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Message-Id: <1316206180-6375-7-git-send-email-sandeen@redhat.com> Date: Fri, 16 Sep 2011 15:49:21 -0500 From: Eric Sandeen <sandeen@...hat.com> To: linux-ext4@...r.kernel.org Cc: Eric Sandeen <sandeen@...hat.com> Subject: [PATCH 06/25] libext2fs: Potential null ptr deref in undo_err_handler_init In the !undo_io_backing_manager case, undo_err_handler_init will be passed a null data->real, which will be dereferenced. Signed-off-by: Eric Sandeen <sandeen@...hat.com> --- lib/ext2fs/undo_io.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/lib/ext2fs/undo_io.c b/lib/ext2fs/undo_io.c index 454f3b6..da1cf45 100644 --- a/lib/ext2fs/undo_io.c +++ b/lib/ext2fs/undo_io.c @@ -400,7 +400,8 @@ static errcode_t undo_open(const char *name, int flags, io_channel *channel) * setup err handler for read so that we know * when the backing manager fails do short read */ - undo_err_handler_init(data->real); + if (data->real) + undo_err_handler_init(data->real); *channel = io; return 0; -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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