login: panic: malloc: out of space in kmem_map Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *426095 43843 0 0x2 0 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 malloc(200000,2a,9) at malloc+0xad5 sys/kern/kern_malloc.c:242 kcovioctl(1b1300,80084b01,ffff800020c213b0,3,ffff800020b05520) at kcovioctl+0xe6 kd_init sys/dev/kcov.c:405 [inline] kcovioctl(1b1300,80084b01,ffff800020c213b0,3,ffff800020b05520) at kcovioctl+0xe6 sys/dev/kcov.c:298 VOP_IOCTL(fffffd8062991810,80084b01,ffff800020c213b0,3,fffffd807f7c68a0,ffff800020b05520) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806716b1e0,80084b01,ffff800020c213b0,ffff800020b05520) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b05520,ffff800020c214f0,ffff800020c214e0) at sys_ioctl+0x651 syscall(ffff800020c21590) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c21590) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,36,7f7ffffd2418,36,3,7be84e81890) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd1f30, 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}> set $maxwidth = 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+0x174 sys/kern/subr_prf.c:208 malloc(200000,2a,9) at malloc+0xad5 sys/kern/kern_malloc.c:242 kcovioctl(1b1300,80084b01,ffff800020c213b0,3,ffff800020b05520) at kcovioctl+0xe6 kd_init sys/dev/kcov.c:405 [inline] kcovioctl(1b1300,80084b01,ffff800020c213b0,3,ffff800020b05520) at kcovioctl+0xe6 sys/dev/kcov.c:298 VOP_IOCTL(fffffd8062991810,80084b01,ffff800020c213b0,3,fffffd807f7c68a0,ffff800020b05520) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd806716b1e0,80084b01,ffff800020c213b0,ffff800020b05520) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff800020b05520,ffff800020c214f0,ffff800020c214e0) at sys_ioctl+0x651 syscall(ffff800020c21590) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c21590) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,36,7f7ffffd2418,36,3,7be84e81890) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd1f30, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020c20fe0 rbx 0xffff800020c21090 rdx 0xffffffff81f8be0b cy_pio_rec+0xbc9 rcx 0 rax 0 r8 0xffffffff81cff133 kprintf+0x183 r9 0x1 r10 0x25 r11 0x8799148963e9a815 r12 0x3000000008 r13 0xffff800020c20ff0 r14 0x100 r15 0x1 rip 0xffffffff81896608 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c20fd0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=426095 stat=onproc flags process=2 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020b04260,0xffffffff823613a0 process=0xffff800020b7c9f0 user=0xffff800020c1c000, vmspace=0xfffffd807f00b5a0 estcpu=0, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *43843 426095 30514 0 7 0x2 syz-executor.1 98756 90514 30514 0 3 0x82 piperd syz-executor.0 30514 306025 77797 0 3 0x82 thrsleep syz-fuzzer 30514 73772 77797 0 3 0x4000082 thrsleep syz-fuzzer 30514 366031 77797 0 3 0x4000082 thrsleep syz-fuzzer 30514 41009 77797 0 3 0x4000082 thrsleep syz-fuzzer 30514 405521 77797 0 3 0x4000082 thrsleep syz-fuzzer 30514 60578 77797 0 3 0x4000082 kqread syz-fuzzer 30514 101675 77797 0 3 0x4000082 thrsleep syz-fuzzer 30514 286526 77797 0 3 0x4000082 thrsleep syz-fuzzer 30514 492063 77797 0 3 0x4000082 thrsleep syz-fuzzer 30514 464197 77797 0 3 0x4000082 thrsleep syz-fuzzer 77797 363610 40694 0 3 0x10008a pause ksh 40694 455264 44617 0 3 0x92 select sshd 22735 211010 1 0 3 0x100083 ttyin getty 44617 239772 1 0 3 0x80 select sshd 99589 233236 86950 74 3 0x100092 bpf pflogd 86950 218722 1 0 3 0x80 netio pflogd 17541 279453 77821 73 3 0x100090 kqread syslogd 77821 12465 1 0 3 0x100082 netio syslogd 95003 256595 1 77 3 0x100090 poll dhclient 2137 36431 1 0 3 0x80 poll dhclient 87145 123589 0 0 3 0x14200 pgzero zerothread 38752 182986 0 0 3 0x14200 aiodoned aiodoned 77105 299806 0 0 3 0x14200 syncer update 24526 357332 0 0 3 0x14200 cleaner cleaner 53542 493540 0 0 3 0x14200 reaper reaper 78965 93547 0 0 3 0x14200 pgdaemon pagedaemon 688 238348 0 0 3 0x14200 bored crynlk 95013 34643 0 0 3 0x14200 bored crypto 51136 449694 0 0 3 0x40014200 acpi0 acpi0 62233 362397 0 0 7 0x40014200 idle1 65571 357635 0 0 3 0x14200 bored softnet 94471 149424 0 0 3 0x14200 bored systqmp 56165 368306 0 0 3 0x14200 bored systq 20418 287770 0 0 3 0x40014200 bored softclock 81677 208396 0 0 3 0x40014200 idle0 77811 247268 0 0 3 0x14200 bored smr 1 436645 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 43843 (syz-executor.1) thread 0xffff800020b05520 (426095) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82373b28) 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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9464 71927K 71935K 78643K 10565 0 0 pcb 25 9K 10K 78643K 60 0 0 rtable 79 2K 3K 78643K 191 0 0 ifaddr 36 9K 10K 78643K 47 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1469 0 0 iov 0 0K 12K 78643K 3 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1199 75K 75K 78643K 1221 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 5 0K 0K 78643K 5 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 4 9K 21K 78643K 42 0 0 proc 52 50K 71K 78643K 319 0 0 subproc 53 55297K 67586K 78643K 89 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 22 1K 2K 78643K 33 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 18 79K 79K 78643K 18 0 0 exec 0 0K 1K 78643K 190 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 80 12K 21K 78643K 933 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 6 0K 0K 78643K 12 0 0 temp 85 2364K 2429K 78643K 3157 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 36 0 29 1 0 1 1 0 8 0 plimitpl 152 16 0 8 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 tcpqe 32 18 0 18 1 0 1 1 0 8 1 tcpcb 544 10 0 6 1 0 1 1 0 8 0 nd6 48 4 0 2 1 0 1 1 0 8 0 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 12 0 1 1 0 1 1 0 8 0 pfstkey 112 12 0 1 1 0 1 1 0 8 0 pfstate 328 12 0 1 1 0 1 1 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 256 185 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 semapl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1471 0 52 46 0 46 46 0 8 0 ffsino 272 1471 0 52 95 0 95 95 0 8 0 nchpl 144 1740 0 111 61 0 61 61 0 8 0 uvmvnodes 72 1526 0 0 28 0 28 28 0 8 0 vnodes 200 1526 0 0 81 0 81 81 0 8 0 namei 1024 4583 0 4583 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 4258 0 4258 7 1 6 6 0 8 6 sigapl 432 235 0 221 2 0 2 2 0 8 0 futexpl 56 177 0 177 1 0 1 1 0 8 1 knotepl 112 87 0 58 2 0 2 2 0 8 1 kqueuepl 104 4 0 2 1 0 1 1 0 8 0 pipepl 112 154 0 135 2 1 1 1 0 8 0 fdescpl 488 236 0 221 3 0 3 3 0 8 0 filepl 152 1143 0 1050 5 0 5 5 0 8 1 lockfpl 104 10 0 10 2 1 1 1 0 8 1 lockfspl 32 5 0 5 2 1 1 1 0 8 1 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 18 0 8 1 0 1 1 0 8 0 ucredpl 96 47 0 38 1 0 1 1 0 8 0 zombiepl 144 221 0 221 2 1 1 1 0 8 1 processpl 840 251 0 221 4 0 4 4 0 8 0 procpl 600 292 0 253 4 0 4 4 0 8 1 srpgc 64 6 0 6 1 0 1 1 0 8 1 sockpl 384 82 0 63 3 0 3 3 0 8 1 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 133 0 0 16 0 16 16 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 146 0 0 9 0 9 9 0 8 0 bufpl 256 5465 0 1043 277 0 277 277 0 8 0 anonpl 16 29592 0 22723 36 2 34 34 0 125 0 amapchunkpl 152 818 0 715 6 0 6 6 0 158 0 amappl16 192 583 0 183 21 0 21 21 0 8 0 amappl15 184 21 0 19 1 0 1 1 0 8 0 amappl14 176 29 0 25 1 0 1 1 0 8 0 amappl13 168 25 0 22 1 0 1 1 0 8 0 amappl12 160 15 0 13 1 0 1 1 0 8 0 amappl11 152 220 0 207 1 0 1 1 0 8 0 amappl10 144 64 0 61 1 0 1 1 0 8 0 amappl9 136 377 0 373 1 0 1 1 0 8 0 amappl8 128 137 0 121 1 0 1 1 0 8 0 amappl7 120 29 0 24 1 0 1 1 0 8 0 amappl6 112 60 0 52 1 0 1 1 0 8 0 amappl5 104 121 0 108 1 0 1 1 0 8 0 amappl4 96 313 0 290 2 1 1 2 0 8 0 amappl3 88 125 0 117 1 0 1 1 0 8 0 amappl2 80 861 0 815 2 0 2 2 0 8 0 amappl1 72 14224 0 13801 24 9 15 19 0 8 5 amappl 72 528 0 492 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 236 0 221 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 236 0 221 1 0 1 1 0 8 0 vmmpekpl 168 5879 0 5858 2 0 2 2 0 8 0 vmmpepl 168 32408 0 31115 86 9 77 77 0 357 16 vmsppl 360 235 0 221 2 0 2 2 0 8 0 pdppl 4096 480 0 442 6 0 6 6 0 8 0 pvpl 32 116291 0 106372 101 5 96 99 0 265 4 pmappl 224 235 0 221 2 0 2 2 0 8 1 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 426 0 3 13 0 13 13 0 8 0