Eric Lee / smarc-fsl-linux-kernel

11 Oct, 2016

1 commit

  • 101105b17   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ... Browse Code »

    Pull more vfs updates from Al Viro:
    ">rename2() work from Miklos + current_time() from Deepa"

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
    fs: Replace current_fs_time() with current_time()
    fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps
    fs: Replace CURRENT_TIME with current_time() for inode timestamps
    fs: proc: Delete inode time initializations in proc_alloc_inode()
    vfs: Add current_time() api
    vfs: add note about i_op->rename changes to porting
    fs: rename "rename2" i_op to "rename"
    vfs: remove unused i_op->rename
    fs: make remaining filesystems use .rename2
    libfs: support RENAME_NOREPLACE in simple_rename()
    fs: support RENAME_NOREPLACE for local filesystems
    ncpfs: fix unused variable warning

    Linus Torvalds
     

28 Sep, 2016

1 commit

  • 02027d42c   fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps ... Browse Code »

    CURRENT_TIME_SEC is not y2038 safe. current_time() will
    be transitioned to use 64 bit time along with vfs in a
    separate patch.
    There is no plan to transistion CURRENT_TIME_SEC to use
    y2038 safe time interfaces.

    current_time() will also be extended to use superblock
    range checking parameters when range checking is introduced.

    This works because alloc_super() fills in the the s_time_gran
    in super block to NSEC_PER_SEC.

    Signed-off-by: Deepa Dinamani
    Acked-by: Jan Kara
    Signed-off-by: Al Viro

    Deepa Dinamani
     

22 Sep, 2016

1 commit

  • 073931017   posix_acl: Clear SGID bit when setting file permissions ... Browse Code »

    When file permissions are modified via chmod(2) and the user is not in
    the owning group or capable of CAP_FSETID, the setgid bit is cleared in
    inode_change_ok(). Setting a POSIX ACL via setxattr(2) sets the file
    permissions as well as the new ACL, but doesn't clear the setgid bit in
    a similar way; this allows to bypass the check in chmod(2). Fix that.

    References: CVE-2016-7097
    Reviewed-by: Christoph Hellwig
    Reviewed-by: Jeff Layton
    Signed-off-by: Jan Kara
    Signed-off-by: Andreas Gruenbacher

    Jan Kara
     

31 Mar, 2016

1 commit

  • b8a7a3a66   posix_acl: Inode acl caching fixes ... Browse Code »

    When get_acl() is called for an inode whose ACL is not cached yet, the
    get_acl inode operation is called to fetch the ACL from the filesystem.
    The inode operation is responsible for updating the cached acl with
    set_cached_acl(). This is done without locking at the VFS level, so
    another task can call set_cached_acl() or forget_cached_acl() before the
    get_acl inode operation gets to calling set_cached_acl(), and then
    get_acl's call to set_cached_acl() results in caching an outdate ACL.

    Prevent this from happening by setting the cached ACL pointer to a
    task-specific sentinel value before calling the get_acl inode operation.
    Move the responsibility for updating the cached ACL from the get_acl
    inode operations to get_acl(). There, only set the cached ACL if the
    sentinel value hasn't changed.

    The sentinel values are chosen to have odd values. Likewise, the value
    of ACL_NOT_CACHED is odd. In contrast, ACL object pointers always have
    an even value (ACLs are aligned in memory). This allows to distinguish
    uncached ACLs values from ACL objects.

    In addition, switch from guarding inode->i_acl and inode->i_default_acl
    upates by the inode->i_lock spinlock to using xchg() and cmpxchg().

    Filesystems that do not want ACLs returned from their get_acl inode
    operations to be cached must call forget_cached_acl() to prevent the VFS
    from doing so.

    (Patch written by Al Viro and Andreas Gruenbacher.)

    Signed-off-by: Andreas Gruenbacher
    Signed-off-by: Al Viro

    Andreas Gruenbacher
     

03 Jul, 2014

1 commit

26 Jan, 2014

3 commits

21 Sep, 2012

1 commit

18 Sep, 2012

1 commit

  • 5f3a4a28e   userns: Pass a userns parameter into posix_acl_to_xattr and posix_acl_from_xattr ... Browse Code »

    - Pass the user namespace the uid and gid values in the xattr are stored
    in into posix_acl_from_xattr.

    - Pass the user namespace kuid and kgid values should be converted into
    when storing uid and gid values in an xattr in posix_acl_to_xattr.

    - Modify all callers of posix_acl_from_xattr and posix_acl_to_xattr to
    pass in &init_user_ns.

    In the short term this change is not strictly needed but it makes the
    code clearer. In the longer term this change is necessary to be able to
    mount filesystems outside of the initial user namespace that natively
    store posix acls in the linux xattr format.

    Cc: Theodore Tso
    Cc: Andrew Morton
    Cc: Andreas Dilger
    Cc: Jan Kara
    Cc: Al Viro
    Signed-off-by: "Eric W. Biederman"

    Eric W. Biederman
     

27 Mar, 2012

1 commit

01 Aug, 2011

2 commits

26 Jul, 2011

4 commits

  • 4e34e719e   fs: take the ACL checks to common code ... Browse Code »

    Replace the ->check_acl method with a ->get_acl method that simply reads an
    ACL from disk after having a cache miss. This means we can replace the ACL
    checking boilerplate code with a single implementation in namei.c.

    Signed-off-by: Christoph Hellwig
    Signed-off-by: Al Viro

    Christoph Hellwig
     
  • 826cae2f2   kill boilerplates around posix_acl_create_masq() ... Browse Code »

    new helper: posix_acl_create(&acl, gfp, mode_p). Replaces acl with
    modified clone, on failure releases acl and replaces with NULL.
    Returns 0 or -ve on error. All callers of posix_acl_create_masq()
    switched.

    Signed-off-by: Al Viro

    Al Viro
     
  • bc26ab5f6   kill boilerplate around posix_acl_chmod_masq() ... Browse Code »

    new helper: posix_acl_chmod(&acl, gfp, mode). Replaces acl with modified
    clone or with NULL if that has failed; returns 0 or -ve on error. All
    callers of posix_acl_chmod_masq() switched to that - they'd been doing
    exactly the same thing.

    Signed-off-by: Al Viro

    Al Viro
     
  • e77819e57   vfs: move ACL cache lookup into generic code ... Browse Code »

    This moves logic for checking the cached ACL values from low-level
    filesystems into generic code. The end result is a streamlined ACL
    check that doesn't need to load the inode->i_op->check_acl pointer at
    all for the common cached case.

    The filesystems also don't need to check for a non-blocking RCU walk
    case in their acl_check() functions, because that is all handled at a
    VFS layer.

    Signed-off-by: Linus Torvalds
    Signed-off-by: Al Viro

    Linus Torvalds
     

24 Jul, 2011

1 commit

  • 963945bf9   fix jffs2 ACLs on big-endian with 16bit mode_t ... Browse Code »

    casting int * to mode_t * is not a good thing - on a *lot* of big-endian
    architectures mode_t happens to be smaller than int and there it breaks
    quite spectaculary...

    Fucked-up-by: commit cfc8dc6f6f69ede939e09c2af06a01adee577285
    Signed-off-by: Al Viro

    Al Viro
     

20 Jul, 2011

2 commits

24 Mar, 2011

1 commit

07 Jan, 2011

1 commit

08 Jun, 2010

1 commit

  • 3975d1676   Merge git://git.infradead.org/~dwmw2/mtd-2.6.35 ... Browse Code »

    * git://git.infradead.org/~dwmw2/mtd-2.6.35:
    jffs2: update ctime when changing the file's permission by setfacl
    jffs2: Fix NFS race by using insert_inode_locked()
    jffs2: Fix in-core inode leaks on error paths
    mtd: Fix NAND submenu
    mtd/r852: update card detect early.
    mtd/r852: Fixes in case of DMA timeout
    mtd/r852: register IRQ as last step
    drivers/mtd: Use memdup_user
    docbook: make mtd nand module init static

    Linus Torvalds
     

06 Jun, 2010

1 commit

22 May, 2010

1 commit

17 Dec, 2009

1 commit

  • 431547b3c   sanitize xattr handler prototypes ... Browse Code »

    Add a flags argument to struct xattr_handler and pass it to all xattr
    handler methods. This allows using the same methods for multiple
    handlers, e.g. for the ACL methods which perform exactly the same action
    for the access and default ACLs, just using a different underlying
    attribute. With a little more groundwork it'll also allow sharing the
    methods for the regular user/trusted/secure handlers in extN, ocfs2 and
    jffs2 like it's already done for xfs in this patch.

    Also change the inode argument to the handlers to a dentry to allow
    using the handlers mechnism for filesystems that require it later,
    e.g. cifs.

    [with GFS2 bits updated by Steven Whitehouse ]

    Signed-off-by: Christoph Hellwig
    Reviewed-by: James Morris
    Acked-by: Joel Becker
    Signed-off-by: Al Viro

    Christoph Hellwig
     

09 Sep, 2009

1 commit

25 Jun, 2009

1 commit

24 Jun, 2009

2 commits

07 Apr, 2009

1 commit

  • 22ae77bc7   Merge git://git.infradead.org/mtd-2.6 ... Browse Code »

    * git://git.infradead.org/mtd-2.6: (53 commits)
    [MTD] struct device - replace bus_id with dev_name(), dev_set_name()
    [MTD] [NOR] Fixup for Numonyx M29W128 chips
    [MTD] mtdpart: Make ecc_stats more realistic.
    powerpc/85xx: TQM8548: Update DTS file for multi-chip support
    powerpc: NAND: FSL UPM: document new bindings
    [MTD] [NAND] FSL-UPM: Add wait flags to support board/chip specific delays
    [MTD] [NAND] FSL-UPM: add multi chip support
    [MTD] [NOR] Add device parent info to physmap_of
    [MTD] [NAND] Add support for NAND on the Socrates board
    [MTD] [NAND] Add support for 4KiB pages.
    [MTD] sysfs support should not depend on CONFIG_PROC_FS
    [MTD] [NAND] Add parent info for CAFÉ controller
    [MTD] support driver model updates
    [MTD] driver model updates (part 2)
    [MTD] driver model updates
    [MTD] [NAND] move gen_nand's probe function to .devinit.text
    [MTD] [MAPS] move sa1100 flash's probe function to .devinit.text
    [MTD] fix use after free in register_mtd_blktrans
    [MTD] [MAPS] Drop now unused sharpsl-flash map
    [MTD] ofpart: Check name property to determine partition nodes.
    ...

    Manually fix trivial conflict in drivers/mtd/maps/Makefile

    Linus Torvalds
     

01 Apr, 2009

1 commit

20 Mar, 2009

1 commit

27 Jul, 2008

1 commit

  • e6305c43e   [PATCH] sanitize ->permission() prototype ... Browse Code »

    * kill nameidata * argument; map the 3 bits in ->flags anybody cares
    about to new MAY_... ones and pass with the mask.
    * kill redundant gfs2_iop_permission()
    * sanitize ecryptfs_permission()
    * fix remaining places where ->permission() instances might barf on new
    MAY_... found in mask.

    The obvious next target in that direction is permission(9)

    folded fix for nfs_permission() breakage from Miklos Szeredi

    Signed-off-by: Al Viro

    Al Viro
     

08 Jan, 2008

1 commit

  • 36f97bc61   [JFFS2] Add missing call to posix_acl_release ... Browse Code »

    posix_acl_clone does a memory allocation and sets a reference count, so
    posix_acl_release is needed afterwards to free it.

    The problem was fixed using the following semantic patch.
    (http://www.emn.fr/x-info/coccinelle/)

    //
    @@
    type T;
    identifier E;
    expression E1, E2;
    int ret;
    statement S;
    @@

    T E;

    //

    Signed-off-by: Julia Lawall
    Acked-by: KaiGai Kohei
    Signed-off-by: David Woodhouse

    Julia Lawall
     

06 Nov, 2007

1 commit

27 Oct, 2007

1 commit

20 Oct, 2007

1 commit

  • cfc8dc6f6   [JFFS2] Tidy up fix for ACL/permissions problem. ... Browse Code »

    [In commit 9ed437c50d89eabae763dd422579f73fdebf288d we fixed a problem
    with standard permissions on newly-created inodes, when POSIX ACLs are
    enabled. This cleans it up...]

    The attached patch separate jffs2_init_acl() into two parts.

    The one is jffs2_init_acl_pre() called from jffs2_new_inode().
    It compute ACL oriented inode->i_mode bits, and allocate in-memory ACL
    objects associated with the new inode just before when inode meta
    infomation is written to the medium.

    The other is jffs2_init_acl_post() called from jffs2_symlink(),
    jffs2_mkdir(), jffs2_mknod() and jffs2_do_create().
    It actually writes in-memory ACL objects into the medium next to
    the success of writing meta-information.

    In the current implementation, we have to write a same inode meta
    infomation twice when inode->i_mode is updated by the default ACL.
    However, we can avoid the behavior by putting an updated i_mode
    before it is written at first, as jffs2_init_acl_pre() doing.

    Signed-off-by: KaiGai Kohei
    Signed-off-by: David Woodhouse

    KaiGai Kohei
     

22 Aug, 2007

1 commit

  • 9ed437c50   [JFFS2] Fix ACL vs. mode handling. ... Browse Code »

    When POSIX ACL support was enabled, we weren't writing correct
    legacy modes to the medium on inode creation, or when the ACL was set.
    This meant that the permissions would be incorrect after the file system
    was remounted.

    Signed-off-by: David Woodhouse

    David Woodhouse
     

18 Jul, 2007

1 commit

  • 3bd858ab1   Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid check ... Browse Code »

    Introduce is_owner_or_cap() macro in fs.h, and convert over relevant
    users to it. This is done because we want to avoid bugs in the future
    where we check for only effective fsuid of the current task against a
    file's owning uid, without simultaneously checking for CAP_FOWNER as
    well, thus violating its semantics.
    [ XFS uses special macros and structures, and in general looked ...
    untouchable, so we leave it alone -- but it has been looked over. ]

    The (current->fsuid != inode->i_uid) check in generic_permission() and
    exec_permission_lite() is left alone, because those operations are
    covered by CAP_DAC_OVERRIDE and CAP_DAC_READ_SEARCH. Similarly operations
    falling under the purview of CAP_CHOWN and CAP_LEASE are also left alone.

    Signed-off-by: Satyam Sharma
    Cc: Al Viro
    Acked-by: Serge E. Hallyn
    Signed-off-by: Linus Torvalds

    Satyam Sharma