Messages in this thread Patch in this message | | | From | Kamal Mostafa <> | Subject | [PATCH 1/2] x86: fix panic when handling "mem={invalid}" param | Date | Thu, 3 Feb 2011 17:38:04 -0800 |
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Avoid removing all of memory and panicing when "mem={invalid}" is specified, e.g. mem=blahblah, mem=0, or mem=nopentium (on platforms other than x86_32).
BugLink: http://bugs.launchpad.net/bugs/553464 Signed-off-by: Kamal Mostafa <kamal@canonical.com> Cc: <stable@kernel.org> --- arch/x86/kernel/e820.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index 294f26d..55a59d8 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -856,6 +856,9 @@ static int __init parse_memopt(char *p) userdef = 1; mem_size = memparse(p, &p); + /* don't remove all of memory when handling "mem={invalid}" param */ + if (mem_size == 0) + return -EINVAL; e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1); return 0; -- 1.7.1
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