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Tue, 03 Sep 2024 11:57:32 +0200 Message-ID: Date: Tue, 3 Sep 2024 11:57:31 +0200 Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: WARNING: CPU: 0 PID: 8 at drivers/video/fbdev/core/fbmem.c:467 unregister_framebuffer+0x45/0x160 To: "V, Narasimhan" Cc: Linux Next Mailing List , Daniel Vetter , "linux-fbdev@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , open list , "linux@weissschuh.net" , Borislav Petkov , Thomas Zimmermann References: <20240902084546.GAZtV7Ot58w7D90fwQ@fat_crate.local> <7cf68133-e6f5-4fef-92ae-7a8c30631fb5@suse.de> Content-Language: en-US From: Helge Deller Autocrypt: addr=deller@gmx.de; keydata= xsFNBF3Ia3MBEAD3nmWzMgQByYAWnb9cNqspnkb2GLVKzhoH2QD4eRpyDLA/3smlClbeKkWT HLnjgkbPFDmcmCz5V0Wv1mKYRClAHPCIBIJgyICqqUZo2qGmKstUx3pFAiztlXBANpRECgwJ r+8w6mkccOM9GhoPU0vMaD/UVJcJQzvrxVHO8EHS36aUkjKd6cOpdVbCt3qx8cEhCmaFEO6u CL+k5AZQoABbFQEBocZE1/lSYzaHkcHrjn4cQjc3CffXnUVYwlo8EYOtAHgMDC39s9a7S90L 69l6G73lYBD/Br5lnDPlG6dKfGFZZpQ1h8/x+Qz366Ojfq9MuuRJg7ZQpe6foiOtqwKym/zV dVvSdOOc5sHSpfwu5+BVAAyBd6hw4NddlAQUjHSRs3zJ9OfrEx2d3mIfXZ7+pMhZ7qX0Axlq Lq+B5cfLpzkPAgKn11tfXFxP+hcPHIts0bnDz4EEp+HraW+oRCH2m57Y9zhcJTOJaLw4YpTY GRUlF076vZ2Hz/xMEvIJddRGId7UXZgH9a32NDf+BUjWEZvFt1wFSW1r7zb7oGCwZMy2LI/G aHQv/N0NeFMd28z+deyxd0k1CGefHJuJcOJDVtcE1rGQ43aDhWSpXvXKDj42vFD2We6uIo9D 1VNre2+uAxFzqqf026H6cH8hin9Vnx7p3uq3Dka/Y/qmRFnKVQARAQABzRxIZWxnZSBEZWxs ZXIgPGRlbGxlckBnbXguZGU+wsGRBBMBCAA7AhsDBQsJCAcCBhUKCQgLAgQWAgMBAh4BAheA FiEERUSCKCzZENvvPSX4Pl89BKeiRgMFAl3J1zsCGQEACgkQPl89BKeiRgNK7xAAg6kJTPje uBm9PJTUxXaoaLJFXbYdSPfXhqX/BI9Xi2VzhwC2nSmizdFbeobQBTtRIz5LPhjk95t11q0s uP5htzNISPpwxiYZGKrNnXfcPlziI2bUtlz4ke34cLK6MIl1kbS0/kJBxhiXyvyTWk2JmkMi REjR84lCMAoJd1OM9XGFOg94BT5aLlEKFcld9qj7B4UFpma8RbRUpUWdo0omAEgrnhaKJwV8 qt0ULaF/kyP5qbI8iA2PAvIjq73dA4LNKdMFPG7Rw8yITQ1Vi0DlDgDT2RLvKxEQC0o3C6O4 iQq7qamsThLK0JSDRdLDnq6Phv+Yahd7sDMYuk3gIdoyczRkXzncWAYq7XTWl7nZYBVXG1D8 gkdclsnHzEKpTQIzn/rGyZshsjL4pxVUIpw/vdfx8oNRLKj7iduf11g2kFP71e9v2PP94ik3 Xi9oszP+fP770J0B8QM8w745BrcQm41SsILjArK+5mMHrYhM4ZFN7aipK3UXDNs3vjN+t0zi qErzlrxXtsX4J6nqjs/mF9frVkpv7OTAzj7pjFHv0Bu8pRm4AyW6Y5/H6jOup6nkJdP/AFDu 5ImdlA0jhr3iLk9s9WnjBUHyMYu+HD7qR3yhX6uWxg2oB2FWVMRLXbPEt2hRGq09rVQS7DBy dbZgPwou7pD8MTfQhGmDJFKm2jvOwU0EXchrcwEQAOsDQjdtPeaRt8EP2pc8tG+g9eiiX9Sh rX87SLSeKF6uHpEJ3VbhafIU6A7hy7RcIJnQz0hEUdXjH774B8YD3JKnAtfAyuIU2/rOGa/v UN4BY6U6TVIOv9piVQByBthGQh4YHhePSKtPzK9Pv/6rd8H3IWnJK/dXiUDQllkedrENXrZp eLUjhyp94ooo9XqRl44YqlsrSUh+BzW7wqwfmu26UjmAzIZYVCPCq5IjD96QrhLf6naY6En3 ++tqCAWPkqKvWfRdXPOz4GK08uhcBp3jZHTVkcbo5qahVpv8Y8mzOvSIAxnIjb+cklVxjyY9 dVlrhfKiK5L+zA2fWUreVBqLs1SjfHm5OGuQ2qqzVcMYJGH/uisJn22VXB1c48yYyGv2HUN5 lC1JHQUV9734I5cczA2Gfo27nTHy3zANj4hy+s/q1adzvn7hMokU7OehwKrNXafFfwWVK3OG 1dSjWtgIv5KJi1XZk5TV6JlPZSqj4D8pUwIx3KSp0cD7xTEZATRfc47Yc+cyKcXG034tNEAc xZNTR1kMi9njdxc1wzM9T6pspTtA0vuD3ee94Dg+nDrH1As24uwfFLguiILPzpl0kLaPYYgB wumlL2nGcB6RVRRFMiAS5uOTEk+sJ/tRiQwO3K8vmaECaNJRfJC7weH+jww1Dzo0f1TP6rUa fTBRABEBAAHCwXYEGAEIACAWIQRFRIIoLNkQ2+89Jfg+Xz0Ep6JGAwUCXchrcwIbDAAKCRA+ Xz0Ep6JGAxtdEAC54NQMBwjUNqBNCMsh6WrwQwbg9tkJw718QHPw43gKFSxFIYzdBzD/YMPH l+2fFiefvmI4uNDjlyCITGSM+T6b8cA7YAKvZhzJyJSS7pRzsIKGjhk7zADL1+PJei9p9idy RbmFKo0dAL+ac0t/EZULHGPuIiavWLgwYLVoUEBwz86ZtEtVmDmEsj8ryWw75ZIarNDhV74s BdM2ffUJk3+vWe25BPcJiaZkTuFt+xt2CdbvpZv3IPrEkp9GAKof2hHdFCRKMtgxBo8Kao6p Ws/Vv68FusAi94ySuZT3fp1xGWWf5+1jX4ylC//w0Rj85QihTpA2MylORUNFvH0MRJx4mlFk XN6G+5jIIJhG46LUucQ28+VyEDNcGL3tarnkw8ngEhAbnvMJ2RTx8vGh7PssKaGzAUmNNZiG MB4mPKqvDZ02j1wp7vthQcOEg08z1+XHXb8ZZKST7yTVa5P89JymGE8CBGdQaAXnqYK3/yWf FwRDcGV6nxanxZGKEkSHHOm8jHwvQWvPP73pvuPBEPtKGLzbgd7OOcGZWtq2hNC6cRtsRdDx 4TAGMCz4j238m+2mdbdhRh3iBnWT5yPFfnv/2IjFAk+sdix1Mrr+LIDF++kiekeq0yUpDdc4 ExBy2xf6dd+tuFFBp3/VDN4U0UfG4QJ2fg19zE5Z8dS4jGIbLg== In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:389BbgrKUHP4R8kCESjZBLV0SV3qAK4VuvT+82dgQcZxWfk1DrU x9G1T22rxcIU13IUCWRpSaYqns2rnkakU8tn/vQvXWieOOY8smH3ypt31oVU2uDa4h8PkFg ncBNt02YfYTWO1ZOPUnkuO7ZZol4E43u513WHlQsHqw1wp/+vz5eyISObsJKJHZoEKSlkVU CIL6S+ZIBGcLzo4Y6BI2Q== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:Nm9md8xaj2U=;A5u45uJZ+crzFCaZF8i0RekU4xl VYJgZVONjAYNnA60nIGOFSDOfKIUjAvAIXhA/DBFjTeejdVJg4ryKi7MHUfk4kaVTvC0Sb+1m P3lQ3Kca6FsfJshcAba+oIcid3bVym7211Im90GeO7tRXYhAYyZAtd/jYwu9RejKSWIbtk7bE pz9t9kb3+IUytS++cz403gedTdQm68WrlzM/FisDMj+Z4ee9KeyUuGg1ypP7xyndvTz/1dOAO 2B0/QnUjXborVQVw72nrQxLtaNpTOgpgYftcirkOt7QOjfKVkadCcb449+KSv1tlO9W5QxwBD rZbhrdKIa1yYDsPhm4goO1IwwrKJseO1XZSl+X6pey+uxfoMly+1CKMoEctxBWqxNfZ5ijK9o 2N8V+fTAaVLW3R89hFtw2AbeYrnVKO/ja/UtUaw3H8YeC7Kn4FnGGVkxKz8RIOSmnagmabfMt v/7T+BWIOpkFIXHMyog9zVSUGCxp1Lgv5sh/AQrs1BfVkh1ZRXSYKRvnPncj5/CYknphuglPh OIg0RqXIGqbcgPEhA+WBCj0eF3Ashr1KhAjP6o52uOGbr+Uom3bpicRmjWdJ+Fp6IWeiWPfD0 mI32gyyX/h6hk4bWoNeeVWE6p6GFHG1RFiuCRGWaM1+MGqT6PCcCZLDdz6LV3BBcTmJ2FuD9J J6tAEVmUuIonjroSaPq9RtN0cWnbqrrgkrLFGhYNmqIwwVODn4A0swDGurCKjMtJ4+ZxIItVV ljmUWWMAdr/CSVKdgKFgDaOjgY/G8Lpssho5MqgxpjvCyPU9xkAMz2K48kV802Uw3Sy2hie7+ piQtySmZlHxGVsWIqZG0U20g== On 9/3/24 11:56, V, Narasimhan wrote: > [AMD Official Use Only - AMD Internal Distribution Only] > > Hi, > > > ________________________________________ > From: Helge Deller > Sent: Tuesday, September 3, 2024 01:48 AM > To: V, Narasimhan; Thomas Zimmermann > Cc: Linux Next Mailing List; Daniel Vetter; linux-fbdev@vger.kernel.org;= dri-devel@lists.freedesktop.org; open list; linux@weissschuh.net; Borisla= v 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 >>>>>> Seeing the following warning and bug on boot with linux-next-202408= 29 >>>>>> >>>>>> WARNING: CPU: 0 PID: 8 at drivers/video/fbdev/core/fbmem.c:467 unre= gister_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=3D138008&rev= =3D1 > >> Current fbdev git tree and for-next series have this newer patch alread= y. >> 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 m= ore seen with today's linux-next build. Great. Thanks for testing! Helge