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jfs: Fix array-index-out-of-bounds in diFree

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Reported-by: syzbot+241c815bda521982cb49@syzkaller.appspotmail.com
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Jeongjun Park <aha310510@gmail.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
This commit is contained in:
Jeongjun Park 2024-05-30 22:28:09 +09:00 committed by Dave Kleikamp
parent ce6dede912
commit f73f969b2e
1 changed files with 4 additions and 1 deletions
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5
fs/jfs/jfs_imap.c
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@ -290,7 +290,7 @@ int diSync(struct inode *ipimap)
int diRead(struct inode *ip)
{
struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
int iagno, ino, extno, rc;
int iagno, ino, extno, rc, agno;
struct inode *ipimap;
struct dinode *dp;
struct iag *iagp;
@ -339,8 +339,11 @@ int diRead(struct inode *ip)
/* get the ag for the iag */
agstart = le64_to_cpu(iagp->agstart);
agno = BLKTOAG(agstart, JFS_SBI(ip->i_sb));
release_metapage(mp);
if (agno >= MAXAG || agno < 0)
return -EIO;
rel_inode = (ino & (INOSPERPAGE - 1));
pageno = blkno >> sbi->l2nbperpage;