On Mon, May 15, 2017 at 07:42:23PM +0000, Alexey Dokuchaev wrote: > On Mon, May 15, 2017 at 10:40:49PM +0300, Konstantin Belousov wrote: > > On Mon, May 15, 2017 at 03:37:42PM -0400, Nikolai Lifanov wrote: > > > On 05/15/2017 15:36, Alexey Dokuchaev wrote: > > > > ... > > > > Would this now allow executing binaries (with or without +x bit) from > > > > filesystems mounted with -o noexec? > > > > > > No: > > > > > > # zfs create -o mountpoint=/mnt -o exec=off tank/TEST > > > # cp /bin/sh /mnt/ > > > # /mnt/sh > > > /mnt/sh: Permission denied. > > > # /libexec/ld-elf.so.1 /mnt/sh > > > /mnt/sh: mmap of data failed: Permission denied > > > > This is due to > > r313967 | kib | 2017-02-19 22:51:04 +0200 (Sun, 19 Feb 2017) | 24 lines > > Apply noexec mount option for mmap(PROT_EXEC). > > Nice, good to know that.
[Replying to random mail in thread] I tried this on an up to date latest Fedora installation: [kostik@sandy ~]$ cp /bin/ls /tmp [kostik@sandy ~]$ chmod a-x /tmp/ls [kostik@sandy ~]$ /lib64/ld-linux-x86-64.so.2 /tmp/ls Dropbox intel tmp work I am not sure about one detail, the /tmp/ls file has some security context on it, but I do not believe that it may affect the outcome of the experiment. Please correct me if I am wrong. _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
