md/raid10: add rcu protection in raid10_status.

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mirrors[].rdev can become NULL at any point unless:
 - a counted reference is held
 - ->reconfig_mutex is held, or
 - rcu_read_lock() is held

raid10_status holds none of these.  So add rcu_read_lock()
protection.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>

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NeilBrown 2016-06-02 16:19:52 +10:00 • committed by Shaohua Li

parent 83f1261f5e

commit d44b0a928f

1 changed files with 6 additions and 4 deletions

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drivers/md/raid10.c

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