Master/upx
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Improve robustness of seek() by adding some sanity checks.

Browse Source
This commit is contained in:
Markus F.X.J. Oberhumer
2016-10-06 12:11:32 +02:00
parent 8f5e89c900
commit 022ba32c1a
2 changed files with 11 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/file.cpp
+8 -4
View File
@@ -168,8 +168,10 @@ void FileBase::write(const void *buf, int len)
}
off_t FileBase::seek(off_t off, int whence)
off_t FileBase::seek(upx_int64_t off64, int whence)
{
(void) mem_size(1, off64 >= 0 ? off64 : -off64); // sanity check
off_t off = ACC_ICONV(off_t, off64);
if (!isOpen())
throwIOException("bad seek 1");
if (whence == SEEK_SET) {
@@ -285,9 +287,9 @@ int InputFile::readx(MemBuffer &buf, int len)
}
off_t InputFile::seek(off_t off, int whence)
off_t InputFile::seek(upx_int64_t off64, int whence)
{
off_t pos = super::seek(off,whence);
off_t pos = super::seek(off64, whence);
if (_length < pos)
throwIOException("bad seek 4");
return pos;
@@ -402,8 +404,10 @@ void OutputFile::rewrite(const void *buf, int len)
bytes_written -= len; // restore
}
off_t OutputFile::seek(off_t off, int whence)
off_t OutputFile::seek(upx_int64_t off64, int whence)
{
(void) mem_size(1, off64 >= 0 ? off64 : -off64); // sanity check
off_t off = ACC_ICONV(off_t, off64);
assert(!opt->to_stdout);
switch (whence) {
case SEEK_SET: {