This is a note to let you know that I've just added the patch titled driver core: dd: fix return value of __setup handler to the 5.15-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: driver-core-dd-fix-return-value-of-__setup-handler.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 9f1fb57b0613b630413ee22b4a5f1bf0e67bb692 Author: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Date: Mon Feb 28 20:18:29 2022 -0800 driver core: dd: fix return value of __setup handler [ Upstream commit f2aad54703dbe630f9d8b235eb58e8c8cc78f37d ] When "driver_async_probe=nulltty" is used on the kernel boot command line, it causes an Unknown parameter message and the string is added to init's environment strings, polluting them. Unknown kernel command line parameters "BOOT_IMAGE=/boot/bzImage-517rc6 driver_async_probe=nulltty", will be passed to user space. Run /sbin/init as init process with arguments: /sbin/init with environment: HOME=/ TERM=linux BOOT_IMAGE=/boot/bzImage-517rc6 driver_async_probe=nulltty Change the return value of the __setup function to 1 to indicate that the __setup option has been handled. Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@xxxxxxxxxxxx Fixes: 1ea61b68d0f8 ("async: Add cmdline option to specify drivers to be async probed") Cc: Feng Tang <feng.tang@xxxxxxxxx> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx> Reported-by: Igor Zhbanov <i.zhbanov@xxxxxxxxxxxx> Reviewed-by: Feng Tang <feng.tang@xxxxxxxxx> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20220301041829.15137-1-rdunlap@xxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 6b6630693201..64ce42b6c6b6 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -809,7 +809,7 @@ static int __init save_async_options(char *buf) pr_warn("Too long list of driver names for 'driver_async_probe'!\n"); strlcpy(async_probe_drv_names, buf, ASYNC_DRV_NAMES_MAX_LEN); - return 0; + return 1; } __setup("driver_async_probe=", save_async_options);