https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291027
Bug ID: 291027
Summary: mount(8) may produce invalid fstab(5) output
Product: Base System
Version: 14.3-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
Created attachment 265421
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=265421&action=edit
Suggested fix
Background:
fstab(5) expects the first two fields (fs_spec and fs_file i.e. the device and
the mountpoint) to escape spaces and tabs. The contents of these two fields are
decoded using strunvis(3).
Problem:
When calling mount(8) with -p (to print mount information in fstab(5) format),
spaces and tabs in the first two fields are not escaped and can thus not be
distinguished from field separators.
Solution:
Use vis(3) to encode the first two fields when producing output in fstab(5)
format (i.e. when called with -p).
How to reproduce:
# zfs create 'tank/test with spaces'
# mount -p
zroot/test with spaces /zroot/test with spaces zfs rw,noatime,nfsv4acls
0 0
Expected:
# zfs create 'tank/test with spaces'
# mount -p
tank/test\swith\sspaces /zroot/test\swith\sspaces zfs rw,noatime,nfsv4acls
0 0
Please see the attached diff for a possible fix.
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