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[305/622] lnet: adds checking msg len

Message ID 1582838290-17243-306-git-send-email-jsimmons@infradead.org (mailing list archive)
State New, archived
Headers show
Series lustre: sync closely to 2.13.52 | expand

Commit Message

James Simmons Feb. 27, 2020, 9:12 p.m. UTC
From: Alexander Boyko <c17825@cray.com>

The LNET can't handle a msg with len larger than LNET_MTU.
The next error occurred for DOM 1MB
 LNetError: 3137:0:(lib-move.c:4143:lnet_parse()),
 src bad PUT payload 1051832 (1048576 max expected)

The patch adds fragment size check.

WC-bug-id: https://jira.whamcloud.com/browse/LU-12140
Lustre-commit: 4d43a6c3b182 ("LU-12140 lnet: adds checking msg len")
Signed-off-by: Alexander Boyko <c17825@cray.com>
Cray-bug-id: LUS-7174
Reviewed-on: https://review.whamcloud.com/34975
Reviewed-by: Alexey Lyashkov <c17817@cray.com>
Reviewed-by: Mike Pershin <mpershin@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
 net/lnet/lnet/lib-md.c | 4 ++++
 1 file changed, 4 insertions(+)
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diff --git a/net/lnet/lnet/lib-md.c b/net/lnet/lnet/lib-md.c
index 7ea0f5e..4a70c76 100644
--- a/net/lnet/lnet/lib-md.c
+++ b/net/lnet/lnet/lib-md.c
@@ -325,6 +325,10 @@  int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset)
 		CERROR("Invalid option: too many fragments %u, %d max\n",
 		       umd->length, LNET_MAX_IOV);
 		return -EINVAL;
+	} else if (umd->length > LNET_MTU) {
+		CERROR("Invalid length: too big fragment size %u, %d max\n",
+		       umd->length, LNET_MTU);
+		return -EINVAL;
 	return 0;