diff options
| author | Michael Schaller <misch@google.com> | 2020-09-25 09:45:02 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-01 12:01:02 +0100 |
| commit | 8e1b40e57dca742575b975b5e8a595021e78f3b3 (patch) | |
| tree | 9046d13e94100b08946a77fa5e825e9a5c7c6b64 /fs | |
| parent | c3019695f1d8e0b88a1dc188f5554ab550dd7320 (diff) | |
efivarfs: Replace invalid slashes with exclamation marks in dentries.
commit 336af6a4686d885a067ecea8c3c3dd129ba4fc75 upstream.
Without this patch efivarfs_alloc_dentry creates dentries with slashes in
their name if the respective EFI variable has slashes in its name. This in
turn causes EIO on getdents64, which prevents a complete directory listing
of /sys/firmware/efi/efivars/.
This patch replaces the invalid shlashes with exclamation marks like
kobject_set_name_vargs does for /sys/firmware/efi/vars/ to have consistently
named dentries under /sys/firmware/efi/vars/ and /sys/firmware/efi/efivars/.
Signed-off-by: Michael Schaller <misch@google.com>
Link: https://lore.kernel.org/r/20200925074502.150448-1-misch@google.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/efivarfs/super.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c index fa4f6447ddad..9760a52800b4 100644 --- a/fs/efivarfs/super.c +++ b/fs/efivarfs/super.c @@ -141,6 +141,9 @@ static int efivarfs_callback(efi_char16_t *name16, efi_guid_t vendor, name[len + EFI_VARIABLE_GUID_LEN+1] = '\0'; + /* replace invalid slashes like kobject_set_name_vargs does for /sys/firmware/efi/vars. */ + strreplace(name, '/', '!'); + inode = efivarfs_get_inode(sb, d_inode(root), S_IFREG | 0644, 0, is_removable); if (!inode) |