From 7e54b7d167a23c3ad6a86e378926837cd581b766 Mon Sep 17 00:00:00 2001 From: Waiman Long Date: Wed, 2 Apr 2025 16:03:30 +0800 Subject: [PATCH] efi/arm64: Fix kmemleak false positive in arm64_efi_rt_init() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit mainline inclusion from mainline-v6.10-rc5 commit 46e27b9961d8712bc89234444ede314cec0e8bae category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBYAYI Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=46e27b9961d8712bc89234444ede314cec0e8bae -------------------------------- The kmemleak code sometimes complains about the following leak: unreferenced object 0xffff8000102e0000 (size 32768):   comm "swapper/0", pid 1, jiffies 4294937323 (age 71.240s)   hex dump (first 32 bytes):     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:     [<00000000db9a88a3>] __vmalloc_node_range+0x324/0x450     [<00000000ff8903a4>] __vmalloc_node+0x90/0xd0     [<000000001a06634f>] arm64_efi_rt_init+0x64/0xdc     [<0000000007826a8d>] do_one_initcall+0x178/0xac0     [<0000000054a87017>] do_initcalls+0x190/0x1d0     [<00000000308092d0>] kernel_init_freeable+0x2c0/0x2f0     [<000000003e7b99e0>] kernel_init+0x28/0x14c     [<000000002246af5b>] ret_from_fork+0x10/0x20 The memory object in this case is for efi_rt_stack_top and is allocated in an initcall. So this is certainly a false positive. Mark the object as not a leak to quash it. Signed-off-by: Waiman Long Signed-off-by: Ard Biesheuvel Conflicts: arch/arm64/kernel/efi.c [fix context conflicts] Signed-off-by: Lin Yujun --- arch/arm64/kernel/efi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c index 3ee3b3daca47b..bd34dc1e0480c 100644 --- a/arch/arm64/kernel/efi.c +++ b/arch/arm64/kernel/efi.c @@ -9,6 +9,7 @@ #include #include +#include #include @@ -166,6 +167,7 @@ l: if (!p) { return -ENOMEM; } + kmemleak_not_leak(p); efi_rt_stack_top = p + THREAD_SIZE; return 0; } -- Gitee