• J
    x86/unwinder: Handle stack overflows more gracefully · b02fcf9b
    Josh Poimboeuf 提交于
    There are at least two unwinder bugs hindering the debugging of
    stack-overflow crashes:
    
    - It doesn't deal gracefully with the case where the stack overflows and
      the stack pointer itself isn't on a valid stack but the
      to-be-dereferenced data *is*.
    
    - The ORC oops dump code doesn't know how to print partial pt_regs, for the
      case where if we get an interrupt/exception in *early* entry code
      before the full pt_regs have been saved.
    
    Fix both issues.
    
    http://lkml.kernel.org/r/20171126024031.uxi4numpbjm5rlbr@trebleSigned-off-by: NJosh Poimboeuf <jpoimboe@redhat.com>
    Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
    Reviewed-by: NBorislav Petkov <bpetkov@suse.de>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
    Cc: Borislav Petkov <bp@alien8.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: 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/20171204150605.071425003@linutronix.deSigned-off-by: NIngo Molnar <mingo@kernel.org>
    b02fcf9b
unwind.h 2.9 KB