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Josh Poimboeuf authored
The unwind_state 'error' field is used to inform the reliable unwinding code that the stack trace can't be trusted. Set this field for all errors in __unwind_start(). Also, move the zeroing out of the unwind_state struct to before the ORC table initialization check, to prevent the caller from reading uninitialized data if the ORC table is corrupted. Fixes: af085d90 ("stacktrace/x86: add function for detecting reliable stack traces") Fixes: d3a09104 ("x86/unwinder/orc: Dont bail on stack overflow") Fixes: 98d0c8eb ("x86/unwind/orc: Prevent unwinding before ORC initialization") Reported-by:
Pavel Machek <pavel@denx.de> Signed-off-by:
Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/d6ac7215a84ca92b895fdd2e1aa546729417e6e6.1589487277.git.jpoimboe@redhat.com
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