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panic: dump registers on panic_on_warn 

Currently we print stack and registers for ordinary warnings but we do not
for panic_on_warn which looks as oversight - panic() will reboot the
machine but won't print registers.

This moves printing of registers and modules earlier.

This does not move the stack dumping as panic() dumps it.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Rafael Aquini <aquini@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Link: https://lkml.kernel.org/r/20200804095054.68724-1-aik@ozlabs.ru
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Kardashevskiy 2020-10-15 20:13:22 -07:00 committed by Linus Torvalds
parent 85094c05ee
commit 3f388f2863
1 changed files with 6 additions and 6 deletions
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12
kernel/panic.c
View File

@ -589,6 +589,11 @@ void __warn(const char *file, int line, void *caller, unsigned taint,
if (args)
vprintk(args->fmt, args->args);
print_modules();
if (regs)
show_regs(regs);
if (panic_on_warn) {
/*
* This thread may hit another WARN() in the panic path.
@ -600,12 +605,7 @@ void __warn(const char *file, int line, void *caller, unsigned taint,
panic("panic_on_warn set ...\n");
}
print_modules();
if (regs)
show_regs(regs);
else
dump_stack();
dump_stack();
print_irqtrace_events(current);