login: panic: malloc: out of space in kmem_map Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *344738 32611 0 0x2 0 0K syz-executor1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x16c sys/kern/subr_prf.c:208 malloc(b9a15e570dc2b44c,ffff800001b476c0,200000) at malloc+0xa86 sys/kern/kern_malloc.c:242 kcovioctl(39d9424639d7d2db,80084b01,fffffd806a0cd6f8,fffffd807f7c7ba0,ffffffff81776346) at kcovioctl+0xd6 kd_init sys/dev/kcov.c:405 [inline] kcovioctl(39d9424639d7d2db,80084b01,fffffd806a0cd6f8,fffffd807f7c7ba0,ffffffff81776346) at kcovioctl+0xd6 sys/dev/kcov.c:298 VOP_IOCTL(c3763d77e3153655,80084b01,fffffd8068386578,ffff800020b92720,fffffd806a0cd6f8,ffff800020b92720) at VOP_IOCTL+0x80 sys/kern/vfs_vops.c:290 vn_ioctl(25ea85092ec7ebb4,fffffd8068386578,ffff800020b92720,8) at vn_ioctl+0xc5 sys/kern/vfs_vnops.c:512 sys_ioctl(41ec60d7efd1b091,2,ffff800020b92720) at sys_ioctl+0x652 syscall(39d9424639ad036f) at syscall+0x5a0 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(39d9424639ad036f) at syscall+0x5a0 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,36,7f7ffffdb620,36,3,9b57de41890) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdb5c0, count: 6 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}> show panic malloc: out of space in kmem_map ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x16c sys/kern/subr_prf.c:208 malloc(b9a15e570dc2b44c,ffff800001b476c0,200000) at malloc+0xa86 sys/kern/kern_malloc.c:242 kcovioctl(39d9424639d7d2db,80084b01,fffffd806a0cd6f8,fffffd807f7c7ba0,ffffffff81776346) at kcovioctl+0xd6 kd_init sys/dev/kcov.c:405 [inline] kcovioctl(39d9424639d7d2db,80084b01,fffffd806a0cd6f8,fffffd807f7c7ba0,ffffffff81776346) at kcovioctl+0xd6 sys/dev/kcov.c:298 VOP_IOCTL(c3763d77e3153655,80084b01,fffffd8068386578,ffff800020b92720,fffffd806a0cd6f8,ffff800020b92720) at VOP_IOCTL+0x80 sys/kern/vfs_vops.c:290 vn_ioctl(25ea85092ec7ebb4,fffffd8068386578,ffff800020b92720,8) at vn_ioctl+0xc5 sys/kern/vfs_vnops.c:512sys_ioctl(41ec60d7efd1b091,2,ffff800020b92720) at sys_ioctl+0x652 syscall(39d9424639ad036f) at syscall+0x5a0 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(39d9424639ad036f) at syscall+0x5a0 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,36,7f7ffffdb620,36,3,9b57de41890) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdb5c0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020c69a60 rbx 0xffff800020c69b00 rdx 0xffffffff81f35469 cy_pio_rec+0x2087 rcx 0 rax 0 r8 0xffffffff81d85b34 kprintf+0x174 r9 0x1 r10 0x49608cd879d0e377 r11 0x7cb3d9054cc7dcd0 r12 0x3000000008 r13 0xffff800020c69a70 r14 0x100 r15 0x1 rip 0xffffffff81bb44e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c69a50 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor1) pid=344738 stat=onproc flags process=2 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020b92978,0xffffffff822f3540 process=0xffff800020b94010 user=0xffff800020c64000, vmspace=0xfffffd807f00d2d0 estcpu=0, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *32611 344738 18630 0 7 0x2 syz-executor1 12668 324801 1 0 3 0x100083 ttyin getty 22848 335469 0 0 3 0x14200 bored sosplice 22978 333345 18630 0 3 0x82 piperd syz-executor0 18630 318746 66071 0 3 0x82 kqread syz-fuzzer 18630 112783 66071 0 3 0x4000082 thrsleep syz-fuzzer 18630 428131 66071 0 3 0x4000082 thrsleep syz-fuzzer 18630 39653 66071 0 3 0x4000082 thrsleep syz-fuzzer 18630 65167 66071 0 3 0x4000082 thrsleep syz-fuzzer 18630 367007 66071 0 3 0x4000082 thrsleep syz-fuzzer 18630 414938 66071 0 3 0x4000082 thrsleep syz-fuzzer 18630 2645 66071 0 3 0x4000082 thrsleep syz-fuzzer 18630 171579 66071 0 3 0x4000082 thrsleep syz-fuzzer 18630 337086 66071 0 3 0x4000082 thrsleep syz-fuzzer 18630 435911 66071 0 3 0x4000082 thrsleep syz-fuzzer 18630 260991 66071 0 3 0x4000082 thrsleep syz-fuzzer 66071 51831 38656 0 3 0x10008a pause ksh 38656 416433 17790 0 3 0x92 select sshd 17790 481027 1 0 3 0x80 select sshd 57266 342242 58695 73 3 0x100090 kqread syslogd 58695 170160 1 0 3 0x100082 netio syslogd 49370 106704 1 77 3 0x100090 poll dhclient 46713 462644 1 0 3 0x80 poll dhclient 54305 25464 0 0 3 0x14200 pgzero zerothread 10826 406896 0 0 3 0x14200 aiodoned aiodoned 50332 450201 0 0 3 0x14200 syncer update 96774 490682 0 0 3 0x14200 cleaner cleaner 73717 30159 0 0 3 0x14200 reaper reaper 59794 130339 0 0 3 0x14200 pgdaemon pagedaemon 57431 57757 0 0 3 0x14200 bored crynlk 29630 92828 0 0 3 0x14200 bored crypto 55556 272091 0 0 3 0x40014200 acpi0 acpi0 45139 386326 0 0 7 0x40014200 idle1 92367 54202 0 0 3 0x14200 bored softnet 58044 392449 0 0 3 0x14200 bored systqmp 76707 523569 0 0 3 0x14200 bored systq 60717 162823 0 0 3 0x40014200 bored softclock 37376 484019 0 0 3 0x40014200 idle0 1 471937 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 32611 (syz-executor1) thread 0xffff800020b92720 (344738) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff822d6828) locked @ /syzkaller/managers/multicore/kernel/sys/sys/syscall_mi.h:90 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9494 71887K 71895K 78643K 10844 0 0 pcb 23 9K 10K 78643K 419 0 0 rtable 82 3K 4K 78643K 246 0 0 ifaddr 43 11K 12K 78643K 92 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 21 0 0 iov 0 0K 16K 78643K 73 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1197 75K 76K 78643K 1805 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 14 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 106 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1792 194K 288K 78643K 12592 0 0 file desc 4 9K 25K 78643K 807 0 0 sigio 0 0K 0K 78643K 19 0 0 proc 42 38K 58K 78643K 379 0 0 subproc 53 55297K 67586K 78643K 91 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 91 0 0 in_multi 22 1K 2K 78643K 69 0 0 ether_multi 1 0K 0K 78643K 6 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 222 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 76 12K 29K 78643K 3340 0 0 UVM aobj 46 2K 2K 78643K 50 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 11 0 0 NDP 8 0K 0K 78643K 24 0 0 temp 134 2362K 2433K 78643K 4879 0 0 kqueue 0 0K 0K 78643K 6 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 1 1 0 1 1 0 8 0 inpcbpl 280 338 0 331 1 0 1 1 0 8 0 plimitpl 152 22 0 15 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 41 0 10 2 0 2 2 0 8 1 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 124 0 120 1 0 1 1 0 8 0 nd6 48 4 0 2 1 0 1 1 0 8 0 ppxss 1128 10 0 10 4 4 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 185 0 41 12 0 12 12 0 8 3 art_table 32 186 0 41 2 0 2 2 0 8 0 art_node 16 40 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 9 1 0 1 1 0 8 0 semapl 112 102 0 92 1 0 1 1 0 8 0 shmpl 112 48 0 4 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3066 0 1676 45 0 45 45 0 8 0 ffsino 272 3066 0 1676 93 0 93 93 0 8 0 nchpl 144 4444 0 2875 60 0 60 60 0 8 0 uvmvnodes 72 3190 0 0 58 0 58 58 0 8 0 vnodes 200 3190 0 0 168 0 168 168 0 8 0 namei 1024 12752 0 12752 2 1 1 1 0 8 1 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 11147 0 11147 7 6 1 6 0 8 1 sigapl 432 974 0 962 2 0 2 2 0 8 0 futexpl 56 9875 0 9875 1 0 1 1 0 8 1 knotepl 112 258 0 229 4 3 1 2 0 8 0 kqueuepl 104 248 0 246 1 0 1 1 0 8 0 pipepl 112 566 0 547 3 2 1 2 0 8 0 fdescpl 488 975 0 962 3 1 2 3 0 8 0 filepl 152 6259 0 6171 6 1 5 5 0 8 1 lockfpl 104 353 0 353 3 2 1 1 0 8 1 lockfspl 32 684 0 684 3 2 1 1 0 8 1 sessionpl 112 20 0 11 1 0 1 1 0 8 0 pgrppl 48 35 0 26 1 0 1 1 0 8 0 ucredpl 96 2038 0 2031 1 0 1 1 0 8 0 zombiepl 144 962 0 962 2 1 1 1 0 8 1 processpl 840 990 0 962 4 0 4 4 0 8 0 procpl 600 2718 0 2679 5 1 4 5 0 8 0 srpgc 64 6 0 6 1 0 1 1 0 8 1 sosppl 128 20 0 20 5 5 0 1 0 8 0 sockpl 384 714 0 697 3 0 3 3 0 8 1 mcl64k 65536 115 0 0 15 7 8 15 0 8 1 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 12 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 118 0 0 14 0 14 14 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 216 0 0 12 0 12 12 0 8 0 bufpl 256 6496 0 967 346 0 346 346 0 8 0 anonpl 16 96058 0 89829 62 14 48 48 0 125 16 amapchunkpl 152 5281 0 5186 9 4 5 9 0 158 0 amappl16 192 4543 0 4161 40 12 28 32 0 8 8 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 426 0 423 2 1 1 1 0 8 0 amappl13 168 18 0 15 1 0 1 1 0 8 0 amappl12 160 17 0 15 1 0 1 1 0 8 0 amappl11 152 552 0 543 1 0 1 1 0 8 0 amappl10 144 67 0 64 2 1 1 1 0 8 0 amappl9 136 715 0 713 1 0 1 1 0 8 0 amappl8 128 159 0 134 1 0 1 1 0 8 0 amappl7 120 34 0 28 1 0 1 1 0 8 0 amappl6 112 469 0 462 1 0 1 1 0 8 0 amappl5 104 116 0 105 1 0 1 1 0 8 0 amappl4 96 296 0 274 2 1 1 2 0 8 0 amappl3 88 158 0 152 1 0 1 1 0 8 0 amappl2 80 8056 0 8011 2 0 2 2 0 8 0 amappl1 72 29951 0 29559 23 13 10 18 0 8 0 amappl 72 2945 0 2912 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 49 0 4 1 0 1 1 0 8 0 uaddrrnd 24 975 0 962 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 975 0 962 1 0 1 1 0 8 0 vmmpekpl 168 11407 0 11386 2 0 2 2 0 8 0 vmmpepl 168 108540 0 107315 100 28 72 74 0 357 11 vmsppl 360 974 0 962 2 0 2 2 0 8 0 pdppl 4096 1957 0 1924 6 1 5 6 0 8 0 pvpl 32 289674 0 280538 154 30 124 124 0 265 36 pmappl 224 974 0 962 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 511 0 11 15 0 15 15 0 8 0