[REGRESSION] mainline/master: (build) variable 'old_size' is uninitialized when used here [-Werror,-Wuni...

Hello,

New build issue found on mainline/master:

---
 variable 'old_size' is uninitialized when used here [-Werror,-Wuninitialized] in fs/smb/client/cifsfs.o (fs/smb/client/cifsfs.c) [logspec:kbuild,kbuild.compiler.error]
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- dashboard: https://d.kernelci.org/i/maestro:8fef554699226f88449edfc56be31812d3edd327
- giturl: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
- commit HEAD:  4bf5d3da79c48e1df4bab82c9680c53adeff7820


Please include the KernelCI tag when submitting a fix:

Reported-by: kernelci.org bot <[email protected]>


Log excerpt:
=====================================================
/tmp/kci/linux/fs/smb/client/cifsfs.c:1390:29: error: variable 'old_size' is uninitialized when used here [-Werror,-Wuninitialized]
 1390 |                 if (rc == 0 && new_size > old_size) {
      |                                           ^~~~~~~~
/tmp/kci/linux/fs/smb/client/cifsfs.c:1307:37: note: initialize the variable 'old_size' to silence this warning
 1307 |         unsigned long long i_size, old_size, new_size, zero_point;
      |                                            ^
      |                                             = 0
/tmp/kci/linux/fs/smb/client/cifsfs.c:1375:13: error: variable 'zero_point' is uninitialized when used here [-Werror,-Wuninitialized]
 1375 |         if (fend > zero_point)
      |                    ^~~~~~~~~~
/tmp/kci/linux/fs/smb/client/cifsfs.c:1307:59: note: initialize the variable 'zero_point' to silence this warning
 1307 |         unsigned long long i_size, old_size, new_size, zero_point;
      |                                                                  ^
      |                                                                   = 0
2 errors generated.

=====================================================


# Builds where the incident occurred:

## defconfig+allmodconfig+CONFIG_FRAME_WARN=2048 on (arm):
- compiler: clang-21
- config: None
- dashboard: https://d.kernelci.org/build/maestro:6a0b542b744d1c1da0198902


#kernelci issue maestro:8fef554699226f88449edfc56be31812d3edd327

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