* [PATCH AUTOSEL 4.9 5/8] proc/vmcore: fix potential memory leak in vmcore_init()
[not found] <20221217153053.99513-1-sashal@kernel.org>
@ 2022-12-17 15:30 ` Sasha Levin
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From: Sasha Levin @ 2022-12-17 15:30 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Jianglei Nie, Baoquan He, Benjamin Herrenschmidt, Chen Lifu,
Eric W . Biederman, Li Chen, Michael Ellerman, Paul Mackerras,
Petr Mladek, Russell King, ye xingchen, Zeal Robot, Andrew Morton,
Sasha Levin, kexec, linux-fsdevel
From: Jianglei Nie <niejianglei2021@163.com>
[ Upstream commit 12b9d301ff73122aebd78548fa4c04ca69ed78fe ]
Patch series "Some minor cleanup patches resent".
The first three patches trivial clean up patches.
And for the patch "kexec: replace crash_mem_range with range", I got a
ibm-p9wr ppc64le system to test, it works well.
This patch (of 4):
elfcorehdr_alloc() allocates a memory chunk for elfcorehdr_addr with
kzalloc(). If is_vmcore_usable() returns false, elfcorehdr_addr is a
predefined value. If parse_crash_elf_headers() gets some error and
returns a negetive value, the elfcorehdr_addr should be released with
elfcorehdr_free().
Fix it by calling elfcorehdr_free() when parse_crash_elf_headers() fails.
Link: https://lkml.kernel.org/r/20220929042936.22012-1-bhe@redhat.com
Link: https://lkml.kernel.org/r/20220929042936.22012-2-bhe@redhat.com
Signed-off-by: Jianglei Nie <niejianglei2021@163.com>
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chen Lifu <chenlifu@huawei.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: Li Chen <lchen@ambarella.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: ye xingchen <ye.xingchen@zte.com.cn>
Cc: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/proc/vmcore.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index e8b40835770c..76d60555d1c3 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -1177,6 +1177,7 @@ static int __init vmcore_init(void)
return rc;
rc = parse_crash_elf_headers();
if (rc) {
+ elfcorehdr_free(elfcorehdr_addr);
pr_warn("Kdump: vmcore not initialized\n");
return rc;
}
--
2.35.1
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