From: Helge Deller > Sent: 13 February 2022 22:10 > > The put_user(val,ptr) macro wants a pointer in the second parameter, but in > fat_ioctl_filldir() the d_name field references a whole "array of chars". > Usually the compiler automatically converts it and uses a pointer to that > array, but it's more clean to explicitly give the real pointer to where someting > is put, which is in this case the first character of the d_name[] array. That just isn't true. In C both x->char_array and &x->char_array[0] have the same type 'char *'. The 'bug' is caused by put_user() trying to do: __typeof__(ptr) __ptr = ptr; where __typeof__ is returning char[n] not char *. I've tried a few things but can't get __typeof__ to generate a suitable type for both a simple type and array. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
