From 39d0d3bdf7bab3021a31e501172ac0f18947f9b3 Mon Sep 17 00:00:00 2001 From: Anna Schumaker Date: Mon, 5 Oct 2015 16:43:26 -0400 Subject: [PATCH] NFS: Fix a tracepoint NULL-pointer dereference 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 Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust --- 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 28df12e525ba..671cf68fe56b 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); -- 2.20.1