DigiGoon/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

jfs: array-index-out-of-bounds fix in dtReadFirst

Browse source 
[ Upstream commit ca84a2c9be482836b86d780244f0357e5a778c46 ]

The value of stbl can be sometimes out of bounds due
to a bad filesystem. Added a check with appopriate return
of error code in that case.

Reported-by: syzbot+65fa06e29859e41a83f3@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=65fa06e29859e41a83f3
Signed-off-by: Ghanshyam Agrawal <ghanshyam1898@gmail.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ghanshyam Agrawal 2024-09-28 14:07:22 +05:30 • committed by Greg Kroah-Hartman
parent 685ee05004
commit 25f1e673ef
1 changed files with 7 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
fs/jfs/jfs_dtree.c
View file

@ -3382,6 +3382,13 @@ static int dtReadFirst(struct inode *ip, struct btstack * btstack)
/* get the leftmost entry */ /* get the leftmost entry */
stbl = DT_GETSTBL(p); stbl = DT_GETSTBL(p);
if (stbl[0] < 0 || stbl[0] > 127) {
DT_PUTPAGE(mp);
jfs_error(ip->i_sb, "stbl[0] out of bound\n");
return -EIO;
}
xd = (pxd_t *) & p->slot[stbl[0]]; xd = (pxd_t *) & p->slot[stbl[0]];
/* get the child page block address */ /* get the child page block address */