From: David Teigland <teigland@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Al Viro <viro@zeniv.linux.org.uk>
Subject: [PATCH 11/16] dlm: fix overflows when copying from ->m_extra to lvb
Date: Thu, 7 Feb 2008 00:09:14 -0600 [thread overview]
Message-ID: <1202364559-9201-12-git-send-email-teigland@redhat.com> (raw)
From: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David Teigland <teigland@redhat.com>
---
fs/dlm/lock.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 6d98cf9..5b82187 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -1226,6 +1226,8 @@ static void set_lvb_lock_pc(struct dlm_rsb *r, struct dlm_lkb *lkb,
b = dlm_lvb_operations[lkb->lkb_grmode + 1][lkb->lkb_rqmode + 1];
if (b == 1) {
int len = receive_extralen(ms);
+ if (len > DLM_RESNAME_MAXLEN)
+ len = DLM_RESNAME_MAXLEN;
memcpy(lkb->lkb_lvbptr, ms->m_extra, len);
lkb->lkb_lvbseq = ms->m_lvbseq;
}
@@ -2993,6 +2995,8 @@ static int receive_lvb(struct dlm_ls *ls, struct dlm_lkb *lkb,
if (!lkb->lkb_lvbptr)
return -ENOMEM;
len = receive_extralen(ms);
+ if (len > DLM_RESNAME_MAXLEN)
+ len = DLM_RESNAME_MAXLEN;
memcpy(lkb->lkb_lvbptr, ms->m_extra, len);
}
return 0;
--
1.5.3.3
reply other threads:[~2008-02-07 6:23 UTC|newest]
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