panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 421361 29993 0 0 0 0 syz-executor.1 * 15376 29993 0 0 0x4000000 1K syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x174 sys/kern/subr_prf.c:208 in6_mask2len(ffffffff80000000,8) at in6_mask2len 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(fffffd8067238340,80085761,ffff800020c4d560,42,fffffd807f7c6a20,ffff800020b752d8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80669323a8,80085761,ffff800020c4d560,ffff800020b752d8) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b752d8,ffff800020c4d6a8,ffff800020c4d690) at sys_ioctl+0x651 syscall(ffff800020c4d740) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c4d740) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,a87f024c010) at Xsyscall+0x128 end of kernel end trace frame: 0xa8a6f5a5e80, 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:398 panic() at panic+0x174 sys/kern/subr_prf.c:208 in6_mask2len(ffffffff80000000,8) at in6_mask2len 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(fffffd8067238340,80085761,ffff800020c4d560,42,fffffd807f7c6a20,ffff800020b752d8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80669323a8,80085761,ffff800020c4d560,ffff800020b752d8) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b752d8,ffff800020c4d6a8,ffff800020c4d690) at sys_ioctl+0x651 syscall(ffff800020c4d740) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c4d740) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,a87f024c010) at Xsyscall+0x128 end of kernel end trace frame: 0xa8a6f5a5e80, count: -10 ddb{1}> show registers rdi 0xffffffff81adbfd7 db_enter+0x17 rsi 0x14ff __ALIGN_SIZE+0x4ff rbp 0xffff800020c4d1a0 rbx 0xffff800020c4d250 rdx 0x1500 __ALIGN_SIZE+0x500 rcx 0xffff800002b66000 rax 0xffff800002b66000 r8 0xffffffff81d75573 kprintf+0x183 r9 0x1 r10 0x25 r11 0x95e797d63a29349e r12 0x3000000008 r13 0xffff800020c4d1b0 r14 0x100 r15 0x1 rip 0xffffffff81adbfd8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c4d190 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=15376 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b74018,0xffffffff8235c268 process=0xffff800020b8c360 user=0xffff800020c48000, vmspace=0xfffffd807effe870 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29993 421361 62920 0 7 0 syz-executor.1 *29993 15376 62920 0 7 0x4000000 syz-executor.1 75009 456329 0 0 3 0x14200 bored sosplice 60021 240265 83769 0 3 0x2 biowait syz-executor.0 62920 252946 83769 0 3 0x82 nanosleep syz-executor.1 83769 437347 24811 0 3 0x82 thrsleep syz-fuzzer 83769 516708 24811 0 3 0x4000082 nanosleep syz-fuzzer 83769 51345 24811 0 3 0x4000082 thrsleep syz-fuzzer 83769 13837 24811 0 3 0x4000082 kqread syz-fuzzer 83769 92572 24811 0 3 0x4000082 thrsleep syz-fuzzer 83769 261322 24811 0 3 0x4000082 thrsleep syz-fuzzer 83769 487027 24811 0 3 0x4000082 thrsleep syz-fuzzer 83769 364612 24811 0 3 0x4000082 thrsleep syz-fuzzer 83769 320004 24811 0 3 0x4000082 thrsleep syz-fuzzer 83769 332357 24811 0 3 0x4000082 thrsleep syz-fuzzer 24811 60698 79254 0 3 0x10008a pause ksh 79254 48661 23927 0 3 0x92 select sshd 42324 432931 1 0 3 0x100083 ttyin getty 23927 444999 1 0 3 0x80 select sshd 26670 189618 69780 74 3 0x100092 bpf pflogd 69780 224651 1 0 3 0x80 netio pflogd 66394 381701 91438 73 3 0x100090 kqread syslogd 91438 108245 1 0 3 0x100082 netio syslogd 80050 362696 1 77 3 0x100090 poll dhclient 94989 255151 1 0 3 0x80 poll dhclient 71992 14070 0 0 3 0x14200 pgzero zerothread 13200 239530 0 0 3 0x14200 aiodoned aiodoned 42176 165357 0 0 3 0x14200 syncer update 61564 432704 0 0 3 0x14200 cleaner cleaner 77994 503225 0 0 3 0x14200 reaper reaper 37384 357564 0 0 3 0x14200 pgdaemon pagedaemon 5966 182302 0 0 3 0x14200 bored crynlk 3049 339988 0 0 3 0x14200 bored crypto 7669 142167 0 0 3 0x40014200 acpi0 acpi0 48698 287792 0 0 3 0x40014200 idle1 5739 365762 0 0 3 0x14200 bored softnet 59789 26435 0 0 3 0x14200 bored systqmp 23053 409554 0 0 3 0x14200 bored systq 27971 397345 0 0 3 0x40014200 bored softclock 23774 482775 0 0 3 0x40014200 idle0 75035 520811 0 0 3 0x14200 bored smr 1 305150 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 29993 (syz-executor.1) thread 0xffff800020b752d8 (15376) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff823681d0) 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 60021 (syz-executor.0) thread 0xffff800020b74720 (240265) exclusive rrwlock inode r = 0 (0xfffffd806e50c808) 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 (0xfffffd8078f7ea28) 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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9482 6401K 6401K 78643K 10641 0 0 pcb 25 9K 11K 78643K 195 0 0 rtable 100 3K 4K 78643K 270 0 0 ifaddr 46 11K 11K 78643K 71 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1473 0 0 iov 0 0K 12K 78643K 16 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1205 75K 76K 78643K 1360 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 12 0K 0K 78643K 30 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 21K 78643K 232 0 0 sigio 0 0K 0K 78643K 2 0 0 proc 54 51K 71K 78643K 375 0 0 subproc 64 65538K 67586K 78643K 138 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 36 0 0 in_multi 33 2K 2K 78643K 70 0 0 ether_multi 1 0K 0K 78643K 5 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 214 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 21K 78643K 1592 0 0 UVM aobj 10 2K 2K 78643K 13 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 18 0 0 NDP 8 0K 0K 78643K 21 0 0 temp 111 2367K 2432K 78643K 3850 0 0 kqueue 0 0K 0K 78643K 2 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 6 0 2 1 0 1 1 0 8 0 inpcbpl 280 159 0 152 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 59 0 19 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 4 0 4 1 1 0 1 0 8 0 tcpcb 544 44 0 40 1 0 1 1 0 8 0 nd6 48 8 0 4 1 0 1 1 0 8 0 ppxss 1128 2 0 2 2 1 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 19 0 4 1 0 1 1 0 8 0 pfstkey 112 19 0 4 1 0 1 1 0 8 0 pfstate 328 19 0 4 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 256 266 0 82 12 0 12 12 0 8 0 art_table 32 267 0 82 2 0 2 2 0 8 0 art_node 16 58 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semapl 112 28 0 18 1 0 1 1 0 8 0 shmpl 112 11 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1797 0 377 46 0 46 46 0 8 0 ffsino 272 1797 0 377 95 0 95 95 0 8 0 nchpl 144 2326 0 687 61 0 61 61 0 8 0 uvmvnodes 72 1907 0 0 35 0 35 35 0 8 0 vnodes 200 1907 0 0 101 0 101 101 0 8 0 namei 1024 6377 0 6377 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 5941 0 5940 8 7 1 6 0 8 0 sigapl 432 425 0 410 2 0 2 2 0 8 0 futexpl 56 2514 0 2514 1 0 1 1 0 8 1 knotepl 112 127 0 108 1 0 1 1 0 8 0 kqueuepl 104 70 0 68 1 0 1 1 0 8 0 pipepl 112 310 0 291 3 1 2 2 0 8 1 fdescpl 488 426 0 410 3 0 3 3 0 8 0 filepl 152 2512 0 2412 7 0 7 7 0 8 3 lockfpl 104 54 0 53 3 2 1 1 0 8 0 lockfspl 32 58 0 57 2 1 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 36 0 25 1 0 1 1 0 8 0 ucredpl 96 445 0 436 1 0 1 1 0 8 0 zombiepl 144 410 0 410 2 1 1 1 0 8 1 processpl 840 442 0 410 4 0 4 4 0 8 0 procpl 600 903 0 861 4 0 4 4 0 8 0 srpgc 64 12 0 12 2 2 0 1 0 8 0 sosppl 128 4 0 4 1 0 1 1 0 8 1 sockpl 384 313 0 294 4 0 4 4 0 8 2 mcl64k 65536 5 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 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 120 0 0 14 0 14 14 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 155 0 0 9 0 9 9 0 8 0 bufpl 256 6062 0 1143 308 0 308 308 0 8 0 anonpl 16 53780 0 45217 49 10 39 47 0 125 4 amapchunkpl 152 1981 0 1896 6 1 5 5 0 158 1 amappl16 192 1640 0 1196 36 11 25 34 0 8 2 amappl15 184 141 0 136 1 0 1 1 0 8 0 amappl14 176 26 0 24 2 1 1 1 0 8 0 amappl13 168 205 0 198 1 0 1 1 0 8 0 amappl12 160 13 0 12 1 0 1 1 0 8 0 amappl11 152 41 0 26 1 0 1 1 0 8 0 amappl10 144 102 0 98 1 0 1 1 0 8 0 amappl9 136 589 0 586 1 0 1 1 0 8 0 amappl8 128 142 0 129 1 0 1 1 0 8 0 amappl7 120 69 0 64 1 0 1 1 0 8 0 amappl6 112 58 0 50 1 0 1 1 0 8 0 amappl5 104 117 0 102 1 0 1 1 0 8 0 amappl4 96 654 0 624 2 1 1 2 0 8 0 amappl3 88 126 0 119 1 0 1 1 0 8 0 amappl2 80 2681 0 2623 2 0 2 2 0 8 0 amappl1 72 18668 0 18224 25 15 10 20 0 8 0 amappl 72 1155 0 1120 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 12 0 3 1 0 1 1 0 8 0 uaddrrnd 24 426 0 410 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 426 0 410 1 0 1 1 0 8 0 vmmpekpl 168 7596 0 7570 2 0 2 2 0 8 0 vmmpepl 168 52864 0 51414 93 19 74 79 0 357 8 vmsppl 360 425 0 410 2 0 2 2 0 8 0 pdppl 4096 860 0 820 6 0 6 6 0 8 0 pvpl 32 177127 0 165310 134 20 114 125 0 265 16 pmappl 224 425 0 410 2 1 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 458 0 4 13 0 13 13 0 8 0