panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *126954 28280 0 0 0x4000000 1K syz-executor.0 3054 52292 0 0x2 0x4000000 0 syz-fuzzer db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x174 sys/kern/subr_prf.c:208 cmpci_match(ffffffff80000000,8,2) at cmpci_match wsmux_getmux(7fffffff) at wsmux_getmux+0x71 sys/dev/wscons/wsmux.c:152 wsmux_add_mux(7fffffff,ffff800000026d00) at wsmux_add_mux+0x2f sys/dev/wscons/wsmux.c:594 VOP_IOCTL(fffffd806881e488,80085761,ffff800020c41550,3,fffffd807f7c6720,ffff800020b292d8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806cbeab58,80085761,ffff800020c41550,ffff800020b292d8) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b292d8,ffff800020c41698,ffff800020c41680) at sys_ioctl+0x651 syscall(ffff800020c41730) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c41730) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,f9feaeb5010) at Xsyscall+0x128 end of kernel end trace frame: 0xfa265c55680, 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 mallocarray: overflow 18446744071562067968 * 8 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 cmpci_match(ffffffff80000000,8,2) at cmpci_match wsmux_getmux(7fffffff) at wsmux_getmux+0x71 sys/dev/wscons/wsmux.c:152 wsmux_add_mux(7fffffff,ffff800000026d00) at wsmux_add_mux+0x2f sys/dev/wscons/wsmux.c:594 VOP_IOCTL(fffffd806881e488,80085761,ffff800020c41550,3,fffffd807f7c6720,ffff800020b292d8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806cbeab58,80085761,ffff800020c41550,ffff800020b292d8) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b292d8,ffff800020c41698,ffff800020c41680) at sys_ioctl+0x651 syscall(ffff800020c41730) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c41730) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,f9feaeb5010) at Xsyscall+0x128 end of kernel end trace frame: 0xfa265c55680, count: -10 ddb{1}> show registers rdi 0xffffffff81655cb7 db_enter+0x17 rsi 0x14c9 __ALIGN_SIZE+0x4c9 rbp 0xffff800020c41190 rbx 0xffff800020c41240 rdx 0x14ca __ALIGN_SIZE+0x4ca rcx 0xffff8000037b9000 rax 0xffff8000037b9000 r8 0xffffffff81a01223 kprintf+0x183 r9 0x1 r10 0x25 r11 0x610be69ee0437bb7 r12 0x3000000008 r13 0xffff800020c411a0 r14 0x100 r15 0x1 rip 0xffffffff81655cb8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c41180 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=126954 stat=onproc flags process=0 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020b299e0,0xffffffff8234d070 process=0xffff800020b7c6a8 user=0xffff800020c3c000, vmspace=0xfffffd807effe708 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 28280 183574 44612 0 2 0 syz-executor.0 *28280 126954 44612 0 7 0x4000000 syz-executor.0 80342 29605 52292 0 2 0x2 syz-executor.1 44612 439237 52292 0 3 0x82 nanosleep syz-executor.0 31279 361457 0 0 3 0x14200 bored sosplice 52292 199081 61797 0 3 0x82 thrsleep syz-fuzzer 52292 153786 61797 0 3 0x4000082 nanosleep syz-fuzzer 52292 44472 61797 0 3 0x4000082 thrsleep syz-fuzzer 52292 79680 61797 0 3 0x4000082 kqread syz-fuzzer 52292 477930 61797 0 3 0x4000082 thrsleep syz-fuzzer 52292 2936 61797 0 3 0x4000082 thrsleep syz-fuzzer 52292 487378 61797 0 3 0x4000082 thrsleep syz-fuzzer 52292 469382 61797 0 3 0x4000082 thrsleep syz-fuzzer 52292 172772 61797 0 3 0x4000082 thrsleep syz-fuzzer 52292 3054 61797 0 7 0x4000002 syz-fuzzer 61797 26074 60221 0 3 0x10008a pause ksh 60221 487394 69856 0 3 0x92 select sshd 4551 200195 1 0 3 0x100083 ttyin getty 69856 130688 1 0 3 0x80 select sshd 41067 109445 89984 74 3 0x100092 bpf pflogd 89984 90429 1 0 3 0x80 netio pflogd 32535 406399 42326 73 3 0x100090 kqread syslogd 42326 391142 1 0 3 0x100082 netio syslogd 44296 373366 1 77 3 0x100090 poll dhclient 14863 406062 1 0 3 0x80 poll dhclient 86417 89934 0 0 2 0x14200 zerothread 8786 255252 0 0 3 0x14200 aiodoned aiodoned 99063 510490 0 0 3 0x14200 syncer update 10927 122628 0 0 3 0x14200 cleaner cleaner 99522 101914 0 0 3 0x14200 reaper reaper 15313 26068 0 0 3 0x14200 pgdaemon pagedaemon 85430 354211 0 0 3 0x14200 bored crynlk 32357 463935 0 0 3 0x14200 bored crypto 64902 333754 0 0 3 0x40014200 acpi0 acpi0 58013 446120 0 0 3 0x40014200 idle1 66070 115705 0 0 3 0x14200 bored softnet 19985 308896 0 0 3 0x14200 bored systqmp 28486 214987 0 0 3 0x14200 bored systq 14596 242097 0 0 3 0x40014200 bored softclock 25636 181927 0 0 3 0x40014200 idle0 1588 393387 0 0 3 0x14200 bored smr 1 334936 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 28280 (syz-executor.0) thread 0xffff800020b292d8 (126954) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82372440) locked @ /syzkaller/managers/multicore/kernel/sys/sys/syscall_mi.h:90 #0 witness_lock+0x594 sys/kern/subr_witness.c:1201 #1 syscall+0x48b mi_syscall sys/sys/syscall_mi.h:91 [inline] #1 syscall+0x48b sys/arch/amd64/amd64/trap.c:574 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9524 6441K 6441K 78643K 10822 0 0 pcb 29 10K 10K 78643K 347 0 0 rtable 100 3K 4K 78643K 452 0 0 ifaddr 58 13K 13K 78643K 144 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1480 0 0 iov 0 0K 16K 78643K 67 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1206 76K 76K 78643K 1614 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 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 75 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 21K 78643K 581 0 0 sigio 0 0K 0K 78643K 8 0 0 proc 53 50K 71K 78643K 481 0 0 subproc 64 65538K 67586K 78643K 244 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 71 0 0 in_multi 33 2K 2K 78643K 100 0 0 ether_multi 1 0K 0K 78643K 6 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 90 397K 397K 78643K 90 0 0 exec 0 0K 1K 78643K 280 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 83 20K 30K 78643K 2779 0 0 UVM aobj 42 2K 2K 78643K 44 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 38 0 0 NDP 12 0K 0K 78643K 45 0 0 temp 172 2379K 2459K 78643K 4939 0 0 kqueue 0 0K 0K 78643K 6 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 9 0 5 1 0 1 1 0 8 0 inpcbpl 280 342 0 335 1 0 1 1 0 8 0 plimitpl 152 29 0 21 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 89 0 49 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 118 0 114 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 14 0 10 1 0 1 1 0 8 0 ppxss 1128 13 0 13 5 4 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 23 0 16 1 0 1 1 0 8 0 pfstkey 112 23 0 16 1 0 1 1 0 8 0 pfstate 328 23 0 16 2 0 2 2 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 392 0 204 12 0 12 12 0 8 0 art_table 32 393 0 204 2 0 2 2 0 8 0 art_node 16 86 0 52 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 4 1 0 1 1 0 8 0 semapl 112 73 0 63 1 0 1 1 0 8 0 shmpl 112 42 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2488 0 1056 47 0 47 47 0 8 0 ffsino 272 2488 0 1056 97 1 96 96 0 8 0 nchpl 144 3485 0 1835 62 0 62 62 0 8 0 uvmvnodes 72 2669 0 0 49 0 49 49 0 8 0 vnodes 200 2669 0 0 141 0 141 141 0 8 0 namei 1024 10420 0 10420 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 8758 0 8758 10 8 2 6 0 8 2 sigapl 432 762 0 747 2 0 2 2 0 8 0 futexpl 56 6415 0 6415 1 0 1 1 0 8 1 knotepl 112 289 0 262 3 2 1 2 0 8 0 kqueuepl 104 154 0 152 1 0 1 1 0 8 0 pipepl 112 446 0 427 1 0 1 1 0 8 0 fdescpl 488 763 0 747 3 0 3 3 0 8 0 filepl 152 4556 0 4452 5 0 5 5 0 8 1 lockfpl 104 181 0 181 2 1 1 1 0 8 1 lockfspl 32 282 0 282 2 1 1 1 0 8 1 sessionpl 112 23 0 12 1 0 1 1 0 8 0 pgrppl 48 37 0 26 1 0 1 1 0 8 0 ucredpl 96 1038 0 1029 1 0 1 1 0 8 0 zombiepl 144 747 0 747 1 0 1 1 0 8 1 processpl 840 779 0 747 4 0 4 4 0 8 0 procpl 600 2019 0 1977 4 0 4 4 0 8 0 srpgc 64 31 0 31 3 2 1 1 0 8 1 sosppl 128 2 0 2 1 1 0 1 0 8 0 sockpl 384 628 0 605 3 0 3 3 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 129 0 0 16 0 16 16 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 163 0 0 9 0 9 9 0 8 0 bufpl 256 6309 0 1043 330 0 330 330 0 8 0 anonpl 16 90200 0 82497 56 4 52 52 0 125 13 amapchunkpl 152 4358 0 4261 13 4 9 9 0 158 4 amappl16 192 3905 0 3438 43 11 32 36 0 8 8 amappl15 184 89 0 87 1 0 1 1 0 8 0 amappl14 176 39 0 34 1 0 1 1 0 8 0 amappl13 168 40 0 36 1 0 1 1 0 8 0 amappl12 160 27 0 26 2 1 1 1 0 8 0 amappl11 152 483 0 468 1 0 1 1 0 8 0 amappl10 144 107 0 103 1 0 1 1 0 8 0 amappl9 136 620 0 616 1 0 1 1 0 8 0 amappl8 128 179 0 157 1 0 1 1 0 8 0 amappl7 120 41 0 35 1 0 1 1 0 8 0 amappl6 112 64 0 58 1 0 1 1 0 8 0 amappl5 104 214 0 199 1 0 1 1 0 8 0 amappl4 96 491 0 466 2 1 1 2 0 8 0 amappl3 88 152 0 147 1 0 1 1 0 8 0 amappl2 80 5970 0 5917 2 0 2 2 0 8 0 amappl1 72 26374 0 25938 24 14 10 19 0 8 0 amappl 72 2297 0 2260 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 43 0 2 1 0 1 1 0 8 0 uaddrrnd 24 763 0 747 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 763 0 747 1 0 1 1 0 8 0 vmmpekpl 168 10096 0 10072 2 0 2 2 0 8 0 vmmpepl 168 88756 0 87300 107 27 80 80 0 357 12 vmsppl 360 762 0 747 2 0 2 2 0 8 0 pdppl 4096 1534 0 1494 6 0 6 6 0 8 0 pvpl 32 268106 0 257193 149 15 134 134 0 265 31 pmappl 224 762 0 747 3 1 2 2 0 8 1 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 485 0 4 14 0 14 14 0 8 0