Re: Regression on linux-next (next-20250205)

[Mike Rapoport <rppt@kernel.org>]

Hello Chaitanya,

On Mon, Feb 10, 2025 at 06:52:35AM +0000, Borah, Chaitanya Kumar wrote:
> 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].
 
Does this fix it for you?


diff --git a/kernel/module/main.c b/kernel/module/main.c
index 4a02503836d7..a598888e7072 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c
@@ -1260,7 +1260,8 @@ static int module_memory_alloc(struct module *mod, enum mod_mem_type type)
 	 * *do* eventually get freed, but let's just keep things simple
 	 * and avoid *any* false positives.
 	 */
-	kmemleak_not_leak(ptr);
+	if (!mod->mem[type].is_rox)
+		kmemleak_not_leak(ptr);
 
 	memset(ptr, 0, size);
 	mod->mem[type].base = ptr;


> [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

-- 
Sincerely yours,
Mike.