Re: [PATCH v2] ata: fixes kernel crash while tracing ata_eh_link_autopsy event

2017-11-03 Thread Tejun Heo
On Thu, Nov 02, 2017 at 04:31:07PM +0530, Rameshwar Prasad Sahu wrote: > When tracing ata link error event, the kernel crashes when the disk is > removed due to NULL pointer access by trace_ata_eh_link_autopsy API. > This occurs as the dev is NULL when the disk disappeared. This patch > fixes this

[PATCH v2] ata: fixes kernel crash while tracing ata_eh_link_autopsy event

2017-11-02 Thread Rameshwar Prasad Sahu
When tracing ata link error event, the kernel crashes when the disk is removed due to NULL pointer access by trace_ata_eh_link_autopsy API. This occurs as the dev is NULL when the disk disappeared. This patch fixes this crash by calling trace_ata_eh_link_autopsy only if "dev" is not NULL. v2 chang