diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2015-11-19 13:29:28 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-11-19 13:47:10 -0800 |
| commit | 2e6edc95382cc36423aff18a237173ad62d5ab52 (patch) | |
| tree | 9f84c800ae12028682eeb720cfc2713bd704e4bc /usr | |
| parent | 0df9d41ab5d43dc5b20abc8b22a6b6d098b03994 (diff) | |
| download | linux-2e6edc95382cc36423aff18a237173ad62d5ab52.tar.gz linux-2e6edc95382cc36423aff18a237173ad62d5ab52.tar.bz2 linux-2e6edc95382cc36423aff18a237173ad62d5ab52.zip | |
block: protect rw_page against device teardown
Fix use after free crashes like the following:
general protection fault: 0000 [#1] SMP
Call Trace:
[<ffffffffa0050216>] ? pmem_do_bvec.isra.12+0xa6/0xf0 [nd_pmem]
[<ffffffffa0050ba2>] pmem_rw_page+0x42/0x80 [nd_pmem]
[<ffffffff8128fd90>] bdev_read_page+0x50/0x60
[<ffffffff812972f0>] do_mpage_readpage+0x510/0x770
[<ffffffff8128fd20>] ? I_BDEV+0x20/0x20
[<ffffffff811d86dc>] ? lru_cache_add+0x1c/0x50
[<ffffffff81297657>] mpage_readpages+0x107/0x170
[<ffffffff8128fd20>] ? I_BDEV+0x20/0x20
[<ffffffff8128fd20>] ? I_BDEV+0x20/0x20
[<ffffffff8129058d>] blkdev_readpages+0x1d/0x20
[<ffffffff811d615f>] __do_page_cache_readahead+0x28f/0x310
[<ffffffff811d6039>] ? __do_page_cache_readahead+0x169/0x310
[<ffffffff811c5abd>] ? pagecache_get_page+0x2d/0x1d0
[<ffffffff811c76f6>] filemap_fault+0x396/0x530
[<ffffffff811f816e>] __do_fault+0x4e/0xf0
[<ffffffff811fce7d>] handle_mm_fault+0x11bd/0x1b50
Cc: <stable@vger.kernel.org>
Cc: Jens Axboe <axboe@fb.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Reported-by: kbuild test robot <lkp@intel.com>
Acked-by: Matthew Wilcox <willy@linux.intel.com>
[willy: symmetry fixups]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions