25 Jan, 2019

1 commit

  • Follow many of recommendations by scripts/checkpatch.pl, and follow
    "lift switch variables out of switches" by Kees Cook.
    This patch makes no functional change.

    Signed-off-by: Tetsuo Handa
    Signed-off-by: James Morris

    Tetsuo Handa
     

02 Nov, 2017

1 commit

  • Many source files in the tree are missing licensing information, which
    makes it harder for compliance tools to determine the correct license.

    By default all files without license information are under the default
    license of the kernel, which is GPL version 2.

    Update the files which contain no license information with the 'GPL-2.0'
    SPDX license identifier. The SPDX identifier is a legally binding
    shorthand, which can be used instead of the full boiler plate text.

    This patch is based on work done by Thomas Gleixner and Kate Stewart and
    Philippe Ombredanne.

    How this work was done:

    Patches were generated and checked against linux-4.14-rc6 for a subset of
    the use cases:
    - file had no licensing information it it.
    - file was a */uapi/* one with no licensing information in it,
    - file was a */uapi/* one with existing licensing information,

    Further patches will be generated in subsequent months to fix up cases
    where non-standard license headers were used, and references to license
    had to be inferred by heuristics based on keywords.

    The analysis to determine which SPDX License Identifier to be applied to
    a file was done in a spreadsheet of side by side results from of the
    output of two independent scanners (ScanCode & Windriver) producing SPDX
    tag:value files created by Philippe Ombredanne. Philippe prepared the
    base worksheet, and did an initial spot review of a few 1000 files.

    The 4.13 kernel was the starting point of the analysis with 60,537 files
    assessed. Kate Stewart did a file by file comparison of the scanner
    results in the spreadsheet to determine which SPDX license identifier(s)
    to be applied to the file. She confirmed any determination that was not
    immediately clear with lawyers working with the Linux Foundation.

    Criteria used to select files for SPDX license identifier tagging was:
    - Files considered eligible had to be source code files.
    - Make and config files were included as candidates if they contained >5
    lines of source
    - File already had some variant of a license header in it (even if
    Reviewed-by: Philippe Ombredanne
    Reviewed-by: Thomas Gleixner
    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

16 Apr, 2015

1 commit


21 Sep, 2012

1 commit


26 Sep, 2011

1 commit

  • When TOMOYO started using garbage collector at commit 847b173e "TOMOYO: Add
    garbage collector.", we waited for close() before kfree(). Thus, elements to be
    kfree()d were queued up using tomoyo_gc_list list.

    But it turned out that tomoyo_element_linked_by_gc() tends to choke garbage
    collector when certain pattern of entries are queued.

    Since garbage collector is no longer waiting for close() since commit 2e503bbb
    "TOMOYO: Fix lockdep warning.", we can remove tomoyo_gc_list list and
    tomoyo_element_linked_by_gc() by doing sequential processing.

    Signed-off-by: Tetsuo Handa
    Signed-off-by: James Morris

    Tetsuo Handa
     

19 Sep, 2011

1 commit

  • I got an opinion that it is difficult to use exception policy's domain
    transition control directives because they need to match the pathname specified
    to "file execute" directives. For example, if "file execute /bin/\*\-ls\-cat"
    is given, corresponding domain transition control directive needs to be like
    "no_keep_domain /bin/\*\-ls\-cat from any".

    If we can specify like below, it will become more convenient.

    file execute /bin/ls keep exec.realpath="/bin/ls" exec.argv[0]="ls"
    file execute /bin/cat keep exec.realpath="/bin/cat" exec.argv[0]="cat"
    file execute /bin/\*\-ls\-cat child
    file execute /usr/sbin/httpd exec.realpath="/usr/sbin/httpd" exec.argv[0]="/usr/sbin/httpd"

    In above examples, "keep" works as if keep_domain is specified, "child" works
    as if "no_reset_domain" and "no_initialize_domain" and "no_keep_domain" are
    specified, "" causes domain transition to domain upon
    successful execve() operation.

    Moreover, we can also allow transition to different domains based on conditions
    like below example.

    /usr/sbin/sshd
    file execute /bin/bash /usr/sbin/sshd //batch-session exec.argc=2 exec.argv[1]="-c"
    file execute /bin/bash /usr/sbin/sshd //root-session task.uid=0
    file execute /bin/bash /usr/sbin/sshd //nonroot-session task.uid!=0

    Signed-off-by: Tetsuo Handa
    Signed-off-by: James Morris

    Tetsuo Handa
     

14 Sep, 2011

1 commit


11 Jul, 2011

4 commits