Messages in this thread | | | From | bai <> | Subject | [BUG] video: fbdev: broadsheetfb: Possible null function pointers | Date | Thu, 26 Jul 2018 22:17:44 +0800 |
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In Linux-4.16, drivers/video/fbdev/broadsheetfb.c,
158. static void broadsheet_mmio_send_cmdargs(...) { ...... 163. par->board->mmio_write(...); ...... 166. par->board->mmio_write(...); 167. }
For x86 kernel configuration, I find that there is no assignment of the function pointer ".mmio_write" in the kernel code. So calling the function pointer in lines 163 and 166 may cause a null pointer dereference.
In this file, there are many calls to this function pointer...
Best wishes, Jia-Ju Bai
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