tests: add very long mount line to libmount mtab

Very long mount lines from the kernel (either from escaping or from giant
option lists) could exceed BUFSIZ, leading to parsing failures. This
adds a test for the condition.

Signed-off-by: Kees Cook <keescook@chromium.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/tests/ts/libmount/files/mtab b/tests/ts/libmount/files/mtab
index 2de255bd3..93bc90e60 100644
--- a/tests/ts/libmount/files/mtab
+++ b/tests/ts/libmount/files/mtab
@@ -9,3 +9,4 @@ none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
 fusectl /sys/fs/fuse/connections fusectl rw 0 0
 gvfs-fuse-daemon /home/kzak/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,user=kzak 0 0
 sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0
+none 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overlay rw,relatime,lowerdir=lower,upperdir=upper,workdir=work 0 0