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    Subject[ 17/68] regset: Return -EFAULT, not -EIO, on host-side memory fault
    3.0-stable review patch.  If anyone has any objections, please let me know.


    From: "H. Peter Anvin" <>

    commit 5189fa19a4b2b4c3bec37c3a019d446148827717 upstream.

    There is only one error code to return for a bad user-space buffer
    pointer passed to a system call in the same address space as the
    system call is executed, and that is EFAULT. Furthermore, the
    low-level access routines, which catch most of the faults, return
    EFAULT already.

    Signed-off-by: H. Peter Anvin <>
    Reviewed-by: Oleg Nesterov <>
    Acked-by: Roland McGrath <>
    Signed-off-by: Linus Torvalds <>
    Signed-off-by: Greg Kroah-Hartman <>

    include/linux/regset.h | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    --- a/include/linux/regset.h
    +++ b/include/linux/regset.h
    @@ -339,7 +339,7 @@ static inline int copy_regset_to_user(st
    return -EOPNOTSUPP;

    if (!access_ok(VERIFY_WRITE, data, size))
    - return -EIO;
    + return -EFAULT;

    return regset->get(target, regset, offset, size, NULL, data);
    @@ -365,7 +365,7 @@ static inline int copy_regset_from_user(
    return -EOPNOTSUPP;

    if (!access_ok(VERIFY_READ, data, size))
    - return -EIO;
    + return -EFAULT;

    return regset->set(target, regset, offset, size, NULL, data);

     \ /
      Last update: 2012-03-09 21:09    [W:0.031 / U:3.640 seconds]
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