From: Ian Kent <raven@themaw.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>,
autofs mailing list <autofs@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [PATCH v2 2/5] autofs - fix possible inode leak in autofs_fill_super()
Date: Fri, 23 Nov 2018 18:41:57 +0800 [thread overview]
Message-ID: <154296971705.9889.9822861969081020188.stgit@pluto-themaw-net> (raw)
In-Reply-To: <154296962626.9889.644199825100770992.stgit@pluto-themaw-net>
There is no check at all for a failure to allocate the root inode
in autofs_fill_super(), handle it.
Signed-off-by: Ian Kent <raven@themaw.net>
---
fs/autofs/inode.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c
index 846c052569dd..e5c06b5a7371 100644
--- a/fs/autofs/inode.c
+++ b/fs/autofs/inode.c
@@ -254,9 +254,13 @@ int autofs_fill_super(struct super_block *s, void *data, int silent)
goto fail_free;
}
root_inode = autofs_get_inode(s, S_IFDIR | 0755);
+ if (!root_inode) {
+ ret = -ENOMEM;
+ goto fail_ino;
+ }
root = d_make_root(root_inode);
if (!root)
- goto fail_ino;
+ goto fail_iput;
pipe = NULL;
root->d_fsdata = ino;
@@ -304,8 +308,8 @@ int autofs_fill_super(struct super_block *s, void *data, int silent)
root_inode->i_op = &autofs_dir_inode_operations;
pr_debug("pipe fd = %d, pgrp = %u\n", pipefd, pid_nr(sbi->oz_pgrp));
- pipe = fget(pipefd);
+ pipe = fget(pipefd);
if (!pipe) {
pr_err("could not open pipe file descriptor\n");
goto fail_put_pid;
@@ -334,6 +338,8 @@ int autofs_fill_super(struct super_block *s, void *data, int silent)
fail_dput:
dput(root);
goto fail_free;
+fail_iput:
+ iput(root_inode);
fail_ino:
autofs_free_ino(ino);
fail_free:
next prev parent reply other threads:[~2018-11-23 10:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-23 10:41 [PATCH v2 0/5] autofs updates Ian Kent
2018-11-23 10:41 ` [PATCH v2 1/5] autofs - improve ioctl sbi checks Ian Kent
2018-11-23 23:29 ` Andrew Morton
2018-11-25 22:57 ` Ian Kent
2018-11-23 10:41 ` Ian Kent [this message]
2018-11-23 10:42 ` [PATCH v2 3/5] autofs - simplify parse_options() function call Ian Kent
2018-11-23 10:42 ` [PATCH v2 4/5] autofs - change catatonic setting to a bit flag Ian Kent
2018-11-23 10:42 ` [PATCH v2 5/5] autofs - add strictexpire mount option Ian Kent
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