From: Anna Schumaker <Anna.Schumaker@netapp.com>
To: <Trond.Myklebust@primarydata.com>, <linux-nfs@vger.kernel.org>
Cc: <Anna.Schumaker@netapp.com>, <Olga.Kornievskaia@netapp.com>
Subject: [PATCH] NFS: Fix a tracepoint NULL-pointer dereference
Date: Mon, 5 Oct 2015 16:43:26 -0400 [thread overview]
Message-ID: <1444077806-29155-1-git-send-email-Anna.Schumaker@Netapp.com> (raw)
Running xfstest generic/013 with the tracepoint nfs:nfs4_open_file
enabled produces a NULL-pointer dereference when calculating fileid and
filehandle of the opened file. Fix this by checking if state is NULL
before trying to use the inode pointer.
Reported-by: Olga Kornievskaia <aglo@umich.edu>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---
fs/nfs/nfs4trace.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 28df12e..671cf68 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -409,7 +409,7 @@ DECLARE_EVENT_CLASS(nfs4_open_event,
__entry->flags = flags;
__entry->fmode = (__force unsigned int)ctx->mode;
__entry->dev = ctx->dentry->d_sb->s_dev;
- if (!IS_ERR(state))
+ if (!IS_ERR_OR_NULL(state))
inode = state->inode;
if (inode != NULL) {
__entry->fileid = NFS_FILEID(inode);
--
2.6.0
reply other threads:[~2015-10-05 20:43 UTC|newest]
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