diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-09-06 16:34:28 +0000 |
|---|---|---|
| committer | Dmitry Vyukov <dvyukov@google.com> | 2022-09-08 10:47:48 +0200 |
| commit | f30274687d34e8d50307008f4c9989eaef077696 (patch) | |
| tree | 4f6feb9ae1c7ddf2ab9488db7232d4738d491c7f /tools/create-buildroot-image.sh | |
| parent | 435aeef7d61a4cff6e6d918216b9124a6d44e061 (diff) | |
tools/create-buildroot-image.sh: configure sftp subsystem
create-buildroot-image.sh creates a minimal sshd_config, which does not
configure sftp. Thus, if the initial scp to setup syz-fuzzer uses sftp,
it fails with the error below, and syz-manager never starts fuzzing.
2022/09/06 16:03:44 failed to copy binary: failed to run
["scp" "-P" "14125" ... "/home/ec2-user/syzkaller/bin/linux_amd64/syz-fuzzer"
"root@localhost:/syz-fuzzer"]: exit status 255
Warning: Permanently added '[localhost]:14125' (ED25519) to the list of known hosts.
subsystem request failed on channel 0
Connection closed
We can see sftp throws the same sequences by manually running scp in
verbose mode.
$ scp -v -P 14125 /home/ec2-user/syzkaller/bin/linux_amd64/syz-fuzzer root@localhost:/syz-fuzzer
Executing: program /usr/bin/ssh host localhost, user root, command sftp
...
debug1: Connecting to localhost [localhost] port 14125.
debug1: Connection established.
...
debug1: Sending subsystem: sftp
subsystem request failed on channel 0
Connection closed
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Diffstat (limited to 'tools/create-buildroot-image.sh')
| -rwxr-xr-x | tools/create-buildroot-image.sh | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/create-buildroot-image.sh b/tools/create-buildroot-image.sh index c2c4aa245..1de0a66a8 100755 --- a/tools/create-buildroot-image.sh +++ b/tools/create-buildroot-image.sh @@ -180,6 +180,7 @@ PermitRootLogin yes PasswordAuthentication yes PermitEmptyPasswords yes ClientAliveInterval 420 +Subsystem sftp /usr/libexec/sftp-server EOF # Generate sshd host keys. |