login: panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 283430 39436 0 0 0 1 syz-executor.0 *348182 39436 0 0 0x4000000 0K syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x174 sys/kern/subr_prf.c:208 sema_init(ffffffff80000000,8,2,2) at sema_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(fffffd8068a847d0,80085761,ffff800020c5d330,82,fffffd807f7c6a20,ffff800020b60e28) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd807cf1f4e0,80085761,ffff800020c5d330,ffff800020b60e28) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b60e28,ffff800020c5d478,ffff800020c5d460) at sys_ioctl+0x651 syscall(ffff800020c5d510) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c5d510) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,e4058fbb010) at Xsyscall+0x128 end of kernel end trace frame: 0xe4262970610, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic mallocarray: overflow 18446744071562067968 * 8 ddb{0}> 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 sema_init(ffffffff80000000,8,2,2) at sema_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(fffffd8068a847d0,80085761,ffff800020c5d330,82,fffffd807f7c6a20,ffff800020b60e28) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd807cf1f4e0,80085761,ffff800020c5d330,ffff800020b60e28) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b60e28,ffff800020c5d478,ffff800020c5d460) at sys_ioctl+0x651 syscall(ffff800020c5d510) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c5d510) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,e4058fbb010) at Xsyscall+0x128 end of kernel end trace frame: 0xe4262970610, count: -10 ddb{0}> show registers rdi 0xffffffff81215977 db_enter+0x17 rsi 0x1322 __ALIGN_SIZE+0x322 rbp 0xffff800020c5cf70 rbx 0xffff800020c5d020 rdx 0x1323 __ALIGN_SIZE+0x323 rcx 0xffff8000039b8000 rax 0xffff8000039b8000 r8 0xffffffff81471d03 kprintf+0x183 r9 0x1 r10 0x25 r11 0x95439f414f6c6845 r12 0x3000000008 r13 0xffff800020c5cf80 r14 0x100 r15 0x1 rip 0xffffffff81215978 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c5cf60 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=348182 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b60018,0xffffffff82383278 process=0xffff800020b8c9f0 user=0xffff800020c58000, vmspace=0xfffffd807f00b708 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 39436 283430 31422 0 7 0 syz-executor.0 *39436 348182 31422 0 7 0x4000000 syz-executor.0 31422 430754 2314 0 3 0x82 nanosleep syz-executor.0 86883 99194 2314 0 3 0x82 nanosleep syz-executor.1 56104 210998 1 0 3 0x80 nanosleep init 20469 496035 0 0 3 0x14200 bored sosplice 2314 471318 45341 0 3 0x82 kqread syz-fuzzer 2314 60543 45341 0 3 0x4000082 thrsleep syz-fuzzer 2314 175532 45341 0 3 0x4000082 thrsleep syz-fuzzer 2314 210380 45341 0 3 0x4000082 thrsleep syz-fuzzer 2314 346298 45341 0 3 0x4000082 thrsleep syz-fuzzer 2314 31760 45341 0 3 0x4000082 thrsleep syz-fuzzer 2314 191874 45341 0 3 0x4000082 thrsleep syz-fuzzer 2314 435795 45341 0 3 0x4000082 thrsleep syz-fuzzer 2314 232319 45341 0 3 0x4000082 thrsleep syz-fuzzer 2314 513445 45341 0 3 0x4000082 thrsleep syz-fuzzer 45341 317001 83890 0 3 0x10008a pause ksh 83890 225075 23199 0 3 0x92 select sshd 23199 496908 1 0 3 0x80 select sshd 35865 2540 52692 74 3 0x100092 bpf pflogd 52692 53634 1 0 3 0x80 netio pflogd 81807 383126 35673 73 3 0x100090 kqread syslogd 35673 102844 1 0 3 0x100082 netio syslogd 38690 50110 1 77 3 0x100090 poll dhclient 43649 9483 1 0 3 0x80 poll dhclient 53391 77981 0 0 3 0x14200 pgzero zerothread 66445 79391 0 0 3 0x14200 aiodoned aiodoned 59655 226340 0 0 3 0x14200 syncer update 71821 424259 0 0 3 0x14200 cleaner cleaner 33025 204861 0 0 3 0x14200 reaper reaper 3601 235447 0 0 3 0x14200 pgdaemon pagedaemon 12460 410507 0 0 3 0x14200 bored crynlk 91066 448715 0 0 3 0x14200 bored crypto 69126 357065 0 0 3 0x40014200 acpi0 acpi0 29199 386335 0 0 3 0x40014200 idle1 95513 190493 0 0 3 0x14200 bored softnet 70277 228458 0 0 3 0x14200 bored systqmp 27278 344656 0 0 3 0x14200 bored systq 28439 309211 0 0 3 0x40014200 bored softclock 14626 28923 0 0 3 0x40014200 idle0 77761 398250 0 0 3 0x14200 bored smr 1 8605 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 39436 (syz-executor.0) thread 0xffff800020b60e28 (348182) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8235f818) 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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9520 6421K 6429K 78643K 10810 0 0 pcb 29 10K 11K 78643K 407 0 0 rtable 100 3K 4K 78643K 464 0 0 ifaddr 59 13K 14K 78643K 164 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1481 0 0 iov 0 0K 24K 78643K 75 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1191 75K 75K 78643K 1586 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 9K 78643K 20 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 1K 1K 78643K 113 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 25K 78643K 667 0 0 sigio 0 0K 0K 78643K 9 0 0 proc 46 38K 83K 78643K 490 0 0 subproc 64 65538K 67586K 78643K 204 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 86 0 0 in_multi 33 2K 2K 78643K 122 0 0 ether_multi 1 0K 0K 78643K 10 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 72 318K 318K 78643K 72 0 0 exec 0 0K 1K 78643K 253 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 80 20K 22K 78643K 3063 0 0 UVM aobj 52 4K 4K 78643K 55 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 41 0 0 NDP 12 0K 0K 78643K 48 0 0 temp 166 2374K 2438K 78643K 5232 0 0 kqueue 0 0K 0K 78643K 14 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 8 0 4 1 0 1 1 0 8 0 inpcbpl 280 401 0 394 1 0 1 1 0 8 0 plimitpl 152 52 0 44 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 79 0 39 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 147 0 143 1 0 1 1 0 8 0 nd6 48 12 0 8 1 0 1 1 0 8 0 ppxss 1128 18 0 18 4 3 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 28 0 10 1 0 1 1 0 8 0 pfstkey 112 28 0 10 1 0 1 1 0 8 0 pfstate 328 28 0 10 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 256 362 0 173 12 0 12 12 0 8 0 art_table 32 363 0 173 2 0 2 2 0 8 0 art_node 16 76 0 42 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 2 2 0 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 111 0 101 1 0 1 1 0 8 0 shmpl 112 53 0 3 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2586 0 1157 47 0 47 47 0 8 0 ffsino 272 2586 0 1157 96 0 96 96 0 8 0 nchpl 144 3748 0 2098 62 0 62 62 0 8 0 uvmvnodes 72 2752 0 0 51 0 51 51 0 8 0 vnodes 200 2752 0 0 145 0 145 145 0 8 0 namei 1024 11104 0 11104 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 11436 0 11436 10 9 1 7 0 8 1 sigapl 432 856 0 841 3 1 2 3 0 8 0 futexpl 56 7810 0 7810 1 0 1 1 0 8 1 knotepl 112 281 0 262 2 1 1 2 0 8 0 kqueuepl 104 190 0 188 1 0 1 1 0 8 0 pipepl 112 516 0 495 2 1 1 1 0 8 0 fdescpl 488 857 0 841 3 0 3 3 0 8 0 filepl 152 5381 0 5276 5 0 5 5 0 8 0 lockfpl 104 167 0 166 4 3 1 1 0 8 0 lockfspl 32 107 0 106 4 3 1 1 0 8 0 sessionpl 112 23 0 13 1 0 1 1 0 8 0 pgrppl 48 32 0 22 1 0 1 1 0 8 0 ucredpl 96 1146 0 1137 1 0 1 1 0 8 0 zombiepl 144 841 0 840 2 1 1 1 0 8 0 processpl 840 873 0 840 4 0 4 4 0 8 0 procpl 600 2282 0 2239 4 0 4 4 0 8 0 srpgc 64 22 0 22 2 1 1 1 0 8 1 sosppl 128 8 0 8 3 3 0 1 0 8 0 sockpl 384 755 0 732 4 1 3 4 0 8 0 mcl64k 65536 371 0 0 47 0 47 47 0 8 1 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 134 0 0 16 0 16 16 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 486 0 0 27 0 27 27 0 8 0 bufpl 256 7283 0 1148 384 0 384 384 0 8 0 anonpl 16 110881 0 103082 62 25 37 53 0 125 0 amapchunkpl 152 5131 0 5042 20 11 9 11 0 158 4 amappl16 192 4851 0 4385 59 34 25 36 0 8 0 amappl15 184 130 0 126 1 0 1 1 0 8 0 amappl14 176 272 0 265 2 1 1 1 0 8 0 amappl13 168 277 0 274 1 0 1 1 0 8 0 amappl12 160 244 0 241 1 0 1 1 0 8 0 amappl11 152 94 0 79 1 0 1 1 0 8 0 amappl10 144 69 0 66 1 0 1 1 0 8 0 amappl9 136 679 0 675 1 0 1 1 0 8 0 amappl8 128 231 0 216 1 0 1 1 0 8 0 amappl7 120 38 0 33 1 0 1 1 0 8 0 amappl6 112 68 0 60 1 0 1 1 0 8 0 amappl5 104 349 0 331 1 0 1 1 0 8 0 amappl4 96 1104 0 1081 2 1 1 2 0 8 0 amappl3 88 368 0 362 1 0 1 1 0 8 0 amappl2 80 6405 0 6350 2 0 2 2 0 8 0 amappl1 72 28460 0 28050 25 15 10 20 0 8 0 amappl 72 2568 0 2532 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 54 0 3 1 0 1 1 0 8 0 uaddrrnd 24 857 0 841 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 857 0 841 1 0 1 1 0 8 0 vmmpekpl 168 10836 0 10808 2 0 2 2 0 8 0 vmmpepl 168 101382 0 99962 104 25 79 79 0 357 8 vmsppl 360 856 0 841 2 0 2 2 0 8 0 pdppl 4096 1721 0 1682 6 0 6 6 0 8 0 pvpl 32 315118 0 304189 153 37 116 136 0 265 16 pmappl 224 856 0 841 2 1 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 602 0 4 18 0 18 18 0 8 0