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

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    Revision 70 - (hide annotations) (download)
    Thu May 11 19:09:22 2006 UTC (18 years ago) by niro
    File size: 1235 byte(s) 
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    1 niro 70 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;