panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 253924 99474 0 0 0 1 syz-executor.0 *217829 99474 0 0 0x4000000 0K 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 db_show_all_nfsreqs(ffffffff80000000,8,2,2) at db_show_all_nfsreqs 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(fffffd807b138db8,80085761,ffff800020c471b0,82,fffffd807f7c6900,ffff800020b64720) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80672133b0,80085761,ffff800020c471b0,ffff800020b64720) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b64720,ffff800020c472f8,ffff800020c472e0) at sys_ioctl+0x651 syscall(ffff800020c47390) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c47390) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,1bd8be73010) at Xsyscall+0x128 end of kernel end trace frame: 0x1c0100e7eb0, 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:399 panic() at panic+0x174 sys/kern/subr_prf.c:208 db_show_all_nfsreqs(ffffffff80000000,8,2,2) at db_show_all_nfsreqs 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(fffffd807b138db8,80085761,ffff800020c471b0,82,fffffd807f7c6900,ffff800020b64720) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80672133b0,80085761,ffff800020c471b0,ffff800020b64720) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b64720,ffff800020c472f8,ffff800020c472e0) at sys_ioctl+0x651 syscall(ffff800020c47390) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c47390) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,1bd8be73010) at Xsyscall+0x128 end of kernel end trace frame: 0x1c0100e7eb0, count: -10 ddb{0}> show registers rdi 0xffffffff811cb8e7 db_enter+0x17 rsi 0x144b __ALIGN_SIZE+0x44b rbp 0xffff800020c46df0 rbx 0xffff800020c46ea0 rdx 0x144c __ALIGN_SIZE+0x44c rcx 0xffff800000967000 rax 0xffff800000967000 r8 0xffffffff816f0ee3 kprintf+0x183 r9 0x1 r10 0x25 r11 0x8d1da2d25f60f94a r12 0x3000000008 r13 0xffff800020c46e00 r14 0x100 r15 0x1 rip 0xffffffff811cb8e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c46de0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=217829 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b652d8,0xffffffff82387c10 process=0xffff800020b7c9f0 user=0xffff800020c42000, vmspace=0xfffffd807effdb40 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 99474 253924 69646 0 7 0 syz-executor.0 *99474 217829 69646 0 7 0x4000000 syz-executor.0 72175 234193 61636 0 3 0x82 nanosleep syz-executor.1 69646 151511 61636 0 3 0x82 nanosleep syz-executor.0 64064 39012 0 0 3 0x14200 bored sosplice 61636 369593 34532 0 3 0x82 thrsleep syz-fuzzer 61636 370488 34532 0 3 0x4000082 thrsleep syz-fuzzer 61636 270469 34532 0 3 0x4000082 thrsleep syz-fuzzer 61636 193630 34532 0 3 0x4000082 thrsleep syz-fuzzer 61636 74765 34532 0 3 0x4000082 thrsleep syz-fuzzer 61636 144826 34532 0 3 0x4000082 thrsleep syz-fuzzer 61636 12549 34532 0 3 0x4000082 thrsleep syz-fuzzer 61636 148232 34532 0 3 0x4000082 thrsleep syz-fuzzer 61636 495796 34532 0 3 0x4000082 thrsleep syz-fuzzer 61636 297409 34532 0 3 0x4000082 kqread syz-fuzzer 34532 377444 68167 0 3 0x10008a pause ksh 68167 103280 40729 0 3 0x92 select sshd 80235 9533 1 0 3 0x100083 ttyin getty 40729 336769 1 0 3 0x80 select sshd 85351 5418 97704 74 3 0x100092 bpf pflogd 97704 14395 1 0 3 0x80 netio pflogd 9617 501813 56086 73 3 0x100010 ffs_fsync syslogd 56086 256139 1 0 3 0x100082 netio syslogd 43199 225489 1 77 3 0x100090 poll dhclient 89337 32358 1 0 3 0x80 poll dhclient 73393 429830 0 0 2 0x14200 zerothread 955 135980 0 0 3 0x14200 aiodoned aiodoned 15034 507998 0 0 3 0x14200 syncer update 66849 423664 0 0 3 0x14200 cleaner cleaner 64005 461066 0 0 3 0x14200 reaper reaper 88134 217433 0 0 3 0x14200 pgdaemon pagedaemon 66634 138236 0 0 3 0x14200 bored crynlk 97651 56328 0 0 3 0x14200 bored crypto 56976 157731 0 0 3 0x40014200 acpi0 acpi0 58283 315366 0 0 3 0x40014200 idle1 72154 510191 0 0 3 0x14200 bored softnet 3347 322962 0 0 3 0x14200 bored systqmp 87004 60878 0 0 3 0x14200 bored systq 71551 444411 0 0 3 0x40014200 bored softclock 31242 110560 0 0 3 0x40014200 idle0 75430 119450 0 0 3 0x14200 bored smr 1 437384 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 99474 (syz-executor.0) thread 0xffff800020b64720 (217829) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff823ef400) 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 9617 (syslogd) thread 0xffff800020b672d0 (501813) exclusive rrwlock inode r = 0 (0xfffffd806eb45e68) 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 sys_fsync+0x114 sys/kern/vfs_syscalls.c:2704 #6 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] #6 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9517 6413K 6415K 78643K 10740 0 0 pcb 25 9K 11K 78643K 286 0 0 rtable 100 3K 4K 78643K 320 0 0 ifaddr 58 13K 13K 78643K 113 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1477 0 0 iov 0 0K 16K 78643K 229 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1202 75K 76K 78643K 1455 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 9 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 71 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 21K 78643K 559 0 0 sigio 0 0K 0K 78643K 4 0 0 proc 57 63K 71K 78643K 411 0 0 subproc 64 65538K 67586K 78643K 138 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 48 0 0 in_multi 33 2K 2K 78643K 67 0 0 ether_multi 1 0K 0K 78643K 2 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 231 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 87 21K 30K 78643K 2619 0 0 UVM aobj 41 4K 4K 78643K 43 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 6 0 0 NDP 12 0K 0K 78643K 32 0 0 temp 154 2371K 2436K 78643K 4710 0 0 kqueue 0 0K 0K 78643K 2 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 6 0 2 1 0 1 1 0 8 0 inpcbpl 280 257 0 250 1 0 1 1 0 8 0 plimitpl 152 39 0 31 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 59 0 19 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 79 0 75 1 0 1 1 0 8 0 nd6 48 8 0 4 1 0 1 1 0 8 0 ppxss 1128 9 0 9 4 3 1 1 0 8 1 pffrent 40 1 0 1 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 18 0 11 1 0 1 1 0 8 0 pfstkey 112 18 0 11 1 0 1 1 0 8 0 pfstate 328 18 0 11 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 256 273 0 89 12 0 12 12 0 8 0 art_table 32 274 0 89 2 0 2 2 0 8 0 art_node 16 58 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 5 1 0 1 1 0 8 0 semapl 112 69 0 59 1 0 1 1 0 8 0 shmpl 112 41 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2425 0 996 47 0 47 47 0 8 0 ffsino 272 2425 0 996 96 0 96 96 0 8 0 nchpl 144 3492 0 1850 61 0 61 61 0 8 0 uvmvnodes 72 2547 0 0 47 0 47 47 0 8 0 vnodes 200 2547 0 0 135 0 135 135 0 8 0 namei 1024 9425 0 9425 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 9030 0 9029 10 7 3 6 0 8 2 sigapl 432 752 0 737 2 0 2 2 0 8 0 futexpl 56 5240 0 5240 1 0 1 1 0 8 1 knotepl 112 186 0 167 1 0 1 1 0 8 0 kqueuepl 104 132 0 130 1 0 1 1 0 8 0 pipepl 112 456 0 437 4 3 1 2 0 8 0 fdescpl 488 753 0 737 3 0 3 3 0 8 0 filepl 152 4088 0 3988 9 4 5 7 0 8 1 lockfpl 104 539 0 538 2 1 1 1 0 8 0 lockfspl 32 342 0 341 2 1 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 26 0 15 1 0 1 1 0 8 0 ucredpl 96 787 0 778 1 0 1 1 0 8 0 zombiepl 144 737 0 736 3 2 1 1 0 8 0 processpl 840 769 0 736 4 0 4 4 0 8 0 procpl 600 1908 0 1865 4 0 4 4 0 8 0 srpgc 64 10 0 10 1 1 0 1 0 8 0 sosppl 128 9 0 9 3 2 1 1 0 8 1 sockpl 384 483 0 464 5 2 3 4 0 8 1 mcl64k 65536 7 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 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 149 0 0 18 0 18 18 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 161 0 0 10 0 10 10 0 8 0 bufpl 256 6764 0 1145 352 0 352 352 0 8 0 anonpl 16 80591 0 71943 68 16 52 52 0 125 16 amapchunkpl 152 4178 0 4089 16 7 9 11 0 158 5 amappl16 192 3306 0 2852 47 16 31 35 0 8 8 amappl15 184 118 0 114 1 0 1 1 0 8 0 amappl14 176 250 0 246 2 1 1 1 0 8 0 amappl13 168 273 0 268 1 0 1 1 0 8 0 amappl12 160 5 0 5 1 1 0 1 0 8 0 amappl11 152 87 0 71 1 0 1 1 0 8 0 amappl10 144 70 0 65 1 0 1 1 0 8 0 amappl9 136 603 0 598 1 0 1 1 0 8 0 amappl8 128 153 0 134 1 0 1 1 0 8 0 amappl7 120 34 0 29 1 0 1 1 0 8 0 amappl6 112 58 0 49 1 0 1 1 0 8 0 amappl5 104 120 0 106 1 0 1 1 0 8 0 amappl4 96 1203 0 1176 2 1 1 2 0 8 0 amappl3 88 347 0 342 1 0 1 1 0 8 0 amappl2 80 5489 0 5437 3 1 2 2 0 8 0 amappl1 72 25365 0 24933 25 15 10 20 0 8 0 amappl 72 2167 0 2131 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 42 0 2 1 0 1 1 0 8 0 uaddrrnd 24 753 0 737 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 753 0 737 1 0 1 1 0 8 0 vmmpekpl 168 10040 0 10019 2 0 2 2 0 8 0 vmmpepl 168 85535 0 84088 110 32 78 79 0 357 11 vmsppl 360 752 0 737 2 0 2 2 0 8 0 pdppl 4096 1514 0 1474 6 0 6 6 0 8 0 pvpl 32 248354 0 236431 160 26 134 134 0 265 36 pmappl 224 752 0 737 3 2 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 508 0 4 15 0 15 15 0 8 0