sikkienl/dash
1
0
Fork 0
mirror of https://github.com/dashpay/dash.git synced 2024-12-25 12:02:48 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Merge #9693: Prevent integer overflow in ReadVarInt.

Browse Source 
45f0961 Prevent integer overflow in ReadVarInt. (Gregory Maxwell)

Tree-SHA512: 385ea0efb6b59d44c45a49227e5f6fff236b4775544cbeb236312a3fd87fd75c226ac56f7aa1bca66b853639da75a579610074f7582f92cf2ebd4a74bc40f6f0
This commit is contained in:
Pieter Wuille 2017-04-17 04:46:34 -07:00 committed by Pasta
parent 0db1328a24
commit 632956a806
No known key found for this signature in database
GPG Key ID: 0B8EB7A31A44D9C6
1 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/serialize.h
View File

@ -352,11 +352,18 @@ I ReadVarInt(Stream& is)
I n = 0; I n = 0;
while(true) { while(true) {
unsigned char chData = ser_readdata8(is); unsigned char chData = ser_readdata8(is);
if (n > (std::numeric_limits<I>::max() >> 7)) {
throw std::ios_base::failure("ReadVarInt(): size too large");
}
n = (n << 7) | (chData & 0x7F); n = (n << 7) | (chData & 0x7F);
if (chData & 0x80) if (chData & 0x80) {
if (n == std::numeric_limits<I>::max()) {
throw std::ios_base::failure("ReadVarInt(): size too large");
}
n++; n++;
else } else {
return n; return n;
}
} }
} }