init: carefully handle loglevel option on kernel cmdline.
authorAlexander Sverdlin <alexander.sverdlin@sysgo.com>
Wed, 21 Sep 2011 07:51:40 +0000 (09:51 +0200)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 21 Sep 2011 20:18:52 +0000 (13:18 -0700)
commit808bf29b9195c52239b9aaeda7c6082a0ddf07c6
treeeabb672d84cf00b13225b44fdf2482b6900b5a14
parent32ef43848f283e0ef945d3c67e851c143fea3970
init: carefully handle loglevel option on kernel cmdline.

When a malformed loglevel value (for example "${abc}") is passed on the
kernel cmdline, the loglevel itself is being set to 0.

That then suppresses all following messages, including all the errors
and crashes caused by other malformed cmdline options.  This could make
debugging process quite tricky.

This patch leaves the previous value of loglevel if the new value is
incorrect and reports an error code in this case.

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@sysgo.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
init/main.c