From: Florian Fainelli Date: Wed, 6 May 2009 21:27:28 +0000 (+0000) Subject: [kernel] use force_sig when handling address errors X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=2ceb5da462330939d07975c1bba6a147c7ea795a;p=openwrt%2Fsvn-archive%2Farchive.git [kernel] use force_sig when handling address errors SVN-Revision: 15642 --- diff --git a/target/linux/generic-2.6/patches-2.6.29/022-mips_force_sig_address_errors.patch b/target/linux/generic-2.6/patches-2.6.29/022-mips_force_sig_address_errors.patch new file mode 100644 index 0000000000..87e7159a03 --- /dev/null +++ b/target/linux/generic-2.6/patches-2.6.29/022-mips_force_sig_address_errors.patch @@ -0,0 +1,45 @@ +When init is started it is SIGNAL_UNKILLABLE. If it were to get an +address error, we would try to send it SIGBUS, but it would be ignored +and the faulting instruction restarted. This results in an endless +loop. + +We need to use force_sig() instead so it will actually die and give us +some useful information. + +Reported-by: Florian Fainelli + +Signed-off-by: David Daney +--- + arch/mips/kernel/unaligned.c | 6 +++--- + 1 files changed, 3 insertions(+), 3 deletions(-) + +diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c +index bf4c4a9..67bd626 100644 +--- a/arch/mips/kernel/unaligned.c ++++ b/arch/mips/kernel/unaligned.c +@@ -482,19 +482,19 @@ fault: + return; + + die_if_kernel("Unhandled kernel unaligned access", regs); +- send_sig(SIGSEGV, current, 1); ++ force_sig(SIGSEGV, current); + + return; + + sigbus: + die_if_kernel("Unhandled kernel unaligned access", regs); +- send_sig(SIGBUS, current, 1); ++ force_sig(SIGBUS, current); + + return; + + sigill: + die_if_kernel("Unhandled kernel unaligned access or invalid instruction", regs); +- send_sig(SIGILL, current, 1); ++ force_sig(SIGILL, current); + } + + asmlinkage void do_ade(struct pt_regs *regs) +-- +1.6.0.6 +