From: Bragatheswaran Manickavel <bragathemanick0908@gmail.com>
To: reiserfs-devel@vger.kernel.org
Cc: Bragatheswaran Manickavel <bragathemanick0908@gmail.com>,
linux-kernel@vger.kernel.org,
syzbot+e5bb9eb00a5a5ed2a9a2@syzkaller.appspotmail.com
Subject: [PATCH] reiserfs: UBSAN: array-index-out-of-bounds in direntry_create_vi
Date: Thu, 26 Oct 2023 18:26:16 +0530 [thread overview]
Message-ID: <20231026125616.1859-1-bragathemanick0908@gmail.com> (raw)
deh defined as an array of type __u16[], and issue is
triggered when it's trying to access an element at
index 1, which is out of bounds because the array
has only one element at index 0.
Reported-by: syzbot+e5bb9eb00a5a5ed2a9a2@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=e5bb9eb00a5a5ed2a9a2
Signed-off-by: Bragatheswaran Manickavel <bragathemanick0908@gmail.com>
---
fs/reiserfs/item_ops.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/reiserfs/item_ops.c b/fs/reiserfs/item_ops.c
index 3a5a752d96c7..ccf547c5e8e1 100644
--- a/fs/reiserfs/item_ops.c
+++ b/fs/reiserfs/item_ops.c
@@ -484,7 +484,7 @@ static int direntry_create_vi(struct virtual_node *vn,
vn->vn_mode);
dir_u->entry_sizes[i] =
(j ? deh_location(&deh[j - 1]) : ih_item_len(vi->vi_ih)) -
- deh_location(&deh[j]) + DEH_SIZE;
+ deh_location(&deh[j - 1]) + DEH_SIZE;
}
size += (dir_u->entry_count * sizeof(short));
--
2.34.1
next reply other threads:[~2023-10-26 12:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-26 12:56 Bragatheswaran Manickavel [this message]
2023-11-04 12:58 ` [PATCH] reiserfs: UBSAN: array-index-out-of-bounds in direntry_create_vi Bragatheswaran Manickavel
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