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| author | Brian Behlendorf <behlendorf1@llnl.gov> | 2013-05-25 02:55:28 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-07 23:49:26 +0400 |
| commit | 60e255daee832c39d2099d8f942cbb901d9cb36f (patch) | |
| tree | dbef26e86df30a147320f2fa3da944d68c304bc4 /mm/pagewalk.c | |
| parent | bfd7610d981cd0fab6d68576c638c8e7550f3e51 (diff) | |
| download | linux-60e255daee832c39d2099d8f942cbb901d9cb36f.tar.xz | |
drivers/block/brd.c: fix brd_lookup_page() race
commit dfd20b2b174d3a9b258ea3b7a35ead33576587b1 upstream.
The index on the page must be set before it is inserted in the radix
tree. Otherwise there is a small race which can occur during lookup
where the page can be found with the incorrect index. This will trigger
the BUG_ON() in brd_lookup_page().
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reported-by: Chris Wedgwood <cw@f00f.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/pagewalk.c')
0 files changed, 0 insertions, 0 deletions