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authorDave Watson <davejwatson@fb.com>2018-01-19 12:30:13 -0800
committerDavid S. Miller <davem@davemloft.net>2018-01-22 16:25:21 -0500
commit7a8c4dd9be91a7e8f8f0e0419a560663adc694a3 (patch)
tree99ba58543d67842199c468baff1cac8d272e0c14 /net
parent52acf06451930eb4cefabd5ecea56e2d46c32f76 (diff)
tls: Correct length of scatterlist in tls_sw_sendpage
The scatterlist is reused by both sendmsg and sendfile. If a sendmsg of smaller number of pages is followed by a sendfile of larger number of pages, the scatterlist may be too short, resulting in a crash in gcm_encrypt. Add sg_unmark_end to make the list the correct length. tls_sw_sendmsg already calls sg_unmark_end correctly when it allocates memory in alloc_sg, or in zerocopy_from_iter. Signed-off-by: Dave Watson <davejwatson@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/tls/tls_sw.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 61f394d369bf..0a9b72fbd761 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -577,6 +577,8 @@ alloc_payload:
get_page(page);
sg = ctx->sg_plaintext_data + ctx->sg_plaintext_num_elem;
sg_set_page(sg, page, copy, offset);
+ sg_unmark_end(sg);
+
ctx->sg_plaintext_num_elem++;
sk_mem_charge(sk, copy);