The patch titled
Subject: kmemleak-test: add percpu leak
has been added to the -mm mm-unstable branch. Its filename is
kmemleak-test-add-percpu-leak.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kmemleak-test-add-percpu-leak.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Pavel Tikhomirov <ptikhomirov@xxxxxxxxxxxxx>
Subject: kmemleak-test: add percpu leak
Date: Thu, 25 Jul 2024 12:12:16 +0800
Add a per-CPU memory leak, which will be reported like:
unreferenced object 0x3efa840195f8 (size 64):
comm "modprobe", pid 4667, jiffies 4294688677
hex dump (first 32 bytes on cpu 0):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 0):
[<ffffffffa7fa87af>] pcpu_alloc+0x3df/0x840
[<ffffffffc11642d9>] kmemleak_test_init+0x2c9/0x2f0 [kmemleak_test]
[<ffffffffa7c02264>] do_one_initcall+0x44/0x300
[<ffffffffa7de9e10>] do_init_module+0x60/0x240
[<ffffffffa7deb946>] init_module_from_file+0x86/0xc0
[<ffffffffa7deba99>] idempotent_init_module+0x109/0x2a0
[<ffffffffa7debd2a>] __x64_sys_finit_module+0x5a/0xb0
[<ffffffffa88f4f3a>] do_syscall_64+0x7a/0x160
[<ffffffffa8a0012b>] entry_SYSCALL_64_after_hwframe+0x76/0x7e
Link: https://lkml.kernel.org/r/20240725041223.872472-3-ptikhomirov@xxxxxxxxxxxxx
Signed-off-by: Pavel Tikhomirov <ptikhomirov@xxxxxxxxxxxxx>
Cc: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@xxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Chen Jun <chenjun102@xxxxxxxxxx>
Cc: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
samples/kmemleak/kmemleak-test.c | 2 ++
1 file changed, 2 insertions(+)
--- a/samples/kmemleak/kmemleak-test.c~kmemleak-test-add-percpu-leak
+++ a/samples/kmemleak/kmemleak-test.c
@@ -79,6 +79,8 @@ static int kmemleak_test_init(void)
per_cpu(kmemleak_test_pointer, i));
}
+ pr_info("__alloc_percpu(64, 4) = %p\n", __alloc_percpu(64, 4));
+
return 0;
}
module_init(kmemleak_test_init);
_
Patches currently in -mm which might be from ptikhomirov@xxxxxxxxxxxxx are
kmemleak-enable-tracking-for-percpu-pointers.patch
kmemleak-test-add-percpu-leak.patch
