panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 58886 54716 0 0 0 0 syz-executor.1 *458303 54716 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 hfsc_idx(ffffffff80000000,8) at hfsc_idx 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(fffffd80691fa3c8,80085761,ffff800020c01300,2,fffffd807f7c68a0,ffff800020b659e0) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80671d6ef0,80085761,ffff800020c01300,ffff800020b659e0) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b659e0,ffff800020c01448,ffff800020c01430) at sys_ioctl+0x651 syscall(ffff800020c014e0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c014e0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,8249bc5010) at Xsyscall+0x128 end of kernel end trace frame: 0x850a6c6080, 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 hfsc_idx(ffffffff80000000,8) at hfsc_idx 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(fffffd80691fa3c8,80085761,ffff800020c01300,2,fffffd807f7c68a0,ffff800020b659e0) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80671d6ef0,80085761,ffff800020c01300,ffff800020b659e0) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b659e0,ffff800020c01448,ffff800020c01430) at sys_ioctl+0x651 syscall(ffff800020c014e0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c014e0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,8249bc5010) at Xsyscall+0x128 end of kernel end trace frame: 0x850a6c6080, count: -10 ddb{1}> show registers rdi 0xffffffff81ba3af7 db_enter+0x17 rsi 0x14f6 __ALIGN_SIZE+0x4f6 rbp 0xffff800020c00f40 rbx 0xffff800020c00ff0 rdx 0x14f7 __ALIGN_SIZE+0x4f7 rcx 0xffff8000019b5000 rax 0xffff8000019b5000 r8 0xffffffff8106c163 kprintf+0x183 r9 0x1 r10 0x25 r11 0x83ee59ef7453fa38 r12 0x3000000008 r13 0xffff800020c00f50 r14 0x100 r15 0x1 rip 0xffffffff81ba3af8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c00f30 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=458303 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b64018,0xffffffff823df7d8 process=0xffff800020b7cd38 user=0xffff800020bfc000, vmspace=0xfffffd807effeb40 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54716 58886 10170 0 7 0 syz-executor.1 *54716 458303 10170 0 7 0x4000000 syz-executor.1 10170 267435 51093 0 3 0x82 nanosleep syz-executor.1 77604 428111 1 0 3 0x100083 ttyin getty 73312 235352 51093 0 3 0x2 biowait syz-executor.0 20111 315726 0 0 3 0x14200 bored sosplice 51093 469460 4724 0 3 0x82 thrsleep syz-fuzzer 51093 439769 4724 0 3 0x4000082 nanosleep syz-fuzzer 51093 428171 4724 0 3 0x4000082 thrsleep syz-fuzzer 51093 455593 4724 0 3 0x4000082 kqread syz-fuzzer 51093 442324 4724 0 3 0x4000082 thrsleep syz-fuzzer 51093 25930 4724 0 3 0x4000082 thrsleep syz-fuzzer 51093 185631 4724 0 3 0x4000082 thrsleep syz-fuzzer 51093 170251 4724 0 3 0x4000082 thrsleep syz-fuzzer 51093 128664 4724 0 3 0x4000082 thrsleep syz-fuzzer 51093 127081 4724 0 3 0x4000082 thrsleep syz-fuzzer 4724 115279 60888 0 3 0x10008a pause ksh 60888 331058 40440 0 3 0x92 select sshd 40440 152267 1 0 3 0x80 select sshd 36321 449221 96973 74 3 0x100092 bpf pflogd 96973 419238 1 0 3 0x80 netio pflogd 29990 436311 15382 73 3 0x100010 ffs_fsync syslogd 15382 171825 1 0 3 0x100082 netio syslogd 7899 381087 1 77 3 0x100090 poll dhclient 90478 511521 1 0 3 0x80 poll dhclient 96787 503269 0 0 3 0x14200 pgzero zerothread 20697 30366 0 0 3 0x14200 aiodoned aiodoned 36172 501087 0 0 3 0x14200 syncer update 5698 291106 0 0 3 0x14200 cleaner cleaner 63971 339094 0 0 3 0x14200 reaper reaper 92679 282192 0 0 3 0x14200 pgdaemon pagedaemon 42605 239132 0 0 3 0x14200 bored crynlk 13239 49067 0 0 3 0x14200 bored crypto 6413 270448 0 0 3 0x40014200 acpi0 acpi0 34641 24083 0 0 3 0x40014200 idle1 72017 328583 0 0 3 0x14200 bored softnet 10955 127012 0 0 3 0x14200 bored systqmp 45754 291470 0 0 3 0x14200 bored systq 45480 256425 0 0 3 0x40014200 bored softclock 52376 177950 0 0 3 0x40014200 idle0 21976 164898 0 0 3 0x14200 bored smr 1 87567 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 54716 (syz-executor.1) thread 0xffff800020b659e0 (458303) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff823d7a38) 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 Process 73312 (syz-executor.0) thread 0xffff800020b65080 (235352) exclusive rrwlock inode r = 0 (0xfffffd806e37f708) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_ihash.c:140 #0 witness_lock+0x594 sys/kern/subr_witness.c:1201 #1 _rw_enter+0x45d sys/kern/kern_rwlock.c:280 #2 _rrw_enter+0x60 sys/kern/kern_rwlock.c:410 #3 ufs_ihashins+0x6d sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x143 sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0x10f sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0x76 sys/kern/vfs_vops.c:449 #8 domkdirat+0x12d sys/kern/vfs_syscalls.c:2881 #9 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] #9 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cbf0a30) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_vnops.c:1547 #0 witness_lock+0x594 sys/kern/subr_witness.c:1201 #1 _rw_enter+0x45d 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:602 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:549 #5 vfs_lookup+0xf5 sys/kern/vfs_lookup.c:387 #6 namei+0x4b2 sys/kern/vfs_lookup.c:224 #7 domkdirat+0x81 sys/kern/vfs_syscalls.c:2866 #8 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] #8 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 #9 Xsyscall+0x128 Process 29990 (syslogd) thread 0xffff800020b759d8 (436311) exclusive rrwlock inode r = 0 (0xfffffd806eb50c48) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_vnops.c:1547 #0 witness_lock+0x594 sys/kern/subr_witness.c:1201 #1 _rw_enter+0x45d 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:602 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:549 #5 sys_fsync+0x114 sys/kern/vfs_syscalls.c:2704 #6 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] #6 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9530 6424K 6440K 78643K 10908 0 0 pcb 25 9K 10K 78643K 362 0 0 rtable 100 3K 4K 78643K 667 0 0 ifaddr 63 14K 14K 78643K 194 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1493 0 0 iov 0 0K 24K 78643K 106 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1190 75K 75K 78643K 1823 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 13 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 94 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 21K 78643K 816 0 0 sigio 0 0K 0K 78643K 9 0 0 proc 54 51K 71K 78643K 650 0 0 subproc 64 65538K 67586K 78643K 476 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 88 0 0 in_multi 33 2K 2K 78643K 189 0 0 ether_multi 1 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 84 371K 371K 78643K 84 0 0 exec 0 0K 1K 78643K 302 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 94 21K 22K 78643K 3519 0 0 UVM aobj 46 7K 7K 78643K 48 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 35 0 0 NDP 13 0K 0K 78643K 67 0 0 temp 179 2379K 2446K 78643K 5942 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 16 0 12 1 0 1 1 0 8 0 inpcbpl 280 426 0 419 1 0 1 1 0 8 0 plimitpl 152 52 0 44 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 149 0 109 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 140 0 136 1 0 1 1 0 8 0 nd6 48 28 0 24 1 0 1 1 0 8 0 ppxss 1128 13 0 13 5 4 1 1 0 8 1 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 2 0 2 1 0 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 35 0 25 1 0 1 1 0 8 0 pfstkey 112 35 0 25 1 0 1 1 0 8 0 pfstate 328 35 0 25 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 256 699 0 511 12 0 12 12 0 8 0 art_table 32 700 0 511 2 0 2 2 0 8 0 art_node 16 148 0 114 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 92 0 82 1 0 1 1 0 8 0 shmpl 112 46 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2844 0 1385 49 1 48 48 0 8 0 ffsino 272 2844 0 1385 98 0 98 98 0 8 0 nchpl 144 4148 0 2473 63 0 63 63 0 8 0 uvmvnodes 72 3146 0 0 58 0 58 58 0 8 0 vnodes 200 3146 0 0 166 0 166 166 0 8 0 namei 1024 12538 0 12537 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 3 0 3 2 2 0 1 0 8 0 scxspl 192 11052 0 11050 11 10 1 6 0 8 0 sigapl 432 977 0 962 2 0 2 2 0 8 0 futexpl 56 8438 0 8438 1 0 1 1 0 8 1 knotepl 112 456 0 429 2 1 1 2 0 8 0 kqueuepl 104 208 0 206 1 0 1 1 0 8 0 pipepl 112 580 0 561 2 1 1 1 0 8 0 fdescpl 488 978 0 962 3 0 3 3 0 8 0 filepl 152 5809 0 5709 5 0 5 5 0 8 1 lockfpl 104 230 0 230 2 1 1 1 0 8 1 lockfspl 32 260 0 260 2 1 1 1 0 8 1 sessionpl 112 31 0 20 1 0 1 1 0 8 0 pgrppl 48 37 0 26 1 0 1 1 0 8 0 ucredpl 96 1355 0 1346 1 0 1 1 0 8 0 zombiepl 144 962 0 962 2 1 1 1 0 8 1 processpl 840 994 0 962 4 0 4 4 0 8 0 procpl 600 2591 0 2549 4 0 4 4 0 8 0 srpgc 64 68 0 68 5 4 1 1 0 8 1 sosppl 128 13 0 13 3 3 0 1 0 8 0 sockpl 384 708 0 689 3 0 3 3 0 8 1 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 116 0 0 14 0 14 14 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 182 0 0 8 0 8 8 0 8 0 bufpl 256 6776 0 1047 359 0 359 359 0 8 0 anonpl 16 113808 0 106607 87 38 49 52 0 125 13 amapchunkpl 152 6115 0 6025 18 13 5 9 0 158 0 amappl16 192 4655 0 4190 61 31 30 36 0 8 5 amappl15 184 150 0 149 1 0 1 1 0 8 0 amappl14 176 220 0 215 1 0 1 1 0 8 0 amappl13 168 422 0 419 1 0 1 1 0 8 0 amappl12 160 101 0 98 1 0 1 1 0 8 0 amappl11 152 374 0 359 1 0 1 1 0 8 0 amappl10 144 78 0 73 1 0 1 1 0 8 0 amappl9 136 489 0 485 1 0 1 1 0 8 0 amappl8 128 334 0 310 1 0 1 1 0 8 0 amappl7 120 288 0 281 1 0 1 1 0 8 0 amappl6 112 186 0 179 1 0 1 1 0 8 0 amappl5 104 253 0 238 1 0 1 1 0 8 0 amappl4 96 373 0 345 2 1 1 2 0 8 0 amappl3 88 169 0 164 1 0 1 1 0 8 0 amappl2 80 7783 0 7725 2 0 2 2 0 8 0 amappl1 72 30813 0 30378 25 15 10 19 0 8 0 amappl 72 2930 0 2894 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 47 0 2 1 0 1 1 0 8 0 uaddrrnd 24 978 0 962 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 978 0 962 1 0 1 1 0 8 0 vmmpekpl 168 11951 0 11928 2 0 2 2 0 8 0 vmmpepl 168 114292 0 112829 116 35 81 86 0 357 11 vmsppl 360 977 0 962 2 0 2 2 0 8 0 pdppl 4096 1964 0 1924 6 0 6 6 0 8 0 pvpl 32 339325 0 328931 167 41 126 129 0 265 29 pmappl 224 977 0 962 3 2 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 514 0 4 15 0 15 15 0 8 0