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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: ToAC2kB9JX93EpI+OBV62PNj5n8cfou1piThtfiEMbFBoQVQmPcc0X4KPNkI5YU0YgqbNsCZ+VsQ0OQOaw0w7A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR10MB6183 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-26_04,2025-02-26_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 adultscore=0 mlxlogscore=999 bulkscore=0 suspectscore=0 malwarescore=0 spamscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2502100000 definitions=main-2502260126 X-Proofpoint-GUID: 0bg6MYuZP61ndt-xQxE7r5UMMlEAips9 X-Proofpoint-ORIG-GUID: 0bg6MYuZP61ndt-xQxE7r5UMMlEAips9 On 2/26/25 9:26 AM, Greg KH wrote: > On Wed, Feb 26, 2025 at 09:20:20AM -0500, Chuck Lever wrote: >> On 2/26/25 9:16 AM, Takashi Iwai wrote: >>> On Wed, 26 Feb 2025 15:11:04 +0100, >>> Chuck Lever wrote: >>>> >>>> On 2/26/25 3:38 AM, Takashi Iwai wrote: >>>>> On Sun, 23 Feb 2025 16:18:41 +0100, >>>>> Chuck Lever wrote: >>>>>> >>>>>> On 2/23/25 3:53 AM, Takashi Iwai wrote: >>>>>>> [ resent due to a wrong address for regression reporting, sorry! ] >>>>>>> >>>>>>> Hi, >>>>>>> >>>>>>> we received a bug report showing the regression on 6.13.1 kernel >>>>>>> against 6.13.0. The symptom is that Chrome and VSCode stopped working >>>>>>> with Gnome Scaling, as reported on openSUSE Tumbleweed bug tracker >>>>>>> https://bugzilla.suse.com/show_bug.cgi?id=1236943 >>>>>>> >>>>>>> Quoting from there: >>>>>>> """ >>>>>>> I use the latest TW on Gnome with a 4K display and 150% >>>>>>> scaling. Everything has been working fine, but recently both Chrome >>>>>>> and VSCode (installed from official non-openSUSE channels) stopped >>>>>>> working with Scaling. >>>>>>> .... >>>>>>> I am using VSCode with: >>>>>>> `--enable-features=UseOzonePlatform --enable-features=WaylandWindowDecorations --ozone-platform-hint=auto` and for Chrome, I select `Preferred Ozone platform` == `Wayland`. >>>>>>> """ >>>>>>> >>>>>>> Surprisingly, the bisection pointed to the backport of the commit >>>>>>> b9b588f22a0c049a14885399e27625635ae6ef91 ("libfs: Use d_children list >>>>>>> to iterate simple_offset directories"). >>>>>>> >>>>>>> Indeed, the revert of this patch on the latest 6.13.4 was confirmed to >>>>>>> fix the issue. Also, the reporter verified that the latest 6.14-rc >>>>>>> release is still affected, too. >>>>>>> >>>>>>> For now I have no concrete idea how the patch could break the behavior >>>>>>> of a graphical application like the above. Let us know if you need >>>>>>> something for debugging. (Or at easiest, join to the bugzilla entry >>>>>>> and ask there; or open another bug report at whatever you like.) >>>>>>> >>>>>>> BTW, I'll be traveling tomorrow, so my reply will be delayed. >>>>>>> >>>>>>> >>>>>>> thanks, >>>>>>> >>>>>>> Takashi >>>>>>> >>>>>>> #regzbot introduced: b9b588f22a0c049a14885399e27625635ae6ef91 >>>>>>> #regzbot monitor: https://bugzilla.suse.com/show_bug.cgi?id=1236943 >>>>>> >>>>>> We received a similar report a few days ago, and are likewise puzzled at >>>>>> the commit result. Please report this issue to the Chrome development >>>>>> team and have them come up with a simple reproducer that I can try in my >>>>>> own lab. I'm sure they can quickly get to the bottom of the application >>>>>> stack to identify the misbehaving interaction between OS and app. >>>>> >>>>> Do you know where to report to? >>>> >>>> You'll need to drive this, since you currently have a working >>>> reproducer. >>> >>> No, I don't have, I'm merely a messenger. >> >> Whoever was the original reporter has the ability to reproduce this and >> answer any questions the Chrome team might have. Please have them drive >> this. I'm already two steps removed, so it doesn't make sense for me to >> report a problem for which I have no standing. > > Ugh, no. The bug was explictly bisected to the offending commit. We > should just revert that commit for now and it can come back in the > future if the root-cause is found. > > As the revert seems to be simple, and builds here for me, I guess I'll > have to send it in. {sigh} Note that reverting also reintroduces a CVE. -- Chuck Lever