Re: [PATCH] rust_binder: use a u64 stride when cleaning up the offsets array

[kernel test robot <lkp@intel.com>]

Hi Hyunwoo,

kernel test robot noticed the following build errors:

[auto build test ERROR on staging/staging-testing]
[also build test ERROR on staging/staging-next staging/staging-linus linus/master v7.1-rc5 next-20260528]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Hyunwoo-Kim/rust_binder-use-a-u64-stride-when-cleaning-up-the-offsets-array/20260529-092450
base:   staging/staging-testing
patch link:    https://lore.kernel.org/r/ahjpn-3WQTywTdyj%40v4bel
patch subject: [PATCH] rust_binder: use a u64 stride when cleaning up the offsets array
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20260529/202605290823.20jvlxFD-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260529/202605290823.20jvlxFD-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605290823.20jvlxFD-lkp@intel.com/

All errors (new ones prefixed by >>):

   PATH=/opt/cross/clang-20/bin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
   INFO PATH=/opt/cross/rustc-1.88.0-bindgen-0.72.1/cargo/bin:/opt/cross/clang-20/bin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
   /usr/bin/timeout -k 100 12h /usr/bin/make KCFLAGS=\ -fno-crash-diagnostics\ -Wno-error=return-type\ -Wreturn-type\ -funsigned-char\ -Wundef\ -falign-functions=64 W=1 --keep-going LLVM=1 -j384 -C source O=/kbuild/obj/consumer/x86_64-rhel-9.4-rust ARCH=x86_64 SHELL=/bin/bash rustfmtcheck 
   make: Entering directory '/kbuild/src'
   make[1]: Entering directory '/kbuild/obj/consumer/x86_64-rhel-9.4-rust'
>> Diff in drivers/android/binder/allocation.rs:412:
        }
    
        fn cleanup_object(&self, index_offset: usize) -> Result {
   -        let offset: usize = self.alloc.read::<u64>(index_offset)?.try_into().map_err(|_| EINVAL)?;
   +        let offset: usize = self
   +            .alloc
   +            .read::<u64>(index_offset)?
   +            .try_into()
   +            .map_err(|_| EINVAL)?;
            let header = self.read::<BinderObjectHeader>(offset)?;
            match header.type_ {
                BINDER_TYPE_WEAK_BINDER | BINDER_TYPE_BINDER => {
>> Diff in drivers/android/binder/allocation.rs:412:
        }
    
        fn cleanup_object(&self, index_offset: usize) -> Result {
   -        let offset: usize = self.alloc.read::<u64>(index_offset)?.try_into().map_err(|_| EINVAL)?;
   +        let offset: usize = self
   +            .alloc
   +            .read::<u64>(index_offset)?
   +            .try_into()
   +            .map_err(|_| EINVAL)?;
            let header = self.read::<BinderObjectHeader>(offset)?;
            match header.type_ {
                BINDER_TYPE_WEAK_BINDER | BINDER_TYPE_BINDER => {
   make[1]: Leaving directory '/kbuild/obj/consumer/x86_64-rhel-9.4-rust'
   make: *** [Makefile:248: __sub-make] Error 2
   make: Target 'rustfmtcheck' not remade because of errors.
   make[2]: *** [Makefile:1954: rustfmt] Error 123
   make[2]: Target 'rustfmtcheck' not remade because of errors.
   make: Leaving directory '/kbuild/src'
   make[1]: *** [Makefile:248: __sub-make] Error 2
   make[1]: Target 'rustfmtcheck' not remade because of errors.

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