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This is a patch that re-edited the relevant part to >> comply with the rules. >> >> Thanks. >> > > I have just discovered that the patch I sent last time has been left > unattended. It appears that the vulnerability continues to occur in > version 6.10.0-rc1. I would appreciate it if you could review the patch > and let me know what might be wrong with it. Sorry this has taken me so long. Applied. > > Regards > > Reported-by: syzbot+241c815bda521982cb49@syzkaller.appspotmail.com > Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") > Signed-off-by: Jeongjun Park > --- > fs/jfs/jfs_imap.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c > index 2ec35889ad24..1407feccbc2d 100644 > --- a/fs/jfs/jfs_imap.c > +++ b/fs/jfs/jfs_imap.c > @@ -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;