login: AApanic: timeout_add: to_ticks (-31) < 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 414460 15145 0 0 0 0 syz-executor.1 *356010 15145 0 0 0x4000000 1K syz-executor.1 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,ffffffe1) at timeout_add+0x194 sys/kern/kern_timeout.c:190 pcppi_bell(ffff80000066d000,4,ffffffe1,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800020c457b0,2,ffff800020b432d8) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800020c457b0,2,ffff800020b432d8) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd8007f37408,20005302,ffff800020c457b0,2,fffffd807f7c7a20,ffff800020b432d8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806931bb60,20005302,ffff800020c457b0,ffff800020b432d8) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b432d8,ffff800020c458f8,ffff800020c458e0) at sys_ioctl+0x646 syscall(ffff800020c45990) at syscall+0x5ac mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c45990) at syscall+0x5ac sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff88,0,3,eab0e146010) at Xsyscall+0x128 end of kernel end trace frame: 0xead3d7944a0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic timeout_add: to_ticks (-31) < 0 ddb{1}> 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,ffffffe1) at timeout_add+0x194 sys/kern/kern_timeout.c:190 pcppi_bell(ffff80000066d000,4,ffffffe1,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234 spkrioctl(1b00,20005302,ffff800020c457b0,2,ffff800020b432d8) at spkrioctl+0x230 tone sys/dev/isa/spkr.c:89 [inline] spkrioctl(1b00,20005302,ffff800020c457b0,2,ffff800020b432d8) at spkrioctl+0x230 sys/dev/isa/spkr.c:503 VOP_IOCTL(fffffd8007f37408,20005302,ffff800020c457b0,2,fffffd807f7c7a20,ffff800020b432d8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806931bb60,20005302,ffff800020c457b0,ffff800020b432d8) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b432d8,ffff800020c458f8,ffff800020c458e0) at sys_ioctl+0x646 syscall(ffff800020c45990) at syscall+0x5ac mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c45990) at syscall+0x5ac sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff88,0,3,eab0e146010) at Xsyscall+0x128 end of kernel end trace frame: 0xead3d7944a0, count: -10 ddb{1}> show registers rdi 0xffffffff8125d7b7 db_enter+0x17 rsi 0xdb3 rbp 0xffff800020c453d0 rbx 0xffff800020c45480 rdx 0xdb4 rcx 0xffff800002b49000 rax 0xffff800002b49000 r8 0xffffffff811d6983 kprintf+0x183 r9 0x1 r10 0x25 r11 0x2398b54986793107 r12 0x3000000008 r13 0xffff800020c453e0 r14 0x100 r15 0x1 rip 0xffffffff8125d7b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c453c0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=356010 stat=onproc flags process=0 proc=4000000 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800020b42e28,0xffffffff82310f08 process=0xffff800020b44358 user=0xffff800020c40000, vmspace=0xfffffd806e958b48 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 15145 414460 43446 0 7 0 syz-executor.1 *15145 356010 43446 0 7 0x4000000 syz-executor.1 47391 491538 50803 0 3 0x2 biowait syz-executor.0 91480 109443 1 0 3 0x100083 ttyin getty 72192 51538 0 0 3 0x14200 bored sosplice 43446 202977 50803 0 3 0x82 nanosleep syz-executor.1 50803 418373 48063 0 3 0x82 thrsleep syz-fuzzer 50803 197224 48063 0 3 0x4000082 nanosleep syz-fuzzer 50803 213329 48063 0 3 0x4000082 thrsleep syz-fuzzer 50803 466598 48063 0 3 0x4000082 thrsleep syz-fuzzer 50803 261250 48063 0 3 0x4000082 thrsleep syz-fuzzer 50803 96401 48063 0 3 0x4000082 thrsleep syz-fuzzer 50803 491495 48063 0 3 0x4000082 thrsleep syz-fuzzer 50803 4443 48063 0 3 0x4000082 kqread syz-fuzzer 50803 7632 48063 0 3 0x4000082 thrsleep syz-fuzzer 50803 227326 48063 0 3 0x4000082 thrsleep syz-fuzzer 48063 314486 70368 0 3 0x10008a pause ksh 70368 38592 81067 0 3 0x92 select sshd 81067 214387 1 0 3 0x80 select sshd 47330 135578 27464 73 3 0x100090 kqread syslogd 27464 506404 1 0 3 0x100082 netio syslogd 10389 313106 1 77 3 0x100090 poll dhclient 61101 183211 1 0 3 0x80 poll dhclient 17117 180389 0 0 3 0x14200 pgzero zerothread 45909 430222 0 0 3 0x14200 aiodoned aiodoned 43618 74770 0 0 3 0x14200 syncer update 90366 186122 0 0 3 0x14200 cleaner cleaner 53081 135913 0 0 3 0x14200 reaper reaper 93128 381523 0 0 3 0x14200 pgdaemon pagedaemon 56256 64142 0 0 3 0x14200 bored crynlk 65612 425782 0 0 3 0x14200 bored crypto 44324 257361 0 0 3 0x40014200 acpi0 acpi0 70396 460954 0 0 3 0x40014200 idle1 49111 58496 0 0 3 0x14200 bored softnet 56070 337235 0 0 3 0x14200 bored systqmp 41422 24343 0 0 3 0x14200 bored systq 93998 482294 0 0 3 0x40014200 bored softclock 8725 449873 0 0 3 0x40014200 idle0 1 452304 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 15145 (syz-executor.1) thread 0xffff800020b432d8 (356010) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82330470) locked @ /syzkaller/managers/multicore/kernel/sys/sys/syscall_mi.h:90 #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 Process 47391 (syz-executor.0) thread 0xffff800020b43530 (491538) exclusive rrwlock inode r = 0 (0xfffffd806e64fc58) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_vnops.c:1547 #0 witness_lock+0x58a sys/kern/subr_witness.c:1205 #1 _rw_enter+0x44d sys/kern/kern_rwlock.c:280 #2 _rrw_enter+0x60 sys/kern/kern_rwlock.c:410 #3 VOP_LOCK+0x57 sys/kern/vfs_vops.c:598 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:549 #5 vget+0x1b8 sys/kern/vfs_subr.c:672 #6 ufs_ihashget+0x151 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x84 sys/ufs/ffs/ffs_vfsops.c:1323 #8 ufs_lookup+0x159c sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x67 sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x556 sys/kern/vfs_lookup.c:523 #11 namei+0x4b2 sys/kern/vfs_lookup.c:224 #12 dounlinkat+0xa5 sys/kern/vfs_syscalls.c:1673 #13 syscall+0x5ac mi_syscall sys/sys/syscall_mi.h:99 [inline] #13 syscall+0x5ac sys/arch/amd64/amd64/trap.c:574 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806a1f11a8) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_vnops.c:1547 #0 witness_lock+0x58a sys/kern/subr_witness.c:1205 #1 _rw_enter+0x44d sys/kern/kern_rwlock.c:280 #2 _rrw_enter+0x60 sys/kern/kern_rwlock.c:410 #3 VOP_LOCK+0x57 sys/kern/vfs_vops.c:598 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:549 #5 vget+0x1b8 sys/kern/vfs_subr.c:672 #6 cache_lookup+0x300 sys/kern/vfs_cache.c:224 #7 ufs_lookup+0x1d7 sys/ufs/ufs/ufs_lookup.c:162 #8 VOP_LOOKUP+0x67 sys/kern/vfs_vops.c:90 #9 vfs_lookup+0x556 sys/kern/vfs_lookup.c:523 #10 namei+0x4b2 sys/kern/vfs_lookup.c:224 #11 dounlinkat+0xa5 sys/kern/vfs_syscalls.c:1673 #12 syscall+0x5ac mi_syscall sys/sys/syscall_mi.h:99 [inline] #12 syscall+0x5ac sys/arch/amd64/amd64/trap.c:574 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9514 6362K 6378K 78643K 11259 0 0 pcb 23 9K 11K 78643K 1243 0 0 rtable 100 3K 4K 78643K 634 0 0 ifaddr 53 13K 14K 78643K 216 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 48 0 0 iov 0 0K 24K 78643K 218 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1213 76K 76K 78643K 2648 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 37 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 278 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1792 194K 288K 78643K 12592 0 0 file desc 5 13K 19K 78643K 2352 0 0 sigio 0 0K 0K 78643K 26 0 0 proc 42 38K 70K 78643K 740 0 0 subproc 64 65538K 67586K 78643K 359 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 236 0 0 in_multi 33 2K 2K 78643K 200 0 0 ether_multi 1 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 96 424K 424K 78643K 96 0 0 exec 0 0K 1K 78643K 406 0 0 pfkey data 0 0K 0K 78643K 4 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 96 21K 30K 78643K 8347 0 0 UVM aobj 130 6K 6K 78643K 141 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 61 0 0 NDP 10 0K 0K 78643K 70 0 0 temp 156 2367K 2439K 78643K 9207 0 0 kqueue 0 0K 0K 78643K 32 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> 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 1261 0 1254 1 0 1 1 0 8 0 plimitpl 152 53 0 46 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 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 544 606 0 602 1 0 1 1 0 8 0 nd6 48 20 0 16 1 0 1 1 0 8 0 ppxss 1128 19 0 19 9 9 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 537 0 348 12 0 12 12 0 8 0 art_table 32 538 0 348 2 0 2 2 0 8 0 art_node 16 112 0 78 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 272 0 262 1 0 1 1 0 8 0 shmpl 112 139 0 11 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 5718 0 4284 47 0 47 47 0 8 0 ffsino 272 5718 0 4284 96 0 96 96 0 8 0 nchpl 144 9249 0 7634 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 27653 0 27653 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 11 0 11 7 7 0 1 0 8 0 scxspl 192 26266 0 26265 16 15 1 5 0 8 0 sigapl 432 2498 0 2485 2 0 2 2 0 8 0 futexpl 56 24063 0 24063 2 1 1 1 0 8 1 knotepl 112 689 0 662 10 9 1 2 0 8 0 kqueuepl 104 624 0 622 1 0 1 1 0 8 0 pipepl 112 1478 0 1459 3 2 1 2 0 8 0 fdescpl 488 2499 0 2485 2 0 2 2 0 8 0 filepl 152 15013 0 14917 12 7 5 6 0 8 1 lockfpl 104 799 0 798 5 4 1 1 0 8 0 lockfspl 32 1021 0 1020 5 4 1 1 0 8 0 sessionpl 112 27 0 17 1 0 1 1 0 8 0 pgrppl 48 61 0 51 1 0 1 1 0 8 0 ucredpl 96 4186 0 4179 1 0 1 1 0 8 0 zombiepl 144 2485 0 2485 1 0 1 1 0 8 1 processpl 840 2514 0 2485 4 0 4 4 0 8 0 procpl 600 7539 0 7500 4 0 4 4 0 8 0 srpgc 64 48 0 48 2 2 0 1 0 8 0 sosppl 128 39 0 39 12 11 1 1 0 8 1 sockpl 384 2367 0 2350 7 4 3 4 0 8 1 mcl64k 65536 550 0 0 66 19 47 65 0 8 1 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 19 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 11 0 0 2 0 2 2 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 134 0 0 15 1 14 15 0 8 0 mtagpl 80 2 0 0 1 0 1 1 0 8 0 mbufpl 256 684 0 0 36 0 36 36 0 8 0 bufpl 256 9209 0 2237 436 0 436 436 0 8 0 anonpl 16 258227 0 250819 151 104 47 51 0 125 11 amapchunkpl 152 14546 0 14460 33 28 5 9 0 158 0 amappl16 192 13885 0 13469 132 101 31 35 0 8 8 amappl15 184 823 0 821 1 0 1 1 0 8 0 amappl14 176 15 0 14 2 1 1 1 0 8 0 amappl13 168 51 0 46 1 0 1 1 0 8 0 amappl12 160 91 0 90 4 3 1 1 0 8 0 amappl11 152 452 0 443 1 0 1 1 0 8 0 amappl10 144 2301 0 2294 1 0 1 1 0 8 0 amappl9 136 364 0 361 1 0 1 1 0 8 0 amappl8 128 206 0 180 2 0 2 2 0 8 0 amappl7 120 59 0 52 1 0 1 1 0 8 0 amappl6 112 68 0 57 1 0 1 1 0 8 0 amappl5 104 973 0 961 1 0 1 1 0 8 0 amappl4 96 295 0 271 2 1 1 2 0 8 0 amappl3 88 291 0 284 1 0 1 1 0 8 0 amappl2 80 23674 0 23622 2 0 2 2 0 8 0 amappl1 72 62410 0 61995 24 14 10 19 0 8 0 amappl 72 7819 0 7786 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 64 140 0 11 3 0 3 3 0 8 0 uaddrrnd 24 2499 0 2485 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2499 0 2485 1 0 1 1 0 8 0 vmmpekpl 168 23749 0 23726 2 0 2 2 0 8 0 vmmpepl 168 274549 0 273183 153 83 70 76 0 357 4 vmsppl 360 2498 0 2485 2 0 2 2 0 8 0 pdppl 4096 5005 0 4970 5 0 5 5 0 8 0 pvpl 32 717734 0 707322 277 151 126 134 0 265 35 pmappl 224 2498 0 2485 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 679 0 23 20 0 20 20 0 8 0