Cluster Project branch, master, updated. gfs-kernel_0_1_22-70-g5c00e23

[ccaulfield@sourceware.org]

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- Log -----------------------------------------------------------------
commit 5c00e231b21d2b8e0be1b4dd028122313e603597
Author: Christine Caulfield <ccaulfie@redhat.com>
Date:   Thu Mar 13 16:39:38 2008 +0000

    [DLM] Don't segfault if lvbptr is NULL
    
    Calling dlm_lock* with  LKF_VALBLK and sb_lvbptr set
    to NULL could cause libdlm to segfault.
    
    Now it returns -1/EINVAL
    
    Signed-off-by: Christine Caulfield <ccaulfie@redhat.com>

-----------------------------------------------------------------------

Summary of changes:
 dlm/lib/libdlm.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/dlm/lib/libdlm.c b/dlm/lib/libdlm.c
index 28a3cc7..7464085 100644
--- a/dlm/lib/libdlm.c
+++ b/dlm/lib/libdlm.c
@@ -889,6 +889,11 @@ static int ls_lock(dlm_lshandle_t ls,
 		return -1;
 	}
 
+	if (flags & LKF_VALBLK && !lksb->sb_lvbptr) {
+		errno = EINVAL;
+		return -1;
+	}
+
 	if (kernel_version.version[0] == 5)
 		return ls_lock_v5(ls, mode, lksb, flags, name, namelen, parent,
 				  astaddr, astarg, bastaddr);


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