panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 425070 47379 0 0 0 1 syz-executor.0 *238336 47379 0 0 0x4000000 0K syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x174 sys/kern/subr_prf.c:208 gentbimatch(ffffffff80000000,8,2) at gentbimatch 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(fffffd8079ab1b78,80085761,ffff800020c0f950,42,fffffd807f7c69c0,ffff800020b39530) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806cb503a0,80085761,ffff800020c0f950,ffff800020b39530) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b39530,ffff800020c0fa98,ffff800020c0fa80) at sys_ioctl+0x651 syscall(ffff800020c0fb30) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c0fb30) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,c94d734d010) at Xsyscall+0x128 end of kernel end trace frame: 0xc970e6e6060, 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 mallocarray: overflow 18446744071562067968 * 8 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x174 sys/kern/subr_prf.c:208 gentbimatch(ffffffff80000000,8,2) at gentbimatch 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(fffffd8079ab1b78,80085761,ffff800020c0f950,42,fffffd807f7c69c0,ffff800020b39530) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806cb503a0,80085761,ffff800020c0f950,ffff800020b39530) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b39530,ffff800020c0fa98,ffff800020c0fa80) at sys_ioctl+0x651 syscall(ffff800020c0fb30) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c0fb30) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,c94d734d010) at Xsyscall+0x128 end of kernel end trace frame: 0xc970e6e6060, count: -10 ddb{0}> show registers rdi 0xffffffff81e2e757 db_enter+0x17 rsi 0x12c8 __ALIGN_SIZE+0x2c8 rbp 0xffff800020c0f590 rbx 0xffff800020c0f640 rdx 0x12c9 __ALIGN_SIZE+0x2c9 rcx 0xffff800000966000 rax 0xffff800000966000 r8 0xffffffff811c43a3 kprintf+0x183 r9 0x1 r10 0x25 r11 0x4ffd2fffaf905f2 r12 0x3000000008 r13 0xffff800020c0f5a0 r14 0x100 r15 0x1 rip 0xffffffff81e2e758 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c0f580 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=238336 stat=onproc flags process=0 proc=4000000 pri=68, usrpri=68, nice=20 forw=0xffffffffffffffff, list=0xffff800020b384c8,0xffffffff82394e00 process=0xffff800020b8c6a8 user=0xffff800020c0a000, vmspace=0xfffffd807effe000 estcpu=35, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 47379 425070 7993 0 7 0 syz-executor.0 *47379 238336 7993 0 7 0x4000000 syz-executor.0 26855 482777 54566 0 2 0x2 syz-executor.1 7993 166685 54566 0 3 0x82 nanosleep syz-executor.0 54566 522515 46229 0 3 0x82 thrsleep syz-fuzzer 54566 248514 46229 0 3 0x4000082 nanosleep syz-fuzzer 54566 298262 46229 0 3 0x4000082 thrsleep syz-fuzzer 54566 106756 46229 0 3 0x4000082 thrsleep syz-fuzzer 54566 415269 46229 0 3 0x4000082 thrsleep syz-fuzzer 54566 358692 46229 0 3 0x4000082 thrsleep syz-fuzzer 54566 373766 46229 0 3 0x4000082 thrsleep syz-fuzzer 54566 407390 46229 0 3 0x4000082 thrsleep syz-fuzzer 54566 206850 46229 0 3 0x4000082 kqread syz-fuzzer 54566 85216 46229 0 3 0x4000082 thrsleep syz-fuzzer 46229 513632 59413 0 3 0x10008a pause ksh 59413 277621 93611 0 3 0x92 select sshd 72142 268187 1 0 3 0x100083 ttyin getty 93611 294955 1 0 3 0x80 select sshd 137 37976 3001 74 3 0x100092 bpf pflogd 3001 507449 1 0 3 0x80 netio pflogd 23025 427439 44766 73 3 0x100090 kqread syslogd 44766 483223 1 0 3 0x100082 netio syslogd 64085 64878 1 77 3 0x100090 poll dhclient 31640 103914 1 0 3 0x80 poll dhclient 71801 331688 0 0 3 0x14200 pgzero zerothread 59163 172345 0 0 3 0x14200 aiodoned aiodoned 33886 304759 0 0 3 0x14200 syncer update 95197 359353 0 0 3 0x14200 cleaner cleaner 16681 511573 0 0 3 0x14200 reaper reaper 35706 191495 0 0 3 0x14200 pgdaemon pagedaemon 40861 415677 0 0 3 0x14200 bored crynlk 15338 231162 0 0 3 0x14200 bored crypto 45810 103250 0 0 3 0x40014200 acpi0 acpi0 30854 200230 0 0 3 0x40014200 idle1 82054 372045 0 0 3 0x14200 bored softnet 62142 181673 0 0 3 0x14200 bored systqmp 88979 390485 0 0 3 0x14200 bored systq 28936 438268 0 0 3 0x40014200 bored softclock 85006 327533 0 0 3 0x40014200 idle0 5347 177783 0 0 3 0x14200 bored smr 1 338949 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 47379 (syz-executor.0) thread 0xffff800020b39530 (238336) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8234a3d0) 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 26855 (syz-executor.1) thread 0xffff800020b39080 (482777) exclusive rrwlock inode r = 0 (0xfffffd80689190a0) 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 vget+0x1c3 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+0x15d3 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+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] #13 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80689194e0) 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 dounlinkat+0xa5 sys/kern/vfs_syscalls.c:1673 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9481 6401K 6414K 78643K 10592 0 0 pcb 25 9K 11K 78643K 117 0 0 rtable 97 3K 3K 78643K 218 0 0 ifaddr 45 11K 11K 78643K 53 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1470 0 0 iov 0 0K 12K 78643K 23 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1199 75K 75K 78643K 1276 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 4 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 11 0K 0K 78643K 12 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 21K 78643K 127 0 0 proc 53 50K 71K 78643K 345 0 0 subproc 64 65538K 67586K 78643K 102 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 21 0 0 in_multi 33 2K 2K 78643K 45 0 0 ether_multi 1 0K 0K 78643K 1 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 42 185K 185K 78643K 42 0 0 exec 0 0K 1K 78643K 203 0 0 pfkey data 0 0K 0K 78643K 3 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 84 20K 25K 78643K 1264 0 0 UVM aobj 10 2K 2K 78643K 10 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 4 0 0 NDP 8 0K 0K 78643K 15 0 0 temp 110 2366K 2430K 78643K 3519 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 5 0 1 1 0 1 1 0 8 0 inpcbpl 280 91 0 84 1 0 1 1 0 8 0 plimitpl 152 20 0 12 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 52 0 12 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 32 0 28 1 0 1 1 0 8 0 rttmr 72 3 0 3 1 1 0 1 0 8 0 nd6 48 6 0 2 1 0 1 1 0 8 0 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 13 0 2 1 0 1 1 0 8 0 pfstkey 112 13 0 2 1 0 1 1 0 8 0 pfstate 328 13 0 2 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 256 227 0 41 12 0 12 12 0 8 0 art_table 32 228 0 41 2 0 2 2 0 8 0 art_node 16 51 0 17 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 10 0 1 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1622 0 204 46 0 46 46 0 8 0 ffsino 272 1622 0 204 95 0 95 95 0 8 0 nchpl 144 1990 0 354 61 0 61 61 0 8 0 uvmvnodes 72 1695 0 0 31 0 31 31 0 8 0 vnodes 200 1695 0 0 90 0 90 90 0 8 0 namei 1024 5271 0 5271 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 5294 0 5294 8 7 1 6 0 8 1 sigapl 432 323 0 308 2 0 2 2 0 8 0 futexpl 56 1129 0 1129 1 0 1 1 0 8 1 knotepl 112 86 0 67 1 0 1 1 0 8 0 kqueuepl 104 38 0 36 1 0 1 1 0 8 0 pipepl 112 204 0 185 2 1 1 1 0 8 0 fdescpl 488 324 0 308 4 1 3 3 0 8 0 filepl 152 1730 0 1630 5 0 5 5 0 8 1 lockfpl 104 32 0 31 2 1 1 1 0 8 0 lockfspl 32 62 0 61 2 1 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 222 0 213 1 0 1 1 0 8 0 zombiepl 144 308 0 308 2 1 1 1 0 8 1 processpl 840 339 0 308 4 0 4 4 0 8 0 procpl 600 583 0 542 4 0 4 4 0 8 0 srpgc 64 7 0 7 1 0 1 1 0 8 1 sockpl 384 184 0 165 4 0 4 4 0 8 2 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 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 124 0 0 15 0 15 15 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 129 0 0 8 0 8 8 0 8 0 bufpl 256 5956 0 1144 301 0 301 301 0 8 0 anonpl 16 40308 0 32335 39 2 37 37 0 125 2 amapchunkpl 152 1466 0 1370 8 1 7 7 0 158 2 amappl16 192 916 0 496 23 0 23 23 0 8 1 amappl15 184 57 0 53 1 0 1 1 0 8 0 amappl14 176 103 0 99 2 1 1 1 0 8 0 amappl13 168 30 0 26 1 0 1 1 0 8 0 amappl12 160 93 0 90 1 0 1 1 0 8 0 amappl11 152 26 0 11 1 0 1 1 0 8 0 amappl10 144 67 0 64 1 0 1 1 0 8 0 amappl9 136 603 0 599 1 0 1 1 0 8 0 amappl8 128 153 0 139 1 0 1 1 0 8 0 amappl7 120 34 0 30 1 0 1 1 0 8 0 amappl6 112 53 0 48 1 0 1 1 0 8 0 amappl5 104 145 0 131 1 0 1 1 0 8 0 amappl4 96 474 0 442 2 1 1 2 0 8 0 amappl3 88 248 0 239 1 0 1 1 0 8 0 amappl2 80 1639 0 1583 2 0 2 2 0 8 0 amappl1 72 16508 0 16064 25 15 10 20 0 8 0 amappl 72 838 0 801 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 324 0 308 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 324 0 308 1 0 1 1 0 8 0 vmmpekpl 168 6733 0 6706 2 0 2 2 0 8 0 vmmpepl 168 42231 0 40802 91 10 81 81 0 357 14 vmsppl 360 323 0 308 2 0 2 2 0 8 0 pdppl 4096 656 0 616 7 1 6 6 0 8 0 pvpl 32 144686 0 133476 111 8 103 104 0 265 8 pmappl 224 323 0 308 2 0 2 2 0 8 1 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 452 0 4 13 0 13 13 0 8 0