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- Log -----------------------------------------------------------------
commit 0484ef93e8d09313f8f110d23c2a6a6b4aca2f60
Author: Christine Caulfield <ccaulfie@redhat.com>
Date: Thu Mar 13 16:44:00 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 0612d09..2bdbb0f 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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