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[BUG] linuxA bug that should be fixed in the mainline kernel.A bug that should be fixed in the mainline kernel.[FIXED][LINUX] 6.15This bug was fixed in Linux 6.15This bug was fixed in Linux 6.15
Description
Gave v6.14-rc3 a test ride on my Thinkpad T60 and noticed stackinit_kunit tests fail when I build the kernel with clang-19. Same kernel built with gcc-14 passes test.
This is also reproducible on qemu. I used qemu-system-i386 -smp 2 -m 2G -nographic -append "console=ttyS0 root=/dev/sda1" -kernel /boot/vmlinuz-6.14.0-rc3-P3 -hda Debian-VM_p3.img on qemu 9.1.2 on Gentoo Linux with a Debian 12.9 image.
KTAP version 1
1..1
KTAP version 1
# Subtest: stackinit
# module: stackinit_kunit
1..108
ok 1 test_u8_zero
ok 2 test_u16_zero
ok 3 test_u32_zero
ok 4 test_u64_zero
ok 5 test_char_array_zero
ok 6 test_small_hole_zero
# test_big_hole_zero: ASSERTION FAILED at lib/stackinit_kunit.c:428
Expected sum == 0, but
sum == 124 (0x7c)
uninit bytes: 124
not ok 7 test_big_hole_zero
ok 8 test_trailing_hole_zero
ok 9 test_packed_zero
ok 10 test_small_hole_old_zero
# test_big_hole_old_zero: ASSERTION FAILED at lib/stackinit_kunit.c:429
Expected sum == 0, but
sum == 124 (0x7c)
uninit bytes: 124
not ok 11 test_big_hole_old_zero
ok 12 test_trailing_hole_old_zero
ok 13 test_packed_old_zero
ok 14 test_same_sizes_zero
# test_small_start_zero: ASSERTION FAILED at lib/stackinit_kunit.c:430
Expected sum == 0, but
sum == 31 (0x1f)
uninit bytes: 31
not ok 15 test_small_start_zero
# test_small_end_zero: ASSERTION FAILED at lib/stackinit_kunit.c:430
Expected sum == 0, but
sum == 2 (0x2)
uninit bytes: 2
not ok 16 test_small_end_zero
ok 17 test_same_sizes_old_zero
# test_small_start_old_zero: ASSERTION FAILED at lib/stackinit_kunit.c:431
Expected sum == 0, but
sum == 31 (0x1f)
uninit bytes: 31
not ok 18 test_small_start_old_zero
# test_small_end_old_zero: ASSERTION FAILED at lib/stackinit_kunit.c:431
Expected sum == 0, but
sum == 2 (0x2)
uninit bytes: 2
not ok 19 test_small_end_old_zero
# test_small_hole_dynamic_partial: ASSERTION FAILED at lib/stackinit_kunit.c:434
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 20 test_small_hole_dynamic_partial
ok 21 test_big_hole_dynamic_partial
# test_trailing_hole_dynamic_partial: ASSERTION FAILED at lib/stackinit_kunit.c:434
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 22 test_trailing_hole_dynamic_partial
ok 23 test_packed_dynamic_partial
# test_small_hole_assigned_dynamic_partial: ASSERTION FAILED at lib/stackinit_kunit.c:437
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 24 test_small_hole_assigned_dynamic_partial
ok 25 test_big_hole_assigned_dynamic_partial
# test_trailing_hole_assigned_dynamic_partial: ASSERTION FAILED at lib/stackinit_kunit.c:437
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 26 test_trailing_hole_assigned_dynamic_partial
ok 27 test_packed_assigned_dynamic_partial
ok 28 test_same_sizes_dynamic_partial
ok 29 test_small_start_dynamic_partial
ok 30 test_small_end_dynamic_partial
ok 31 test_same_sizes_assigned_dynamic_partial
ok 32 test_small_start_assigned_dynamic_partial
ok 33 test_small_end_assigned_dynamic_partial
ok 34 test_small_hole_static_partial
# test_big_hole_static_partial: ASSERTION FAILED at lib/stackinit_kunit.c:433
Expected sum == 0, but
sum == 124 (0x7c)
uninit bytes: 124
not ok 35 test_big_hole_static_partial
ok 36 test_trailing_hole_static_partial
ok 37 test_packed_static_partial
ok 38 test_small_hole_static_all
# test_big_hole_static_all: ASSERTION FAILED at lib/stackinit_kunit.c:433
Expected sum == 0, but
sum == 124 (0x7c)
uninit bytes: 124
not ok 39 test_big_hole_static_all
ok 40 test_trailing_hole_static_all
ok 41 test_packed_static_all
# test_small_hole_dynamic_all: ASSERTION FAILED at lib/stackinit_kunit.c:434
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 42 test_small_hole_dynamic_all
ok 43 test_big_hole_dynamic_all
# test_trailing_hole_dynamic_all: ASSERTION FAILED at lib/stackinit_kunit.c:434
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 44 test_trailing_hole_dynamic_all
ok 45 test_packed_dynamic_all
# test_small_hole_runtime_partial: ASSERTION FAILED at lib/stackinit_kunit.c:435
Expected sum == 0, but
sum == 15 (0xf)
uninit bytes: 15
not ok 46 test_small_hole_runtime_partial
# test_big_hole_runtime_partial: ASSERTION FAILED at lib/stackinit_kunit.c:435
Expected sum == 0, but
sum == 127 (0x7f)
uninit bytes: 127
not ok 47 test_big_hole_runtime_partial
# test_trailing_hole_runtime_partial: ASSERTION FAILED at lib/stackinit_kunit.c:435
Expected sum == 0, but
sum == 12 (0xc)
uninit bytes: 12
not ok 48 test_trailing_hole_runtime_partial
# test_packed_runtime_partial: ASSERTION FAILED at lib/stackinit_kunit.c:435
Expected sum == 0, but
sum == 12 (0xc)
uninit bytes: 12
not ok 49 test_packed_runtime_partial
# test_small_hole_runtime_all: ASSERTION FAILED at lib/stackinit_kunit.c:435
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 50 test_small_hole_runtime_all
# test_big_hole_runtime_all: ASSERTION FAILED at lib/stackinit_kunit.c:435
Expected sum == 0, but
sum == 124 (0x7c)
uninit bytes: 124
not ok 51 test_big_hole_runtime_all
# test_trailing_hole_runtime_all: ASSERTION FAILED at lib/stackinit_kunit.c:435
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 52 test_trailing_hole_runtime_all
ok 53 test_packed_runtime_all
# test_small_hole_assigned_static_partial: ASSERTION FAILED at lib/stackinit_kunit.c:436
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 54 test_small_hole_assigned_static_partial
ok 55 test_big_hole_assigned_static_partial
# test_trailing_hole_assigned_static_partial: ASSERTION FAILED at lib/stackinit_kunit.c:436
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 56 test_trailing_hole_assigned_static_partial
ok 57 test_packed_assigned_static_partial
# test_small_hole_assigned_static_all: ASSERTION FAILED at lib/stackinit_kunit.c:436
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 58 test_small_hole_assigned_static_all
ok 59 test_big_hole_assigned_static_all
# test_trailing_hole_assigned_static_all: ASSERTION FAILED at lib/stackinit_kunit.c:436
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 60 test_trailing_hole_assigned_static_all
ok 61 test_packed_assigned_static_all
# test_small_hole_assigned_dynamic_all: ASSERTION FAILED at lib/stackinit_kunit.c:437
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 62 test_small_hole_assigned_dynamic_all
ok 63 test_big_hole_assigned_dynamic_all
# test_trailing_hole_assigned_dynamic_all: ASSERTION FAILED at lib/stackinit_kunit.c:437
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 64 test_trailing_hole_assigned_dynamic_all
ok 65 test_packed_assigned_dynamic_all
ok 66 test_same_sizes_static_partial
# test_small_start_static_partial: ASSERTION FAILED at lib/stackinit_kunit.c:439
Expected sum == 0, but
sum == 31 (0x1f)
uninit bytes: 31
not ok 67 test_small_start_static_partial
ok 68 test_small_end_static_partial
ok 69 test_same_sizes_static_all
# test_small_start_static_all: ASSERTION FAILED at lib/stackinit_kunit.c:439
Expected sum == 0, but
sum == 28 (0x1c)
uninit bytes: 28
not ok 70 test_small_start_static_all
# test_small_end_static_all: ASSERTION FAILED at lib/stackinit_kunit.c:439
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 71 test_small_end_static_all
ok 72 test_same_sizes_dynamic_all
ok 73 test_small_start_dynamic_all
# test_small_end_dynamic_all: ASSERTION FAILED at lib/stackinit_kunit.c:440
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 74 test_small_end_dynamic_all
ok 75 test_same_sizes_runtime_partial
# test_small_start_runtime_partial: ASSERTION FAILED at lib/stackinit_kunit.c:441
Expected sum == 0, but
sum == 31 (0x1f)
uninit bytes: 31
not ok 76 test_small_start_runtime_partial
ok 77 test_small_end_runtime_partial
ok 78 test_same_sizes_runtime_all
# test_small_start_runtime_all: ASSERTION FAILED at lib/stackinit_kunit.c:441
Expected sum == 0, but
sum == 28 (0x1c)
uninit bytes: 28
not ok 79 test_small_start_runtime_all
ok 80 test_small_end_runtime_all
ok 81 test_same_sizes_assigned_static_partial
ok 82 test_small_start_assigned_static_partial
ok 83 test_small_end_assigned_static_partial
ok 84 test_same_sizes_assigned_static_all
ok 85 test_small_start_assigned_static_all
# test_small_end_assigned_static_all: ASSERTION FAILED at lib/stackinit_kunit.c:442
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 86 test_small_end_assigned_static_all
ok 87 test_same_sizes_assigned_dynamic_all
ok 88 test_small_start_assigned_dynamic_all
# test_small_end_assigned_dynamic_all: ASSERTION FAILED at lib/stackinit_kunit.c:443
Expected sum == 0, but
sum == 3 (0x3)
uninit bytes: 3
not ok 89 test_small_end_assigned_dynamic_all
ok 90 test_small_hole_assigned_copy # SKIP XFAIL uninit bytes: 3
ok 91 test_big_hole_assigned_copy # SKIP XFAIL uninit bytes: 124
ok 92 test_trailing_hole_assigned_copy # SKIP XFAIL uninit bytes: 3
ok 93 test_packed_assigned_copy
ok 94 test_same_sizes_assigned_copy
ok 95 test_small_start_assigned_copy # SKIP XFAIL uninit bytes: 28
ok 96 test_small_end_assigned_copy
# test_u8_none: ASSERTION FAILED at lib/stackinit_kunit.c:446
Expected sum == 0, but
sum == 1 (0x1)
uninit bytes: 1
not ok 97 test_u8_none
# test_u16_none: ASSERTION FAILED at lib/stackinit_kunit.c:446
Expected sum == 0, but
sum == 2 (0x2)
uninit bytes: 2
not ok 98 test_u16_none
# test_u32_none: ASSERTION FAILED at lib/stackinit_kunit.c:446
Expected sum == 0, but
sum == 4 (0x4)
uninit bytes: 4
not ok 99 test_u32_none
# test_u64_none: ASSERTION FAILED at lib/stackinit_kunit.c:446
Expected sum == 0, but
sum == 8 (0x8)
uninit bytes: 8
not ok 100 test_u64_none
# test_char_array_none: ASSERTION FAILED at lib/stackinit_kunit.c:446
Expected sum == 0, but
sum == 16 (0x10)
uninit bytes: 16
not ok 101 test_char_array_none
ok 102 test_switch_1_none # SKIP XFAIL uninit bytes: 80
ok 103 test_switch_2_none # SKIP XFAIL uninit bytes: 80
# test_small_hole_none: ASSERTION FAILED at lib/stackinit_kunit.c:447
Expected sum == 0, but
sum == 16 (0x10)
uninit bytes: 16
not ok 104 test_small_hole_none
# test_big_hole_none: ASSERTION FAILED at lib/stackinit_kunit.c:447
Expected sum == 0, but
sum == 128 (0x80)
uninit bytes: 128
not ok 105 test_big_hole_none
# test_trailing_hole_none: ASSERTION FAILED at lib/stackinit_kunit.c:447
Expected sum == 0, but
sum == 16 (0x10)
uninit bytes: 16
not ok 106 test_trailing_hole_none
# test_packed_none: ASSERTION FAILED at lib/stackinit_kunit.c:447
Expected sum == 0, but
sum == 16 (0x10)
uninit bytes: 16
not ok 107 test_packed_none
# test_user: ASSERTION FAILED at lib/stackinit_kunit.c:449
Expected sum == 0, but
sum == 16 (0x10)
uninit bytes: 16
not ok 108 test_user
# stackinit: pass:57 fail:45 skip:6 total:108
# Totals: pass:57 fail:45 skip:6 total:108
not ok 1 stackinit
Full dmesg from my Thinkpad T60 attached, Kernel .config attached.
config_614-rc3_p3-gcc14.txt
config_614-rc3_p3-clang19.txt
dmesg_614-rc3_p3-clang19.log
dmesg_614-rc3_p3-gcc14.log
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[BUG] linuxA bug that should be fixed in the mainline kernel.A bug that should be fixed in the mainline kernel.[FIXED][LINUX] 6.15This bug was fixed in Linux 6.15This bug was fixed in Linux 6.15