30 lines
922 B
Diff
30 lines
922 B
Diff
From 97831e31e43bb023d208b2344546a4e51e580dc6 Mon Sep 17 00:00:00 2001
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From: Ruben Devos <devosruben6@gmail.com>
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Date: Sun, 1 Jun 2025 19:18:55 +0200
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Subject: smb: client: add NULL check in automount_fullpath
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page is checked for null in __build_path_from_dentry_optional_prefix
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when tcon->origin_fullpath is not set. However, the check is missing when
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it is set.
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Add a check to prevent a potential NULL pointer dereference.
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Signed-off-by: Ruben Devos <devosruben6@gmail.com>
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Cc: stable@vger.kernel.org
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Signed-off-by: Steve French <stfrench@microsoft.com>
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---
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fs/smb/client/namespace.c | 3 +++
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1 file changed, 3 insertions(+)
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--- a/fs/smb/client/namespace.c
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+++ b/fs/smb/client/namespace.c
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@@ -146,6 +146,9 @@ static char *automount_fullpath(struct d
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}
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spin_unlock(&tcon->tc_lock);
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+ if (unlikely(!page))
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+ return ERR_PTR(-ENOMEM);
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+
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s = dentry_path_raw(dentry, page, PATH_MAX);
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if (IS_ERR(s))
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return s;
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