On Fri, Jan 07, 2022 at 06:57:51AM +0100, Thorsten Leemhuis wrote: > Hi Greg! > > On 01.01.22 11:56, Thorsten Leemhuis wrote: > > Hi, this is your Linux kernel regression tracker speaking. > > > > On 15.12.21 18:20, Greg Kroah-Hartman wrote: > >> From: Alaa Hleihel <alaa@xxxxxxxxxx> > >> > >> [ Upstream commit f0ae4afe3d35e67db042c58a52909e06262b740f ] > >> > >> For the case of IB_MR_TYPE_DM the mr does doesn't have a umem, even though > >> it is a user MR. This causes function mlx5_free_priv_descs() to think that > >> it is a kernel MR, leading to wrongly accessing mr->descs that will get > >> wrong values in the union which leads to attempt to release resources that > >> were not allocated in the first place. > > > > TWIMC, that commit made it into 5.15.y, but is known to cause a > > regression in v5.16-rc: > > > > https://lore.kernel.org/lkml/f298db4ec5fdf7a2d1d166ca2f66020fd9397e5c.1640079962.git.leonro@xxxxxxxxxx/ > > https://lore.kernel.org/all/EEBA2D1C-F29C-4237-901C-587B60CEE113@xxxxxxxxxx/ > > > > A fix for mainline was posted, but got stuck afaics: > > https://lore.kernel.org/lkml/f298db4ec5fdf7a2d1d166ca2f66020fd9397e5c.1640079962.git.leonro@xxxxxxxxxx/ > > > > A revert was also discussed, but not performed: > > https://lore.kernel.org/all/20211222101312.1358616-1-maorg@xxxxxxxxxx/ > > I assume your scripts will catch this, nevertheless FYI: > > Below patch was reverted in mainline, as it "is not the full fix and > still causes to call traces". You likely want to revert it from v5.15.y > as well. For details see > > 4163cb3d1980 ("Revert "RDMA/mlx5: Fix releasing unallocated memory in > dereg MR flow"") > > https://git.kernel.org/torvalds/c/4163cb3d1980383220ad7043002b930995dcba33 Thanks for the heads-up, I have now queued this patch up for 5.15.y. greg k-h
