The patch titled
Subject: proc: reject "." and ".." as filenames
has been removed from the -mm tree. Its filename was
proc-reject-and-as-filenames.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Subject: proc: reject "." and ".." as filenames
Various subsystems can create files and directories in /proc with names
directly controlled by userspace.
Which means "/", "." and ".." are no-no.
"/" split is already taken care of, do the other 2 prohibited names.
Link: http://lkml.kernel.org/r/20180310001223.GB12443@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Acked-by: Florian Westphal <fw@xxxxxxxxx>
Cc: Eric Dumazet <eric.dumazet@xxxxxxxxx>
Cc: Cong Wang <xiyou.wangcong@xxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/generic.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff -puN fs/proc/generic.c~proc-reject-and-as-filenames fs/proc/generic.c
--- a/fs/proc/generic.c~proc-reject-and-as-filenames
+++ a/fs/proc/generic.c
@@ -366,6 +366,14 @@ static struct proc_dir_entry *__proc_cre
WARN(1, "name len %u\n", qstr.len);
return NULL;
}
+ if (qstr.len == 1 && fn[0] == '.') {
+ WARN(1, "name '.'\n");
+ return NULL;
+ }
+ if (qstr.len == 2 && fn[0] == '.' && fn[1] == '.') {
+ WARN(1, "name '..'\n");
+ return NULL;
+ }
if (*parent == &proc_root && name_to_int(&qstr) != ~0U) {
WARN(1, "create '/proc/%s' by hand\n", qstr.name);
return NULL;
_
Patches currently in -mm which might be from adobriyan@xxxxxxxxx are
proc-revalidate-misc-dentries.patch
coredump-fix-spam-with-zero-vma-process.patch
seq_file-delete-small-value-optimization.patch
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