On Fri, Jul 25, 2025 at 3:43 PM Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote: > > Regressions noticed while building x86_64 and i386 builds with clang-nightly > and clang-20 toolchains on the Linux next-20250725 tag. > > First seen on the Linux next-20250725 > Good: next-20250724 > Bad: next-20250725 > > Regression Analysis: > - New regression? Yes > - Reproducibility? Yes > > ## Build regressions > * i386, build > - clang-20-defconfig > - clang-nightly-defconfig > > * x86_64, build > - clang-20-allyesconfig > - clang-20-lkftconfig > - clang-20-lkftconfig-compat > - clang-20-lkftconfig-kcsan > - clang-20-lkftconfig-no-kselftest-frag > - clang-20-x86_64_defconfig > - clang-nightly-lkftconfig > - clang-nightly-lkftconfig-hardening > - clang-nightly-lkftconfig-kselftest > - clang-nightly-lkftconfig-lto-full > - clang-nightly-lkftconfig-lto-thing > - clang-nightly-x86_64_defconfig > - gcc-13-allyesconfig > - korg-clang-20-lkftconfig-hardening > - korg-clang-20-lkftconfig-lto-full > - korg-clang-20-lkftconfig-lto-thing > - rustclang-nightly-lkftconfig-kselftest > > Build regression: next-20250725 i386 x86_64 virtio_ring.c error > variable 'id' is uninitialized when used here > [-Werror,-Wuninitialized] > > Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> > > ## Build log > drivers/virtio/virtio_ring.c:2113:40: error: variable 'id' is > uninitialized when used here [-Werror,-Wuninitialized] > 2113 | BAD_RING(vq, "id %u out of range\n", id); > | ^~ > drivers/virtio/virtio_ring.c:2077:19: note: initialize the variable > 'id' to silence this warning > 2077 | u16 last_used, id, last_used_idx; > | ^ > | = 0 > 1 error generated. > A fix has been posted here: https://lore.kernel.org/virtualization/20250725083635.73355-1-jasowang@xxxxxxxxxx/T/#u Thanks
