panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 5151 46029 0 0 0 1 syz-executor.1 *267572 46029 0 0 0x4000000 0K 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 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(fffffd8070818d00,80085761,ffff800020c30dd0,82,fffffd807f7c67e0,ffff800020b8a720) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80670b3c90,80085761,ffff800020c30dd0,ffff800020b8a720) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b8a720,ffff800020c30f18,ffff800020c30f00) at sys_ioctl+0x651 syscall(ffff800020c30fb0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c30fb0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,45e1732a010) at Xsyscall+0x128 end of kernel end trace frame: 0x46022eb2e80, 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 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(fffffd8070818d00,80085761,ffff800020c30dd0,82,fffffd807f7c67e0,ffff800020b8a720) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80670b3c90,80085761,ffff800020c30dd0,ffff800020b8a720) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b8a720,ffff800020c30f18,ffff800020c30f00) at sys_ioctl+0x651 syscall(ffff800020c30fb0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c30fb0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,45e1732a010) at Xsyscall+0x128 end of kernel end trace frame: 0x46022eb2e80, count: -10 ddb{0}> show registers rdi 0xffffffff81a9fb17 db_enter+0x17 rsi 0x13e8 __ALIGN_SIZE+0x3e8 rbp 0xffff800020c30a10 rbx 0xffff800020c30ac0 rdx 0x13e9 __ALIGN_SIZE+0x3e9 rcx 0xffff800002b66000 rax 0xffff800002b66000 r8 0xffffffff814d1103 kprintf+0x183 r9 0x1 r10 0x25 r11 0xac4905d69ff5e7ae r12 0x3000000008 r13 0xffff800020c30a20 r14 0x100 r15 0x1 rip 0xffffffff81a9fb18 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c30a00 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=267572 stat=onproc flags process=0 proc=4000000 pri=77, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff800020b8a018,0xffffffff823ac728 process=0xffff800020b7d3c8 user=0xffff800020c2c000, vmspace=0xfffffd807effd5a0 estcpu=27, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 46029 5151 31026 0 7 0 syz-executor.1 *46029 267572 31026 0 7 0x4000000 syz-executor.1 21589 492605 0 0 3 0x14200 bored sosplice 31026 64764 86547 0 3 0x82 nanosleep syz-executor.1 70051 448035 86547 0 2 0x2 syz-executor.0 86547 379459 25478 0 3 0x82 thrsleep syz-fuzzer 86547 363853 25478 0 3 0x4000082 nanosleep syz-fuzzer 86547 396823 25478 0 3 0x4000082 thrsleep syz-fuzzer 86547 449648 25478 0 3 0x4000082 kqread syz-fuzzer 86547 489186 25478 0 3 0x4000082 thrsleep syz-fuzzer 86547 15058 25478 0 3 0x4000082 thrsleep syz-fuzzer 86547 515510 25478 0 3 0x4000082 nanosleep syz-fuzzer 86547 249991 25478 0 3 0x4000082 thrsleep syz-fuzzer 86547 241572 25478 0 3 0x4000082 thrsleep syz-fuzzer 86547 224345 25478 0 3 0x4000082 thrsleep syz-fuzzer 25478 125074 58663 0 3 0x10008a pause ksh 58663 218959 59005 0 3 0x92 select sshd 6853 108433 1 0 3 0x100083 ttyin getty 59005 143163 1 0 3 0x80 select sshd 22762 106578 60611 74 3 0x100092 bpf pflogd 60611 9172 1 0 3 0x80 netio pflogd 15766 203873 4340 73 3 0x100090 kqread syslogd 4340 360697 1 0 3 0x100082 netio syslogd 53959 182712 1 77 3 0x100090 poll dhclient 77055 152394 1 0 3 0x80 poll dhclient 61611 401077 0 0 3 0x14200 pgzero zerothread 48863 98480 0 0 3 0x14200 aiodoned aiodoned 92702 61566 0 0 3 0x14200 syncer update 54642 153919 0 0 3 0x14200 cleaner cleaner 45692 523937 0 0 3 0x14200 reaper reaper 83462 202214 0 0 3 0x14200 pgdaemon pagedaemon 71938 92078 0 0 3 0x14200 bored crynlk 15952 195657 0 0 3 0x14200 bored crypto 49620 297916 0 0 3 0x40014200 acpi0 acpi0 89104 506596 0 0 3 0x40014200 idle1 88 479449 0 0 3 0x14200 bored softnet 41056 100618 0 0 3 0x14200 bored systqmp 73104 41216 0 0 3 0x14200 bored systq 75006 472591 0 0 3 0x40014200 bored softclock 39181 89034 0 0 3 0x40014200 idle0 10069 122244 0 0 3 0x14200 bored smr 1 315648 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 46029 (syz-executor.1) thread 0xffff800020b8a720 (267572) 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 70051 (syz-executor.0) thread 0xffff800020b05c28 (448035) exclusive rrwlock inode r = 0 (0xfffffd8068b34c50) 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 (0xfffffd8068b34810) 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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9505 8456K 8464K 78643K 10776 0 0 pcb 25 9K 10K 78643K 351 0 0 rtable 100 3K 4K 78643K 305 0 0 ifaddr 53 12K 13K 78643K 121 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1472 0 0 iov 0 0K 28K 78643K 52 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1192 75K 75K 78643K 1532 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 11 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 63 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 25K 78643K 565 0 0 sigio 0 0K 0K 78643K 12 0 0 proc 54 51K 71K 78643K 401 0 0 subproc 64 65538K 67586K 78643K 70 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 93 0 0 in_multi 33 2K 2K 78643K 67 0 0 ether_multi 1 0K 0K 78643K 6 0 0 mrt 0 0K 0K 78643K 3 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 241 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 89 21K 22K 78643K 2729 0 0 UVM aobj 31 2K 2K 78643K 35 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 19 0 0 NDP 10 0K 0K 78643K 31 0 0 temp 157 2375K 2493K 78643K 4584 0 0 kqueue 0 0K 0K 78643K 3 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 4 0 0 1 0 1 1 0 8 0 inpcbpl 280 375 0 368 1 0 1 1 0 8 0 plimitpl 152 27 0 19 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 tcpcb 544 146 0 142 1 0 1 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 14 0 14 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 26 0 7 1 0 1 1 0 8 0 pfstkey 112 26 0 7 1 0 1 1 0 8 0 pfstate 328 26 0 7 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 256 184 0 0 12 0 12 12 0 8 0 art_table 32 185 0 0 2 0 2 2 0 8 0 art_node 16 40 0 6 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 12 1 0 1 1 0 8 0 semapl 112 61 0 51 1 0 1 1 0 8 0 shmpl 112 33 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2506 0 1091 46 0 46 46 0 8 0 ffsino 272 2506 0 1091 95 0 95 95 0 8 0 nchpl 144 3513 0 1885 61 0 61 61 0 8 0 uvmvnodes 72 2586 0 0 48 0 48 48 0 8 0 vnodes 200 2586 0 0 137 0 137 137 0 8 0 namei 1024 10007 0 10006 1 0 1 1 0 8 0 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 12126 0 12126 7 6 1 6 0 8 1 sigapl 432 761 0 746 3 1 2 3 0 8 0 futexpl 56 6734 0 6734 1 0 1 1 0 8 1 knotepl 112 172 0 145 3 2 1 2 0 8 0 kqueuepl 104 183 0 181 1 0 1 1 0 8 0 pipepl 112 500 0 479 2 1 1 2 0 8 0 fdescpl 488 762 0 746 3 0 3 3 0 8 0 filepl 152 4673 0 4571 5 0 5 5 0 8 1 lockfpl 104 154 0 153 3 2 1 1 0 8 0 lockfspl 32 175 0 174 3 2 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 1179 0 1170 1 0 1 1 0 8 0 zombiepl 144 746 0 746 1 0 1 1 0 8 1 processpl 840 778 0 746 4 0 4 4 0 8 0 procpl 600 2050 0 2008 4 0 4 4 0 8 0 sosppl 128 11 0 11 3 2 1 1 0 8 1 sockpl 384 664 0 645 4 1 3 3 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 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 130 0 0 16 0 16 16 0 8 1 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 142 0 0 9 0 9 9 0 8 0 bufpl 256 6514 0 1047 342 0 342 342 0 8 0 anonpl 16 82523 0 73685 61 17 44 53 0 125 7 amapchunkpl 152 4021 0 3934 10 6 4 9 0 158 0 amappl16 192 3406 0 2937 49 25 24 36 0 8 0 amappl15 184 2 0 0 1 0 1 1 0 8 0 amappl14 176 285 0 279 1 0 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 559 0 555 1 0 1 1 0 8 0 amappl11 152 215 0 201 1 0 1 1 0 8 0 amappl10 144 70 0 64 1 0 1 1 0 8 0 amappl9 136 362 0 359 1 0 1 1 0 8 0 amappl8 128 424 0 404 1 0 1 1 0 8 0 amappl7 120 27 0 24 1 0 1 1 0 8 0 amappl6 112 321 0 311 1 0 1 1 0 8 0 amappl5 104 124 0 110 1 0 1 1 0 8 0 amappl4 96 309 0 285 2 1 1 2 0 8 0 amappl3 88 145 0 139 1 0 1 1 0 8 0 amappl2 80 5950 0 5897 2 0 2 2 0 8 0 amappl1 72 26676 0 26237 24 14 10 19 0 8 0 amappl 72 2290 0 2255 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 34 0 4 1 0 1 1 0 8 0 uaddrrnd 24 762 0 746 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 762 0 746 1 0 1 1 0 8 0 vmmpekpl 168 10853 0 10830 2 0 2 2 0 8 0 vmmpepl 168 89844 0 88380 97 26 71 80 0 357 5 vmsppl 360 761 0 746 2 0 2 2 0 8 0 pdppl 4096 1532 0 1492 6 0 6 6 0 8 0 pvpl 32 272720 0 260706 149 24 125 140 0 265 23 pmappl 224 761 0 746 2 1 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 493 0 3 14 0 14 14 0 8 0