linux-kernel - [PATCH 4.4 049/138] jbd2: make journal y2038 safe

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Message-Id: <20160818135600.263764514@linuxfoundation.org>
Date:	Thu, 18 Aug 2016 15:57:39 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Theodore Tso <tytso@....edu>, Jan Kara <jack@...e.cz>
Subject: [PATCH 4.4 049/138] jbd2: make journal y2038 safe

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann <arnd@...db.de>

commit abcfb5d979892fc8b12574551fc907c05fe1b11b upstream.

The jbd2 journal stores the commit time in 64-bit seconds and 32-bit
nanoseconds, which avoids an overflow in 2038, but it gets the numbers
from current_kernel_time(), which uses 'long' seconds on 32-bit
architectures.

This simply changes the code to call current_kernel_time64() so
we use 64-bit seconds consistently.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Theodore Ts'o <tytso@....edu>
Reviewed-by: Jan Kara <jack@...e.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/jbd2/commit.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -124,7 +124,7 @@ static int journal_submit_commit_record(
 	struct commit_header *tmp;
 	struct buffer_head *bh;
 	int ret;
-	struct timespec now = current_kernel_time();
+	struct timespec64 now = current_kernel_time64();
 
 	*cbh = NULL;