Re: [PATCH 2/2] fbdev: fbmem: Fix double free of 'fb_info->pixmap.addr'

Hi Zheyu, On Sun, Oct 10, 2021 at 06:42:28AM +, Zheyu Ma wrote: > savagefb and some other drivers call kfree to free 'info->pixmap.addr' > even after calling unregister_framebuffer, which may cause double free. > > Fix this by setting 'fb_info->pixmap.addr' to NULL after kfree in > unregister

[PATCH 2/2] fbdev: fbmem: Fix double free of 'fb_info->pixmap.addr'

savagefb and some other drivers call kfree to free 'info->pixmap.addr' even after calling unregister_framebuffer, which may cause double free. Fix this by setting 'fb_info->pixmap.addr' to NULL after kfree in unregister_framebuffer. The following log reveals it: [ 37.318872] BUG: KASAN: double