Matthew Wilcox 077b6173a8 drivers/hwspinlock: fix race between radix tree insertion and lookup ... commit c6400ba7e1 upstream. 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> 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>		2016-02-25 12:01:23 -08:00
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Kconfig	hwspinlock: add a CSR atlas7 driver	2015-06-12 10:44:06 +03:00
Makefile	hwspinlock: add a CSR atlas7 driver	2015-06-12 10:44:06 +03:00
hwspinlock_core.c	drivers/hwspinlock: fix race between radix tree insertion and lookup	2016-02-25 12:01:23 -08:00
hwspinlock_internal.h	hwspinlock/core: register a bank of hwspinlocks in a single API call	2011-09-21 19:45:34 +03:00
omap_hwspinlock.c	hwspinlock/omap: add support for dt nodes	2015-05-02 10:05:10 +03:00
qcom_hwspinlock.c	hwspinlock: qcom: Correct msb in regmap_field	2015-07-01 16:15:05 +03:00
sirf_hwspinlock.c	hwspinlock: add a CSR atlas7 driver	2015-06-12 10:44:06 +03:00
u8500_hsem.c	hwspinlock: drop owner assignment from platform_drivers	2014-10-20 16:20:37 +02:00