diff options
| author | Manas Ghandat <ghandatmanas@gmail.com> | 2023-10-04 10:40:40 +0300 |
|---|---|---|
| committer | Dave Kleikamp <dave.kleikamp@oracle.com> | 2023-10-04 17:18:03 +0300 |
| commit | 05d9ea1ceb62a55af6727a69269a4fd310edf483 (patch) | |
| tree | 7ddef40066c70bc93e0d0acf214df04b56e1d859 /fs/jfs | |
| parent | 22cad8bc1d36547cdae0eef316c47d917ce3147c (diff) | |
| download | linux-05d9ea1ceb62a55af6727a69269a4fd310edf483.tar.xz | |
jfs: fix array-index-out-of-bounds in diAlloc
Currently there is not check against the agno of the iag while
allocating new inodes to avoid fragmentation problem. Added the check
which is required.
Reported-by: syzbot+79d792676d8ac050949f@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=79d792676d8ac050949f
Signed-off-by: Manas Ghandat <ghandatmanas@gmail.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Diffstat (limited to 'fs/jfs')
| -rw-r--r-- | fs/jfs/jfs_imap.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c index 923a58422c46..1b267eec3f36 100644 --- a/fs/jfs/jfs_imap.c +++ b/fs/jfs/jfs_imap.c @@ -1320,7 +1320,7 @@ diInitInode(struct inode *ip, int iagno, int ino, int extno, struct iag * iagp) int diAlloc(struct inode *pip, bool dir, struct inode *ip) { int rc, ino, iagno, addext, extno, bitno, sword; - int nwords, rem, i, agno; + int nwords, rem, i, agno, dn_numag; u32 mask, inosmap, extsmap; struct inode *ipimap; struct metapage *mp; @@ -1356,6 +1356,9 @@ int diAlloc(struct inode *pip, bool dir, struct inode *ip) /* get the ag number of this iag */ agno = BLKTOAG(JFS_IP(pip)->agstart, JFS_SBI(pip->i_sb)); + dn_numag = JFS_SBI(pip->i_sb)->bmap->db_numag; + if (agno < 0 || agno > dn_numag) + return -EIO; if (atomic_read(&JFS_SBI(pip->i_sb)->bmap->db_active[agno])) { /* |