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bsg: fix potential error pointer dereference
Dan writes: block/bsg.c:327 bsg_map_hdr() error: 'next_rq' dereferencing possible ERR_PTR(). Fix this by setting next_rq to NULL, for the case where it can be != NULL but an error pointer. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jens Axboe <axboe@fb.com>
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@ -287,6 +287,7 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
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next_rq = blk_get_request(q, READ, GFP_KERNEL);
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if (IS_ERR(next_rq)) {
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ret = PTR_ERR(next_rq);
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next_rq = NULL;
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goto out;
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}
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rq->next_rq = next_rq;
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