+ coredump-fix-memleak-in-dump_vma_snapshot.patch added to -mm tree

+ coredump-fix-memleak-in-dump_vma_snapshot.patch added to -mm tree

[akpm]

The patch titled
     Subject: coredump: fix memleak in dump_vma_snapshot()
has been added to the -mm tree.  Its filename is
     coredump-fix-memleak-in-dump_vma_snapshot.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/coredump-fix-memleak-in-dump_vma_snapshot.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/coredump-fix-memleak-in-dump_vma_snapshot.patch

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------------------------------------------------------
From: QiuXi <qiuxi1@huawei.com>
Subject: coredump: fix memleak in dump_vma_snapshot()

dump_vma_snapshot() allocs memory for *vma_meta, when dump_vma_snapshot()
returns -EFAULT, the memory will be leaked, so we free it correctly.

Link: https://lkml.kernel.org/r/20210810020441.62806-1-qiuxi1@huawei.com
Fixes: a07279c9a8cd7 ("binfmt_elf, binfmt_elf_fdpic: use a VMA list snapshot")
Signed-off-by: QiuXi <qiuxi1@huawei.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jann Horn <jannh@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/coredump.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/coredump.c~coredump-fix-memleak-in-dump_vma_snapshot
+++ a/fs/coredump.c
@@ -1134,8 +1134,10 @@ int dump_vma_snapshot(struct coredump_pa
 
 	mmap_write_unlock(mm);
 
-	if (WARN_ON(i != *vma_count))
+	if (WARN_ON(i != *vma_count)) {
+		kvfree(*vma_meta);
 		return -EFAULT;
+	}
 
 	*vma_data_size_ptr = vma_data_size;
 	return 0;
_

Patches currently in -mm which might be from qiuxi1@huawei.com are

coredump-fix-memleak-in-dump_vma_snapshot.patch