Shreyas Joshi 27d1856973 printk: handle blank console arguments passed in. ... [ Upstream commit 48021f9813 ] If uboot passes a blank string to console_setup then it results in a trashed memory. Ultimately, the kernel crashes during freeing up the memory. This fix checks if there is a blank parameter being passed to console_setup from uboot. In case it detects that the console parameter is blank then it doesn't setup the serial device and it gracefully exits. Link: https://lore.kernel.org/r/20200522065306.83-1-shreyas.joshi@biamp.com Signed-off-by: Shreyas Joshi <shreyas.joshi@biamp.com> Acked-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> [pmladek@suse.com: Better format the commit message and code, remove unnecessary brackets.] Signed-off-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-10-01 13:12:45 +02:00
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braille.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
braille.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
console_cmdline.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
internal.h	printk/nmi: Prevent deadlock when accessing the main log buffer in NMI	2018-09-05 09:26:35 +02:00
Makefile	printk: introduce per-cpu safe_print seq buffer	2017-02-08 11:07:11 +01:00
printk.c	printk: handle blank console arguments passed in.	2020-10-01 13:12:45 +02:00
printk_safe.c	printk/tracing: Do not trace printk_nmi_enter()	2018-09-09 19:55:57 +02:00