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Date: Mon, 24 May 2010 16:15:32 -0700 From: Greg KH <gregkh@...e.de> To: linux-kernel@...r.kernel.org, stable@...nel.org Cc: stable-review@...nel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Alan Cox <alan@...ux.intel.com>, Arnd Bergmann <arnd@...db.de> Subject: [20/39] tty: Fix unbalanced BKL handling in error path 2.6.33-stable review patch. If anyone has any objections, please let us know. ------------------ From: Alan Cox <alan@...ux.intel.com> commit 77945febbe60a69e9dcab7f49d33a1aa1e436973 upstream. Arnd noted: After the "retry_open:" label, we first get the tty_mutex and then the BKL. However a the end of tty_open, we jump back to retry_open with the BKL still held. If we run into this case, the tty_open function will be left with the BKL still held. Signed-off-by: Alan Cox <alan@...ux.intel.com> Acked-by: Arnd Bergmann <arnd@...db.de> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- drivers/char/tty_io.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -1875,6 +1875,7 @@ got_driver: */ if (filp->f_op == &hung_up_tty_fops) filp->f_op = &tty_fops; + unlock_kernel(); goto retry_open; } unlock_kernel(); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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