On Mon, Nov 16, 2015 at 4:44 PM, Konstantin Khlebnikov <[email protected]> wrote: > This patch fixes kernel crash at removing directory which contains > whiteouts from lower layers. > > Cache of directory content passed as "list" contains entries from all > layers, including whiteouts from lower layers. So, lookup in upper dir > (moved into work at this stage) will return negative entry. Plus this > cache is filled long before and we can race with external removal. > > Example: > mkdir -p lower0/dir lower1/dir upper work overlay > touch lower0/dir/a lower0/dir/b > mknod lower1/dir/a c 0 0 > mount -t overlay none overlay -o > lowerdir=lower1:lower0,upperdir=upper,workdir=work > rm -fr overlay/dir > > Signed-off-by: Konstantin Khlebnikov <[email protected]> > Cc: Stable <[email protected]> # 3.18+
Thanks, applied. Miklos -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
