From: Paul Burton Date: Tue, 22 Sep 2015 17:26:39 +0000 (-0700) Subject: MIPS: Avoid buffer overrun in mips_cm_error_report X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f88e632480baf223cad67ac553a6729535db6d74;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git MIPS: Avoid buffer overrun in mips_cm_error_report Commit 3885c2b463f6 ("MIPS: CM: Add support for reporting CM cache errors") added cases for decoding errors reported by CM3, but leaves the buf variable which is printed as a string uninitialised for cause values other than 1, 2 or 3. Fix by ensuring the buf variable is initialised to an empty string in such cases. Signed-off-by: Paul Burton Cc: linux-mips@linux-mips.org Cc: Markos Chandras Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/11187/ Signed-off-by: Ralf Baechle --- diff --git a/arch/mips/kernel/mips-cm.c b/arch/mips/kernel/mips-cm.c index 10524ce769ae..88a8e21a51dd 100644 --- a/arch/mips/kernel/mips-cm.c +++ b/arch/mips/kernel/mips-cm.c @@ -366,6 +366,8 @@ void mips_cm_error_report(void) cm3_cmd_group[cmd_group_bits], cm3_cca_bits, 1 << mcp_bits, cm3_tr[cm3_tr_bits], sched_bit); + } else { + buf[0] = 0; } pr_err("CM_ERROR=%llx %s <%s>\n", cm_error,