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Michael Walle > ; Takahiro Kuwano ; > Tudor Ambarus ; linux-mtd@lists.infradead.org > ; linux-kernel@vger.kernel.org kernel@vger.kernel.org> > *Subject:* [PATCH 0/2] mtd: spi-nor: Fix unbind deadlock and use-after-free > From: Tze Yee Ng > > Two fixes in the spi-nor core around locking and driver unbind: > > Patch 1 fixes a self-deadlock in spi_nor_rww_start_exclusive(), which > took nor->lock while its end helper re-acquired it via guard(mutex). > > Patch 2 fixes a use-after-free where a sysfs unbind frees the > devm-allocated spi_nor while /dev/mtdX is still open. Give it a kref > lifetime on the spi-mem probe path and fail operations with -ENODEV > after unbind. Legacy controllers are unchanged. > > Tze Yee Ng (2): >   mtd: spi-nor: Fix deadlock in spi_nor_rww_start_exclusive() >   mtd: spi-nor: core: Fix use-after-free of spi_nor on unbind with open >     handles > >  drivers/mtd/spi-nor/core.c  | 113 ++++++++++++++++++++++++++++++++---- >  include/linux/mtd/spi-nor.h |  17 ++++++ >  2 files changed, 119 insertions(+), 11 deletions(-) > > -- > 2.43.7 > Hi, Gentle ping on this patch. It has been over 2 weeks with no feedback. Happy to address any review comments. Thanks, Tze Yee