Messages in this thread | | | Date | Wed, 2 Dec 2015 21:32:34 +0300 | Subject | Re: 4.4rc3 nfsd/btrfs kasan warning. | From | Andrey Ryabinin <> |
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2015-12-02 20:14 GMT+03:00 Chris Mason <clm@fb.com>: > On Wed, Dec 02, 2015 at 11:09:43AM -0500, Dave Jones wrote: >> On Wed, Dec 02, 2015 at 10:11:28AM -0500, Josef Bacik wrote: >> > On 12/02/2015 09:59 AM, Dave Jones wrote: >> > > Got a few of these in the logs this morning after an overnight rsync over nfs >> > > to an exported btrfs volume. >> > >> > That's probably us and not NFS, what line is that in >> > setup_cluster_bitmap? Thanks, >> >> If my math is correct, it's this.. >> >> if (entry->offset != bitmap_offset) >> >> I don't seem to be able to trigger it on demand unfortunatly. > > Is it possible we're blowing the stack? It seems pretty tricky to get a > stack out of bounds out of this code without flat out blowing through > it. >
I think it just empty bitmaps list. list_first_entry() can't be used on empty list.
BTW, there is similar report http://lkml.kernel.org/r/<trinity-c7a088d8-bb35-484e-bf27-dbd9a94a804c-1448959367092@3capp-webde-bs56>
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