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| author | David Howells <dhowells@redhat.com> | 2023-09-08 19:03:20 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-09-10 01:11:49 +0300 |
| commit | f741bd7178c95abd7aeac5a9d933ee542f9a5509 (patch) | |
| tree | 2daa2aee81598fcf690d39ac2424ef90173c00b9 /lib/logic_iomem.c | |
| parent | 6b8bb5b8d9b35fb43f0dbf9fd91b7d35e6232e08 (diff) | |
| download | linux-f741bd7178c95abd7aeac5a9d933ee542f9a5509.tar.xz | |
iov_iter: Fix iov_iter_extract_pages() with zero-sized entries
iov_iter_extract_pages() doesn't correctly handle skipping over initial
zero-length entries in ITER_KVEC and ITER_BVEC-type iterators.
The problem is that it accidentally reduces maxsize to 0 when it
skipping and thus runs to the end of the array and returns 0.
Fix this by sticking the calculated size-to-copy in a new variable
rather than back in maxsize.
Fixes: 7d58fe731028 ("iov_iter: Add a function to extract a page list from an iterator")
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: David Hildenbrand <david@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/logic_iomem.c')
0 files changed, 0 insertions, 0 deletions