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| author | Ming Lei <ming.lei@redhat.com> | 2024-10-31 19:02:24 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-10-31 07:40:34 -0600 |
| commit | 496a51b37143c690a06612a6bd58827ef2341761 (patch) | |
| tree | 60d2a9a84c55f3febede757ed57bf020efa638d6 | |
| parent | 133008e84b99e4f5f8cf3d8b768c995732df9406 (diff) | |
| download | linux-496a51b37143c690a06612a6bd58827ef2341761.tar.gz linux-496a51b37143c690a06612a6bd58827ef2341761.tar.bz2 linux-496a51b37143c690a06612a6bd58827ef2341761.zip | |
lib/iov_iter.c: initialize bi.bi_idx before iterating over bvec
Initialize bi.bi_idx as 0 before iterating over bvec, otherwise
garbage data can be used as ->bi_idx.
Cc: Christoph Hellwig <hch@lst.de>
Reported-and-tested-by: Klara Modin <klarasmodin@gmail.com>
Fixes: e4e535bff2bc ("iov_iter: don't require contiguous pages in iov_iter_extract_bvec_pages")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | lib/iov_iter.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 9fc06f5fb748..c761f6db3cb4 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -1699,6 +1699,7 @@ static ssize_t iov_iter_extract_bvec_pages(struct iov_iter *i, i->bvec++; skip = 0; } + bi.bi_idx = 0; bi.bi_size = maxsize + skip; bi.bi_bvec_done = skip; |