diff options
| author | Eric Dumazet <[email protected]> | 2014-10-10 04:48:18 -0700 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2014-10-10 15:37:29 -0400 |
| commit | 4c450583d9d0a8241f0f62b80038ac47b43ff843 (patch) | |
| tree | 85ca97083049de5acf67f1a1b467b1db209e7cdc /lib/test-string_helpers.c | |
| parent | 98226208c8a1fe5834e92d827a2a1e8051a17943 (diff) | |
net: fix races in page->_count manipulation
This is illegal to use atomic_set(&page->_count, ...) even if we 'own'
the page. Other entities in the kernel need to use get_page_unless_zero()
to get a reference to the page before testing page properties, so we could
loose a refcount increment.
The only case it is valid is when page->_count is 0
Fixes: 540eb7bf0bbed ("net: Update alloc frag to reduce get/put page usage and recycle pages")
Signed-off-by: Eric Dumaze <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'lib/test-string_helpers.c')
0 files changed, 0 insertions, 0 deletions