oLÒ=wal…̾ÒTw¯V É,yoLÒ=wal…̾ÒTw¯V É,ypanic: malloc: out of space in kmem_map Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *218393 34538 0 0x2 0 1K 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 malloc(200000,2a,9) at malloc+0xad5 sys/kern/kern_malloc.c:242 kcovioctl(1b1300,80084b01,ffff800020c8ee00,3,ffff800020b839e0) at kcovioctl+0xe6 kd_init sys/dev/kcov.c:405 [inline] kcovioctl(1b1300,80084b01,ffff800020c8ee00,3,ffff800020b839e0) at kcovioctl+0xe6 sys/dev/kcov.c:298 VOP_IOCTL(fffffd80632ea528,80084b01,ffff800020c8ee00,3,fffffd807f7c77e0,ffff800020b839e0) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80692e83b0,80084b01,ffff800020c8ee00,ffff800020b839e0) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b839e0,ffff800020c8ef40,ffff800020c8ef30) at sys_ioctl+0x646 syscall(ffff800020c8efe0) at syscall+0x5ac mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c8efe0) at syscall+0x5ac sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,36,7f7ffffc9738,36,3,9841f53a890) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc9250, 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{1}> ddb{1}> set $lines = 0 ddb{1}> show panic malloc: out of space in kmem_map 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 malloc(200000,2a,9) at malloc+0xad5 sys/kern/kern_malloc.c:242 kcovioctl(1b1300,80084b01,ffff800020c8ee00,3,ffff800020b839e0) at kcovioctl+0xe6 kd_init sys/dev/kcov.c:405 [inline] kcovioctl(1b1300,80084b01,ffff800020c8ee00,3,ffff800020b839e0) at kcovioctl+0xe6 sys/dev/kcov.c:298 VOP_IOCTL(fffffd80632ea528,80084b01,ffff800020c8ee00,3,fffffd807f7c77e0,ffff800020b839e0) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd80692e83b0,80084b01,ffff800020c8ee00,ffff800020b839e0) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b839e0,ffff800020c8ef40,ffff800020c8ef30) at sys_ioctl+0x646 syscall(ffff800020c8efe0) at syscall+0x5ac mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c8efe0) at syscall+0x5ac sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,36,7f7ffffc9738,36,3,9841f53a890) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc9250, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020c8ea30 rbx 0xffff800020c8eae0 rdx 0xffffffff81f5066f cy_pio_rec+0x1490 rcx 0 rax 0 r8 0xffffffff815047c3 kprintf+0x183 r9 0x1 r10 0x25 r11 0xaafd4ec7ee1e945c r12 0x3000000008 r13 0xffff800020c8ea40 r14 0x100 r15 0x1 rip 0xffffffff81891478 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c8ea20 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=218393 stat=onproc flags process=2 proc=0 pri=51, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020b83c38,0xffffffff8230a9a0 process=0xffff800020b849e8 user=0xffff800020c8a000, vmspace=0xfffffd807f00c708 estcpu=1, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *34538 218393 54931 0 7 0x2 syz-executor.1 8380 208029 1 0 3 0x100083 ttyin getty 211 98399 54931 0 3 0x82 piperd syz-executor.0 26849 249852 0 0 3 0x14200 bored sosplice 54931 452739 18126 0 3 0x82 thrsleep syz-fuzzer 54931 445161 18126 0 3 0x4000082 nanosleep syz-fuzzer 54931 34744 18126 0 3 0x4000082 thrsleep syz-fuzzer 54931 491579 18126 0 3 0x4000082 thrsleep syz-fuzzer 54931 424217 18126 0 3 0x4000082 thrsleep syz-fuzzer 54931 480279 18126 0 3 0x4000082 thrsleep syz-fuzzer 54931 474913 18126 0 3 0x4000082 thrsleep syz-fuzzer 54931 102107 18126 0 3 0x4000082 thrsleep syz-fuzzer 54931 358265 18126 0 3 0x4000082 thrsleep syz-fuzzer 54931 12638 18126 0 3 0x4000082 thrsleep syz-fuzzer 54931 213361 18126 0 3 0x4000082 kqread syz-fuzzer 54931 220955 18126 0 3 0x4000082 thrsleep syz-fuzzer 18126 343820 86954 0 3 0x10008a pause ksh 86954 294080 45746 0 3 0x92 select sshd 45746 363360 1 0 3 0x80 select sshd 54992 324603 95384 73 3 0x100090 kqread syslogd 95384 315918 1 0 3 0x100082 netio syslogd 79909 509380 1 77 3 0x100090 poll dhclient 72092 150380 1 0 3 0x80 poll dhclient 88430 166062 0 0 3 0x14200 pgzero zerothread 40387 69836 0 0 3 0x14200 aiodoned aiodoned 22016 357019 0 0 3 0x14200 syncer update 96079 164340 0 0 3 0x14200 cleaner cleaner 6516 480161 0 0 3 0x14200 reaper reaper 13076 378529 0 0 3 0x14200 pgdaemon pagedaemon 1458 385575 0 0 3 0x14200 bored crynlk 30659 416829 0 0 3 0x14200 bored crypto 98965 376147 0 0 3 0x40014200 acpi0 acpi0 91467 456212 0 0 3 0x40014200 idle1 65510 387960 0 0 3 0x14200 bored softnet 54863 491441 0 0 3 0x14200 bored systqmp 76763 7572 0 0 3 0x14200 bored systq 6894 68477 0 0 3 0x40014200 bored softclock 23126 34904 0 0 7 0x40014200 idle0 1 82974 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 34538 (syz-executor.1) thread 0xffff800020b839e0 (218393) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8233f420) locked @ /syzkaller/managers/multicore/kernel/sys/sys/syscall_mi.h:90 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9487 71885K 71893K 78643K 10906 0 0 pcb 23 9K 10K 78643K 501 0 0 rtable 82 3K 4K 78643K 648 0 0 ifaddr 40 11K 12K 78643K 184 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 30 0 0 iov 0 0K 32K 78643K 77 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1199 75K 75K 78643K 1956 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 9K 78643K 15 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 1K 78643K 158 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1792 194K 288K 78643K 12592 0 0 file desc 4 9K 21K 78643K 998 0 0 sigio 0 0K 0K 78643K 27 0 0 proc 42 38K 58K 78643K 592 0 0 subproc 53 55297K 67586K 78643K 471 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 95 0 0 in_multi 22 1K 2K 78643K 174 0 0 ether_multi 1 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 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 305 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 79 12K 29K 78643K 3905 0 0 UVM aobj 64 3K 3K 78643K 66 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 24 0 0 NDP 7 0K 0K 78643K 64 0 0 temp 128 2366K 2434K 78643K 6036 0 0 kqueue 0 0K 0K 78643K 3 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 15 0 12 1 0 1 1 0 8 0 inpcbpl 280 436 0 429 1 0 1 1 0 8 0 plimitpl 152 46 0 39 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 140 0 109 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 163 0 159 1 0 1 1 0 8 0 nd6 48 26 0 24 1 0 1 1 0 8 0 ppxss 1128 12 0 12 6 5 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 642 0 495 12 0 12 12 0 8 2 art_table 32 643 0 495 2 0 2 2 0 8 0 art_node 16 139 0 111 1 0 1 1 0 8 0 sysvmsgpl 40 32 0 15 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 156 0 146 1 0 1 1 0 8 0 shmpl 112 64 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3158 0 1746 46 0 46 46 0 8 0 ffsino 272 3158 0 1746 95 0 95 95 0 8 0 nchpl 144 4727 0 3122 61 0 61 61 0 8 0 uvmvnodes 72 3486 0 0 64 0 64 64 0 8 0 vnodes 200 3486 0 0 184 0 184 184 0 8 0 namei 1024 14098 0 14098 1 0 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 12592 0 12592 8 7 1 6 0 8 1 sigapl 432 1130 0 1118 2 0 2 2 0 8 0 futexpl 56 11139 0 11139 1 0 1 1 0 8 1 knotepl 112 494 0 465 3 1 2 2 0 8 1 kqueuepl 104 291 0 289 1 0 1 1 0 8 0 pipepl 112 752 0 733 1 0 1 1 0 8 0 fdescpl 488 1131 0 1118 3 1 2 3 0 8 0 filepl 152 6882 0 6794 7 2 5 5 0 8 1 lockfpl 104 321 0 321 4 3 1 1 0 8 1 lockfspl 32 476 0 476 4 3 1 1 0 8 1 sessionpl 112 29 0 20 1 0 1 1 0 8 0 pgrppl 48 39 0 30 1 0 1 1 0 8 0 ucredpl 96 1804 0 1797 1 0 1 1 0 8 0 zombiepl 144 1118 0 1118 1 0 1 1 0 8 1 processpl 840 1146 0 1118 4 0 4 4 0 8 0 procpl 600 3125 0 3086 5 1 4 5 0 8 0 srpgc 64 72 0 72 2 1 1 1 0 8 1 sosppl 128 14 0 14 5 5 0 1 0 8 0 sockpl 384 884 0 867 4 1 3 3 0 8 1 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 112 0 0 13 0 13 13 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 162 0 0 8 0 8 8 0 8 0 bufpl 256 6410 0 1024 337 0 337 337 0 8 0 anonpl 16 123498 0 117456 92 59 33 49 0 125 0 amapchunkpl 152 7141 0 7054 23 14 9 11 0 158 4 amappl16 192 4938 0 4534 82 61 21 33 0 8 0 amappl15 184 878 0 874 1 0 1 1 0 8 0 amappl14 176 874 0 872 2 1 1 1 0 8 0 amappl13 168 50 0 46 1 0 1 1 0 8 0 amappl12 160 27 0 23 1 0 1 1 0 8 0 amappl11 152 238 0 229 1 0 1 1 0 8 0 amappl10 144 59 0 58 1 0 1 1 0 8 0 amappl9 136 384 0 381 1 0 1 1 0 8 0 amappl8 128 203 0 177 1 0 1 1 0 8 0 amappl7 120 64 0 57 1 0 1 1 0 8 0 amappl6 112 500 0 492 1 0 1 1 0 8 0 amappl5 104 570 0 559 1 0 1 1 0 8 0 amappl4 96 299 0 277 1 0 1 1 0 8 0 amappl3 88 160 0 155 1 0 1 1 0 8 0 amappl2 80 9170 0 9131 2 0 2 2 0 8 0 amappl1 72 33963 0 33570 23 13 10 19 0 8 0 amappl 72 3406 0 3375 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 65 0 2 2 0 2 2 0 8 0 uaddrrnd 24 1131 0 1118 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1131 0 1118 1 0 1 1 0 8 0 vmmpekpl 168 12636 0 12614 2 0 2 2 0 8 0 vmmpepl 168 130163 0 128921 125 51 74 74 0 357 11 vmsppl 360 1130 0 1118 2 0 2 2 0 8 0 pdppl 4096 2269 0 2236 5 0 5 5 0 8 0 pvpl 32 366308 0 357377 193 75 118 134 0 265 29 pmappl 224 1130 0 1118 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 482 0 2 14 0 14 14 0 8 0