Am 17.11.2015 um 20:21 schrieb Seth Forshee: > On Tue, Nov 17, 2015 at 08:12:31PM +0100, Richard Weinberger wrote: >> On Tue, Nov 17, 2015 at 7:34 PM, Seth Forshee >> <seth.forshee@xxxxxxxxxxxxx> wrote: >>> On Tue, Nov 17, 2015 at 05:55:06PM +0000, Al Viro wrote: >>>> On Tue, Nov 17, 2015 at 11:25:51AM -0600, Seth Forshee wrote: >>>> >>>>> Shortly after that I plan to follow with support for ext4. I've been >>>>> fuzzing ext4 for a while now and it has held up well, and I'm currently >>>>> working on hand-crafted attacks. Ted has commented privately (to others, >>>>> not to me personally) that he will fix bugs for such attacks, though I >>>>> haven't seen any public comments to that effect. >>>> >>>> _Static_ attacks, or change-image-under-mounted-fs attacks? >>> >>> Right now only static attacks, change-image-under-mounted-fs attacks >>> will be next. >> >> Do we *really* need to enable unprivileged mounting of kernel filesystems? >> What about just enabling fuse and implement ext4 and friends as fuse >> filesystems? >> Using the approaching Linux Kernel Libary[1] this is easy. > > I haven't looked at this project, but I'm guessing that programs must be > written specifically to make use of it? I.e. you can't just use the > mount syscall, and thus all existing software still doesn't work? You can easy bridge fuse and the LKL, I did already a hacky PoC. Worked nicely. Octavian's tree has some nice examples, and AFAIK he is currently working on a "mount any kernel fs via fuse" tool. Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
