From: Randy Dunlap rdunlap@infradead.org
[ 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 jason.wessel@windriver.com Cc: Daniel Thompson daniel.thompson@linaro.org Cc: Douglas Anderson dianders@chromium.org Cc: Arnd Bergmann arnd@arndb.de Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Reported-by: Igor Zhbanov i.zhbanov@omprussia.ru Reviewed-by: Douglas Anderson dianders@chromium.org Signed-off-by: Randy Dunlap rdunlap@infradead.org Link: https://lore.kernel.org/r/20220308033255.22118-1-rdunlap@infradead.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 67c5b452dd35..88b91ad8e541 100644 --- a/drivers/misc/kgdbts.c +++ b/drivers/misc/kgdbts.c @@ -1070,10 +1070,10 @@ 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);