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crypto: algapi - convert cra_refcnt to refcount_t

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Reference counters should use refcount_t rather than atomic_t, since the
refcount_t implementation can prevent overflows, reducing the
exploitability of reference leak bugs.  crypto_alg.cra_refcount is a
reference counter with the usual semantics, so switch it over to
refcount_t.

Signed-off-by: Eric Biggers <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Eric Biggers 2017-12-29 10:00:46 -06:00 • committed by Herbert Xu
commit ce8614a312
6 changed files with 11 additions and 11 deletions
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2
crypto/proc.c
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@ -46,7 +46,7 @@ static int c_show(struct seq_file *m, void *p)
seq_printf(m, "driver : %s\n", alg->cra_driver_name);
seq_printf(m, "module : %s\n", module_name(alg->cra_module));
seq_printf(m, "priority : %d\n", alg->cra_priority);
seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
seq_printf(m, "refcnt : %u\n", refcount_read(&alg->cra_refcnt));
seq_printf(m, "selftest : %s\n",
(alg->cra_flags & CRYPTO_ALG_TESTED) ?
"passed" : "unknown");