Messages in this thread Patch in this message | | | From | Douglas Anderson <> | Subject | [PATCH v4 06/12] kgdb: Prevent infinite recursive entries to the debugger | Date | Thu, 7 May 2020 13:08:44 -0700 |
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If we detect that we recursively entered the debugger we should hack our I/O ops to NULL so that the panic() in the next line won't actually cause another recursion into the debugger. The first line of kgdb_panic() will check this and return.
Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> ---
Changes in v4: None Changes in v3: - ("kgdb: Prevent infinite recursive entries to the debugger") new for v3.
Changes in v2: None
kernel/debug/debug_core.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c index 503c1630ca76..faf5bd4c34ee 100644 --- a/kernel/debug/debug_core.c +++ b/kernel/debug/debug_core.c @@ -532,6 +532,7 @@ static int kgdb_reenter_check(struct kgdb_state *ks) if (exception_level > 1) { dump_stack(); + kgdb_io_module_registered = false; panic("Recursive entry to debugger"); } -- 2.26.2.645.ge9eca65c58-goog
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