diff options
| author | Kamal Mostafa <kamal@canonical.com> | 2011-02-04 02:38:04 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-02-14 13:15:43 +0100 |
| commit | 77eed821accf5dd962b1f13bed0680e217e49112 (patch) | |
| tree | c5df18c70df04a4265b2998b42a9394a2d453d24 /arch/x86 | |
| parent | x86: Avoid tlbstate lock if not enough cpus (diff) | |
| download | linux-77eed821accf5dd962b1f13bed0680e217e49112.tar.xz linux-77eed821accf5dd962b1f13bed0680e217e49112.zip | |
x86: Fix panic when handling "mem={invalid}" param
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>
Cc: <stable@kernel.org> # .3x: as far back as it applies
LKML-Reference: <1296783486-23033-1-git-send-email-kamal@canonical.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | 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 294f26da0c0c..55a59d889dbd 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; |