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authorMatthew Wilcox <willy@linux.intel.com>2016-02-02 16:57:55 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-02-03 08:28:43 -0800
commitc6400ba7e13a41539342f1b6e1f9e78419cb0148 (patch)
tree4ac7cac19e5d9cfc275a7d99f11ea21026f20275 /drivers/rpmsg
parent46437f9a554fbe3e110580ca08ab703b59f2f95a (diff)
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drivers/hwspinlock: fix race between radix tree insertion and lookup
of_hwspin_lock_get_id() is protected by the RCU lock, which means that insertions can occur simultaneously with the lookup. If the radix tree transitions from a height of 0, we can see a slot with the indirect_ptr bit set, which will cause us to at least read random memory, and could cause other havoc. Fix this by using the newly introduced radix_tree_iter_retry(). Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ohad Ben-Cohen <ohad@wizery.com> Cc: Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rpmsg')
0 files changed, 0 insertions, 0 deletions
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