Commit 1b9d6828 authored Oct 25, 2023 by Manas Ghandat Committed by Greg Kroah-Hartman Feb 23, 2024

jfs: fix slab-out-of-bounds Read in dtSearch



[ Upstream commit fa5492ee89463a7590a1449358002ff7ef63529f ]

Currently while searching for current page in the sorted entry table
of the page there is a out of bound access. Added a bound check to fix
the error.

Dave:
Set return code to -EIO

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202310241724.Ed02yUz9-lkp@intel.com/


Signed-off-by: Manas Ghandat <ghandatmanas@gmail.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent fd3486a8

fs/jfs/jfs_dtree.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -633,6 +633,11 @@ int dtSearch(struct inode ip, struct component_name key, ino_t * data,
		for (base = 0, lim = p->header.nextindex; lim; lim >>= 1) {
		index = base + (lim >> 1);

		if (stbl[index] < 0) {
		rc = -EIO;
		goto out;
		}

		if (p->header.flag & BT_LEAF) {
		/* uppercase leaf name to compare */
		cmp =