]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commitdiff
x86/irq/64: Print the offending IP in the stack overflow warning
authorAndy Lutomirski <luto@kernel.org>
Mon, 4 Dec 2017 14:07:11 +0000 (15:07 +0100)
committerIngo Molnar <mingo@kernel.org>
Sun, 17 Dec 2017 12:59:53 +0000 (13:59 +0100)
In case something goes wrong with unwind (not unlikely in case of
overflow), print the offending IP where we detected the overflow.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Laight <David.Laight@aculab.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Eduardo Valentin <eduval@amazon.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: aliguori@amazon.com
Cc: daniel.gruss@iaik.tugraz.at
Cc: hughd@google.com
Cc: keescook@google.com
Link: https://lkml.kernel.org/r/20171204150605.231677119@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/kernel/irq_64.c

index 020efbf5786b35d343a8632cd14ac4f800465d9b..d86e344f5b3debfed504b72a7c0f83f36fe16387 100644 (file)
@@ -57,10 +57,10 @@ static inline void stack_overflow_check(struct pt_regs *regs)
        if (regs->sp >= estack_top && regs->sp <= estack_bottom)
                return;
 
-       WARN_ONCE(1, "do_IRQ(): %s has overflown the kernel stack (cur:%Lx,sp:%lx,irq stk top-bottom:%Lx-%Lx,exception stk top-bottom:%Lx-%Lx)\n",
+       WARN_ONCE(1, "do_IRQ(): %s has overflown the kernel stack (cur:%Lx,sp:%lx,irq stk top-bottom:%Lx-%Lx,exception stk top-bottom:%Lx-%Lx,ip:%pF)\n",
                current->comm, curbase, regs->sp,
                irq_stack_top, irq_stack_bottom,
-               estack_top, estack_bottom);
+               estack_top, estack_bottom, (void *)regs->ip);
 
        if (sysctl_panic_on_stackoverflow)
                panic("low stack detected by irq handler - check messages\n");