panic: malloc: allocation too large, type = 98, size = ADDR
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syzbot
Oct 4, 2020, 6:38:15 AM10/4/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 06d46252 phb(4)
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14c54da3900000
kernel config: https://syzkaller.appspot.com/x/.config?x=fe55924c11e64b0a
dashboard link: https://syzkaller.appspot.com/bug?extid=d80de26a8db6c009d060
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d80de2...@syzkaller.appspotmail.com
panic: malloc: allocation too large, type = 98, size = 760898376
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 69240 42177 0 0 0x4000000 0 syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a330,ffff80001fb93538,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001fb936b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5ad5debe0f0, 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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
malloc: allocation too large, type = 98, size = 760898376
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a330,ffff80001fb93538,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001fb936b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5ad5debe0f0, count: -9
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80001fb93150
rbx 0xffff80001fb93160
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff811f91f0 kprintf+0x140
r9 0x1
r10 0xad2952514b720be8
r11 0xaffeaf2aaa2ed4cb
r12 0x3000000008
r13 0xffff80001fb93200
r14 0x100
r15 0x1
rip 0xffffffff81506bd8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80001fb93140
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.0) pid=69240 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=82, usrpri=82, nice=20
forw=0xffffffffffffffff, list=0xffff80001d8be028,0xffffffff827db0d8
process=0xffff80001d8c03c0 user=0xffff80001fb8e000, vmspace=0xfffffd806bc0a330
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
42177 58762 67174 0 2 0 syz-executor.0
*42177 69240 67174 0 7 0x4000000 syz-executor.0
45839 390768 7757 0 2 0x2 syz-executor.1
67174 294760 7757 0 3 0x82 nanosleep syz-executor.0
7757 406252 89794 0 3 0x82 thrsleep syz-fuzzer
7757 236331 89794 0 3 0x4000082 thrsleep syz-fuzzer
7757 36800 89794 0 3 0x4000082 thrsleep syz-fuzzer
7757 487392 89794 0 3 0x4000082 kqread syz-fuzzer
7757 445303 89794 0 3 0x4000082 thrsleep syz-fuzzer
7757 430477 89794 0 3 0x4000082 thrsleep syz-fuzzer
7757 308078 89794 0 3 0x4000082 thrsleep syz-fuzzer
89794 356081 30606 0 3 0x10008a pause ksh
30606 67766 54963 0 3 0x92 select sshd
87118 366037 1 0 3 0x100083 ttyin getty
54963 117753 1 0 3 0x80 select sshd
47435 403941 33523 73 3 0x100090 kqread syslogd
33523 205438 1 0 3 0x100082 netio syslogd
49505 339097 1 77 3 0x100090 poll dhclient
81731 374861 1 0 3 0x80 poll dhclient
17101 213966 0 0 3 0x14200 bored smr
98208 279324 0 0 3 0x14200 pgzero zerothread
82282 300034 0 0 3 0x14200 aiodoned aiodoned
87548 425494 0 0 3 0x14200 syncer update
97215 8690 0 0 3 0x14200 cleaner cleaner
82138 216873 0 0 3 0x14200 reaper reaper
18326 251162 0 0 3 0x14200 pgdaemon pagedaemon
88666 146737 0 0 3 0x14200 bored crynlk
28499 274187 0 0 3 0x14200 bored crypto
53348 105511 0 0 3 0x40014200 acpi0 acpi0
5939 299541 0 0 3 0x14200 bored softnet
9793 172563 0 0 3 0x14200 bored systqmp
88794 137161 0 0 3 0x14200 bored systq
83294 197183 0 0 3 0x40014200 bored softclock
45871 69483 0 0 3 0x40014200 idle0
1 242834 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9451 6347K 6533K 78643K 24699 0
pcb 13 8K 8K 78643K 1411 0
rtable 105 3K 3K 78643K 229 0
ifaddr 39 10K 10K 78643K 46 0
sysctl 2 0K 0K 78643K 2 0
counters 21 16K 16K 78643K 22 0
ioctlops 0 0K 2K 78643K 1264 0
iov 0 0K 16K 78643K 433 0
mount 1 1K 1K 78643K 1 0
vnodes 1224 77K 77K 78643K 8190 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 609 0
VM map 2 0K 0K 78643K 2 0
sem 10 0K 1K 78643K 730 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 195K 288K 78643K 12938 0
file desc 5 13K 25K 78643K 45214 0
proc 48 38K 63K 78643K 405 0
subproc 32 2K 2K 78643K 51 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 33 2K 2K 78643K 44 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 43 201K 201K 78643K 43 0
exec 0 0K 2K 78643K 341 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 142 24K 8216K 78643K 92381 0
UVM aobj 131 4K 4K 78643K 133 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 5 0K 0K 78643K 12 0
temp 100 3957K 4021K 78643K 99475 0
kqueue 3 4K 4K 78643K 3 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 2 1 0 1 1 0 8 0
rtpcb 96 46 0 44 1 0 1 1 0 8 0
rtentry 112 56 0 12 2 0 2 2 0 8 0
unpcb 120 11162 0 11154 1 0 1 1 0 8 0
syncache 272 4 0 4 1 1 0 1 0 8 0
tcpcb 592 335 0 331 10 9 1 3 0 8 0
inpcb 296 7003 0 6996 2 1 1 2 0 8 0
nd6 48 9 0 3 1 0 1 1 0 8 0
kcovpl 48 3 0 1 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 233 0 44 12 0 12 12 0 8 0
art_table 32 234 0 44 2 0 2 2 0 8 0
art_node 16 55 0 15 1 0 1 1 0 8 0
semapl 112 728 0 720 1 0 1 1 0 8 0
shmpl 112 130 0 2 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 47560 0 46158 88 0 88 88 0 8 0
ffsino 240 47560 0 46158 83 0 83 83 0 8 0
nchpl 144 97951 0 96368 60 0 60 60 0 8 0
uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0
vnodes 208 5926 0 0 312 0 312 312 0 8 0
namei 1024 243725 0 243725 4 3 1 1 0 8 1
scxspl 192 279757 0 279757 2 1 1 1 0 8 1
plimitpl 152 15 0 8 1 0 1 1 0 8 0
sigapl 424 45397 0 45369 4 0 4 4 0 8 0
futexpl 56 247343 0 247343 4 3 1 1 0 8 1
knotepl 112 74 0 54 1 0 1 1 0 8 0
kqueuepl 152 2 0 0 1 0 1 1 0 8 0
pipepl 272 2647 0 2636 29 28 1 2 0 8 0
fdescpl 432 45383 0 45369 2 0 2 2 0 8 0
filepl 120 119904 0 119807 4 0 4 4 0 8 0
lockfpl 104 3053 0 3052 1 0 1 1 0 8 0
lockfspl 48 1329 0 1328 1 0 1 1 0 8 0
sessionpl 120 18 0 8 1 0 1 1 0 8 0
pgrppl 48 265 0 255 1 0 1 1 0 8 0
ucredpl 96 6981 0 6974 1 0 1 1 0 8 0
zombiepl 144 45369 0 45369 1 0 1 1 0 8 1
processpl 944 45397 0 45369 4 0 4 4 0 8 0
procpl 632 91384 0 91349 6 2 4 4 0 8 0
sockpl 400 18226 0 18209 54 52 2 3 0 8 0
mcl64k 65536 36 0 36 20 20 0 1 0 8 0
mcl16k 16384 42 0 42 9 9 0 1 0 8 0
mcl12k 12288 301 0 301 44 43 1 1 0 8 1
mcl9k 9216 485 0 485 44 43 1 1 0 8 1
mcl8k 8192 2311 0 2311 26 26 0 1 0 8 0
mcl4k 4096 1090 0 1090 54 53 1 1 0 8 1
mcl2k2 2112 83 0 83 22 21 1 1 0 8 1
mcl2k 2048 64854 0 64813 14 8 6 10 0 8 0
mtagpl 96 2 0 2 1 1 0 1 0 8 0
mbufpl 256 319266 0 319157 43 34 9 14 0 8 1
bufpl 280 49086 0 43696 386 0 386 386 0 8 0
anonpl 16 2701133 0 2697186 30 10 20 20 0 107 0
amapchunkpl 152 1388719 0 1388595 40344 9 40335 40335 0 158 40328
amappl16 192 141425 0 141260 21 12 9 9 0 8 0
amappl15 184 5 0 3 1 0 1 1 0 8 0
amappl14 176 5 0 4 1 0 1 1 0 8 0
amappl13 168 37925 0 37922 1 0 1 1 0 8 0
amappl12 160 18 0 14 1 0 1 1 0 8 0
amappl11 152 59 0 49 1 0 1 1 0 8 0
amappl10 144 4 0 2 1 0 1 1 0 8 0
amappl9 136 360 0 359 1 0 1 1 0 8 0
amappl8 128 575 0 473 5 1 4 4 0 8 0
amappl7 120 249 0 242 1 0 1 1 0 8 0
amappl6 112 114 0 101 1 0 1 1 0 8 0
amappl5 104 45497 0 45488 1 0 1 1 0 8 0
amappl4 96 804 0 773 1 0 1 1 0 8 0
amappl3 88 38896 0 38890 1 0 1 1 0 8 0
amappl2 80 320049 0 319986 2 0 2 2 0 8 0
amappl1 72 1132697 0 1132260 24 14 10 18 0 8 0
amappl 80 91644 0 91600 1 0 1 1 0 84 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
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 132 0 2 3 0 3 3 0 8 0
uaddrrnd 24 45383 0 45369 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 45383 0 45369 1 0 1 1 0 8 0
vmmpekpl 168 212661 0 212639 2 0 2 2 0 8 0
vmmpepl 168 5340852 0 5339521 141 77 64 71 0 357 6
vmsppl 272 45382 0 45369 2 1 1 2 0 8 0
pdppl 4096 90772 0 90738 6 1 5 6 0 8 0
pvpl 32 7758373 0 7751518 276 214 62 112 0 265 0
pmappl 200 45382 0 45369 1 0 1 1 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 451 0 238 7 0 7 7 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a330,ffff80001fb93538,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001fb936b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5ad5debe0f0, count: -9
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a330,ffff80001fb93538,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001fb936b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5ad5debe0f0, count: -9
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: 06d46252 phb(4)
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14c54da3900000
kernel config: https://syzkaller.appspot.com/x/.config?x=fe55924c11e64b0a
dashboard link: https://syzkaller.appspot.com/bug?extid=d80de26a8db6c009d060
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d80de2...@syzkaller.appspotmail.com
panic: malloc: allocation too large, type = 98, size = 760898376
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 69240 42177 0 0 0x4000000 0 syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a330,ffff80001fb93538,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001fb936b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5ad5debe0f0, 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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
malloc: allocation too large, type = 98, size = 760898376
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a330,ffff80001fb93538,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001fb936b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5ad5debe0f0, count: -9
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80001fb93150
rbx 0xffff80001fb93160
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff811f91f0 kprintf+0x140
r9 0x1
r10 0xad2952514b720be8
r11 0xaffeaf2aaa2ed4cb
r12 0x3000000008
r13 0xffff80001fb93200
r14 0x100
r15 0x1
rip 0xffffffff81506bd8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80001fb93140
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.0) pid=69240 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=82, usrpri=82, nice=20
forw=0xffffffffffffffff, list=0xffff80001d8be028,0xffffffff827db0d8
process=0xffff80001d8c03c0 user=0xffff80001fb8e000, vmspace=0xfffffd806bc0a330
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
42177 58762 67174 0 2 0 syz-executor.0
*42177 69240 67174 0 7 0x4000000 syz-executor.0
45839 390768 7757 0 2 0x2 syz-executor.1
67174 294760 7757 0 3 0x82 nanosleep syz-executor.0
7757 406252 89794 0 3 0x82 thrsleep syz-fuzzer
7757 236331 89794 0 3 0x4000082 thrsleep syz-fuzzer
7757 36800 89794 0 3 0x4000082 thrsleep syz-fuzzer
7757 487392 89794 0 3 0x4000082 kqread syz-fuzzer
7757 445303 89794 0 3 0x4000082 thrsleep syz-fuzzer
7757 430477 89794 0 3 0x4000082 thrsleep syz-fuzzer
7757 308078 89794 0 3 0x4000082 thrsleep syz-fuzzer
89794 356081 30606 0 3 0x10008a pause ksh
30606 67766 54963 0 3 0x92 select sshd
87118 366037 1 0 3 0x100083 ttyin getty
54963 117753 1 0 3 0x80 select sshd
47435 403941 33523 73 3 0x100090 kqread syslogd
33523 205438 1 0 3 0x100082 netio syslogd
49505 339097 1 77 3 0x100090 poll dhclient
81731 374861 1 0 3 0x80 poll dhclient
17101 213966 0 0 3 0x14200 bored smr
98208 279324 0 0 3 0x14200 pgzero zerothread
82282 300034 0 0 3 0x14200 aiodoned aiodoned
87548 425494 0 0 3 0x14200 syncer update
97215 8690 0 0 3 0x14200 cleaner cleaner
82138 216873 0 0 3 0x14200 reaper reaper
18326 251162 0 0 3 0x14200 pgdaemon pagedaemon
88666 146737 0 0 3 0x14200 bored crynlk
28499 274187 0 0 3 0x14200 bored crypto
53348 105511 0 0 3 0x40014200 acpi0 acpi0
5939 299541 0 0 3 0x14200 bored softnet
9793 172563 0 0 3 0x14200 bored systqmp
88794 137161 0 0 3 0x14200 bored systq
83294 197183 0 0 3 0x40014200 bored softclock
45871 69483 0 0 3 0x40014200 idle0
1 242834 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9451 6347K 6533K 78643K 24699 0
pcb 13 8K 8K 78643K 1411 0
rtable 105 3K 3K 78643K 229 0
ifaddr 39 10K 10K 78643K 46 0
sysctl 2 0K 0K 78643K 2 0
counters 21 16K 16K 78643K 22 0
ioctlops 0 0K 2K 78643K 1264 0
iov 0 0K 16K 78643K 433 0
mount 1 1K 1K 78643K 1 0
vnodes 1224 77K 77K 78643K 8190 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 609 0
VM map 2 0K 0K 78643K 2 0
sem 10 0K 1K 78643K 730 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 195K 288K 78643K 12938 0
file desc 5 13K 25K 78643K 45214 0
proc 48 38K 63K 78643K 405 0
subproc 32 2K 2K 78643K 51 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 33 2K 2K 78643K 44 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 43 201K 201K 78643K 43 0
exec 0 0K 2K 78643K 341 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 142 24K 8216K 78643K 92381 0
UVM aobj 131 4K 4K 78643K 133 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 5 0K 0K 78643K 12 0
temp 100 3957K 4021K 78643K 99475 0
kqueue 3 4K 4K 78643K 3 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 2 1 0 1 1 0 8 0
rtpcb 96 46 0 44 1 0 1 1 0 8 0
rtentry 112 56 0 12 2 0 2 2 0 8 0
unpcb 120 11162 0 11154 1 0 1 1 0 8 0
syncache 272 4 0 4 1 1 0 1 0 8 0
tcpcb 592 335 0 331 10 9 1 3 0 8 0
inpcb 296 7003 0 6996 2 1 1 2 0 8 0
nd6 48 9 0 3 1 0 1 1 0 8 0
kcovpl 48 3 0 1 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 233 0 44 12 0 12 12 0 8 0
art_table 32 234 0 44 2 0 2 2 0 8 0
art_node 16 55 0 15 1 0 1 1 0 8 0
semapl 112 728 0 720 1 0 1 1 0 8 0
shmpl 112 130 0 2 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 47560 0 46158 88 0 88 88 0 8 0
ffsino 240 47560 0 46158 83 0 83 83 0 8 0
nchpl 144 97951 0 96368 60 0 60 60 0 8 0
uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0
vnodes 208 5926 0 0 312 0 312 312 0 8 0
namei 1024 243725 0 243725 4 3 1 1 0 8 1
scxspl 192 279757 0 279757 2 1 1 1 0 8 1
plimitpl 152 15 0 8 1 0 1 1 0 8 0
sigapl 424 45397 0 45369 4 0 4 4 0 8 0
futexpl 56 247343 0 247343 4 3 1 1 0 8 1
knotepl 112 74 0 54 1 0 1 1 0 8 0
kqueuepl 152 2 0 0 1 0 1 1 0 8 0
pipepl 272 2647 0 2636 29 28 1 2 0 8 0
fdescpl 432 45383 0 45369 2 0 2 2 0 8 0
filepl 120 119904 0 119807 4 0 4 4 0 8 0
lockfpl 104 3053 0 3052 1 0 1 1 0 8 0
lockfspl 48 1329 0 1328 1 0 1 1 0 8 0
sessionpl 120 18 0 8 1 0 1 1 0 8 0
pgrppl 48 265 0 255 1 0 1 1 0 8 0
ucredpl 96 6981 0 6974 1 0 1 1 0 8 0
zombiepl 144 45369 0 45369 1 0 1 1 0 8 1
processpl 944 45397 0 45369 4 0 4 4 0 8 0
procpl 632 91384 0 91349 6 2 4 4 0 8 0
sockpl 400 18226 0 18209 54 52 2 3 0 8 0
mcl64k 65536 36 0 36 20 20 0 1 0 8 0
mcl16k 16384 42 0 42 9 9 0 1 0 8 0
mcl12k 12288 301 0 301 44 43 1 1 0 8 1
mcl9k 9216 485 0 485 44 43 1 1 0 8 1
mcl8k 8192 2311 0 2311 26 26 0 1 0 8 0
mcl4k 4096 1090 0 1090 54 53 1 1 0 8 1
mcl2k2 2112 83 0 83 22 21 1 1 0 8 1
mcl2k 2048 64854 0 64813 14 8 6 10 0 8 0
mtagpl 96 2 0 2 1 1 0 1 0 8 0
mbufpl 256 319266 0 319157 43 34 9 14 0 8 1
bufpl 280 49086 0 43696 386 0 386 386 0 8 0
anonpl 16 2701133 0 2697186 30 10 20 20 0 107 0
amapchunkpl 152 1388719 0 1388595 40344 9 40335 40335 0 158 40328
amappl16 192 141425 0 141260 21 12 9 9 0 8 0
amappl15 184 5 0 3 1 0 1 1 0 8 0
amappl14 176 5 0 4 1 0 1 1 0 8 0
amappl13 168 37925 0 37922 1 0 1 1 0 8 0
amappl12 160 18 0 14 1 0 1 1 0 8 0
amappl11 152 59 0 49 1 0 1 1 0 8 0
amappl10 144 4 0 2 1 0 1 1 0 8 0
amappl9 136 360 0 359 1 0 1 1 0 8 0
amappl8 128 575 0 473 5 1 4 4 0 8 0
amappl7 120 249 0 242 1 0 1 1 0 8 0
amappl6 112 114 0 101 1 0 1 1 0 8 0
amappl5 104 45497 0 45488 1 0 1 1 0 8 0
amappl4 96 804 0 773 1 0 1 1 0 8 0
amappl3 88 38896 0 38890 1 0 1 1 0 8 0
amappl2 80 320049 0 319986 2 0 2 2 0 8 0
amappl1 72 1132697 0 1132260 24 14 10 18 0 8 0
amappl 80 91644 0 91600 1 0 1 1 0 84 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
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 132 0 2 3 0 3 3 0 8 0
uaddrrnd 24 45383 0 45369 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 45383 0 45369 1 0 1 1 0 8 0
vmmpekpl 168 212661 0 212639 2 0 2 2 0 8 0
vmmpepl 168 5340852 0 5339521 141 77 64 71 0 357 6
vmsppl 272 45382 0 45369 2 1 1 2 0 8 0
pdppl 4096 90772 0 90738 6 1 5 6 0 8 0
pvpl 32 7758373 0 7751518 276 214 62 112 0 265 0
pmappl 200 45382 0 45369 1 0 1 1 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 451 0 238 7 0 7 7 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a330,ffff80001fb93538,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001fb936b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5ad5debe0f0, count: -9
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a330,ffff80001fb93538,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8be2a0,ffff80001fb935e8,ffff80001fb93630) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001fb936b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5ad5debe0f0, count: -9
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Oct 4, 2020, 6:45:16 AM10/4/20
to syzkaller-o...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 06d46252 phb(4)
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=10a9777b900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=158715a3900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d80de2...@syzkaller.appspotmail.com
panic: malloc: allocation too large, type = 98, size = 760898376
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*366334 70733 0 0x2 0 0 syz-executor3062
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
rbx 0xffff80001d91f200
r11 0xb62d605af128619b
r12 0x3000000008
r13 0xffff80001d91f2a0
flags process=2<EXEC,8ORPHAN> proc=0
pri=53, usrpri=53, nice=20
forw=0xffffffffffffffff, list=0xffff80001d8fcc68,0xffffffff827db0d8
process=0xffff80001d8fe3c8 user=0xffff80001d91a000, vmspace=0xfffffd806bc0a880
estcpu=3, cpticks=0, pctcpu=0.0
58819 206191 7567 0 3 0x10008a pause ksh
7567 41459 83690 0 3 0x92 select sshd
32299 496488 1 0 3 0x100083 ttyin getty
83690 168893 1 0 3 0x80 select sshd
7862 194759 12669 73 3 0x100090 kqread syslogd
12669 342253 1 0 3 0x100082 netio syslogd
28075 477893 1 77 3 0x100090 poll dhclient
27706 414274 1 0 3 0x80 poll dhclient
25846 407789 0 0 3 0x14200 bored smr
93397 276521 0 0 2 0x14200 zerothread
52438 238550 0 0 3 0x14200 aiodoned aiodoned
61459 271481 0 0 3 0x14200 syncer update
7475 268871 0 0 3 0x14200 cleaner cleaner
38162 215346 0 0 3 0x14200 reaper reaper
15405 76264 0 0 3 0x14200 pgdaemon pagedaemon
93380 407255 0 0 3 0x14200 bored crynlk
62787 459969 0 0 3 0x14200 bored crypto
74577 293832 0 0 3 0x40014200 acpi0 acpi0
14677 51560 0 0 3 0x14200 bored softnet
43145 112191 0 0 3 0x14200 bored systqmp
72837 146343 0 0 3 0x14200 bored systq
21883 449755 0 0 3 0x40014200 bored softclock
31651 185149 0 0 3 0x40014200 idle0
1 521466 0 0 3 0x82 wait init
pcb 13 8K 8K 78643K 13 0
rtable 61 1K 2K 78643K 117 0
ifaddr 24 7K 7K 78643K 24 0
counters 19 16K 16K 78643K 19 0
ioctlops 0 0K 2K 78643K 13 0
proc 47 38K 46K 78643K 284 0
exec 0 0K 2K 78643K 261 0
UVM aobj 3 2K 2K 78643K 3 0
temp 18 3945K 4009K 78643K 1435 0
kqueue 2 2K 2K 78643K 2 0
rtpcb 96 15 0 13 1 0 1 1 0 8 0
rtentry 112 23 0 1 1 0 1 1 0 8 0
unpcb 120 27 0 19 1 0 1 1 0 8 0
syncache 272 5 0 5 2 1 1 1 0 8 1
tcpcb 592 8 0 5 1 0 1 1 0 8 0
inpcb 296 22 0 16 1 0 1 1 0 8 0
art_table 32 98 0 0 1 0 1 1 0 8 0
art_node 16 22 0 2 1 0 1 1 0 8 0
ffsino 240 1389 0 15 81 0 81 81 0 8 0
nchpl 144 1563 0 31 57 0 57 57 0 8 0
uvmvnodes 72 1398 0 0 26 0 26 26 0 8 0
vnodes 208 1398 0 0 74 0 74 74 0 8 0
namei 1024 3489 0 3489 2 1 1 1 0 8 1
scxspl 192 3094 0 3094 1 0 1 1 0 8 1
plimitpl 152 13 0 8 1 0 1 1 0 8 0
sigapl 424 191 0 166 4 0 4 4 0 8 0
knotepl 112 5 0 0 1 0 1 1 0 8 0
kqueuepl 152 1 0 0 1 0 1 1 0 8 0
pipepl 272 57 0 53 2 1 1 1 0 8 0
fdescpl 432 177 0 166 2 0 2 2 0 8 0
filepl 120 822 0 779 2 0 2 2 0 8 0
lockfpl 104 5 0 4 1 0 1 1 0 8 0
lockfspl 48 3 0 2 1 0 1 1 0 8 0
sessionpl 120 17 0 9 1 0 1 1 0 8 0
pgrppl 48 17 0 9 1 0 1 1 0 8 0
ucredpl 96 57 0 50 1 0 1 1 0 8 0
zombiepl 144 166 0 166 2 1 1 1 0 8 1
processpl 944 191 0 166 4 0 4 4 0 8 0
procpl 632 191 0 166 3 0 3 3 0 8 0
sockpl 400 64 0 48 2 0 2 2 0 8 0
mcl4k 4096 10 0 10 2 1 1 1 0 8 1
mcl2k 2048 5409 0 5381 8 2 6 6 0 8 2
bufpl 280 1837 0 105 124 0 124 124 0 8 0
anonpl 16 17691 0 16566 7 2 5 7 0 107 0
amapchunkpl 152 468 0 433 3 1 2 3 0 158 0
amappl16 192 73 0 69 1 0 1 1 0 8 0
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl13 168 12 0 11 2 1 1 1 0 8 0
amappl12 160 6 0 6 1 1 0 1 0 8 0
amappl11 152 39 0 30 1 0 1 1 0 8 0
amappl10 144 7 0 5 1 0 1 1 0 8 0
amappl9 136 190 0 190 1 1 0 1 0 8 0
amappl8 128 61 0 57 1 0 1 1 0 8 0
amappl7 120 207 0 205 1 0 1 1 0 8 0
amappl6 112 92 0 81 1 0 1 1 0 8 0
amappl5 104 288 0 281 1 0 1 1 0 8 0
amappl4 96 254 0 230 1 0 1 1 0 8 0
amappl3 88 51 0 46 1 0 1 1 0 8 0
amappl2 80 748 0 700 3 1 2 2 0 8 0
amappl1 72 12784 0 12403 14 6 8 14 0 8 0
amappl 80 349 0 330 1 0 1 1 0 84 0
uaddrrnd 24 177 0 166 1 0 1 1 0 8 0
vmmpekpl 168 5206 0 5192 1 0 1 1 0 8 0
vmmpepl 168 26150 0 25410 44 8 36 44 0 357 2
vmsppl 272 176 0 166 1 0 1 1 0 8 0
pdppl 4096 360 0 332 5 0 5 5 0 8 0
pvpl 32 72251 0 69521 29 3 26 26 0 265 1
pmappl 200 176 0 166 1 0 1 1 0 8 0
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
ddb>
HEAD commit: 06d46252 phb(4)
git tree: openbsd
kernel config: https://syzkaller.appspot.com/x/.config?x=fe55924c11e64b0a
dashboard link: https://syzkaller.appspot.com/bug?extid=d80de26a8db6c009d060
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=120d342b900000
dashboard link: https://syzkaller.appspot.com/bug?extid=d80de26a8db6c009d060
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=158715a3900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d80de2...@syzkaller.appspotmail.com
panic: malloc: allocation too large, type = 98, size = 760898376
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a880,ffff80001d91f5d8,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd81c0, count: 6
end of kernel
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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
malloc: allocation too large, type = 98, size = 760898376
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a880,ffff80001d91f5d8,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
reports. Insufficient info makes it difficult to find and fix bugs.
ddb>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
malloc: allocation too large, type = 98, size = 760898376
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd81c0, count: -9
end of kernel
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80001d91f1f0
rdi 0
rsi 0x1
rbx 0xffff80001d91f200
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff811f91f0 kprintf+0x140
r9 0x1
r10 0x83ad1e7d3c1054f5
rcx 0x2
rax 0x1
r8 0xffffffff811f91f0 kprintf+0x140
r9 0x1
r11 0xb62d605af128619b
r12 0x3000000008
r13 0xffff80001d91f2a0
r14 0x100
r15 0x1
rip 0xffffffff81506bd8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80001d91f1e0
r15 0x1
rip 0xffffffff81506bd8 db_enter+0x18
cs 0x8
rflags 0x246
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor3062) pid=366334 stat=onproc
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
flags process=2<EXEC,8ORPHAN> proc=0
pri=53, usrpri=53, nice=20
forw=0xffffffffffffffff, list=0xffff80001d8fcc68,0xffffffff827db0d8
process=0xffff80001d8fe3c8 user=0xffff80001d91a000, vmspace=0xfffffd806bc0a880
estcpu=3, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*70733 366334 58819 0 7 0x2 syz-executor3062
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
58819 206191 7567 0 3 0x10008a pause ksh
7567 41459 83690 0 3 0x92 select sshd
32299 496488 1 0 3 0x100083 ttyin getty
83690 168893 1 0 3 0x80 select sshd
7862 194759 12669 73 3 0x100090 kqread syslogd
12669 342253 1 0 3 0x100082 netio syslogd
28075 477893 1 77 3 0x100090 poll dhclient
27706 414274 1 0 3 0x80 poll dhclient
25846 407789 0 0 3 0x14200 bored smr
93397 276521 0 0 2 0x14200 zerothread
52438 238550 0 0 3 0x14200 aiodoned aiodoned
61459 271481 0 0 3 0x14200 syncer update
7475 268871 0 0 3 0x14200 cleaner cleaner
38162 215346 0 0 3 0x14200 reaper reaper
15405 76264 0 0 3 0x14200 pgdaemon pagedaemon
93380 407255 0 0 3 0x14200 bored crynlk
62787 459969 0 0 3 0x14200 bored crypto
74577 293832 0 0 3 0x40014200 acpi0 acpi0
14677 51560 0 0 3 0x14200 bored softnet
43145 112191 0 0 3 0x14200 bored systqmp
72837 146343 0 0 3 0x14200 bored systq
21883 449755 0 0 3 0x40014200 bored softclock
31651 185149 0 0 3 0x40014200 idle0
1 521466 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9438 6318K 6319K 78643K 10536 0
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
pcb 13 8K 8K 78643K 13 0
rtable 61 1K 2K 78643K 117 0
ifaddr 24 7K 7K 78643K 24 0
counters 19 16K 16K 78643K 19 0
ioctlops 0 0K 2K 78643K 13 0
mount 1 1K 1K 78643K 1 0
vnodes 1182 74K 74K 78643K 1187 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
UFS mount 5 36K 36K 78643K 5 0
VM map 2 0K 0K 78643K 2 0
sem 2 0K 0K 78643K 2 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 195K 288K 78643K 12938 0
file desc 1 0K 0K 78643K 1 0
ACPI 1809 195K 288K 78643K 12938 0
proc 47 38K 46K 78643K 284 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 11 0K 0K 78643K 11 0
NFS daemon 1 16K 16K 78643K 1 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 19 95K 95K 78643K 19 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
exec 0 0K 2K 78643K 261 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 32 1K 2K 78643K 511 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM aobj 3 2K 2K 78643K 3 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 3 0K 0K 78643K 3 0
crypto data 1 1K 1K 78643K 1 0
temp 18 3945K 4009K 78643K 1435 0
kqueue 2 2K 2K 78643K 2 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 2 0 0 1 0 1 1 0 8 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 96 15 0 13 1 0 1 1 0 8 0
rtentry 112 23 0 1 1 0 1 1 0 8 0
unpcb 120 27 0 19 1 0 1 1 0 8 0
syncache 272 5 0 5 2 1 1 1 0 8 1
tcpcb 592 8 0 5 1 0 1 1 0 8 0
inpcb 296 22 0 16 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 97 0 0 7 0 7 7 0 8 0
art_table 32 98 0 0 1 0 1 1 0 8 0
art_node 16 22 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1389 0 15 86 0 86 86 0 8 0
ffsino 240 1389 0 15 81 0 81 81 0 8 0
nchpl 144 1563 0 31 57 0 57 57 0 8 0
uvmvnodes 72 1398 0 0 26 0 26 26 0 8 0
vnodes 208 1398 0 0 74 0 74 74 0 8 0
namei 1024 3489 0 3489 2 1 1 1 0 8 1
scxspl 192 3094 0 3094 1 0 1 1 0 8 1
plimitpl 152 13 0 8 1 0 1 1 0 8 0
sigapl 424 191 0 166 4 0 4 4 0 8 0
knotepl 112 5 0 0 1 0 1 1 0 8 0
kqueuepl 152 1 0 0 1 0 1 1 0 8 0
pipepl 272 57 0 53 2 1 1 1 0 8 0
fdescpl 432 177 0 166 2 0 2 2 0 8 0
filepl 120 822 0 779 2 0 2 2 0 8 0
lockfpl 104 5 0 4 1 0 1 1 0 8 0
lockfspl 48 3 0 2 1 0 1 1 0 8 0
sessionpl 120 17 0 9 1 0 1 1 0 8 0
pgrppl 48 17 0 9 1 0 1 1 0 8 0
ucredpl 96 57 0 50 1 0 1 1 0 8 0
zombiepl 144 166 0 166 2 1 1 1 0 8 1
processpl 944 191 0 166 4 0 4 4 0 8 0
procpl 632 191 0 166 3 0 3 3 0 8 0
sockpl 400 64 0 48 2 0 2 2 0 8 0
mcl4k 4096 10 0 10 2 1 1 1 0 8 1
mcl2k 2048 5409 0 5381 8 2 6 6 0 8 2
mtagpl 96 2 0 2 1 1 0 1 0 8 0
mbufpl 256 9410 0 9369 5 1 4 4 0 8 0
bufpl 280 1837 0 105 124 0 124 124 0 8 0
anonpl 16 17691 0 16566 7 2 5 7 0 107 0
amapchunkpl 152 468 0 433 3 1 2 3 0 158 0
amappl16 192 73 0 69 1 0 1 1 0 8 0
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl13 168 12 0 11 2 1 1 1 0 8 0
amappl12 160 6 0 6 1 1 0 1 0 8 0
amappl11 152 39 0 30 1 0 1 1 0 8 0
amappl10 144 7 0 5 1 0 1 1 0 8 0
amappl9 136 190 0 190 1 1 0 1 0 8 0
amappl8 128 61 0 57 1 0 1 1 0 8 0
amappl7 120 207 0 205 1 0 1 1 0 8 0
amappl6 112 92 0 81 1 0 1 1 0 8 0
amappl5 104 288 0 281 1 0 1 1 0 8 0
amappl4 96 254 0 230 1 0 1 1 0 8 0
amappl3 88 51 0 46 1 0 1 1 0 8 0
amappl2 80 748 0 700 3 1 2 2 0 8 0
amappl1 72 12784 0 12403 14 6 8 14 0 8 0
amappl 80 349 0 330 1 0 1 1 0 84 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
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 2 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
uaddrrnd 24 177 0 166 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 177 0 166 1 0 1 1 0 8 0
vmmpekpl 168 5206 0 5192 1 0 1 1 0 8 0
vmmpepl 168 26150 0 25410 44 8 36 44 0 357 2
vmsppl 272 176 0 166 1 0 1 1 0 8 0
pdppl 4096 360 0 332 5 0 5 5 0 8 0
pvpl 32 72251 0 69521 29 3 26 26 0 265 1
pmappl 200 176 0 166 1 0 1 1 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 209 0 9 6 0 6 6 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a880,ffff80001d91f5d8,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd81c0, count: -9
end of kernel
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
uvm_mapanon(fffffd806bc0a880,ffff80001d91f5d8,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218
malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344
amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338
amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline]
sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423
syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd81c0, count: -9
end of kernel
ddb>
Anton Lindqvist
Oct 5, 2020, 1:38:02 AM10/5/20
to syzbot, syzkaller-o...@googlegroups.com
#syz fix: Recent changes for PROT_NONE pages to not count against resource limits, failed to note this also guarded against heavy amap allocations in the MAP_SHARED case. Bring back the checks for MAP_SHARED from semarie, ok kettenis https://syzkaller.appspot.com/bug?extid=d80de26a8db6c009d060
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