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c923f6ac3b
This is a fix for https://github.com/docker/for-linux/issues/1012. The code was not considering that C strings are NULL-terminated so we need to leave one extra byte. Without this fix, the testcase in https://github.com/docker/for-linux/issues/1012 fails with ``` Step 61/1001 : RUN echo 60 > 60 ---> Running in dde85ac3b1e3 Removing intermediate container dde85ac3b1e3 ---> 80a12a18a241 Step 62/1001 : RUN echo 61 > 61 error creating overlay mount to /23456789112345678921234/overlay2/d368abcc97d6c6ebcf23fa71225e2011d095295d5d8c9b31d6810bea748bdf07-init/merged: no such file or directory ``` with the output of `dmesg -T` as: ``` [Sat Dec 19 02:35:40 2020] overlayfs: failed to resolve '/23456789112345678921234/overlay2/89e435a1b24583c463abb73e8abfad8bf8a88312ef8253455390c5fa0a765517-init/wor': -2 ``` with this fix, you get the expected: ``` Step 126/1001 : RUN echo 125 > 125 ---> Running in 2f2e56da89e0 max depth exceeded ``` Signed-off-by: Oscar Bonilla <6f6231@gmail.com>