L Å]¼§ƒL Å]¼§ƒpanic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *158965 45345 0 0 0x4000000 1K syz-executor.1 270654 37773 0 0x2 0x4000000 0 syz-fuzzer db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x174 sys/kern/subr_prf.c:208 ufs_lookup() at ufs_lookup 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(fffffd807961fd30,80085761,ffff800020c2d370,3,fffffd807f7c6840,ffff800020b64978) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80677a4e58,80085761,ffff800020c2d370,ffff800020b64978) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b64978,ffff800020c2d4b8,ffff800020c2d4a0) at sys_ioctl+0x651 syscall(ffff800020c2d550) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c2d550) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,99633447010) at Xsyscall+0x128 end of kernel end trace frame: 0x9990f5ed9e0, 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 ufs_lookup() at ufs_lookup 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(fffffd807961fd30,80085761,ffff800020c2d370,3,fffffd807f7c6840,ffff800020b64978) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80677a4e58,80085761,ffff800020c2d370,ffff800020b64978) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b64978,ffff800020c2d4b8,ffff800020c2d4a0) at sys_ioctl+0x651 syscall(ffff800020c2d550) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c2d550) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,99633447010) at Xsyscall+0x128 end of kernel end trace frame: 0x9990f5ed9e0, count: -10 ddb{1}> show registers rdi 0xffffffff81805f47 db_enter+0x17 rsi 0x16fe __ALIGN_SIZE+0x6fe rbp 0xffff800020c2cfb0 rbx 0xffff800020c2d060 rdx 0x16ff __ALIGN_SIZE+0x6ff rcx 0xffff800001766000 rax 0xffff800001766000 r8 0xffffffff81d07983 kprintf+0x183 r9 0x1 r10 0x25 r11 0x78f7d9caeca21815 r12 0x3000000008 r13 0xffff800020c2cfc0 r14 0x100 r15 0x1 rip 0xffffffff81805f48 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c2cfa0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=158965 stat=onproc flags process=0 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020b64018,0xffffffff823e7ac0 process=0xffff800020b7d080 user=0xffff800020c28000, vmspace=0xfffffd807effe5a0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 45345 389171 22083 0 2 0 syz-executor.1 *45345 158965 22083 0 7 0x4000000 syz-executor.1 22083 343451 37773 0 3 0x82 nanosleep syz-executor.1 37118 93657 37773 0 3 0x2 biowait syz-executor.0 40341 167594 0 0 3 0x14200 bored sosplice 37773 425312 67368 0 3 0x82 thrsleep syz-fuzzer 37773 212572 67368 0 3 0x4000082 nanosleep syz-fuzzer 37773 421102 67368 0 3 0x4000082 thrsleep syz-fuzzer 37773 59444 67368 0 3 0x4000082 thrsleep syz-fuzzer 37773 413589 67368 0 3 0x4000082 nanosleep syz-fuzzer 37773 291420 67368 0 3 0x4000082 thrsleep syz-fuzzer 37773 314425 67368 0 3 0x4000082 thrsleep syz-fuzzer 37773 71283 67368 0 3 0x4000082 thrsleep syz-fuzzer 37773 270654 67368 0 7 0x4000002 syz-fuzzer 37773 359917 67368 0 3 0x4000082 thrsleep syz-fuzzer 67368 341617 51743 0 3 0x10008a pause ksh 51743 457192 70251 0 3 0x92 select sshd 53335 315341 1 0 3 0x100083 ttyin getty 70251 206381 1 0 3 0x80 select sshd 84456 298224 77316 74 3 0x100092 bpf pflogd 77316 277302 1 0 3 0x80 netio pflogd 88677 373319 92261 73 3 0x100090 kqread syslogd 92261 479367 1 0 3 0x100082 netio syslogd 44813 516223 1 77 3 0x100090 poll dhclient 52517 244492 1 0 3 0x80 poll dhclient 81704 355611 0 0 3 0x14200 pgzero zerothread 94830 315079 0 0 3 0x14200 aiodoned aiodoned 75534 437408 0 0 3 0x14200 syncer update 31436 449063 0 0 3 0x14200 cleaner cleaner 10264 369643 0 0 3 0x14200 reaper reaper 56259 462544 0 0 3 0x14200 pgdaemon pagedaemon 54025 471950 0 0 3 0x14200 bored crynlk 87278 303093 0 0 3 0x14200 bored crypto 80602 147754 0 0 3 0x40014200 acpi0 acpi0 4485 148939 0 0 3 0x40014200 idle1 13019 41252 0 0 3 0x14200 bored softnet 49765 329943 0 0 3 0x14200 bored systqmp 36434 347399 0 0 3 0x14200 bored systq 1404 112068 0 0 3 0x40014200 bored softclock 22814 477670 0 0 3 0x40014200 idle0 9506 320552 0 0 3 0x14200 bored smr 1 80843 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 45345 (syz-executor.1) thread 0xffff800020b64978 (158965) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff823eced0) 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 37118 (syz-executor.0) thread 0xffff800020b64720 (93657) exclusive rrwlock inode r = 0 (0xfffffd8071a37c48) 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 vget+0x1c3 sys/kern/vfs_subr.c:672 #6 ufs_ihashget+0x151 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x84 sys/ufs/ffs/ffs_vfsops.c:1323 #8 ufs_lookup+0x15d3 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x67 sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x556 sys/kern/vfs_lookup.c:523 #11 namei+0x4b2 sys/kern/vfs_lookup.c:224 #12 dounlinkat+0xa5 sys/kern/vfs_syscalls.c:1673 #13 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] #13 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8071a374d8) 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 vget+0x1c3 sys/kern/vfs_subr.c:672 #6 cache_lookup+0x300 sys/kern/vfs_cache.c:224 #7 ufs_lookup+0x1d7 sys/ufs/ufs/ufs_lookup.c:162 #8 VOP_LOOKUP+0x67 sys/kern/vfs_vops.c:90 #9 vfs_lookup+0x556 sys/kern/vfs_lookup.c:523 #10 namei+0x4b2 sys/kern/vfs_lookup.c:224 #11 dounlinkat+0xa5 sys/kern/vfs_syscalls.c:1673 #12 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] #12 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9498 6413K 6419K 78643K 10745 0 0 pcb 25 9K 11K 78643K 232 0 0 rtable 100 3K 4K 78643K 433 0 0 ifaddr 49 12K 12K 78643K 133 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1475 0 0 iov 0 0K 16K 78643K 44 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1196 75K 75K 78643K 1480 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 5 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 51 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 21K 78643K 388 0 0 sigio 0 0K 0K 78643K 3 0 0 proc 53 50K 71K 78643K 455 0 0 subproc 64 65538K 67586K 78643K 238 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 56 0 0 in_multi 33 2K 2K 78643K 106 0 0 ether_multi 1 0K 0K 78643K 7 0 0 mrt 0 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 78 344K 344K 78643K 78 0 0 exec 0 0K 1K 78643K 237 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 81 20K 29K 78643K 2114 0 0 UVM aobj 13 2K 2K 78643K 13 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 16 0 0 NDP 9 0K 0K 78643K 41 0 0 temp 132 2370K 2437K 78643K 4506 0 0 kqueue 0 0K 0K 78643K 2 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 9 0 5 1 0 1 1 0 8 0 inpcbpl 280 218 0 211 1 0 1 1 0 8 0 plimitpl 152 36 0 28 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 86 0 46 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 83 0 79 1 0 1 1 0 8 0 nd6 48 14 0 10 1 0 1 1 0 8 0 ppxss 1128 12 0 12 2 1 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 21 0 13 1 0 1 1 0 8 0 pfstkey 112 21 0 13 1 0 1 1 0 8 0 pfstate 328 21 0 13 2 1 1 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 256 392 0 204 12 0 12 12 0 8 0 art_table 32 393 0 204 2 0 2 2 0 8 0 art_node 16 85 0 51 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 49 0 39 1 0 1 1 0 8 0 shmpl 112 11 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2082 0 649 47 0 47 47 0 8 0 ffsino 272 2082 0 649 97 1 96 96 0 8 0 nchpl 144 2830 0 1193 61 0 61 61 0 8 0 uvmvnodes 72 2243 0 0 41 0 41 41 0 8 0 vnodes 200 2243 0 0 119 0 119 119 0 8 0 namei 1024 8208 0 8208 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 7847 0 7846 13 10 3 6 0 8 2 sigapl 432 572 0 557 2 0 2 2 0 8 0 futexpl 56 4018 0 4018 2 1 1 1 0 8 1 knotepl 112 233 0 214 1 0 1 1 0 8 0 kqueuepl 104 93 0 91 1 0 1 1 0 8 0 pipepl 112 440 0 421 3 2 1 2 0 8 0 fdescpl 488 573 0 557 3 0 3 3 0 8 0 filepl 152 3453 0 3352 8 3 5 7 0 8 1 lockfpl 104 132 0 132 3 2 1 1 0 8 1 lockfspl 32 272 0 272 3 2 1 1 0 8 1 sessionpl 112 23 0 12 1 0 1 1 0 8 0 pgrppl 48 29 0 18 1 0 1 1 0 8 0 ucredpl 96 669 0 660 1 0 1 1 0 8 0 zombiepl 144 557 0 557 2 1 1 1 0 8 1 processpl 840 589 0 557 4 0 4 4 0 8 0 procpl 600 1358 0 1316 4 0 4 4 0 8 0 srpgc 64 30 0 30 2 1 1 1 0 8 1 sosppl 128 6 0 6 3 2 1 1 0 8 1 sockpl 384 413 0 394 5 2 3 4 0 8 1 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 127 0 0 15 0 15 15 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 185 0 0 8 0 8 8 0 8 0 bufpl 256 6682 0 1146 346 0 346 346 0 8 0 anonpl 16 68701 0 61377 63 11 52 53 0 125 14 amapchunkpl 152 3334 0 3249 14 5 9 9 0 158 5 amappl16 192 2178 0 1717 36 5 31 36 0 8 7 amappl15 184 59 0 55 1 0 1 1 0 8 0 amappl14 176 240 0 237 2 1 1 1 0 8 0 amappl13 168 68 0 64 1 0 1 1 0 8 0 amappl12 160 282 0 279 1 0 1 1 0 8 0 amappl11 152 24 0 9 1 0 1 1 0 8 0 amappl10 144 74 0 71 1 0 1 1 0 8 0 amappl9 136 651 0 646 1 0 1 1 0 8 0 amappl8 128 205 0 188 1 0 1 1 0 8 0 amappl7 120 41 0 34 1 0 1 1 0 8 0 amappl6 112 63 0 55 1 0 1 1 0 8 0 amappl5 104 205 0 191 1 0 1 1 0 8 0 amappl4 96 628 0 596 2 0 2 2 0 8 0 amappl3 88 510 0 502 1 0 1 1 0 8 0 amappl2 80 3716 0 3662 2 0 2 2 0 8 0 amappl1 72 22226 0 21786 25 15 10 20 0 8 0 amappl 72 1628 0 1594 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 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 573 0 557 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 573 0 557 1 0 1 1 0 8 0 vmmpekpl 168 8781 0 8757 2 0 2 2 0 8 0 vmmpepl 168 69065 0 67603 114 29 85 85 0 357 17 vmsppl 360 572 0 557 2 0 2 2 0 8 0 pdppl 4096 1154 0 1114 6 0 6 6 0 8 0 pvpl 32 222174 0 211603 154 21 133 134 0 265 34 pmappl 224 572 0 557 4 2 2 2 0 8 1 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 499 0 5 15 0 15 15 0 8 0