From: "Holger Hoffstätte" <holger.hoffstaette@googlemail.com>
To: Chris Bainbridge <chris.bainbridge@gmail.com>,
linux-kernel@vger.kernel.org
Cc: aryabinin@virtuozzo.com, clm@fb.com, jbacik@fb.com,
dsterba@suse.com, linux-btrfs@vger.kernel.org
Subject: Re: UBSAN: Undefined behaviour in fs/btrfs/inode.c:5845:10
Date: Tue, 26 Jan 2016 12:03:33 +0100 [thread overview]
Message-ID: <56A75285.3010502@googlemail.com> (raw)
In-Reply-To: <20160126101333.GC5054@localhost>
On 01/26/16 11:13, Chris Bainbridge wrote:
> Booting 4.5.0-rc1 with new UBSAN checker enabled:
>
> [ 3.859690] ================================================================================
> [ 3.859694] UBSAN: Undefined behaviour in fs/btrfs/inode.c:5845:10
> [ 3.859696] signed integer overflow:
> [ 3.859697] 9223372036854775807 + 1 cannot be represented in type 'long long int'
> [ 3.859701] CPU: 3 PID: 3237 Comm: polkitd Not tainted 4.5.0-rc1 #252
> [ 3.859702] Hardware name: Apple Inc. MacBookPro10,2/Mac-AFD8A9D944EA4843, BIOS MBP102.88Z.0106.B0A.1509130955 09/13/2015
> [ 3.859706] 0000000000000000 0000000000000000 0000000000000001 ffff88024d4bfcf8
> [ 3.859709] ffffffff81b2e7d9 0000000000000001 ffff88024d4bfd28 ffff88024d4bfd10
> [ 3.859711] ffffffff81bcb87d ffffffff83aceb48 ffff88024d4bfd98 ffffffff81bcbc4d
> [ 3.859712] Call Trace:
> [ 3.859719] [<ffffffff81b2e7d9>] dump_stack+0x45/0x6c
> [ 3.859723] [<ffffffff81bcb87d>] ubsan_epilogue+0xd/0x40
> [ 3.859725] [<ffffffff81bcbc4d>] handle_overflow+0xbd/0xe0
> [ 3.859728] [<ffffffff81bcbc7e>] __ubsan_handle_add_overflow+0xe/0x10
> [ 3.859732] [<ffffffff818c6271>] btrfs_real_readdir+0x881/0xc10
> [ 3.859737] [<ffffffff8148b05d>] iterate_dir+0xdd/0x2d0
> [ 3.859740] [<ffffffff8148bb0b>] SyS_getdents+0x9b/0x110
> [ 3.859743] [<ffffffff8148b250>] ? iterate_dir+0x2d0/0x2d0
> [ 3.859747] [<ffffffff82b40a57>] entry_SYSCALL_64_fastpath+0x12/0x6a
> [ 3.859749] ================================================================================
https://patchwork.kernel.org/patch/7611351/
-h
next prev parent reply other threads:[~2016-01-26 11:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-26 10:13 UBSAN: Undefined behaviour in fs/btrfs/inode.c:5845:10 Chris Bainbridge
2016-01-26 11:03 ` Holger Hoffstätte [this message]
2016-01-26 11:03 ` David Sterba
2016-01-26 11:29 ` Chris Bainbridge
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=56A75285.3010502@googlemail.com \
--to=holger.hoffstaette@googlemail.com \
--cc=aryabinin@virtuozzo.com \
--cc=chris.bainbridge@gmail.com \
--cc=clm@fb.com \
--cc=dsterba@suse.com \
--cc=jbacik@fb.com \
--cc=linux-btrfs@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).