From: Dan Carpenter <dan.carpenter@oracle.com> To: Christoph Lameter <cl@linux.com>, Kees Cook <keescook@chromium.org> Cc: Pekka Enberg <penberg@kernel.org>, David Rientjes <rientjes@google.com>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org, kernel-janitors@vger.kernel.org Subject: [PATCH] mm/slab: restore IRQs in kfree() Date: Thu, 13 Jun 2019 06:56:37 +0000 [thread overview] Message-ID: <20190613065637.GE16334@mwanda> (raw) We added a new return here but we need to restore the IRQs before we leave. Fixes: 4f5d94fd4ed5 ("mm/slab: sanity-check page type when looking up cache") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> --- mm/slab.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mm/slab.c b/mm/slab.c index 9e3eee5568b6..db01e9aae31b 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -3745,8 +3745,10 @@ void kfree(const void *objp) local_irq_save(flags); kfree_debugcheck(objp); c = virt_to_cache(objp); - if (!c) + if (!c) { + local_irq_restore(flags); return; + } debug_check_no_locks_freed(objp, c->object_size); debug_check_no_obj_freed(objp, c->object_size); -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com> To: Christoph Lameter <cl@linux.com>, Kees Cook <keescook@chromium.org> Cc: Pekka Enberg <penberg@kernel.org>, David Rientjes <rientjes@google.com>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org, kernel-janitors@vger.kernel.org Subject: [PATCH] mm/slab: restore IRQs in kfree() Date: Thu, 13 Jun 2019 09:56:37 +0300 [thread overview] Message-ID: <20190613065637.GE16334@mwanda> (raw) We added a new return here but we need to restore the IRQs before we leave. Fixes: 4f5d94fd4ed5 ("mm/slab: sanity-check page type when looking up cache") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> --- mm/slab.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mm/slab.c b/mm/slab.c index 9e3eee5568b6..db01e9aae31b 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -3745,8 +3745,10 @@ void kfree(const void *objp) local_irq_save(flags); kfree_debugcheck(objp); c = virt_to_cache(objp); - if (!c) + if (!c) { + local_irq_restore(flags); return; + } debug_check_no_locks_freed(objp, c->object_size); debug_check_no_obj_freed(objp, c->object_size); -- 2.20.1
next reply other threads:[~2019-06-13 6:56 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-06-13 6:56 Dan Carpenter [this message] 2019-06-13 6:56 ` [PATCH] mm/slab: restore IRQs in kfree() Dan Carpenter 2019-06-14 5:03 ` Kees Cook 2019-06-14 5:03 ` Kees Cook
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