| From 5ee39a71fd89ab7240c5339d04161c44a8e03269 Mon Sep 17 00:00:00 2001 |
| From: Michael Weiser <michael.weiser@gmx.de> |
| Date: Thu, 1 Feb 2018 23:13:38 +0100 |
| Subject: arm64: Disable unhandled signal log messages by default |
| |
| From: Michael Weiser <michael.weiser@gmx.de> |
| |
| commit 5ee39a71fd89ab7240c5339d04161c44a8e03269 upstream. |
| |
| aarch64 unhandled signal kernel messages are very verbose, suggesting |
| them to be more of a debugging aid: |
| |
| sigsegv[33]: unhandled level 2 translation fault (11) at 0x00000000, esr |
| 0x92000046, in sigsegv[400000+71000] |
| CPU: 1 PID: 33 Comm: sigsegv Tainted: G W 4.15.0-rc3+ #3 |
| Hardware name: linux,dummy-virt (DT) |
| pstate: 60000000 (nZCv daif -PAN -UAO) |
| pc : 0x4003f4 |
| lr : 0x4006bc |
| sp : 0000fffffe94a060 |
| x29: 0000fffffe94a070 x28: 0000000000000000 |
| x27: 0000000000000000 x26: 0000000000000000 |
| x25: 0000000000000000 x24: 00000000004001b0 |
| x23: 0000000000486ac8 x22: 00000000004001c8 |
| x21: 0000000000000000 x20: 0000000000400be8 |
| x19: 0000000000400b30 x18: 0000000000484728 |
| x17: 000000000865ffc8 x16: 000000000000270f |
| x15: 00000000000000b0 x14: 0000000000000002 |
| x13: 0000000000000001 x12: 0000000000000000 |
| x11: 0000000000000000 x10: 0008000020008008 |
| x9 : 000000000000000f x8 : ffffffffffffffff |
| x7 : 0004000000000000 x6 : ffffffffffffffff |
| x5 : 0000000000000000 x4 : 0000000000000000 |
| x3 : 00000000004003e4 x2 : 0000fffffe94a1e8 |
| x1 : 000000000000000a x0 : 0000000000000000 |
| |
| Disable them by default, so they can be enabled using |
| /proc/sys/debug/exception-trace. |
| |
| Cc: <stable@vger.kernel.org> |
| Signed-off-by: Michael Weiser <michael.weiser@gmx.de> |
| Signed-off-by: Will Deacon <will.deacon@arm.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| arch/arm64/kernel/traps.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/arch/arm64/kernel/traps.c |
| +++ b/arch/arm64/kernel/traps.c |
| @@ -50,7 +50,7 @@ static const char *handler[]= { |
| "Error" |
| }; |
| |
| -int show_unhandled_signals = 1; |
| +int show_unhandled_signals = 0; |
| |
| /* |
| * Dump out the contents of some kernel memory nicely... |
