Messages in this thread Patch in this message | | | Date | Mon, 21 Mar 2011 16:09:48 -0700 | From | Greg KH <> | Subject | [08/44] x86: Fix panic when handling "mem={invalid}" param |
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2.6.32-longterm review patch. If anyone has any objections, please let us know.
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From: Kamal Mostafa <kamal@canonical.com>
commit 77eed821accf5dd962b1f13bed0680e217e49112 upstream.
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).
Signed-off-by: Kamal Mostafa <kamal@canonical.com> BugLink: http://bugs.launchpad.net/bugs/553464 Cc: Yinghai Lu <yinghai@kernel.org> Cc: Len Brown <len.brown@intel.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> LKML-Reference: <1296783486-23033-1-git-send-email-kamal@canonical.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- arch/x86/kernel/e820.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -1245,6 +1245,9 @@ 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;
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