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 e5730986758f..d3286d8634d9 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -1550,6 +1550,7 @@ 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; }