panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 219639 89030 0 0 0 0 syz-executor.0 *240635 89030 0 0 0x4000000 1K syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x174 sys/kern/subr_prf.c:208 krpc_get_xid() at krpc_get_xid 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(fffffd807c594a18,80085761,ffff800020c257b0,82,fffffd807f7c68a0,ffff800020b6d090) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806cbc5600,80085761,ffff800020c257b0,ffff800020b6d090) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b6d090,ffff800020c258f8,ffff800020c258e0) at sys_ioctl+0x651 syscall(ffff800020c25990) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c25990) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,3505de8a010) at Xsyscall+0x128 end of kernel end trace frame: 0x352f0d82ef0, 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 krpc_get_xid() at krpc_get_xid 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(fffffd807c594a18,80085761,ffff800020c257b0,82,fffffd807f7c68a0,ffff800020b6d090) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806cbc5600,80085761,ffff800020c257b0,ffff800020b6d090) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b6d090,ffff800020c258f8,ffff800020c258e0) at sys_ioctl+0x651 syscall(ffff800020c25990) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c25990) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,3505de8a010) at Xsyscall+0x128 end of kernel end trace frame: 0x352f0d82ef0, count: -10 ddb{1}> show registers rdi 0xffffffff81a9fb17 db_enter+0x17 rsi 0x15b3 __ALIGN_SIZE+0x5b3 rbp 0xffff800020c253f0 rbx 0xffff800020c254a0 rdx 0x15b4 __ALIGN_SIZE+0x5b4 rcx 0xffff800000966000 rax 0xffff800000966000 r8 0xffffffff814d1103 kprintf+0x183 r9 0x1 r10 0x25 r11 0x6eb1af342d164d27 r12 0x3000000008 r13 0xffff800020c25400 r14 0x100 r15 0x1 rip 0xffffffff81a9fb18 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c253e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=240635 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b6cbe0,0xffffffff823ac728 process=0xffff800020b7cd38 user=0xffff800020c20000, vmspace=0xfffffd807effd000 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89030 219639 15562 0 7 0 syz-executor.0 *89030 240635 15562 0 7 0x4000000 syz-executor.0 22318 60851 52704 0 3 0x2 biowait syz-executor.1 88954 333214 1 0 3 0x100083 ttyin getty 65297 273247 0 0 3 0x14200 bored sosplice 15562 514299 52704 0 3 0x82 nanosleep syz-executor.0 52704 1091 13940 0 3 0x82 thrsleep syz-fuzzer 52704 516102 13940 0 3 0x4000082 thrsleep syz-fuzzer 52704 53736 13940 0 3 0x4000082 thrsleep syz-fuzzer 52704 197583 13940 0 3 0x4000082 thrsleep syz-fuzzer 52704 365727 13940 0 3 0x4000082 thrsleep syz-fuzzer 52704 171164 13940 0 3 0x4000082 thrsleep syz-fuzzer 52704 440550 13940 0 3 0x4000082 kqread syz-fuzzer 52704 244003 13940 0 3 0x4000082 thrsleep syz-fuzzer 52704 262844 13940 0 3 0x4000082 thrsleep syz-fuzzer 52704 27985 13940 0 3 0x4000082 thrsleep syz-fuzzer 52704 203109 13940 0 3 0x4000082 thrsleep syz-fuzzer 13940 308787 57638 0 3 0x10008a pause ksh 57638 226524 56131 0 3 0x92 select sshd 56131 129620 1 0 3 0x80 select sshd 42199 19230 41282 74 3 0x100092 bpf pflogd 41282 191613 1 0 3 0x80 netio pflogd 31886 293178 22637 73 3 0x100090 kqread syslogd 22637 400143 1 0 3 0x100082 netio syslogd 46877 96244 1 77 3 0x100090 poll dhclient 42007 57763 1 0 3 0x80 poll dhclient 91422 27982 0 0 3 0x14200 pgzero zerothread 7538 24436 0 0 3 0x14200 aiodoned aiodoned 79876 68001 0 0 3 0x14200 syncer update 2888 491689 0 0 3 0x14200 cleaner cleaner 37557 17551 0 0 3 0x14200 reaper reaper 91269 514125 0 0 3 0x14200 pgdaemon pagedaemon 94883 292653 0 0 3 0x14200 bored crynlk 28745 444498 0 0 3 0x14200 bored crypto 32557 301058 0 0 3 0x40014200 acpi0 acpi0 78085 498855 0 0 3 0x40014200 idle1 35697 23347 0 0 3 0x14200 bored softnet 77036 16708 0 0 3 0x14200 bored systqmp 26214 417889 0 0 3 0x14200 bored systq 61172 286491 0 0 3 0x40014200 bored softclock 59836 244332 0 0 3 0x40014200 idle0 47074 58677 0 0 3 0x14200 bored smr 1 93366 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 89030 (syz-executor.0) thread 0xffff800020b6d090 (240635) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff823bdc30) 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 22318 (syz-executor.1) thread 0xffff800020b6c028 (60851) exclusive rrwlock inode r = 0 (0xfffffd807c1fc708) 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 (0xfffffd807e7365e8) 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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9526 6450K 6468K 78643K 11395 0 0 pcb 25 9K 11K 78643K 1128 0 0 rtable 100 3K 4K 78643K 968 0 0 ifaddr 59 14K 15K 78643K 421 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1525 0 0 iov 0 0K 28K 78643K 301 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1191 75K 76K 78643K 2500 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 41 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 315 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 25K 78643K 2354 0 0 sigio 0 0K 0K 78643K 13 0 0 proc 54 51K 83K 78643K 1604 0 0 subproc 64 65538K 67586K 78643K 308 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 280 0 0 in_multi 33 2K 2K 78643K 177 0 0 ether_multi 1 0K 0K 78643K 10 0 0 mrt 0 0K 0K 78643K 12 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 90 397K 397K 78643K 90 0 0 exec 0 0K 1K 78643K 411 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 100 21K 30K 78643K 8450 0 0 UVM aobj 116 5K 5K 78643K 121 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 107 0 0 NDP 12 0K 0K 78643K 123 0 0 temp 172 2379K 3018K 78643K 9763 0 0 kqueue 0 0K 0K 78643K 29 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 1295 0 1288 1 0 1 1 0 8 0 plimitpl 152 108 0 100 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 106 0 66 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 470 0 466 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 61 0 61 13 12 1 1 0 8 1 pffrent 40 2 0 2 1 1 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 39 0 23 1 0 1 1 0 8 0 pfstkey 112 39 0 23 1 0 1 1 0 8 0 pfstate 328 39 0 23 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 256 492 0 304 12 0 12 12 0 8 0 art_table 32 493 0 304 2 0 2 2 0 8 0 art_node 16 105 0 71 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 312 0 302 1 0 1 1 0 8 0 shmpl 112 119 0 5 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 5656 0 4223 47 0 47 47 0 8 0 ffsino 272 5656 0 4223 96 0 96 96 0 8 0 nchpl 144 9298 0 7680 61 0 61 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 200 5926 0 0 312 0 312 312 0 8 0 namei 1024 29079 0 29078 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 11 0 11 5 5 0 1 0 8 0 scxspl 192 32324 0 32323 18 17 1 6 0 8 0 sigapl 432 2533 0 2518 3 1 2 3 0 8 0 futexpl 56 28034 0 28034 1 0 1 1 0 8 1 knotepl 112 699 0 672 9 7 2 2 0 8 1 kqueuepl 104 660 0 658 1 0 1 1 0 8 0 pipepl 112 1572 0 1553 5 4 1 2 0 8 0 fdescpl 488 2534 0 2518 3 0 3 3 0 8 0 filepl 152 16069 0 15969 11 6 5 7 0 8 1 lockfpl 104 786 0 785 6 5 1 1 0 8 0 lockfspl 32 1121 0 1120 6 5 1 1 0 8 0 sessionpl 112 29 0 18 1 0 1 1 0 8 0 pgrppl 48 62 0 51 1 0 1 1 0 8 0 ucredpl 96 4319 0 4310 1 0 1 1 0 8 0 zombiepl 144 2518 0 2518 3 2 1 1 0 8 1 processpl 840 2550 0 2518 4 0 4 4 0 8 0 procpl 600 7539 0 7496 6 1 5 5 0 8 0 srpgc 64 44 0 44 2 2 0 1 0 8 0 sosppl 128 49 0 49 9 9 0 1 0 8 0 sockpl 384 2302 0 2283 8 5 3 4 0 8 1 mcl64k 65536 474 0 0 54 7 47 47 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 116 0 0 14 1 13 14 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 589 0 0 27 0 27 27 0 8 0 bufpl 256 10730 0 3742 437 0 437 437 0 8 0 anonpl 16 291164 0 282273 121 68 53 53 0 125 11 amapchunkpl 152 15119 0 15032 30 21 9 9 0 158 4 amappl16 192 13236 0 12749 133 100 33 37 0 8 8 amappl15 184 1155 0 1154 1 0 1 1 0 8 0 amappl14 176 1164 0 1156 1 0 1 1 0 8 0 amappl13 168 48 0 45 1 0 1 1 0 8 0 amappl12 160 1150 0 1143 1 0 1 1 0 8 0 amappl11 152 1266 0 1252 1 0 1 1 0 8 0 amappl10 144 84 0 81 1 0 1 1 0 8 0 amappl9 136 1393 0 1390 1 0 1 1 0 8 0 amappl8 128 221 0 193 1 0 1 1 0 8 0 amappl7 120 42 0 38 1 0 1 1 0 8 0 amappl6 112 1196 0 1187 1 0 1 1 0 8 0 amappl5 104 286 0 271 1 0 1 1 0 8 0 amappl4 96 348 0 324 2 1 1 2 0 8 0 amappl3 88 228 0 223 1 0 1 1 0 8 0 amappl2 80 22631 0 22577 2 0 2 2 0 8 0 amappl1 72 65533 0 65084 25 15 10 19 0 8 0 amappl 72 7855 0 7820 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 64 120 0 5 2 0 2 2 0 8 0 uaddrrnd 24 2534 0 2518 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2534 0 2518 1 0 1 1 0 8 0 vmmpekpl 168 23683 0 23658 2 0 2 2 0 8 0 vmmpepl 168 283661 0 282157 142 62 80 83 0 357 10 vmsppl 360 2533 0 2518 2 0 2 2 0 8 0 pdppl 4096 5076 0 5036 6 0 6 6 0 8 0 pvpl 32 825908 0 813810 251 115 136 143 0 265 31 pmappl 224 2533 0 2518 2 1 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 663 0 12 19 0 19 19 0 8 0