From: Charndeep Grewal <[email protected]> Restrict log flushing to those in the logs group, or anyone with CAP_SYSLOG.
Cc: Android Kernel Team <[email protected]> Cc: Charndeep Grewal <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Signed-off-by: Charndeep Grewal <[email protected]> Signed-off-by: John Stultz <[email protected]> --- drivers/staging/android/logger.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/staging/android/logger.c b/drivers/staging/android/logger.c index cfa6061..b14a557 100644 --- a/drivers/staging/android/logger.c +++ b/drivers/staging/android/logger.c @@ -695,6 +695,11 @@ static long logger_ioctl(struct file *file, unsigned int cmd, unsigned long arg) ret = -EBADF; break; } + if (!(in_egroup_p(file->f_dentry->d_inode->i_gid) || + capable(CAP_SYSLOG))) { + ret = -EPERM; + break; + } list_for_each_entry(reader, &log->readers, list) reader->r_off = log->w_off; log->head = log->w_off; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
