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    Subject[PATCH 4.14 011/157] signal/xtensa: Consistenly use SIGBUS in do_unaligned_user
    Date
    4.14-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Eric W. Biederman <ebiederm@xmission.com>

    commit 7de712ccc096b81d23cc0a941cd9b8cb3956605d upstream.

    While working on changing this code to use force_sig_fault I
    discovered that do_unaliged_user is sets si_signo to SIGBUS and passes
    SIGSEGV to force_sig_info. Which is just b0rked.

    The code is reporting a SIGBUS error so replace the SIGSEGV with SIGBUS.

    Cc: Chris Zankel <chris@zankel.net>
    Cc: Max Filippov <jcmvbkbc@gmail.com>
    Cc: linux-xtensa@linux-xtensa.org
    Cc: stable@vger.kernel.org
    Acked-by: Max Filippov <jcmvbkbc@gmail.com>
    Fixes: 5a0015d62668 ("[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 3")
    Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/xtensa/kernel/traps.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/arch/xtensa/kernel/traps.c
    +++ b/arch/xtensa/kernel/traps.c
    @@ -336,7 +336,7 @@ do_unaligned_user (struct pt_regs *regs)
    info.si_errno = 0;
    info.si_code = BUS_ADRALN;
    info.si_addr = (void *) regs->excvaddr;
    - force_sig_info(SIGSEGV, &info, current);
    + force_sig_info(SIGBUS, &info, current);

    }
    #endif

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