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

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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>
This commit is contained in:
Manas Ghandat 2023-10-25 11:39:07 +05:30 committed by Dave Kleikamp
parent 27e56f59ba
commit fa5492ee89
1 changed files with 5 additions and 0 deletions
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5
fs/jfs/jfs_dtree.c
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@ -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 =