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md: bcache: io.c: fix a potential NULL pointer dereference
bio_alloc_bioset returns NULL on failure. This fix adds a missing check for potential NULL pointer dereferencing. Signed-off-by: Kumar Amit Mehta <gmate.amit@gmail.com> Signed-off-by: Kent Overstreet <koverstreet@google.com>
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@ -97,6 +97,8 @@ struct bio *bch_bio_split(struct bio *bio, int sectors,
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if (bio->bi_rw & REQ_DISCARD) {
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ret = bio_alloc_bioset(gfp, 1, bs);
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if (!ret)
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return NULL;
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idx = 0;
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goto out;
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}
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