lkml.org 
[lkml]   [2023]   [Nov]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH-v2] jfs: fix slab-out-of-bounds Read in dtSearch
From
On 10/25/23 1:09AM, Manas Ghandat wrote:
> 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.

Looks good. I made the small change of setting rc = -EIO in that case,
so we know there is something wrong with the file system.

Thanks,
Shaggy

>
> 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>
> ---
> V1 -> V2 : Removed redundant check on stbl
>
> fs/jfs/jfs_dtree.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c
> index 92b7c533407c..cf67d32d5b7f 100644
> --- a/fs/jfs/jfs_dtree.c
> +++ b/fs/jfs/jfs_dtree.c
> @@ -633,6 +633,9 @@ 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)
> + goto out;
> +
> if (p->header.flag & BT_LEAF) {
> /* uppercase leaf name to compare */
> cmp =

\
 
 \ /
  Last update: 2023-11-01 16:22    [W:0.171 / U:0.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site