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charset="utf-8" In mptcp_connect.sh we are missing something like "oflag=3Dappend" because this will write "${rem}" bytes at the beginning of the file where there is already some random bytes. It should write that at the end. This patch adds this missing 'oflag=3Dappend' flag for 'dd' command in make_file(). Suggested-by: Matthieu Baerts Signed-off-by: Geliang Tang --- tools/testing/selftests/net/mptcp/mptcp_connect.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.sh b/tools/tes= ting/selftests/net/mptcp/mptcp_connect.sh index 4dfbbde6df77..f00942cc23c7 100755 --- a/tools/testing/selftests/net/mptcp/mptcp_connect.sh +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.sh @@ -593,7 +593,7 @@ make_file() rem=3D$((SIZE - (ksize * 1024))) =20 dd if=3D/dev/urandom of=3D"$name" bs=3D1024 count=3D$ksize 2> /dev/null - dd if=3D/dev/urandom conv=3Dnotrunc of=3D"$name" bs=3D1 count=3D$rem 2> /= dev/null + dd if=3D/dev/urandom conv=3Dnotrunc of=3D"$name" oflag=3Dappend bs=3D1 co= unt=3D$rem 2> /dev/null echo -e "\nMPTCP_TEST_FILE_END_MARKER" >> "$name" =20 echo "Created $name (size $(du -b "$name")) containing data sent by $who" --=20 2.35.3