From 12b9d301ff73122aebd78548fa4c04ca69ed78fe Mon Sep 17 00:00:00 2001 From: Jianglei Nie Date: Thu, 29 Sep 2022 12:29:33 +0800 Subject: proc/vmcore: fix potential memory leak in vmcore_init() 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 Signed-off-by: Baoquan He Acked-by: Baoquan He Cc: Benjamin Herrenschmidt Cc: Chen Lifu Cc: "Eric W . Biederman" Cc: Li Chen Cc: Michael Ellerman Cc: Paul Mackerras Cc: Petr Mladek Cc: Russell King Cc: ye xingchen Cc: Zeal Robot Signed-off-by: Andrew Morton --- fs/proc/vmcore.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/proc') diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index f2aa86c421f2..74747571d58e 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -1567,6 +1567,7 @@ 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; } -- cgit v1.2.3