xfs: fix buffer overruns in xfs_ioc_attr_list

When we converted the al_offset array in struct xfs_attrlist into a VLA,
the size of the object shrank by 4 bytes.  Unfortunately, the buffer
size validation in the attrlist ioctl wasn't updated to notice this, so
the al_offset[0] assignment blindly writes off the end of the buffer.
LOLLM noticed the omitted check and complained.

Cc: stable@vger.kernel.org # v6.5
Fixes: 371baf5c9750a2 ("xfs: convert flex-array declarations in struct xfs_attrlist*")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Assisted-by: LOLLM # finding obvious bugs
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

0 files changed, 0 insertions, 0 deletions