Hello Mike, Hope you are doing well. I am Chaitanya from the linux graphics team in Intel. This mail is regarding a regression we are seeing in our CI runs[1] on linux-next repository. Since the version next-20250205 [2], we are seeing the following regression ````````````````````````````````````````````````````````````````````````````````` <4>[ 314.781734] kmemleak: Found object by alias at 0xffffffffa0595000 <4>[ 314.781738] CPU: 11 UID: 0 PID: 6042 Comm: i915_selftest Tainted: G U 6.14.0-rc1-next-20250205-next-20250205-ged88b8b82c53+ #1 <4>[ 314.781741] Tainted: [U]=USER <4>[ 314.781741] Hardware name: ASUS System Product Name/PRIME Z790-P WIFI, BIOS 0812 02/24/2023 <4>[ 314.781742] Call Trace: <4>[ 314.781743] <TASK> <4>[ 314.781744] dump_stack_lvl+0x91/0xf0 <4>[ 314.781749] dump_stack+0x10/0x20 <4>[ 314.781751] __lookup_object+0x90/0xa0 <4>[ 314.781755] __find_and_get_object+0x6c/0x190 <4>[ 314.781758] paint_ptr+0x1b/0xa0 <4>[ 314.781759] kmemleak_not_leak+0x33/0x70 <4>[ 314.781762] load_module+0xa20/0x2d10 ````````````````````````````````````````````````````````````````````````````````` Details log can be found in [3]. After bisecting the tree, the following patch [4] seems to be the first "bad" commit ````````````````````````````````````````````````````````````````````````````````````````````````````````` commit 64f6a4e10c05ed527f0f24b7954964255e0d3535 Author: Mike Rapoport (Microsoft) mailto:rppt@xxxxxxxxxx Date: Sun Jan 26 09:47:33 2025 +0200 x86: re-enable EXECMEM_ROX support after rework of execmem ROX caches Signed-off-by: "Mike Rapoport (Microsoft)" mailto:rppt@xxxxxxxxxx Signed-off-by: Peter Zijlstra (Intel) mailto:peterz@xxxxxxxxxxxxx Link: https://lore.kernel.org/r/20250126074733.1384926-10-rppt@xxxxxxxxxx ````````````````````````````````````````````````````````````````````````````````````````````````````````` We also verified that if we revert the patch the issue is not seen. Could you please check why the patch causes this regression and provide a fix if necessary? Thank you. Regards Chaitanya [1] https://intel-gfx-ci.01.org/tree/linux-next/combined-alt.html? [2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20250205 [3] https://intel-gfx-ci.01.org/tree/linux-next/next-20250205/bat-rpls-4/dmesg0.txt [4] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20250205&id=64f6a4e10c05ed527f0f24b7954964255e0d3535 Regards Chaitanya
