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[ 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>