MirrorHub/construct
0
0
Fork 0
mirror of https://github.com/matrix-construct/construct synced 2024-10-06 07:38:52 +02:00
Code Issues Releases Wiki Activity

linebuf: Fix possible memory corruption when receiving many CR/LF.

Browse source 
The last byte of balloc.c's block pointer could be changed from 10 or 13 to
0. On amd64, this is not possible. On i386, this is possible and usually
causes a crash soon.
This commit is contained in:
Jilles Tjoelker 2014-10-10 23:56:16 +02:00
parent 5d4a99540b
commit 1c864688bb
1 changed files with 2 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
libratbox/src/linebuf.c
View file

@ -224,7 +224,8 @@ rb_linebuf_copy_line(buf_head_t * bufhead, buf_line_t * bufline, char *data, int
/* This is the ~overflow case..This doesn't happen often.. */
if(cpylen > (BUF_DATA_SIZE - bufline->len - 1))
{
memcpy(bufch, ch, (BUF_DATA_SIZE - bufline->len - 1));
cpylen = BUF_DATA_SIZE - bufline->len - 1;
memcpy(bufch, ch, cpylen);
bufline->buf[BUF_DATA_SIZE - 1] = '\0';
bufch = bufline->buf + BUF_DATA_SIZE - 2;
while(cpylen && (*bufch == '\r' || *bufch == '\n'))