From: Jinjie Ruan <ruanjinjie@huawei.com>
To: <corbet@lwn.net>, <skhan@linuxfoundation.org>,
<catalin.marinas@arm.com>, <will@kernel.org>,
<chenhuacai@kernel.org>, <kernel@xen0n.name>,
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Cc: <ruanjinjie@huawei.com>
Subject: [PATCH v12 02/15] powerpc/crash: Fix possible memory leak in update_crash_elfcorehdr()
Date: Thu, 2 Apr 2026 15:26:48 +0800 [thread overview]
Message-ID: <20260402072701.628293-3-ruanjinjie@huawei.com> (raw)
In-Reply-To: <20260402072701.628293-1-ruanjinjie@huawei.com>
In get_crash_memory_ranges(), if crash_exclude_mem_range() failed
after realloc_mem_ranges() has successfully allocated the cmem
memory, it just returns an error but leaves cmem pointing to
the allocated memory, nor is it freed in the caller
update_crash_elfcorehdr(), which cause a memory leak, goto out
to free the cmem.
Cc: Sourabh Jain <sourabhjain@linux.ibm.com>
Cc: Hari Bathini <hbathini@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Fixes: 849599b702ef ("powerpc/crash: add crash memory hotplug support")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
---
arch/powerpc/kexec/crash.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kexec/crash.c b/arch/powerpc/kexec/crash.c
index a325c1c02f96..1d12cef8e1e0 100644
--- a/arch/powerpc/kexec/crash.c
+++ b/arch/powerpc/kexec/crash.c
@@ -440,7 +440,7 @@ static void update_crash_elfcorehdr(struct kimage *image, struct memory_notify *
ret = get_crash_memory_ranges(&cmem);
if (ret) {
pr_err("Failed to get crash mem range\n");
- return;
+ goto out;
}
/*
--
2.34.1
next prev parent reply other threads:[~2026-04-02 7:26 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-02 7:26 [PATCH v12 00/15] arm64/riscv: Add support for crashkernel CMA reservation Jinjie Ruan
2026-04-02 7:26 ` [PATCH v12 01/15] riscv: kexec_file: Fix crashk_low_res not exclude bug Jinjie Ruan
2026-04-02 7:26 ` Jinjie Ruan [this message]
2026-04-02 10:57 ` [PATCH v12 02/15] powerpc/crash: Fix possible memory leak in update_crash_elfcorehdr() Sourabh Jain
2026-04-02 7:26 ` [PATCH v12 03/15] x86/kexec: Fix potential buffer overflow in prepare_elf_headers() Jinjie Ruan
2026-04-02 7:26 ` [PATCH v12 04/15] arm64: kexec_file: " Jinjie Ruan
2026-04-02 7:26 ` [PATCH v12 05/15] riscv: " Jinjie Ruan
2026-04-02 7:26 ` [PATCH v12 06/15] LoongArch: kexec: " Jinjie Ruan
2026-04-02 7:26 ` [PATCH v12 07/15] powerpc/crash: sort crash memory ranges before preparing elfcorehdr Jinjie Ruan
2026-04-02 7:26 ` [PATCH v12 08/15] crash: Add crash_prepare_headers() to exclude crash kernel memory Jinjie Ruan
2026-04-02 7:26 ` [PATCH v12 09/15] arm64: kexec_file: Use crash_prepare_headers() helper to simplify code Jinjie Ruan
2026-04-02 7:26 ` [PATCH v12 10/15] x86/kexec: " Jinjie Ruan
2026-04-02 7:26 ` [PATCH v12 11/15] riscv: kexec_file: " Jinjie Ruan
2026-04-02 7:26 ` [PATCH v12 12/15] LoongArch: kexec: " Jinjie Ruan
2026-04-02 7:26 ` [PATCH v12 13/15] crash: Use crash_exclude_core_ranges() on powerpc Jinjie Ruan
2026-04-02 7:27 ` [PATCH v12 14/15] arm64: kexec: Add support for crashkernel CMA reservation Jinjie Ruan
2026-04-02 7:27 ` [PATCH v12 15/15] riscv: " Jinjie Ruan
2026-04-02 11:31 ` [PATCH v12 00/15] arm64/riscv: " Borislav Petkov
2026-04-02 11:47 ` Jinjie Ruan
2026-04-02 13:36 ` Borislav Petkov
2026-04-03 9:14 ` Jinjie Ruan
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