4.14-stable review patch. If anyone has any objections, please let me know.
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From: Rich Felker dalias@libc.org
[ Upstream commit 96a598996f6ac518ac79839ecbb17c91af91f4f7 ]
When responding to a debug trap (breakpoint) in userspace, the kernel's trap handler raised SIGTRAP but returned from the trap via a code path that ignored pending signals, resulting in an infinite loop re-executing the trapping instruction.
Signed-off-by: Rich Felker dalias@libc.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/sh/kernel/entry-common.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/sh/kernel/entry-common.S +++ b/arch/sh/kernel/entry-common.S @@ -255,7 +255,7 @@ debug_trap: mov.l @r8, r8 jsr @r8 nop - bra __restore_all + bra ret_from_exception nop CFI_ENDPROC