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| author |   Michael Schaller <misch@google.com> | 2020-09-25 09:45:02 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-01 12:45:37 +0100 |
| commit | c328793e21fb5ff72775476fdf184931a2671e56 (patch) | |
| tree | 30b3956b5c9efc46c60068401c83a6780d3f9c04 | |
| parent | x86/copy_mc: Introduce copy_mc_enhanced_fast_string() (diff) | |
| download | linux-stable-c328793e21fb5ff72775476fdf184931a2671e56.tar.xz linux-stable-c328793e21fb5ff72775476fdf184931a2671e56.zip | |
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>
| -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 28bb5689333a..15880a68faad 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) |