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openSUSE:12.2:ARM
xen
24358-kexec-compat-overflow.patch
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File 24358-kexec-compat-overflow.patch of Package xen
# HG changeset patch # User Andrew Cooper <andrew.cooper3@citrix.com> # Date 1323114166 0 # Node ID 9961a6d5356a57685b06f65133c6ade5041e3356 # Parent 832fa3f3543298a7125cd5f996d1e28dd7ba47b1 KEXEC: fix kexec_get_range_compat to fail vocally. Fail with -ERANGE rather than silently truncating 64bit values (a physical address and size) into 32bit integers for dom0 to consume. Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Simplify the bitwise arithmetic a bit. Signed-off-by: Keir Fraser <keir@xen.org> --- a/xen/common/kexec.c +++ b/xen/common/kexec.c @@ -395,6 +395,10 @@ static int kexec_get_range_compat(XEN_GU ret = kexec_get_range_internal(&range); + /* Dont silently truncate physical addresses or sizes. */ + if ( (range.start | range.size) & ~(unsigned long)(~0u) ) + return -ERANGE; + if ( ret == 0 ) { XLAT_kexec_range(&compat_range, &range); if ( unlikely(copy_to_guest(uarg, &compat_range, 1)) )
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