From: trondmy@kernel.org
To: linux-nfs@vger.kernel.org
Subject: [PATCH 01/16] SUNRPC: _shift_data_left/right_pages should check the shift length
Date: Wed, 9 Dec 2020 09:47:46 -0500 [thread overview]
Message-ID: <20201209144801.700778-2-trondmy@kernel.org> (raw)
In-Reply-To: <20201209144801.700778-1-trondmy@kernel.org>
From: Trond Myklebust <trond.myklebust@hammerspace.com>
Exit early if the shift is zero.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
net/sunrpc/xdr.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index f9efc207a7d5..1d48934bdf9e 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -226,6 +226,9 @@ _shift_data_left_pages(struct page **pages, size_t pgto_base,
BUG_ON(pgfrom_base <= pgto_base);
+ if (!len)
+ return;
+
pgto = pages + (pgto_base >> PAGE_SHIFT);
pgfrom = pages + (pgfrom_base >> PAGE_SHIFT);
@@ -308,6 +311,9 @@ _shift_data_right_pages(struct page **pages, size_t pgto_base,
BUG_ON(pgto_base <= pgfrom_base);
+ if (!len)
+ return;
+
pgto_base += len;
pgfrom_base += len;
@@ -406,6 +412,9 @@ _copy_to_pages(struct page **pages, size_t pgbase, const char *p, size_t len)
char *vto;
size_t copy;
+ if (!len)
+ return;
+
pgto = pages + (pgbase >> PAGE_SHIFT);
pgbase &= ~PAGE_MASK;
@@ -450,6 +459,9 @@ _copy_from_pages(char *p, struct page **pages, size_t pgbase, size_t len)
char *vfrom;
size_t copy;
+ if (!len)
+ return;
+
pgfrom = pages + (pgbase >> PAGE_SHIFT);
pgbase &= ~PAGE_MASK;
--
2.29.2
next prev parent reply other threads:[~2020-12-09 14:49 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-09 14:47 [PATCH 00/16] Fixes for the NFSv4.2 READ_PLUS operation trondmy
2020-12-09 14:47 ` trondmy [this message]
2020-12-09 14:47 ` [PATCH 02/16] SUNRPC: Fixes for xdr_align_data() trondmy
2020-12-09 14:47 ` [PATCH 03/16] SUNRPC: Fix xdr_expand_hole() trondmy
2020-12-09 14:47 ` [PATCH 04/16] SUNRPC: Cleanup xdr_shrink_bufhead() trondmy
2020-12-09 14:47 ` [PATCH 05/16] SUNRPC: _copy_to/from_pages() now check for zero length trondmy
2020-12-09 14:47 ` [PATCH 06/16] SUNRPC: Clean up open coded setting of the xdr_stream 'nwords' field trondmy
2020-12-09 14:47 ` [PATCH 07/16] SUNRPC: Cleanup - constify a number of xdr_buf helpers trondmy
2020-12-09 14:47 ` [PATCH 08/16] SUNRPC: Avoid unnecessary copies in xdr_buf_pages_copy_left/right() trondmy
2020-12-09 14:47 ` [PATCH 09/16] NFSv4.2: Ensure we always reset the result->count in decode_read_plus() trondmy
2020-12-09 14:47 ` [PATCH 10/16] NFSv4.2: decode_read_plus_data() must skip padding after data segment trondmy
2020-12-09 14:47 ` [PATCH 11/16] NFSv4.2: decode_read_plus_hole() needs to check the extent offset trondmy
2020-12-09 14:47 ` [PATCH 12/16] NFSv4.2: Handle hole lengths that exceed the READ_PLUS read buffer trondmy
2020-12-09 14:47 ` [PATCH 13/16] NFSv4.2: Don't error when exiting early on a READ_PLUS buffer overflow trondmy
2020-12-09 14:47 ` [PATCH 14/16] NFSv4.2: Deal with potential READ_PLUS data extent " trondmy
2020-12-09 14:48 ` [PATCH 15/16] nfsd: Fixes for nfsd4_encode_read_plus_data() trondmy
2020-12-09 14:48 ` [PATCH 16/16] nfsd: Don't set eof on a truncated READ_PLUS trondmy
2020-12-09 16:16 ` [PATCH 15/16] nfsd: Fixes for nfsd4_encode_read_plus_data() Chuck Lever
2020-12-09 16:39 ` Trond Myklebust
2020-12-09 16:57 ` Chuck Lever
2020-12-09 17:01 ` Trond Myklebust
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