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panic: Consolidate open-coded panic_on_warn checks

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commit 79cc1ba7badf9e7a12af99695a557e9ce27ee967 upstream.

Several run-time checkers (KASAN, UBSAN, KFENCE, KCSAN, sched) roll
their own warnings, and each check "panic_on_warn". Consolidate this
into a single function so that future instrumentation can be added in
a single location.

Cc: Marco Elver <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Juri Lelli <[email protected]>
Cc: Vincent Guittot <[email protected]>
Cc: Dietmar Eggemann <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Ben Segall <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Daniel Bristot de Oliveira <[email protected]>
Cc: Valentin Schneider <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Cc: Vincenzo Frascino <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: David Gow <[email protected]>
Cc: tangmeng <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Petr Mladek <[email protected]>
Cc: "Paul E. McKenney" <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: "Guilherme G. Piccoli" <[email protected]>
Cc: Tiezhu Yang <[email protected]>
Cc: [email protected]
Cc: [email protected]
Reviewed-by: Luis Chamberlain <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: Marco Elver <[email protected]>
Reviewed-by: Andrey Konovalov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Eric Biggers <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Kees Cook 2023-02-01 20:42:51 -08:00 • committed by Greg Kroah-Hartman
commit 51538bdde3
4 changed files with 11 additions and 6 deletions
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4
mm/kasan/report.c
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@ -92,8 +92,8 @@ static void end_report(unsigned long *flags)
pr_err("==================================================================\n");
add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
spin_unlock_irqrestore(&report_lock, *flags);
if (panic_on_warn && !test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags))
panic("panic_on_warn set ...\n");
if (!test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags))
check_panic_on_warn("KASAN");
kasan_enable_current();
}