From e9f2a8c6428d097b619163d8aed35ee89b6f55cc Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Mon, 7 Mar 2022 19:32:55 -0800 Subject: [PATCH] kgdbts: fix return value of __setup handler [ Upstream commit 96c9e802c64014a7716865332d732cc9c7f24593 ] __setup() handlers should return 1 to indicate that the boot option has been handled. A return of 0 causes the boot option/value to be listed as an Unknown kernel parameter and added to init's (limited) environment strings. So return 1 from kgdbts_option_setup(). Unknown kernel command line parameters "BOOT_IMAGE=/boot/bzImage-517rc7 kgdboc=kbd kgdbts=", 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-517rc7 kgdboc=kbd kgdbts= Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru Fixes: e8d31c204e36 ("kgdb: add kgdb internal test suite") Cc: kgdb-bugreport@lists.sourceforge.net Cc: Jason Wessel Cc: Daniel Thompson Cc: Douglas Anderson Cc: Arnd Bergmann Cc: Greg Kroah-Hartman Reported-by: Igor Zhbanov Reviewed-by: Douglas Anderson Signed-off-by: Randy Dunlap Link: https://lore.kernel.org/r/20220308033255.22118-1-rdunlap@infradead.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/misc/kgdbts.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/misc/kgdbts.c b/drivers/misc/kgdbts.c index 8d18f19c99c4..2f8858105733 100644 --- a/drivers/misc/kgdbts.c +++ b/drivers/misc/kgdbts.c @@ -1060,10 +1060,10 @@ static int kgdbts_option_setup(char *opt) { if (strlen(opt) >= MAX_CONFIG_LEN) { printk(KERN_ERR "kgdbts: config string too long\n"); - return -ENOSPC; + return 1; } strcpy(config, opt); - return 0; + return 1; } __setup("kgdbts=", kgdbts_option_setup);