This is a note to let you know that I've just added the patch titled printk: Fix rq->lock vs logbuf_lock unlock lock inversion to the 3.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: printk-fix-rq-lock-vs-logbuf_lock-unlock-lock-inversion.patch and it can be found in the queue-3.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From dbda92d16f8655044e082930e4e9d244b87fde77 Mon Sep 17 00:00:00 2001 From: "Bu, Yitian" <ybu@xxxxxxxxxxxxxxxx> Date: Mon, 18 Feb 2013 12:53:37 +0000 Subject: printk: Fix rq->lock vs logbuf_lock unlock lock inversion From: "Bu, Yitian" <ybu@xxxxxxxxxxxxxxxx> commit dbda92d16f8655044e082930e4e9d244b87fde77 upstream. commit 07354eb1a74d1 ("locking printk: Annotate logbuf_lock as raw") reintroduced a lock inversion problem which was fixed in commit 0b5e1c5255 ("printk: Release console_sem after logbuf_lock"). This happened probably when fixing up patch rejects. Restore the ordering and unlock logbuf_lock before releasing console_sem. Signed-off-by: ybu <ybu@xxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Link: http://lkml.kernel.org/r/E807E903FE6CBE4D95E420FBFCC273B827413C@xxxxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- kernel/printk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/printk.c +++ b/kernel/printk.c @@ -1369,9 +1369,9 @@ static int console_trylock_for_printk(un } } logbuf_cpu = UINT_MAX; + raw_spin_unlock(&logbuf_lock); if (wake) up(&console_sem); - raw_spin_unlock(&logbuf_lock); return retval; } Patches currently in stable-queue which might be from ybu@xxxxxxxxxxxxxxxx are queue-3.10/printk-fix-rq-lock-vs-logbuf_lock-unlock-lock-inversion.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html