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Fri, 22 Nov 2019 03:27:22 -0800 (PST) Date: Fri, 22 Nov 2019 12:26:03 +0100 In-Reply-To: <20191122112621.204798-1-glider@google.com> Message-Id: <20191122112621.204798-19-glider@google.com> Mime-Version: 1.0 References: <20191122112621.204798-1-glider@google.com> X-Mailer: git-send-email 2.24.0.432.g9d3f5f5b63-goog Subject: [PATCH RFC v3 18/36] kmsan: disable LOCK_DEBUGGING_SUPPORT From: glider@google.com To: Eric Biggers , Qian Cai , Christoph Hellwig , Herbert Xu , Harry Wentland , Vegard Nossum , Dmitry Vyukov , linux-mm@kvack.org Cc: glider@google.com, viro@zeniv.linux.org.uk, adilger.kernel@dilger.ca, akpm@linux-foundation.org, andreyknvl@google.com, aryabinin@virtuozzo.com, luto@kernel.org, ard.biesheuvel@linaro.org, arnd@arndb.de, hch@infradead.org, darrick.wong@oracle.com, davem@davemloft.net, dmitry.torokhov@gmail.com, edumazet@google.com, ericvh@gmail.com, gregkh@linuxfoundation.org, iii@linux.ibm.com, mingo@elte.hu, jasowang@redhat.com, axboe@kernel.dk, m.szyprowski@samsung.com, elver@google.com, mark.rutland@arm.com, martin.petersen@oracle.com, schwidefsky@de.ibm.com, willy@infradead.org, mst@redhat.com, monstr@monstr.eu, pmladek@suse.com, 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, wsa@the-dreams.de 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: KMSAN doesn't currently support lock debugging, causing the kernel to enter infinite recursion at boot time. See https://github.com/google/kmsan/issues/57. Signed-off-by: Alexander Potapenko Cc: Eric Biggers Cc: Qian Cai Cc: Christoph Hellwig Cc: Herbert Xu Cc: Harry Wentland Cc: Vegard Nossum Cc: Dmitry Vyukov Cc: linux-mm@kvack.org --- This patch is part of "kmsan: Kconfig changes to disable options incompatible with KMSAN", which was split into smaller pieces. diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 75c36318943d..a3f6f5d68593 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1068,6 +1068,9 @@ menu "Lock Debugging (spinlocks, mutexes, etc...)" config LOCK_DEBUGGING_SUPPORT bool depends on TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT + # KMSAN is incompatible with lockdep, + # see https://github.com/google/kmsan/issues/57. + depends on !KMSAN default y config PROVE_LOCKING Change-Id: I4f97edc8a02d8ca208fc914e55e8f0c23d74eac8 --- lib/Kconfig.debug | 3 +++ 1 file changed, 3 insertions(+) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 75c36318943d..a3f6f5d68593 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1068,6 +1068,9 @@ menu "Lock Debugging (spinlocks, mutexes, etc...)" config LOCK_DEBUGGING_SUPPORT bool depends on TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT + # KMSAN is incompatible with lockdep, + # see https://github.com/google/kmsan/issues/57. + depends on !KMSAN default y config PROVE_LOCKING