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Diffstat (limited to 'results/classifier/deepseek-2-tmp/output/network/833')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/output/network/833 | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/results/classifier/deepseek-2-tmp/output/network/833 b/results/classifier/deepseek-2-tmp/output/network/833 deleted file mode 100644 index 6d0fcb932..000000000 --- a/results/classifier/deepseek-2-tmp/output/network/833 +++ /dev/null @@ -1,43 +0,0 @@ - -linux-user: sendmsg fails to send messages without iov -Description of problem: -When run via qemu `sendmsg` fails to send messages which contain a zero length `iov` but _do_ contain ancillary data. This works fine on plain Linux. - -A practical example: the `ell` library relies on this for setting the IV on a kernel crypto (`AF_ALG`) socket: https://git.kernel.org/pub/scm/libs/ell/ell.git/tree/ell/cipher.c#n526 - -A message without data but only ancillary data is used to set the IV. -Steps to reproduce: -See [qemu_ancillary.c](/uploads/84ee20aa3b9178022847d6cd7fcf0048/qemu_ancillary.c) for a self contained testcase which sends two mesages (one with `msg_iovlen=0`, one with `msg_iovlen=1`). - -(Test case is to be considered GPL, as I've copied bits from `ell`) - -Native: -``` -$ strace -esendmsg ./a.out -sendmsg(6, {msg_name=NULL, msg_namelen=0, msg_iov=NULL, msg_iovlen=0, msg_control=[{cmsg_len=36, cmsg_level=SOL_ALG, cmsg_type=0x2}], msg_controllen=40, msg_flags=0}, 0) = 0 -sendmsg(6, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=16}], msg_iovlen=1, msg_control=[{cmsg_len=36, cmsg_level=SOL_ALG, cmsg_type=0x2}], msg_controllen=40, msg_flags=0}, 0) = 16 -+++ exited with 0 +++ -``` - - -Qemu (observe missing sendmsg call): -``` -$ strace -esendmsg ~/debug/qemu/build/qemu-x86_64 ./a.out -sendmsg(6, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=16}], msg_iovlen=1, msg_control=[{cmsg_len=36, cmsg_level=SOL_ALG, cmsg_type=0x2}], msg_controllen=40, msg_flags=0}, 0) = 16 -+++ exited with 0 +++ -``` - -For a practical reproducer: - -1. Compile and run `ell`'s `test-cipher` test case: - -``` -$ ~/debug/qemu/build/qemu-x86_64 ./unit/test-cipher -TEST: unsupported -TEST: aes -TEST: aes_ctr -test-cipher: unit/test-cipher.c:102: test_aes_ctr: Assertion `!r' failed. -Aborted (core dumped) -``` - -A strace will look similar. |