Commit 3ca676e4 authored by Douglas Anderson's avatar Douglas Anderson Committed by Daniel Thompson

kgdb: Prevent infinite recursive entries to the debugger

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: default avatarDouglas Anderson <dianders@chromium.org>
Reviewed-by: default avatarDaniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20200507130644.v4.6.I89de39f68736c9de610e6f241e68d8dbc44bc266@changeidSigned-off-by: default avatarDaniel Thompson <daniel.thompson@linaro.org>
parent b1a57bbf
...@@ -530,6 +530,7 @@ static int kgdb_reenter_check(struct kgdb_state *ks) ...@@ -530,6 +530,7 @@ static int kgdb_reenter_check(struct kgdb_state *ks)
if (exception_level > 1) { if (exception_level > 1) {
dump_stack(); dump_stack();
kgdb_io_module_registered = false;
panic("Recursive entry to debugger"); panic("Recursive entry to debugger");
} }
......
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