Re: [PATCH 3/7] syscalls/fanotify20: Validate incoming FID in FAN_FS_ERROR

[Gabriel Krisman Bertazi <krisman@collabora.com>]

Amir Goldstein <amir73il@gmail.com> writes:

> On Tue, Aug 3, 2021 at 12:47 AM Gabriel Krisman Bertazi
> <krisman@collabora.com> wrote:
>>
>> Verify the FID provided in the event.  If the testcase has a null inode,
>> this is assumed to be a superblock error (i.e. null FH).
>>
>> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
>> ---
>>  .../kernel/syscalls/fanotify/fanotify20.c     | 51 +++++++++++++++++++
>>  1 file changed, 51 insertions(+)
>>
>> diff --git a/testcases/kernel/syscalls/fanotify/fanotify20.c b/testcases/kernel/syscalls/fanotify/fanotify20.c
>> index fd5cfb8744f1..d8d788ae685f 100644
>> --- a/testcases/kernel/syscalls/fanotify/fanotify20.c
>> +++ b/testcases/kernel/syscalls/fanotify/fanotify20.c
>> @@ -40,6 +40,14 @@
>>
>>  #define FAN_EVENT_INFO_TYPE_ERROR      4
>>
>> +#ifndef FILEID_INVALID
>> +#define        FILEID_INVALID          0xff
>> +#endif
>> +
>> +#ifndef FILEID_INO32_GEN
>> +#define FILEID_INO32_GEN       1
>> +#endif
>> +
>>  struct fanotify_event_info_error {
>>         struct fanotify_event_info_header hdr;
>>         __s32 error;
>> @@ -57,6 +65,9 @@ static const struct test_case {
>>         char *name;
>>         int error;
>>         unsigned int error_count;
>> +
>> +       /* inode can be null for superblock errors */
>> +       unsigned int *inode;
>
> Any reason not to use fanotify_fid_t * like fanotify16.c?

No reason other than I didn't notice they existed. Sorry. I will get
this fixed.

-- 
Gabriel Krisman Bertazi