On Mon, Nov 07, 2016 at 12:51:52PM +0000, Riku Voipio wrote: > On Sun, Nov 06, 2016 at 03:59:12PM +0000, James Cowgill wrote: > > On Thu, 3 Nov 2016 13:15:47 +0300 Michael Tokarev <m...@tls.msk.ru> wrote: > > > 03.11.2016 12:46, Toby Speight wrote: > > > > I was able to work around this issue by hand-editing the postinst it to > > > > add > > > > '|mips*' to the end of $omit (luckily, I don't need MIPS emulation on my > > > > systems). > > > > > > > > The one thing that stands out about the MIPS registration is that the > > > > magic > > > > and mask are much longer than for other systems - is it possible that > > > > the > > > > kernel can't handle such long patterns? If so, can this be detected and > > > > avoided? > > > > > > This change was introduced very recently, see #829243. But it works fine > > > on my system. I wonder if 3.16 kernel is unable to process that binfmt > > > while 4.1+ can handle it... Oh well. > > > > Looks like this kernel commit added support for longer formats: > > bbaecc088245e840e59a5abe23d69cf7748b3c88 > > > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/fs/binfmt_misc.c?id=bbaecc088245e840e59a5abe23d69cf7748b3c88 > > > > This is probably what causes this. The above commit exists only in 3.18+ > > The attached patch only registers the new longer patterns on 3.18+. I still > need another round for the patch. The kernel version check requires bash, and > the naive >> to > change doesn't actually make the script a bash script. But > before I invest more time into this I'd like to know if others agree this > change > is the right way. > > The other option is to revert the change from #829243 until a better way to > handle the change is done.
Something needs to be done about this in testing. Upgrades from Jessie to Stretch are currently broken, since those will be running a 3.16 kernel when the upgraded version's postinst script is run. I verified this on a clean, minimal Jessie install (nothing selected in tasksel): 1. Install qemu-user-static 2. Change APT sources to stretch 3. apt-get update 4. apt-get upgrade - fails Regards, James
