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    Contents of /trunk/kernel26-magellan/patches-2.6.16-r10/0118-2.6.16.12-lsm.patch

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    Revision 70 - (show annotations) (download)
    Thu May 11 19:09:22 2006 UTC (18 years ago) by niro
    File size: 1235 byte(s) 
    import
    1 From: James Morris <jmorris@namei.org>
    2 Date: Wed, 26 Apr 2006 15:11:00 +0000 (+0000)
    3 Subject: [PATCH] LSM: add missing hook to do_compat_readv_writev()
    4 X-Git-Url: http://www.kernel.org/git/?p=linux/kernel/git/stable/linux-2.6.16.y.git;a=commitdiff;h=9120b4470e2e57f196a0e470898ae628725fb4c2
    5
    6 [PATCH] LSM: add missing hook to do_compat_readv_writev()
    7
    8 This patch addresses a flaw in LSM, where there is no mediation of readv()
    9 and writev() in for 32-bit compatible apps using a 64-bit kernel.
    10
    11 This bug was discovered and fixed initially in the native readv/writev
    12 code [1], but was not fixed in the compat code. Thanks to Al for spotting
    13 this one.
    14
    15 [1] http://lwn.net/Articles/154282/
    16
    17 Signed-off-by: James Morris <jmorris@namei.org>
    18 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
    19 Signed-off-by: Linus Torvalds <torvalds@osdl.org>
    20 Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
    21 Signed-off-by: Chris Wright <chrisw@sous-sol.org>
    22 ---
    23
    24 --- a/fs/compat.c
    25 +++ b/fs/compat.c
    26 @@ -1215,6 +1215,10 @@ static ssize_t compat_do_readv_writev(in
    27 if (ret < 0)
    28 goto out;
    29
    30 + ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE);
    31 + if (ret)
    32 + goto out;
    33 +
    34 fnv = NULL;
    35 if (type == READ) {
    36 fn = file->f_op->read;