login: panic: malloc: allocation too large, type = 2, size = 8589942784 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 498612 5729 0 0 0 1 syz-executor.1 *322708 5729 0 0 0x4000000 0K 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 malloc(200002000,2,2) at malloc+0xa6f sys/kern/kern_malloc.c:339 wsmux_getmux(400003ff) at wsmux_getmux+0x71 sys/dev/wscons/wsmux.c:152 wsmux_add_mux(400003ff,ffff800000026d00) at wsmux_add_mux+0x2f sys/dev/wscons/wsmux.c:594 VOP_IOCTL(fffffd807acf90b8,80085761,ffff800020c09690,42,fffffd807f7c67e0,ffff800020b9a018) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd8067867d28,80085761,ffff800020c09690,ffff800020b9a018) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b9a018,ffff800020c097d8,ffff800020c097c0) at sys_ioctl+0x651 syscall(ffff800020c09870) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c09870) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,b1bf9bdb010) at Xsyscall+0x128 end of kernel end trace frame: 0xb1e14556b60, 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 malloc: allocation too large, type = 2, size = 8589942784 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 malloc(200002000,2,2) at malloc+0xa6f sys/kern/kern_malloc.c:339 wsmux_getmux(400003ff) at wsmux_getmux+0x71 sys/dev/wscons/wsmux.c:152 wsmux_add_mux(400003ff,ffff800000026d00) at wsmux_add_mux+0x2f sys/dev/wscons/wsmux.c:594 VOP_IOCTL(fffffd807acf90b8,80085761,ffff800020c09690,42,fffffd807f7c67e0,ffff800020b9a018) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd8067867d28,80085761,ffff800020c09690,ffff800020b9a018) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b9a018,ffff800020c097d8,ffff800020c097c0) at sys_ioctl+0x651 syscall(ffff800020c09870) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c09870) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff86,0,3,b1bf9bdb010) at Xsyscall+0x128 end of kernel end trace frame: 0xb1e14556b60, count: -10 ddb{0}> show registers rdi 0xffffffff810c0a17 db_enter+0x17 rsi 0x183e __ALIGN_SIZE+0x83e rbp 0xffff800020c09260 rbx 0xffff800020c09310 rdx 0x183f __ALIGN_SIZE+0x83f rcx 0xffff800002b66000 rax 0xffff800002b66000 r8 0xffffffff81793b13 kprintf+0x183 r9 0x1 r10 0x25 r11 0xbbe0b85fd4032bf2 r12 0x3000000008 r13 0xffff800020c09270 r14 0x100 r15 0x1 rip 0xffffffff810c0a18 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c09250 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=322708 stat=onproc flags process=0 proc=4000000 pri=67, usrpri=67, nice=20 forw=0xffffffffffffffff, list=0xffff800020b9a978,0xffffffff82361320 process=0xffff800020b8c6a8 user=0xffff800020c04000, vmspace=0xfffffd807f00b870 estcpu=34, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 5729 498612 25927 0 7 0 syz-executor.1 * 5729 322708 25927 0 7 0x4000000 syz-executor.1 49298 102407 1 0 3 0x100083 ttyin getty 25927 302454 41696 0 3 0x82 nanosleep syz-executor.1 46322 443254 41696 0 2 0x2 syz-executor.0 41696 435352 41385 0 3 0x82 thrsleep syz-fuzzer 41696 27650 41385 0 3 0x4000082 nanosleep syz-fuzzer 41696 467812 41385 0 3 0x4000082 thrsleep syz-fuzzer 41696 144759 41385 0 3 0x4000082 thrsleep syz-fuzzer 41696 436324 41385 0 3 0x4000082 thrsleep syz-fuzzer 41696 178747 41385 0 3 0x4000082 kqread syz-fuzzer 41696 15415 41385 0 3 0x4000082 thrsleep syz-fuzzer 41696 521575 41385 0 3 0x4000082 thrsleep syz-fuzzer 41696 306581 41385 0 3 0x4000082 thrsleep syz-fuzzer 41696 12583 41385 0 3 0x4000082 thrsleep syz-fuzzer 41385 204739 13567 0 3 0x10008a pause ksh 13567 344716 72520 0 3 0x92 select sshd 72520 294000 1 0 3 0x80 select sshd 63078 355347 98421 74 3 0x100092 bpf pflogd 98421 450857 1 0 3 0x80 netio pflogd 20721 119928 71105 73 3 0x100090 kqread syslogd 71105 196126 1 0 3 0x100082 netio syslogd 3916 462392 1 77 3 0x100090 poll dhclient 32376 68348 1 0 3 0x80 poll dhclient 37735 203548 0 0 3 0x14200 pgzero zerothread 55459 408796 0 0 3 0x14200 aiodoned aiodoned 71833 137666 0 0 3 0x14200 syncer update 11932 370925 0 0 3 0x14200 cleaner cleaner 32219 55707 0 0 3 0x14200 reaper reaper 26773 353738 0 0 3 0x14200 pgdaemon pagedaemon 27878 406672 0 0 3 0x14200 bored crynlk 39056 501899 0 0 3 0x14200 bored crypto 62242 269100 0 0 3 0x40014200 acpi0 acpi0 85228 87091 0 0 3 0x40014200 idle1 82190 276458 0 0 3 0x14200 bored softnet 25615 187205 0 0 3 0x14200 bored systqmp 51604 75489 0 0 3 0x14200 bored systq 79965 485876 0 0 3 0x40014200 bored softclock 79566 112289 0 0 3 0x40014200 idle0 86505 199032 0 0 3 0x14200 bored smr 1 332187 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 5729 (syz-executor.1) thread 0xffff800020b9a018 (322708) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8237aa40) 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 46322 (syz-executor.0) thread 0xffff800020b14260 (443254) exclusive rrwlock inode r = 0 (0xfffffd806ea0f918) 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 (0xfffffd80688e0700) 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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9500 6407K 6415K 78643K 10638 0 0 pcb 25 9K 10K 78643K 141 0 0 rtable 100 3K 4K 78643K 219 0 0 ifaddr 52 12K 12K 78643K 73 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1469 0 0 iov 0 0K 16K 78643K 26 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1201 75K 76K 78643K 1292 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 4 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 1K 1K 78643K 20 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 21K 78643K 187 0 0 sigio 0 0K 0K 78643K 8 0 0 proc 53 50K 71K 78643K 374 0 0 subproc 64 65538K 67586K 78643K 68 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 42 0 0 in_multi 33 2K 2K 78643K 54 0 0 ether_multi 1 0K 0K 78643K 4 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 216 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 82 20K 29K 78643K 1435 0 0 UVM aobj 8 2K 2K 78643K 8 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 19 0 0 NDP 10 0K 0K 78643K 19 0 0 temp 130 2368K 2432K 78643K 3682 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 280 135 0 128 1 0 1 1 0 8 0 plimitpl 152 26 0 18 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 41 0 1 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 44 0 40 1 0 1 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 4 0 4 1 0 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 14 0 2 1 0 1 1 0 8 0 pfstkey 112 14 0 2 1 0 1 1 0 8 0 pfstate 328 14 0 2 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 256 186 0 0 12 0 12 12 0 8 0 art_table 32 187 0 0 2 0 2 2 0 8 0 art_node 16 40 0 6 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1756 0 337 46 0 46 46 0 8 0 ffsino 272 1756 0 337 95 0 95 95 0 8 0 nchpl 144 2236 0 603 61 0 61 61 0 8 0 uvmvnodes 72 1815 0 0 33 0 33 33 0 8 0 vnodes 200 1815 0 0 96 0 96 96 0 8 0 namei 1024 5984 0 5984 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 6065 0 6065 7 6 1 6 0 8 1 sigapl 432 388 0 373 2 0 2 2 0 8 0 futexpl 56 2170 0 2170 1 0 1 1 0 8 1 knotepl 112 82 0 63 1 0 1 1 0 8 0 kqueuepl 104 46 0 44 1 0 1 1 0 8 0 pipepl 112 244 0 225 2 1 1 1 0 8 0 fdescpl 488 389 0 373 3 0 3 3 0 8 0 filepl 152 2073 0 1972 5 0 5 5 0 8 1 lockfpl 104 50 0 49 2 1 1 1 0 8 0 lockfspl 32 78 0 77 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 96 242 0 233 1 0 1 1 0 8 0 zombiepl 144 373 0 373 2 1 1 1 0 8 1 processpl 840 404 0 373 4 0 4 4 0 8 0 procpl 600 767 0 726 4 0 4 4 0 8 0 sockpl 384 243 0 224 3 0 3 3 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 121 0 0 15 0 15 15 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 150 0 0 8 0 8 8 0 8 0 bufpl 256 6168 0 1144 314 0 314 314 0 8 0 anonpl 16 44048 0 35336 43 6 37 41 0 125 0 amapchunkpl 152 1818 0 1734 9 4 5 9 0 158 0 amappl16 192 1184 0 727 24 0 24 24 0 8 0 amappl15 184 59 0 55 1 0 1 1 0 8 0 amappl14 176 115 0 111 2 1 1 1 0 8 0 amappl13 168 28 0 25 1 0 1 1 0 8 0 amappl12 160 104 0 100 1 0 1 1 0 8 0 amappl11 152 24 0 9 1 0 1 1 0 8 0 amappl10 144 150 0 146 1 0 1 1 0 8 0 amappl9 136 581 0 576 1 0 1 1 0 8 0 amappl8 128 131 0 116 1 0 1 1 0 8 0 amappl7 120 29 0 25 1 0 1 1 0 8 0 amappl6 112 55 0 47 1 0 1 1 0 8 0 amappl5 104 209 0 192 1 0 1 1 0 8 0 amappl4 96 543 0 515 2 1 1 2 0 8 0 amappl3 88 211 0 205 1 0 1 1 0 8 0 amappl2 80 2240 0 2186 2 0 2 2 0 8 0 amappl1 72 18250 0 17802 26 16 10 20 0 8 0 amappl 72 1004 0 970 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 389 0 373 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 389 0 373 1 0 1 1 0 8 0 vmmpekpl 168 7252 0 7230 2 0 2 2 0 8 0 vmmpepl 168 48270 0 46805 93 18 75 80 0 357 8 vmsppl 360 388 0 373 2 0 2 2 0 8 0 pdppl 4096 786 0 746 6 0 6 6 0 8 0 pvpl 32 159523 0 147588 116 8 108 113 0 265 9 pmappl 224 388 0 373 2 1 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 464 0 4 14 0 14 14 0 8 0