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X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: wb+NtICUBfu6bw8b15A2Vp8diRQqK1boFdGOQ5r+cywQyWx4HyRIbP3fWDd55EQYmvZRg1TZZ3Q0lBntsjzlQZIAndUYiKo2PUIW+DXVfvdEZjhVFTN/uge7BDc2Ft32 X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR10MB5562 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-04-19_04,2024-04-17_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 mlxlogscore=999 bulkscore=0 spamscore=0 mlxscore=0 phishscore=0 adultscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2404010000 definitions=main-2404190055 X-Proofpoint-ORIG-GUID: QMU2K5OXif2QViTvzDTtLHaO6B-aMaeY X-Proofpoint-GUID: QMU2K5OXif2QViTvzDTtLHaO6B-aMaeY Hi Nam, On 18/04/24 19:36, Nam Cao wrote: > On 2024-04-18 Harshit Mogalapalli wrote: >> While fuzzing 5.15.y kernel with Syzkaller, we noticed a INFO: task hung >> bug in fb_deferred_io_work() > > Which framebuffer device are you using exactly? It is possible that > the problem is with the device driver, not core framebuffer. > I am not very sure about the answer, but the C reproducer uses(/dev/fb0) int fd = open("/dev/fb0", O_RDWR, 0); Thanks, Harshit > Best regards, > Nam