btrfs: convert btrfs_bio.refs from atomic_t to refcount_t

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refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Elena Reshetova 2017-03-03 10:55:10 +02:00 • committed by David Sterba

parent f95fda8751

commit 140475ae4a

2 changed files with 5 additions and 5 deletions

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8

fs/btrfs/volumes.c

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2

fs/btrfs/volumes.h

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