Re: [PATCH v2] scsi: sg: Avoid sg device teardown race

On Wed, Mar 20, 2024 at 12:08:09PM +0100, Alexander Wetzel wrote:

sg_remove_sfp_usercontext() must not use sg_device_destroy() after calling scsi_device_put().

sg_device_destroy() is accessing the parent scsi device request_queue. Which will already be set to NULL when the preceding call to scsi_device_put() removed the last reference to the parent scsi device.

The resulting NULL pointer exception will then crash the kernel.

Link: https://lore.kernel.org/r/20240305150509.23896-1-Alexander@wetzel-home.de Cc: stable@vger.kernel.org Signed-off-by: Alexander Wetzel Alexander@wetzel-home.de

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Changes compared to V1: Reworked the commit message

What commit id does this fix?

thanks,

greg k-h