GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-03-15 11:44:11 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

isofs: Fix out of bound access for corrupted isofs image

Browse source 
commit e96a1866b4 upstream.

When isofs image is suitably corrupted isofs_read_inode() can read data
beyond the end of buffer. Sanity-check the directory entry length before
using it.

Reported-and-tested-by: syzbot+6fc7fb214625d82af7d1@syzkaller.appspotmail.com
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jan Kara 2021-10-18 12:37:41 +02:00 • committed by Justin Hammond
parent eb90e1679f
commit 63e93d35ff
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
fs/isofs/inode.c
View file

@ -1322,6 +1322,8 @@ static int isofs_read_inode(struct inode *inode, int relocated)
de = (struct iso_directory_record *) (bh->b_data + offset);
de_len = *(unsigned char *) de;
if (de_len < sizeof(struct iso_directory_record))
goto fail;
if (offset + de_len > bufsize) {
int frag1 = bufsize - offset;