Commit 531aa0f0 authored Oct 22, 2024 by Dave Kleikamp Committed by Harshit Mogalapalli Feb 07, 2025

jfs: Fix sanity check in dbMount



[ Upstream commit 67373ca8404fe57eb1bb4b57f314cff77ce54932 ]

MAXAG is a legitimate value for bmp->db_numag

Fixes: e63866a47556 ("jfs: fix out-of-bounds in dbNextAG() and diAlloc()")

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit ea462ee11dbc4eb779146313d3abf5e5187775e1)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>

parent e33413f7

fs/jfs/jfs_dmap.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -200,7 +200,7 @@ int dbMount(struct inode *ipbmap)
		}

		bmp->db_numag = le32_to_cpu(dbmp_le->dn_numag);
		if (!bmp->db_numag \|\| bmp->db_numag >= MAXAG) {
		if (!bmp->db_numag \|\| bmp->db_numag > MAXAG) {
		err = -EINVAL;
		goto err_release_metapage;
		}