The patch titled
Subject: userfaultfd: add missing mmput() in error path
has been added to the -mm tree. Its filename is
userfaultfd-add-missing-mmput-in-error-path.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/userfaultfd-add-missing-mmput-in-error-path.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/userfaultfd-add-missing-mmput-in-error-path.patch
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------------------------------------------------------
From: Eric Biggers <ebiggers3@xxxxxxxxx>
Subject: userfaultfd: add missing mmput() in error path
This fixes a memleak if anon_inode_getfile() fails in userfaultfd().
Signed-off-by: Eric Biggers <ebiggers3@xxxxxxxxx>
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/userfaultfd.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN fs/userfaultfd.c~userfaultfd-add-missing-mmput-in-error-path fs/userfaultfd.c
--- a/fs/userfaultfd.c~userfaultfd-add-missing-mmput-in-error-path
+++ a/fs/userfaultfd.c
@@ -1287,8 +1287,10 @@ static struct file *userfaultfd_file_cre
file = anon_inode_getfile("[userfaultfd]", &userfaultfd_fops, ctx,
O_RDWR | (flags & UFFD_SHARED_FCNTL_FLAGS));
- if (IS_ERR(file))
+ if (IS_ERR(file)) {
+ mmput(ctx->mm);
kmem_cache_free(userfaultfd_ctx_cachep, ctx);
+ }
out:
return file;
}
_
Patches currently in -mm which might be from ebiggers3@xxxxxxxxx are
userfaultfd-add-missing-mmput-in-error-path.patch
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