[PATCH 1/2] IB/core: Use memdup_user() rather than duplicating its implementation
From: SF Markus Elfring <hidden>
Date: 2016-08-21 17:43:07
Also in:
linux-rdma, lkml
Subsystem:
infiniband subsystem, the rest · Maintainers:
Jason Gunthorpe, Leon Romanovsky, Linus Torvalds
From: Markus Elfring <redacted> Date: Sun, 21 Aug 2016 18:45:22 +0200 Reuse existing functionality from memdup_user() instead of keeping duplicate source code. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <redacted> --- include/rdma/ib_verbs.h | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 6f667dd..033610b 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h@@ -2205,16 +2205,11 @@ static inline bool ib_is_udata_cleared(struct ib_udata *udata, if (len > USHRT_MAX) return false; - buf = kmalloc(len, GFP_KERNEL); - if (!buf) + buf = memdup_user(p, len); + if (IS_ERR(buf)) return false; - if (copy_from_user(buf, p, len)) - goto free; - ret = !memchr_inv(buf, 0, len); - -free: kfree(buf); return ret; }
--
2.9.3