panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 310567 55610 0 0 0 0 syz-executor.1 * 2242 55610 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 sys_mount(ffffffff80000000,8,2) at sys_mount 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(fffffd807bea6ab0,80085761,ffff800020c673d0,42,fffffd807f7c69c0,ffff800020b39530) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd8069020738,80085761,ffff800020c673d0,ffff800020b39530) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b39530,ffff800020c67518,ffff800020c67500) at sys_ioctl+0x651 syscall(ffff800020c675b0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c675b0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,fa3ba6aa010) at Xsyscall+0x128 end of kernel end trace frame: 0xfa5d57f8160, 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 sys_mount(ffffffff80000000,8,2) at sys_mount 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(fffffd807bea6ab0,80085761,ffff800020c673d0,42,fffffd807f7c69c0,ffff800020b39530) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd8069020738,80085761,ffff800020c673d0,ffff800020b39530) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b39530,ffff800020c67518,ffff800020c67500) at sys_ioctl+0x651 syscall(ffff800020c675b0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c675b0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,fa3ba6aa010) at Xsyscall+0x128 end of kernel end trace frame: 0xfa5d57f8160, count: -10 ddb{1}> show registers rdi 0xffffffff81d05a07 db_enter+0x17 rsi 0x1292 __ALIGN_SIZE+0x292 rbp 0xffff800020c67010 rbx 0xffff800020c670c0 rdx 0x1293 __ALIGN_SIZE+0x293 rcx 0xffff800002b66000 rax 0xffff800002b66000 r8 0xffffffff81a188b3 kprintf+0x183 r9 0x1 r10 0x25 r11 0x97294a5c914743bf r12 0x3000000008 r13 0xffff800020c67020 r14 0x100 r15 0x1 rip 0xffffffff81d05a08 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c67000 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=2242 stat=onproc flags process=0 proc=4000000 pri=78, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff800020b39788,0xffffffff82369218 process=0xffff800020b8c9f0 user=0xffff800020c62000, vmspace=0xfffffd807effe5a0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55610 310567 81448 0 7 0 syz-executor.1 *55610 2242 81448 0 7 0x4000000 syz-executor.1 57446 476338 13975 0 2 0 syz-executor.0 57446 254234 13975 0 3 0x4000080 bell syz-executor.0 47987 324409 0 0 3 0x14200 bored sosplice 43370 462872 1 0 3 0x100083 ttyin getty 81448 198985 87450 0 3 0x82 nanosleep syz-executor.1 13975 30093 87450 0 3 0x82 nanosleep syz-executor.0 87450 228186 28550 0 3 0x82 thrsleep syz-fuzzer 87450 353952 28550 0 3 0x4000082 thrsleep syz-fuzzer 87450 125447 28550 0 3 0x4000082 thrsleep syz-fuzzer 87450 213347 28550 0 3 0x4000082 thrsleep syz-fuzzer 87450 436568 28550 0 3 0x4000082 thrsleep syz-fuzzer 87450 462982 28550 0 3 0x4000082 thrsleep syz-fuzzer 87450 270513 28550 0 3 0x4000082 thrsleep syz-fuzzer 87450 507785 28550 0 3 0x4000082 thrsleep syz-fuzzer 87450 493107 28550 0 3 0x4000082 thrsleep syz-fuzzer 87450 338585 28550 0 3 0x4000082 thrsleep syz-fuzzer 87450 501863 28550 0 3 0x4000082 kqread syz-fuzzer 28550 518887 22954 0 3 0x10008a pause ksh 22954 212406 84818 0 3 0x92 select sshd 84818 291637 1 0 3 0x80 select sshd 67235 385331 93554 74 3 0x100092 bpf pflogd 93554 271233 1 0 3 0x80 netio pflogd 64113 351222 8597 73 3 0x100090 kqread syslogd 8597 289936 1 0 3 0x100082 netio syslogd 25295 93619 1 77 3 0x100090 poll dhclient 2638 211900 1 0 3 0x80 poll dhclient 58890 69166 0 0 2 0x14200 zerothread 51265 308959 0 0 3 0x14200 aiodoned aiodoned 23902 302554 0 0 3 0x14200 syncer update 49568 330335 0 0 3 0x14200 cleaner cleaner 72316 388543 0 0 3 0x14200 reaper reaper 30871 392663 0 0 3 0x14200 pgdaemon pagedaemon 35506 187668 0 0 3 0x14200 bored crynlk 32202 58218 0 0 3 0x14200 bored crypto 19852 360986 0 0 3 0x40014200 acpi0 acpi0 32879 131009 0 0 3 0x40014200 idle1 11506 49282 0 0 3 0x14200 bored softnet 84918 412500 0 0 3 0x14200 bored systqmp 1866 415474 0 0 3 0x14200 bored systq 24830 6659 0 0 3 0x40014200 bored softclock 89019 401956 0 0 3 0x40014200 idle0 45574 348971 0 0 3 0x14200 bored smr 1 127529 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 55610 (syz-executor.1) thread 0xffff800020b39530 (2242) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82368840) locked @ /syzkaller/managers/pf/kernel/sys/sys/syscall_mi.h:90 #0 witness_lock+0x594 sys/kern/subr_witness.c:1205 #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 9514 6411K 6428K 78643K 10911 0 0 pcb 25 9K 10K 78643K 463 0 0 rtable 100 3K 4K 78643K 381 0 0 ifaddr 56 13K 14K 78643K 168 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1478 0 0 iov 0 0K 32K 78643K 81 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1194 75K 75K 78643K 1656 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 56 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 6 17K 25K 78643K 806 0 0 sigio 0 0K 0K 78643K 20 0 0 proc 54 51K 83K 78643K 485 0 0 subproc 64 65538K 67586K 78643K 68 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 89 0 0 in_multi 33 2K 2K 78643K 74 0 0 ether_multi 1 0K 0K 78643K 6 0 0 mrt 0 0K 0K 78643K 8 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 78 344K 344K 78643K 78 0 0 exec 0 0K 1K 78643K 256 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 93 21K 29K 78643K 3432 0 0 UVM aobj 47 4K 4K 78643K 51 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 23 0 0 NDP 11 0K 0K 78643K 45 0 0 temp 163 2375K 2441K 78643K 5287 0 0 kqueue 0 0K 0K 78643K 10 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 4 0 0 1 0 1 1 0 8 0 inpcbpl 280 412 0 405 1 0 1 1 0 8 0 plimitpl 152 31 0 23 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 43 0 3 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 1014 0 1014 1 1 0 1 0 8 0 tcpcb 544 149 0 145 1 0 1 1 0 8 0 rttmr 72 2 0 2 1 1 0 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 swfcl 56 1 0 0 1 0 1 1 0 8 0 ppxss 1128 19 0 19 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 18 0 10 1 0 1 1 0 8 0 pfstkey 112 18 0 10 1 0 1 1 0 8 0 pfstate 328 18 0 10 1 0 1 1 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 256 213 0 28 13 1 12 13 0 8 0 art_table 32 214 0 28 2 0 2 2 0 8 0 art_node 16 42 0 8 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 7 1 0 1 1 0 8 0 semapl 112 54 0 44 1 0 1 1 0 8 0 shmpl 112 49 0 4 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2958 0 1536 47 0 47 47 0 8 0 ffsino 272 2958 0 1536 96 0 96 96 0 8 0 nchpl 144 4302 0 2671 61 0 61 61 0 8 0 uvmvnodes 72 3061 0 0 56 0 56 56 0 8 0 vnodes 200 3061 0 0 162 0 162 162 0 8 0 namei 1024 12865 0 12865 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 2 0 2 1 0 1 1 0 8 1 scxspl 192 12187 0 12187 16 15 1 6 0 8 1 sigapl 432 1003 0 987 3 1 2 3 0 8 0 futexpl 56 9206 0 9206 1 0 1 1 0 8 1 knotepl 112 201 0 174 2 1 1 2 0 8 0 kqueuepl 104 218 0 216 1 0 1 1 0 8 0 pipepl 112 568 0 547 2 1 1 1 0 8 0 fdescpl 488 1004 0 987 5 2 3 3 0 8 0 filepl 152 6017 0 5914 7 2 5 6 0 8 1 lockfpl 104 272 0 271 2 1 1 1 0 8 0 lockfspl 32 321 0 320 2 1 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 23 0 12 1 0 1 1 0 8 0 ucredpl 96 1600 0 1591 1 0 1 1 0 8 0 zombiepl 144 987 0 987 3 2 1 1 0 8 1 processpl 840 1020 0 987 4 0 4 4 0 8 0 procpl 600 2746 0 2701 5 1 4 5 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 4 0 4 2 2 0 1 0 8 0 sockpl 384 800 0 781 4 1 3 3 0 8 1 mcl64k 65536 16 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 123 0 0 13 0 13 13 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 148 0 0 8 0 8 8 0 8 0 bufpl 256 7245 0 1045 388 0 388 388 0 8 0 anonpl 16 109732 0 101850 83 34 49 49 0 125 16 amapchunkpl 152 5915 0 5824 24 16 8 9 0 158 3 amappl16 192 4177 0 3769 60 31 29 33 0 8 8 amappl15 184 379 0 376 1 0 1 1 0 8 0 amappl14 176 442 0 434 1 0 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 419 0 415 1 0 1 1 0 8 0 amappl11 152 591 0 576 1 0 1 1 0 8 0 amappl10 144 71 0 66 1 0 1 1 0 8 0 amappl9 136 359 0 356 1 0 1 1 0 8 0 amappl8 128 142 0 121 1 0 1 1 0 8 0 amappl7 120 28 0 25 1 0 1 1 0 8 0 amappl6 112 469 0 459 1 0 1 1 0 8 0 amappl5 104 510 0 493 1 0 1 1 0 8 0 amappl4 96 314 0 291 2 1 1 2 0 8 0 amappl3 88 157 0 150 1 0 1 1 0 8 0 amappl2 80 8193 0 8127 3 1 2 2 0 8 0 amappl1 72 31947 0 31493 27 18 9 19 0 8 0 amappl 72 2988 0 2951 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 50 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1004 0 987 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1004 0 987 1 0 1 1 0 8 0 vmmpekpl 168 11904 0 11883 2 0 2 2 0 8 0 vmmpepl 168 112885 0 111380 141 63 78 78 0 357 12 vmsppl 360 1003 0 987 2 0 2 2 0 8 0 pdppl 4096 2016 0 1974 8 2 6 6 0 8 0 pvpl 32 322921 0 311782 212 84 128 128 0 265 36 pmappl 224 1003 0 987 2 1 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 542 0 7 16 0 16 16 0 8 0