linux-kernel - Re: linux-next: Tree for Feb 8 (objtool: warnings: 5)

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Message-ID: <9fd03d53-8001-b76f-feea-179c13633a8b@infradead.org>
Date:   Mon, 8 Feb 2021 13:39:03 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: linux-next: Tree for Feb 8 (objtool: warnings: 5)

On 2/8/21 1:21 PM, Josh Poimboeuf wrote:
> On Mon, Feb 08, 2021 at 11:30:59AM -0800, Randy Dunlap wrote:
>> On 2/8/21 4:52 AM, Stephen Rothwell wrote:
>>> Hi all,
>>>
>>> Changes since 20210205:
>>>
>>
>> on x86_64:
>>
>> objtool warnings: (from 3 different randconfig builds)
>>
>> drivers/input/touchscreen/elants_i2c.o: warning: objtool: elants_i2c_initialize() falls through to next function elants_i2c_resume()
> 
> Randy, can you share the .o?  (you may need to gzip it, still waiting on
> corporate IT to allow me to receive .o files)

Sure, no problem. It's attached.

>> fs/select.o: warning: objtool: do_sys_poll()+0x8e9: call to __ubsan_handle_sub_overflow() with UACCESS enabled
>> lib/iov_iter.o: warning: objtool: iovec_from_user.part.12()+0x2db: call to __ubsan_handle_add_overflow() with UACCESS enabled
> 
> Peter, we need the patch to prevent UBSAN with gcc7?
> 
>> vmlinux.o: warning: objtool: do_machine_check()+0x7ee: call to queue_task_work() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: lock_is_held_type()+0x107: call to warn_bogus_irq_restore() leaves .noinstr.text section
> 
> Peter?


thanks.
-- 
~Randy


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