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staging: lustre: lnet: Do not drop message when shutting down LNet

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There is a case in lnet_parse() where we discover that LNet
is shutting down but we continue to use the NI when we drop the
message and end up calling ko2iblnd_check_send_locked() which tries to
allocate from the Tx pool which has been cleaned up already.
This triggers a NULL pointer dereference.

This fix just returns from lnet_parse() when we disover LNet is
shutting down.

Signed-off-by: Doug Oucharek <doug.s.oucharek@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8106
Reviewed-on: http://review.whamcloud.com/19993
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Liang Zhen <liang.zhen@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Doug Oucharek
2016-08-16 16:19:29 -04:00
committed by Greg Kroah-Hartman
parent bce1bbf4b8
commit e426f0d24e
1 changed files with 3 additions and 0 deletions
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3
drivers/staging/lustre/lnet/lnet/lib-move.c
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@@ -2002,6 +2002,9 @@ lnet_parse(lnet_ni_t *ni, lnet_hdr_t *hdr, lnet_nid_t from_nid,
libcfs_nid2str(from_nid), libcfs_nid2str(src_nid),
lnet_msgtyp2str(type), rc);
lnet_msg_free(msg);
if (rc == -ESHUTDOWN)
/* We are shutting down. Don't do anything more */
return 0;
goto drop;
}