[AMD Official Use Only - AMD Internal Distribution Only] Hi,
________________________________________ From: Helge Deller <[email protected]> Sent: Tuesday, September 3, 2024 01:48 AM To: V, Narasimhan; Thomas Zimmermann Cc: Linux Next Mailing List; Daniel Vetter; [email protected]; [email protected]; open list; [email protected]; Borislav Petkov Subject: Re: WARNING: CPU: 0 PID: 8 at drivers/video/fbdev/core/fbmem.c:467 unregister_framebuffer+0x45/0x160 >On 9/2/24 20:56, V, Narasimhan wrote: >> From: Thomas Zimmermann <[email protected]> >>>>> Seeing the following warning and bug on boot with linux-next-20240829 >>>>> >>>>> WARNING: CPU: 0 PID: 8 at drivers/video/fbdev/core/fbmem.c:467 >>>>> unregister_framebuffer+0x45/0x160 >>>>> BUG: kernel NULL pointer dereference, address: 0000000000000000 >> >>> Does it work if you revert one of these commits? >> >>> c2fe0480cd77 ("fbdev/efifb: Use devm_register_framebuffer()") >> >> >> Reverting this commit fixes the issue. > Good. >>> For the latter, there might be a fix at >> >>> https://patchwork.freedesktop.org/patch/611902/?series=138008&rev=1 > Current fbdev git tree and for-next series have this newer patch already. > I expect that the issue is already resolved with there, but it would > be good if you could test. > Helge The patch seems to be already into linux-next tree and the issue is no more seen with today's linux-next build. -- Regards Narasimhan V
