Messages in this thread | | | Date | Mon, 27 Jul 2020 17:05:54 +0100 | From | Al Viro <> | Subject | Re: PROBLEM: cryptsetup fails to unlock drive in 5.8-rc6 (regression) |
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On Thu, Jul 23, 2020 at 11:51:01AM -0400, Nick Bowler wrote: > Hi, > > After installing Linux 5.8-rc6, it seems cryptsetup can no longer > open LUKS volumes. Regardless of the entered passphrase (correct > or otherwise), the result is a very unhelpful "Keyslot open failed." > message. > > On the kernels which fail, I also noticed that the cryptsetup > benchmark command appears to not be able to determine that any > ciphers are available (output at end of message), possibly for > the same reason. > > Bisected to the following commit, which suggests a problem specific > to compat userspace (this is amd64 kernel). I tested both ia32 and > x32 userspace to confirm the problem. Reverting this commit on top > of 5.8-rc6 resolves the issue. > > Looking at strace output the failing syscall appears to be: > > sendmsg(8, {msg_name=NULL, msg_namelen=0, > msg_iov=[{iov_base=..., iov_len=512}], msg_iovlen=1, > msg_control=[{cmsg_len=16, cmsg_level=SOL_ALG, > cmsg_type=0x3}, {cmsg_len=32, cmsg_level=SOL_ALG, > cmsg_type=0x2}], msg_controllen=48, msg_flags=0}, 0) > = -1 EINVAL (Invalid argument)
Huh? Just in case - could you verify that on the kernel with that commit reverted the same sendmsg() succeeds?
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