This buffer overflow was introduced with 91e0c5f3dad47838cb2ecc1865ce789a0b7182b1 (2.6.24).
Cc: Konrad Rzeszutek Wilk <[email protected]> Cc: Jeremy Fitzhardinge <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Signed-off-by: Tim Gardner <[email protected]> --- This patch applies cleanly to 3.1.10 and newer. Requires a backport for 2.6.24-3.2.y arch/x86/xen/multicalls.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/xen/multicalls.c b/arch/x86/xen/multicalls.c index 0d82003..5270407 100644 --- a/arch/x86/xen/multicalls.c +++ b/arch/x86/xen/multicalls.c @@ -195,9 +195,10 @@ void xen_mc_callback(void (*fn)(void *), void *data) struct mc_buffer *b = &__get_cpu_var(mc_buffer); struct callback *cb; - if (b->cbidx == MC_BATCH) { + if (b->cbidx >= MC_BATCH) { trace_xen_mc_flush_reason(XEN_MC_FL_CALLBACK); xen_mc_flush(); + return; } trace_xen_mc_callback(fn, data); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
