1 0 3 0x80 nanosleep init 19303 337698 63911 0 3 0x82 nanosleep syz-executor.0 97642 228508 63911 0 3 0x82 nanosleep syz-executor.1 13528 202681 0 0 3 0x14200 bored sosplice 63911 357198 82527 0 3 0x82 thrsleep syz-fuzzer 63911 10065 82527 0 3 0x4000082 thrsleep syz-fuzzer 63911 207756 82527 0 3 0x4000082 thrsleep syz-fuzzer 63911 172687 82527 0 3 0x4000082 thrsleep syz-fuzzer 63911 422437 82527 0 3 0x4000082 thrsleep syz-fuzzer 63911 238265 82527 0 3 0x4000082 kqread syz-fuzzer 63911 296111 82527 0 3 0x4000082 thrsleep syz-fuzzer 63911 67066 82527 0 3 0x4000082 thrsleep syz-fuzzer 63911 469355 82527 0 3 0x4000082 thrsleep syz-fuzzer 63911 253067 82527 0 3 0x4000082 thrsleep syz-fuzzer 82527 400777 8632 0 3 0x10008a pause ksh 8632 76198 83549 0 3 0x92 select sshd 83549 318291 1 0 3 0x80 select sshd 15610 253247 85298 73 3 0x100090 kqread syslogd 85298 361869 1 0 3 0x100082 netio syslogd 78085 287143 1 77 3 0x100090 poll dhclient 14768 445866 1 0 3 0x80 poll dhclient 59437 403960 0 0 2 0x14200 zerothread 57838 396534 0 0 3 0x14200 aiodoned aiodoned 85223 166873 0 0 3 0x14200 syncer update 25320 52201 0 0 3 0x14200 cleaner cleaner 54045 37455 0 0 7 0x14200 reaper 42287 153991 0 0 3 0x14200 pgdaemon pagedaemon 18589 115111 0 0 3 0x14200 bored crynlk 19213 193524 0 0 3 0x14200 bored crypto 48674 481900 0 0 3 0x40014200 acpi0 acpi0 38348 202797 0 0 3 0x40014200 idle1 71757 47353 0 0 3 0x14200 bored softnet 93597 33098 0 0 3 0x14200 bored systqmp 10451 230973 0 0 3 0x14200 bored systq 59674 491949 0 0 3 0x40014200 bored softclock 33697 261871 0 0 3 0x40014200 idle0 1 412190 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 74353 (syz-executor.0) thread 0xffff800020b424c8 (290781) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8235c720) locked @ /syzkaller/managers/multicore/kernel/sys/arch/amd64/amd64/trap.c:161 #0 witness_lock+0x58a sys/kern/subr_witness.c:1205 #1 syscall+0x47f mi_syscall sys/sys/syscall_mi.h:91 [inline] #1 syscall+0x47f sys/arch/amd64/amd64/trap.c:574 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9533 14552K 14578K 78643K 11495 0 0 pcb 23 9K 11K 78643K 1422 0 0 rtable 100 3K 4K 78643K 731 0 0 ifaddr 58 14K 15K 78643K 280 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 50 0 0 iov 0 0K 32K 78643K 306 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1192 75K 76K 78643K 2962 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 43 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 336 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1792 194K 288K 78643K 12592 0 0 file desc 5 13K 25K 78643K 2708 0 0 sigio 0 0K 0K 78643K 53 0 0 proc 36 26K 70K 78643K 803 0 0 subproc 64 65538K 67586K 78643K 342 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 346 0 0 in_multi 33 2K 2K 78643K 218 0 0 ether_multi 1 0K 0K 78643K 16 0 0 mrt 0 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 96 424K 424K 78643K 96 0 0 exec 0 0K 1K 78643K 429 0 0 pfkey data 0 0K 0K 78643K 1 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 92 21K 30K 78643K 9638 0 0 UVM aobj 130 4K 4K 78643K 140 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 75 0 0 NDP 12 0K 0K 78643K 87 0 0 temp 170 2367K 2438K 78643K 10314 0 0 kqueue 0 0K 0K 78643K 34 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 12 0 8 1 0 1 1 0 8 0 inpcbpl 280 1272 0 1265 1 0 1 1 0 8 0 plimitpl 152 57 0 51 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 113 0 73 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 445 0 441 1 0 1 1 0 8 0 nd6 48 20 0 16 1 0 1 1 0 8 0 ppxss 1128 34 0 34 11 11 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 535 0 344 12 0 12 12 0 8 0 art_table 32 536 0 344 2 0 2 2 0 8 0 art_node 16 112 0 78 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 6 1 0 1 1 0 8 0 semapl 112 334 0 324 1 0 1 1 0 8 0 shmpl 112 138 0 10 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 6598 0 5149 47 0 47 47 0 8 0 ffsino 272 6598 0 5149 97 0 97 97 0 8 0 nchpl 144 10650 0 9038 61 0 61 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 200 5926 0 0 312 0 312 312 0 8 0 namei 1024 32760 0 32760 3 2 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 8 0 8 5 4 1 1 0 8 1 scxspl 192 33985 0 33985 21 20 1 6 0 8 1 sigapl 432 2857 0 2844 2 0 2 2 0 8 0 futexpl 56 32701 0 32701 2 1 1 1 0 8 1 knotepl 112 902 0 875 8 7 1 2 0 8 0 kqueuepl 104 852 0 850 1 0 1 1 0 8 0 pipepl 112 1970 0 1951 4 3 1 2 0 8 0 fdescpl 488 2858 0 2844 3 1 2 3 0 8 0 filepl 152 17909 0 17811 11 6 5 6 0 8 1 lockfpl 104 1089 0 1087 5 4 1 1 0 8 0 lockfspl 32 1467 0 1465 5 4 1 1 0 8 0 sessionpl 112 29 0 20 1 0 1 1 0 8 0 pgrppl 48 61 0 52 1 0 1 1 0 8 0 ucredpl 96 5060 0 5053 1 0 1 1 0 8 0 zombiepl 144 2844 0 2843 6 5 1 1 0 8 0 processpl 840 2873 0 2843 4 0 4 4 0 8 0 procpl 600 8777 0 8736 4 0 4 4 0 8 0 srpgc 64 48 0 48 2 2 0 1 0 8 0 sosppl 128 41 0 41 9 8 1 1 0 8 1 sockpl 384 2539 0 2522 9 6 3 4 0 8 1 mcl64k 65536 511 0 0 64 43 21 64 0 8 1 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 23 0 0 2 0 2 2 0 8 0 mcl9k 9216 14 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 16 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 138 0 0 14 0 14 14 0 8 0 mtagpl 80 2 0 0 1 0 1 1 0 8 0 mbufpl 256 596 0 0 37 0 37 37 0 8 0 bufpl 256 10897 0 3925 436 0 436 436 0 8 0 anonpl 16 305529 0 297244 178 136 42 49 0 125 7 amapchunkpl 152 17752 0 17655 47 42 5 9 0 158 0 amappl16 192 16154 0 15724 145 123 22 33 0 8 0 amappl15 184 8 0 7 1 0 1 1 0 8 0 amappl14 176 1497 0 1494 2 1 1 1 0 8 0 amappl13 168 44 0 41 1 0 1 1 0 8 0 amappl12 160 548 0 545 1 0 1 1 0 8 0 amappl11 152 814 0 803 1 0 1 1 0 8 0 amappl10 144 64 0 63 2 1 1 1 0 8 0 amappl9 136 928 0 923 1 0 1 1 0 8 0 amappl8 128 785 0 748 2 0 2 2 0 8 0 amappl7 120 58 0 52 1 0 1 1 0 8 0 amappl6 112 1552 0 1541 1 0 1 1 0 8 0 amappl5 104 232 0 220 1 0 1 1 0 8 0 amappl4 96 329 0 311 1 0 1 1 0 8 0 amappl3 88 233 0 228 1 0 1 1 0 8 0 amappl2 80 26957 0 26899 2 0 2 2 0 8 0 amappl1 72 70015 0 69612 24 14 10 19 0 8 0 amappl 72 9069 0 9032 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 64 139 0 10 3 0 3 3 0 8 0 uaddrrnd 24 2858 0 2843 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2858 0 2843 1 0 1 1 0 8 0 vmmpekpl 168 27929 0 27908 2 0 2 2 0 8 0 vmmpepl 168 316735 0 315300 160 96 64 75 0 357 0 vmsppl 360 2857 0 2843 2 0 2 2 0 8 0 pdppl 4096 5723 0 5686 6 1 5 6 0 8 0 pvpl 32 867130 0 855332 331 211 120 133 0 265 24 pmappl 224 2857 0 2843 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 680 0 48 19 0 19 19 0 8 0