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cifs: Fix uninitialized memory read for smb311 posix symlink create

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commit a152d05ae4 upstream.

If smb311 posix is enabled, we send the intended mode for file
creation in the posix create context. Instead of using what's there on
the stack, create the mfsymlink file with 0644.

Fixes: ce558b0e17 ("smb3: Add posix create context for smb3.11 posix mounts")
Cc: stable@vger.kernel.org
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Tom Talpey <tom@talpey.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Volker Lendecke 2023-01-11 12:37:58 +01:00 • committed by Greg Kroah-Hartman
commit afb6063aa8
1 changed files with 1 additions and 0 deletions
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fs/cifs/link.c
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@ -471,6 +471,7 @@ smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
oparms.disposition = FILE_CREATE; oparms.disposition = FILE_CREATE;
oparms.fid = &fid; oparms.fid = &fid;
oparms.reconnect = false; oparms.reconnect = false;
oparms.mode = 0644;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
NULL, NULL); NULL, NULL);