panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 429051 67914 0 0 0 0 syz-executor.1 *299323 67914 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 admtemp_match(ffffffff80000000,8,2) at admtemp_match 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(fffffd806623bc30,80085761,ffff800020c20e60,42,fffffd807f7c6a20,ffff800020b8a978) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806877eef0,80085761,ffff800020c20e60,ffff800020b8a978) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b8a978,ffff800020c20fa8,ffff800020c20f90) at sys_ioctl+0x651 syscall(ffff800020c21040) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c21040) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,3c9a3500010) at Xsyscall+0x128 end of kernel end trace frame: 0x3cc1fcf9120, 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 admtemp_match(ffffffff80000000,8,2) at admtemp_match 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(fffffd806623bc30,80085761,ffff800020c20e60,42,fffffd807f7c6a20,ffff800020b8a978) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806877eef0,80085761,ffff800020c20e60,ffff800020b8a978) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b8a978,ffff800020c20fa8,ffff800020c20f90) at sys_ioctl+0x651 syscall(ffff800020c21040) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c21040) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,3c9a3500010) at Xsyscall+0x128 end of kernel end trace frame: 0x3cc1fcf9120, count: -10 ddb{1}> show registers rdi 0xffffffff81a91937 db_enter+0x17 rsi 0x1427 __ALIGN_SIZE+0x427 rbp 0xffff800020c20aa0 rbx 0xffff800020c20b50 rdx 0x1428 __ALIGN_SIZE+0x428 rcx 0xffff80000359d000 rax 0xffff80000359d000 r8 0xffffffff81ad1df3 kprintf+0x183 r9 0x1 r10 0x25 r11 0xf34b9c5137465b3f r12 0x3000000008 r13 0xffff800020c20ab0 r14 0x100 r15 0x1 rip 0xffffffff81a91938 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c20a90 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=299323 stat=onproc flags process=0 proc=4000000 pri=76, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff800020b8b9e0,0xffff800020b8ae38 process=0xffff800020aeba48 user=0xffff800020c1c000, vmspace=0xfffffd806e81d2d8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 87483 303238 73075 0 2 0 syz-executor.0 67914 429051 72789 0 7 0 syz-executor.1 *67914 299323 72789 0 7 0x4000000 syz-executor.1 72789 458896 94158 0 3 0x82 nanosleep syz-executor.1 73075 286653 94158 0 3 0x82 nanosleep syz-executor.0 17804 512431 1 0 3 0x100083 ttyin getty 26585 460985 0 0 3 0x14200 bored sosplice 94158 157403 14253 0 3 0x82 kqread syz-fuzzer 94158 195262 14253 0 3 0x4000082 nanosleep syz-fuzzer 94158 119392 14253 0 3 0x4000082 thrsleep syz-fuzzer 94158 188835 14253 0 3 0x4000082 thrsleep syz-fuzzer 94158 260857 14253 0 3 0x4000082 thrsleep syz-fuzzer 94158 448503 14253 0 3 0x4000082 thrsleep syz-fuzzer 94158 404175 14253 0 3 0x4000082 thrsleep syz-fuzzer 94158 331760 14253 0 3 0x4000082 thrsleep syz-fuzzer 94158 60482 14253 0 3 0x4000082 thrsleep syz-fuzzer 94158 478943 14253 0 3 0x4000082 nanosleep syz-fuzzer 14253 140432 28012 0 3 0x10008a pause ksh 28012 379725 25485 0 3 0x92 select sshd 25485 95034 1 0 3 0x80 select sshd 90752 97530 96168 74 3 0x100092 bpf pflogd 96168 122068 1 0 3 0x80 netio pflogd 31659 477144 49192 73 3 0x100090 kqread syslogd 49192 171592 1 0 3 0x100082 netio syslogd 15731 345658 1 77 3 0x100090 poll dhclient 61473 230306 1 0 3 0x80 poll dhclient 86829 413416 0 0 3 0x14200 pgzero zerothread 8040 3189 0 0 3 0x14200 aiodoned aiodoned 84497 223329 0 0 3 0x14200 syncer update 5330 322668 0 0 3 0x14200 cleaner cleaner 46470 349290 0 0 3 0x14200 reaper reaper 86429 397732 0 0 3 0x14200 pgdaemon pagedaemon 97223 289116 0 0 3 0x14200 bored crynlk 30256 76268 0 0 3 0x14200 bored crypto 96567 367183 0 0 3 0x40014200 acpi0 acpi0 28714 466361 0 0 3 0x40014200 idle1 90560 472040 0 0 3 0x14200 bored softnet 14832 296897 0 0 3 0x14200 bored systqmp 6613 281320 0 0 3 0x14200 bored systq 55735 272669 0 0 3 0x40014200 bored softclock 33427 398123 0 0 3 0x40014200 idle0 2654 71573 0 0 3 0x14200 bored smr 1 320587 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 67914 (syz-executor.1) thread 0xffff800020b8a978 (299323) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82360b08) 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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9530 6424K 6432K 78643K 11037 0 0 pcb 25 9K 10K 78643K 560 0 0 rtable 100 3K 4K 78643K 770 0 0 ifaddr 62 15K 15K 78643K 284 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1490 0 0 iov 0 0K 24K 78643K 135 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1198 75K 76K 78643K 1830 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 15 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 161 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 6 17K 25K 78643K 1037 0 0 sigio 0 0K 0K 78643K 11 0 0 proc 54 51K 71K 78643K 687 0 0 subproc 64 65538K 67586K 78643K 378 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 102 0 0 in_multi 33 2K 2K 78643K 175 0 0 ether_multi 1 0K 0K 78643K 12 0 0 mrt 0 0K 0K 78643K 1 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 328 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 90 21K 30K 78643K 4247 0 0 UVM aobj 75 3K 3K 78643K 87 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 57 0 0 NDP 13 0K 0K 78643K 88 0 0 temp 178 2375K 2444K 78643K 6630 0 0 kqueue 0 0K 0K 78643K 5 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 13 0 9 1 0 1 1 0 8 0 inpcbpl 280 615 0 608 1 0 1 1 0 8 0 plimitpl 152 58 0 50 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 124 0 84 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 544 204 0 200 1 0 1 1 0 8 0 nd6 48 22 0 18 1 0 1 1 0 8 0 ppxss 1128 32 0 32 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 30 0 21 1 0 1 1 0 8 0 pfstkey 112 30 0 21 1 0 1 1 0 8 0 pfstate 328 30 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 256 580 0 391 12 0 12 12 0 8 0 art_table 32 581 0 391 2 0 2 2 0 8 0 art_node 16 121 0 87 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 7 1 0 1 1 0 8 0 semapl 112 159 0 149 1 0 1 1 0 8 0 shmpl 112 85 0 12 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3225 0 1758 48 0 48 48 0 8 0 ffsino 272 3225 0 1758 99 0 99 99 0 8 0 nchpl 144 4887 0 3219 62 0 62 62 0 8 0 uvmvnodes 72 3495 0 0 64 0 64 64 0 8 0 vnodes 200 3495 0 0 184 0 184 184 0 8 0 namei 1024 14980 0 14980 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 14824 0 14824 17 16 1 6 0 8 1 sigapl 432 1212 0 1196 3 1 2 3 0 8 0 futexpl 56 12032 0 12032 1 0 1 1 0 8 1 knotepl 112 414 0 395 1 0 1 1 0 8 0 kqueuepl 104 260 0 258 1 0 1 1 0 8 0 pipepl 112 766 0 745 2 1 1 1 0 8 0 fdescpl 488 1213 0 1196 3 0 3 3 0 8 0 filepl 152 7252 0 7150 6 1 5 6 0 8 1 lockfpl 104 395 0 394 2 1 1 1 0 8 0 lockfspl 32 480 0 479 2 1 1 1 0 8 0 sessionpl 112 30 0 19 1 0 1 1 0 8 0 pgrppl 48 45 0 34 1 0 1 1 0 8 0 ucredpl 96 1479 0 1470 1 0 1 1 0 8 0 zombiepl 144 1196 0 1196 2 1 1 1 0 8 1 processpl 840 1229 0 1196 4 0 4 4 0 8 0 procpl 600 3321 0 3278 4 0 4 4 0 8 0 srpgc 64 52 0 52 7 7 0 1 0 8 0 sosppl 128 11 0 11 4 4 0 1 0 8 0 sockpl 384 1084 0 1065 3 0 3 3 0 8 1 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 122 0 0 14 0 14 14 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 173 0 0 8 0 8 8 0 8 0 bufpl 256 8552 0 1529 440 0 440 440 0 8 0 anonpl 16 149970 0 141262 81 30 51 52 0 125 13 amapchunkpl 152 7571 0 7482 22 16 6 9 0 158 1 amappl16 192 6051 0 5589 65 33 32 36 0 8 8 amappl15 184 63 0 58 1 0 1 1 0 8 0 amappl14 176 206 0 201 2 1 1 1 0 8 0 amappl13 168 259 0 255 1 0 1 1 0 8 0 amappl12 160 205 0 203 1 0 1 1 0 8 0 amappl11 152 182 0 167 1 0 1 1 0 8 0 amappl10 144 410 0 406 1 0 1 1 0 8 0 amappl9 136 633 0 629 1 0 1 1 0 8 0 amappl8 128 200 0 182 1 0 1 1 0 8 0 amappl7 120 332 0 326 1 0 1 1 0 8 0 amappl6 112 222 0 215 1 0 1 1 0 8 0 amappl5 104 327 0 313 1 0 1 1 0 8 0 amappl4 96 1522 0 1493 2 1 1 2 0 8 0 amappl3 88 307 0 302 1 0 1 1 0 8 0 amappl2 80 9309 0 9252 2 0 2 2 0 8 0 amappl1 72 35973 0 35531 26 16 10 20 0 8 0 amappl 72 3654 0 3617 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 86 0 12 2 0 2 2 0 8 0 uaddrrnd 24 1213 0 1196 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1213 0 1196 1 0 1 1 0 8 0 vmmpekpl 168 14099 0 14078 2 0 2 2 0 8 0 vmmpepl 168 137292 0 135778 124 45 79 85 0 357 10 vmsppl 360 1212 0 1196 2 0 2 2 0 8 0 pdppl 4096 2434 0 2392 6 0 6 6 0 8 0 pvpl 32 414196 0 402201 187 51 136 136 0 265 34 pmappl 224 1212 0 1196 3 2 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 594 0 4 17 0 17 17 0 8 0