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Fri, 20 Dec 2019 10:51:20 -0800 (PST) Date: Fri, 20 Dec 2019 19:49:38 +0100 In-Reply-To: <20191220184955.223741-1-glider@google.com> Message-Id: <20191220184955.223741-26-glider@google.com> Mime-Version: 1.0 References: <20191220184955.223741-1-glider@google.com> X-Mailer: git-send-email 2.24.1.735.g03f4e72817-goog Subject: [PATCH RFC v4 25/42] kmsan: handle task creation and exiting From: glider@google.com To: Andrew Morton , Greg Kroah-Hartman , Eric Dumazet , Wolfram Sang , Petr Mladek , Vegard Nossum , Dmitry Vyukov , Marco Elver , Andrey Konovalov , linux-mm@kvack.org Cc: glider@google.com, viro@zeniv.linux.org.uk, adilger.kernel@dilger.ca, aryabinin@virtuozzo.com, luto@kernel.org, ard.biesheuvel@linaro.org, arnd@arndb.de, hch@infradead.org, hch@lst.de, darrick.wong@oracle.com, davem@davemloft.net, dmitry.torokhov@gmail.com, ebiggers@google.com, ericvh@gmail.com, harry.wentland@amd.com, herbert@gondor.apana.org.au, iii@linux.ibm.com, mingo@elte.hu, jasowang@redhat.com, axboe@kernel.dk, m.szyprowski@samsung.com, mark.rutland@arm.com, martin.petersen@oracle.com, schwidefsky@de.ibm.com, willy@infradead.org, mst@redhat.com, mhocko@suse.com, monstr@monstr.eu, cai@lca.pw, rdunlap@infradead.org, robin.murphy@arm.com, sergey.senozhatsky@gmail.com, rostedt@goodmis.org, tiwai@suse.com, tytso@mit.edu, tglx@linutronix.de, gor@linux.ibm.com X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Tell KMSAN that a new task is created, so the tool creates a backing metadata structure for that task. Signed-off-by: Alexander Potapenko To: Alexander Potapenko Cc: Andrew Morton Cc: Greg Kroah-Hartman Cc: Eric Dumazet Cc: Wolfram Sang Cc: Petr Mladek Cc: Vegard Nossum Cc: Dmitry Vyukov Cc: Marco Elver Cc: Andrey Konovalov Cc: linux-mm@kvack.org --- This patch was previously called "kmsan: call KMSAN hooks where needed" v4: - split this patch away Change-Id: I7a6a83419b0e038f8993175461255f462a430205 --- kernel/exit.c | 2 ++ kernel/fork.c | 2 ++ kernel/kthread.c | 2 ++ 3 files changed, 6 insertions(+) diff --git a/kernel/exit.c b/kernel/exit.c index bcbd59888e67..9bdf732185c3 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -60,6 +60,7 @@ #include #include #include +#include #include #include #include @@ -719,6 +720,7 @@ void __noreturn do_exit(long code) profile_task_exit(tsk); kcov_task_exit(tsk); + kmsan_task_exit(tsk); WARN_ON(blk_needs_flush_plug(tsk)); diff --git a/kernel/fork.c b/kernel/fork.c index 2508a4f238a3..22c0d6213eca 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -37,6 +37,7 @@ #include #include #include +#include #include #include #include @@ -934,6 +935,7 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node) account_kernel_stack(tsk, 1); kcov_task_init(tsk); + kmsan_task_create(tsk); #ifdef CONFIG_FAULT_INJECTION tsk->fail_nth = 0; diff --git a/kernel/kthread.c b/kernel/kthread.c index b262f47046ca..33ca743ca8b5 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include #include @@ -350,6 +351,7 @@ struct task_struct *__kthread_create_on_node(int (*threadfn)(void *data), set_cpus_allowed_ptr(task, cpu_all_mask); } kfree(create); + kmsan_task_create(task); return task; }