[PATCH] afs_show_devname: escape whitespace in cell or volume names
Matthias Gerstner
matthias.gerstner at suse.de
Fri Nov 4 07:46:40 PDT 2022
To protect userspace from parsing errors due to whitespace in the device
name make sure the variable cell and volume names are escaped
accordingly.
---
fs/afs/super.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 95d713074dc8..d63202f37fc3 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -180,7 +180,12 @@ static int afs_show_devname(struct seq_file *m, struct dentry *root)
break;
}
- seq_printf(m, "%c%s:%s%s", pref, cell->name, volume->name, suf);
+ // [pref][cell]:[volume][suf]
+ seq_putc(m, pref);
+ seq_escape(m, cell->name, " \t\n\\");
+ seq_putc(m, ':');
+ seq_escape(m, volume->name, " \t\n\\");
+ seq_puts(m, suf);
return 0;
}
--
2.37.3
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