panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 306273 65406 0 0 0 0 syz-executor.1 *254468 65406 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 msdosfs_init(ffffffff80000000) at msdosfs_init 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(fffffd80660c0be0,80085761,ffff800020c1af20,3,fffffd807f7c67e0,ffff800020b29080) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806712f608,80085761,ffff800020c1af20,ffff800020b29080) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b29080,ffff800020c1b068,ffff800020c1b050) at sys_ioctl+0x651 syscall(ffff800020c1b100) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c1b100) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,2b07bd43010) at Xsyscall+0x128 end of kernel end trace frame: 0x2b32c83a1b0, 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 msdosfs_init(ffffffff80000000) at msdosfs_init 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(fffffd80660c0be0,80085761,ffff800020c1af20,3,fffffd807f7c67e0,ffff800020b29080) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806712f608,80085761,ffff800020c1af20,ffff800020b29080) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b29080,ffff800020c1b068,ffff800020c1b050) at sys_ioctl+0x651 syscall(ffff800020c1b100) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c1b100) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,2b07bd43010) at Xsyscall+0x128 end of kernel end trace frame: 0x2b32c83a1b0, count: -10 ddb{1}> show registers rdi 0xffffffff81a67857 db_enter+0x17 rsi 0x144b __ALIGN_SIZE+0x44b rbp 0xffff800020c1ab60 rbx 0xffff800020c1ac10 rdx 0x144c __ALIGN_SIZE+0x44c rcx 0xffff800001766000 rax 0xffff800001766000 r8 0xffffffff81127ab3 kprintf+0x183 r9 0x1 r10 0x25 r11 0x5e09d035a0848511 r12 0x3000000008 r13 0xffff800020c1ab70 r14 0x100 r15 0x1 rip 0xffffffff81a67858 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c1ab50 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=254468 stat=onproc flags process=0 proc=4000000 pri=76, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff800020b292d8,0xffffffff823c0260 process=0xffff800020b7c9f0 user=0xffff800020c16000, vmspace=0xfffffd807effeca8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65406 306273 27392 0 7 0 syz-executor.1 *65406 254468 27392 0 7 0x4000000 syz-executor.1 94422 185677 68606 0 3 0x2 biowait syz-executor.0 63282 496679 1 0 3 0x100083 ttyin getty 27392 106456 68606 0 3 0x82 nanosleep syz-executor.1 46599 510168 0 0 3 0x14200 bored sosplice 68606 398507 25154 0 3 0x82 thrsleep syz-fuzzer 68606 330747 25154 0 3 0x4000082 nanosleep syz-fuzzer 68606 507972 25154 0 3 0x4000082 thrsleep syz-fuzzer 68606 52706 25154 0 3 0x4000082 thrsleep syz-fuzzer 68606 3282 25154 0 3 0x4000082 thrsleep syz-fuzzer 68606 58686 25154 0 3 0x4000082 thrsleep syz-fuzzer 68606 459971 25154 0 3 0x4000082 thrsleep syz-fuzzer 68606 154258 25154 0 3 0x4000082 thrsleep syz-fuzzer 68606 459390 25154 0 3 0x4000082 thrsleep syz-fuzzer 68606 337989 25154 0 3 0x4000082 kqread syz-fuzzer 25154 514766 55462 0 3 0x10008a pause ksh 55462 29251 22364 0 3 0x92 select sshd 22364 410293 1 0 3 0x80 select sshd 15128 365752 78120 74 3 0x100092 bpf pflogd 78120 387519 1 0 3 0x80 netio pflogd 9628 520566 54089 73 3 0x100090 kqread syslogd 54089 30963 1 0 3 0x100082 netio syslogd 54674 56254 1 77 3 0x100090 poll dhclient 68915 19695 1 0 3 0x80 poll dhclient 53131 24542 0 0 3 0x14200 pgzero zerothread 91629 439891 0 0 3 0x14200 aiodoned aiodoned 41360 2477 0 0 3 0x14200 syncer update 23276 293685 0 0 3 0x14200 cleaner cleaner 43051 495573 0 0 3 0x14200 reaper reaper 49191 258513 0 0 3 0x14200 pgdaemon pagedaemon 67329 283715 0 0 3 0x14200 bored crynlk 13724 281128 0 0 3 0x14200 bored crypto 77066 313450 0 0 3 0x40014200 acpi0 acpi0 95180 222975 0 0 3 0x40014200 idle1 31526 463352 0 0 3 0x14200 bored softnet 17475 384990 0 0 3 0x14200 bored systqmp 76404 516259 0 0 3 0x14200 bored systq 54485 223732 0 0 3 0x40014200 bored softclock 86130 374032 0 0 3 0x40014200 idle0 46348 171953 0 0 3 0x14200 bored smr 1 507745 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 65406 (syz-executor.1) thread 0xffff800020b29080 (254468) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff823bb6d0) 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 94422 (syz-executor.0) thread 0xffff800020b28bd0 (185677) exclusive rrwlock inode r = 0 (0xfffffd80673762c8) 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 (0xfffffd8067376d68) 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 9521 6442K 6459K 78643K 10888 0 0 pcb 27 9K 10K 78643K 426 0 0 rtable 100 3K 4K 78643K 575 0 0 ifaddr 58 13K 14K 78643K 184 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1489 0 0 iov 0 0K 24K 78643K 85 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1191 75K 76K 78643K 1587 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 116 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 21K 78643K 749 0 0 sigio 0 0K 0K 78643K 9 0 0 proc 54 51K 79K 78643K 600 0 0 subproc 64 65538K 67586K 78643K 306 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 109 0 0 in_multi 33 2K 2K 78643K 134 0 0 ether_multi 1 0K 0K 78643K 6 0 0 mrt 0 0K 0K 78643K 9 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 54 238K 238K 78643K 54 0 0 exec 0 0K 1K 78643K 300 0 0 pfkey data 0 0K 0K 78643K 2 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 91 21K 30K 78643K 3343 0 0 UVM aobj 45 2K 2K 78643K 46 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 36 0 0 NDP 12 0K 0K 78643K 59 0 0 temp 172 2379K 2447K 78643K 5488 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 11 0 7 1 0 1 1 0 8 0 inpcbpl 280 436 0 429 1 0 1 1 0 8 0 plimitpl 152 43 0 35 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 109 0 69 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 8 0 8 1 1 0 1 0 8 0 tcpcb 544 121 0 117 1 0 1 1 0 8 0 rttmr 72 2 0 2 2 2 0 1 0 8 0 nd6 48 18 0 14 1 0 1 1 0 8 0 ppxss 1128 16 0 16 5 5 0 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 34 0 21 1 0 1 1 0 8 0 pfstkey 112 34 0 21 1 0 1 1 0 8 0 pfstate 328 34 0 21 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 256 482 0 293 12 0 12 12 0 8 0 art_table 32 483 0 293 2 0 2 2 0 8 0 art_node 16 105 0 71 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 6 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 112 0 102 1 0 1 1 0 8 0 shmpl 112 44 0 1 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2633 0 1207 47 0 47 47 0 8 0 ffsino 272 2633 0 1207 96 0 96 96 0 8 0 nchpl 144 3922 0 2287 62 0 62 62 0 8 0 uvmvnodes 72 2848 0 0 52 0 52 52 0 8 0 vnodes 200 2848 0 0 150 0 150 150 0 8 0 namei 1024 12028 0 12028 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 2 0 2 2 2 0 1 0 8 0 scxspl 192 11766 0 11765 11 10 1 6 0 8 0 sigapl 432 926 0 911 2 0 2 2 0 8 0 futexpl 56 8318 0 8318 1 0 1 1 0 8 1 knotepl 112 310 0 283 2 1 1 2 0 8 0 kqueuepl 104 185 0 183 1 0 1 1 0 8 0 pipepl 112 670 0 651 3 2 1 2 0 8 0 fdescpl 488 927 0 911 3 0 3 3 0 8 0 filepl 152 5711 0 5609 6 1 5 6 0 8 1 lockfpl 104 243 0 243 2 1 1 1 0 8 1 lockfspl 32 108 0 108 2 1 1 1 0 8 1 sessionpl 112 27 0 16 1 0 1 1 0 8 0 pgrppl 48 41 0 30 1 0 1 1 0 8 0 ucredpl 96 922 0 913 1 0 1 1 0 8 0 zombiepl 144 911 0 911 2 1 1 1 0 8 1 processpl 840 943 0 911 4 0 4 4 0 8 0 procpl 600 2494 0 2452 4 0 4 4 0 8 0 srpgc 64 44 0 44 5 5 0 1 0 8 0 sosppl 128 21 0 21 5 4 1 1 0 8 1 sockpl 384 785 0 764 3 0 3 3 0 8 0 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 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 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 115 0 0 14 0 14 14 0 8 0 mtagpl 80 3 0 0 1 0 1 1 0 8 0 mbufpl 256 181 0 0 8 0 8 8 0 8 0 bufpl 256 7254 0 1052 388 0 388 388 0 8 0 anonpl 16 112140 0 103539 73 26 47 53 0 125 9 amapchunkpl 152 5482 0 5394 17 12 5 9 0 158 1 amappl16 192 4880 0 4406 68 35 33 36 0 8 8 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 46 0 39 1 0 1 1 0 8 0 amappl13 168 141 0 136 1 0 1 1 0 8 0 amappl12 160 270 0 268 2 1 1 1 0 8 0 amappl11 152 281 0 267 1 0 1 1 0 8 0 amappl10 144 72 0 67 1 0 1 1 0 8 0 amappl9 136 451 0 448 1 0 1 1 0 8 0 amappl8 128 420 0 400 1 0 1 1 0 8 0 amappl7 120 384 0 377 1 0 1 1 0 8 0 amappl6 112 75 0 69 1 0 1 1 0 8 0 amappl5 104 142 0 128 1 0 1 1 0 8 0 amappl4 96 342 0 317 2 1 1 2 0 8 0 amappl3 88 196 0 190 1 0 1 1 0 8 0 amappl2 80 7561 0 7501 2 0 2 2 0 8 0 amappl1 72 29808 0 29370 24 14 10 19 0 8 0 amappl 72 2798 0 2763 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 45 0 1 1 0 1 1 0 8 0 uaddrrnd 24 927 0 911 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 927 0 911 1 0 1 1 0 8 0 vmmpekpl 168 11839 0 11816 2 0 2 2 0 8 0 vmmpepl 168 108470 0 106998 109 31 78 81 0 357 7 vmsppl 360 926 0 911 2 0 2 2 0 8 0 pdppl 4096 1862 0 1822 6 0 6 6 0 8 0 pvpl 32 322347 0 310534 161 38 123 137 0 265 21 pmappl 224 926 0 911 2 1 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 540 0 4 16 0 16 16 0 8 0