This patch series backports the minimum set of changes in order to fix this warning that popped up with >= 5.4.284 stable kernels:
In file included from ./include/linux/mm.h:29, from ./include/linux/pagemap.h:8, from ./include/linux/buffer_head.h:14, from fs/udf/udfdecl.h:12, from fs/udf/super.c:41: fs/udf/super.c: In function 'udf_fill_partdesc_info': ./include/linux/overflow.h:70:15: warning: comparison of distinct pointer types lacks a cast (void) (&__a == &__b); \ ^~ fs/udf/super.c:1162:7: note: in expansion of macro 'check_add_overflow' if (check_add_overflow(map->s_partition_len, ^~~~~~~~~~~~~~~~~~
Changes in v2: - added missing upstream commit ID to the last patch in the series
Kees Cook (2): overflow: Add __must_check attribute to check_*() helpers overflow: Allow mixed type arguments
Keith Busch (1): overflow: Correct check_shl_overflow() comment
include/linux/overflow.h | 101 +++++++++++++++++++++++---------------- 1 file changed, 60 insertions(+), 41 deletions(-)
From: Kees Cook keescook@chromium.org
commit 9b80e4c4ddaca3501177ed41e49d0928ba2122a8 upstream
Since the destination variable of the check_*_overflow() helpers will contain a wrapped value on failure, it would be best to make sure callers really did check the return result of the helper. Adjust the macros to use a bool-wrapping static inline that is marked with __must_check. This means the macros can continue to have their type-agnostic behavior while gaining the function attribute (that cannot be applied directly to macros).
Suggested-by: Rasmus Villemoes linux@rasmusvillemoes.dk Link: https://lore.kernel.org/lkml/202008151007.EF679DF@keescook/ Signed-off-by: Kees Cook keescook@chromium.org Signed-off-by: Florian Fainelli florian.fainelli@broadcom.com --- include/linux/overflow.h | 39 ++++++++++++++++++++++++--------------- 1 file changed, 24 insertions(+), 15 deletions(-)
diff --git a/include/linux/overflow.h b/include/linux/overflow.h index 63e7c77ba942..35af574d006f 100644 --- a/include/linux/overflow.h +++ b/include/linux/overflow.h @@ -44,6 +44,16 @@ #define is_non_negative(a) ((a) > 0 || (a) == 0) #define is_negative(a) (!(is_non_negative(a)))
+/* + * Allows for effectively applying __must_check to a macro so we can have + * both the type-agnostic benefits of the macros while also being able to + * enforce that the return value is, in fact, checked. + */ +static inline bool __must_check __must_check_overflow(bool overflow) +{ + return unlikely(overflow); +} + #ifdef COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW /* * For simplicity and code hygiene, the fallback code below insists on @@ -53,32 +63,32 @@ * alias for __builtin_add_overflow, but add type checks similar to * below. */ -#define check_add_overflow(a, b, d) ({ \ +#define check_add_overflow(a, b, d) __must_check_overflow(({ \ typeof(a) __a = (a); \ typeof(b) __b = (b); \ typeof(d) __d = (d); \ (void) (&__a == &__b); \ (void) (&__a == __d); \ __builtin_add_overflow(__a, __b, __d); \ -}) +}))
-#define check_sub_overflow(a, b, d) ({ \ +#define check_sub_overflow(a, b, d) __must_check_overflow(({ \ typeof(a) __a = (a); \ typeof(b) __b = (b); \ typeof(d) __d = (d); \ (void) (&__a == &__b); \ (void) (&__a == __d); \ __builtin_sub_overflow(__a, __b, __d); \ -}) +}))
-#define check_mul_overflow(a, b, d) ({ \ +#define check_mul_overflow(a, b, d) __must_check_overflow(({ \ typeof(a) __a = (a); \ typeof(b) __b = (b); \ typeof(d) __d = (d); \ (void) (&__a == &__b); \ (void) (&__a == __d); \ __builtin_mul_overflow(__a, __b, __d); \ -}) +}))
#else
@@ -191,21 +201,20 @@ })
-#define check_add_overflow(a, b, d) \ +#define check_add_overflow(a, b, d) __must_check_overflow( \ __builtin_choose_expr(is_signed_type(typeof(a)), \ __signed_add_overflow(a, b, d), \ - __unsigned_add_overflow(a, b, d)) + __unsigned_add_overflow(a, b, d)))
-#define check_sub_overflow(a, b, d) \ +#define check_sub_overflow(a, b, d) __must_check_overflow( \ __builtin_choose_expr(is_signed_type(typeof(a)), \ __signed_sub_overflow(a, b, d), \ - __unsigned_sub_overflow(a, b, d)) + __unsigned_sub_overflow(a, b, d)))
-#define check_mul_overflow(a, b, d) \ +#define check_mul_overflow(a, b, d) __must_check_overflow( \ __builtin_choose_expr(is_signed_type(typeof(a)), \ __signed_mul_overflow(a, b, d), \ - __unsigned_mul_overflow(a, b, d)) - + __unsigned_mul_overflow(a, b, d)))
#endif /* COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW */
@@ -228,7 +237,7 @@ * '*d' will hold the results of the attempted shift, but is not * considered "safe for use" if false is returned. */ -#define check_shl_overflow(a, s, d) ({ \ +#define check_shl_overflow(a, s, d) __must_check_overflow(({ \ typeof(a) _a = a; \ typeof(s) _s = s; \ typeof(d) _d = d; \ @@ -238,7 +247,7 @@ *_d = (_a_full << _to_shift); \ (_to_shift != _s || is_negative(*_d) || is_negative(_a) || \ (*_d >> _to_shift) != _a); \ -}) +}))
/** * size_mul() - Calculate size_t multiplication with saturation at SIZE_MAX
[ Sasha's backport helper bot ]
Hi,
✅ All tests passed successfully. No issues detected. No action required from the submitter.
The upstream commit SHA1 provided is correct: 9b80e4c4ddaca3501177ed41e49d0928ba2122a8
WARNING: Author mismatch between patch and upstream commit: Backport author: Florian Fainelliflorian.fainelli@broadcom.com Commit author: Kees Cookkeescook@chromium.org
Status in newer kernel trees: 6.13.y | Present (exact SHA1) 6.12.y | Present (exact SHA1) 6.6.y | Present (exact SHA1) 6.1.y | Present (exact SHA1)
Note: The patch differs from the upstream commit: --- 1: 9b80e4c4ddaca ! 1: 0aad002281c33 overflow: Add __must_check attribute to check_*() helpers @@ Metadata ## Commit message ## overflow: Add __must_check attribute to check_*() helpers
+ commit 9b80e4c4ddaca3501177ed41e49d0928ba2122a8 upstream + Since the destination variable of the check_*_overflow() helpers will contain a wrapped value on failure, it would be best to make sure callers really did check the return result of the helper. Adjust the macros to use @@ Commit message Suggested-by: Rasmus Villemoes linux@rasmusvillemoes.dk Link: https://lore.kernel.org/lkml/202008151007.EF679DF@keescook/ Signed-off-by: Kees Cook keescook@chromium.org + Signed-off-by: Florian Fainelli florian.fainelli@broadcom.com
## include/linux/overflow.h ## @@ @@ include/linux/overflow.h +}))
/** - * array_size() - Calculate size of 2-dimensional array. + * size_mul() - Calculate size_t multiplication with saturation at SIZE_MAX ---
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-5.4.y | Success | Success |
From: Keith Busch kbusch@kernel.org
commit 4578be130a6470d85ff05b13b75a00e6224eeeeb upstream
A 'false' return means the value was safely set, so the comment should say 'true' for when it is not considered safe.
Cc: Jason Gunthorpe jgg@ziepe.ca Signed-off-by: Keith Busch kbusch@kernel.org Signed-off-by: Kees Cook keescook@chromium.org Fixes: 0c66847793d1 ("overflow.h: Add arithmetic shift helper") Link: https://lore.kernel.org/r/20210401160629.1941787-1-kbusch@kernel.org Signed-off-by: Florian Fainelli florian.fainelli@broadcom.com --- include/linux/overflow.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/overflow.h b/include/linux/overflow.h index 35af574d006f..d1dd039fe1c3 100644 --- a/include/linux/overflow.h +++ b/include/linux/overflow.h @@ -235,7 +235,7 @@ static inline bool __must_check __must_check_overflow(bool overflow) * - 'a << s' sets the sign bit, if any, in '*d'. * * '*d' will hold the results of the attempted shift, but is not - * considered "safe for use" if false is returned. + * considered "safe for use" if true is returned. */ #define check_shl_overflow(a, s, d) __must_check_overflow(({ \ typeof(a) _a = a; \
[ Sasha's backport helper bot ]
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✅ All tests passed successfully. No issues detected. No action required from the submitter.
The upstream commit SHA1 provided is correct: 4578be130a6470d85ff05b13b75a00e6224eeeeb
WARNING: Author mismatch between patch and upstream commit: Backport author: Florian Fainelliflorian.fainelli@broadcom.com Commit author: Keith Buschkbusch@kernel.org
Status in newer kernel trees: 6.13.y | Present (exact SHA1) 6.12.y | Present (exact SHA1) 6.6.y | Present (exact SHA1) 6.1.y | Present (exact SHA1)
Note: The patch differs from the upstream commit: --- 1: 4578be130a647 ! 1: a99708e5c1aad overflow: Correct check_shl_overflow() comment @@ Metadata ## Commit message ## overflow: Correct check_shl_overflow() comment
+ commit 4578be130a6470d85ff05b13b75a00e6224eeeeb upstream + A 'false' return means the value was safely set, so the comment should say 'true' for when it is not considered safe.
@@ Commit message Signed-off-by: Kees Cook keescook@chromium.org Fixes: 0c66847793d1 ("overflow.h: Add arithmetic shift helper") Link: https://lore.kernel.org/r/20210401160629.1941787-1-kbusch@kernel.org + Signed-off-by: Florian Fainelli florian.fainelli@broadcom.com
## include/linux/overflow.h ## @@ include/linux/overflow.h: static inline bool __must_check __must_check_overflow(bool overflow) ---
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-5.4.y | Success | Success |
From: Kees Cook keescook@chromium.org
commit d219d2a9a92e39aa92799efe8f2aa21259b6dd82 upstream
When the check_[op]_overflow() helpers were introduced, all arguments were required to be the same type to make the fallback macros simpler. However, now that the fallback macros have been removed[1], it is fine to allow mixed types, which makes using the helpers much more useful, as they can be used to test for type-based overflows (e.g. adding two large ints but storing into a u8), as would be handy in the drm core[2].
Remove the restriction, and add additional self-tests that exercise some of the mixed-type overflow cases, and double-check for accidental macro side-effects.
[1] https://git.kernel.org/linus/4eb6bd55cfb22ffc20652732340c4962f3ac9a91 [2] https://lore.kernel.org/lkml/20220824084514.2261614-2-gwan-gyeong.mun@intel....
Cc: Rasmus Villemoes linux@rasmusvillemoes.dk Cc: Gwan-gyeong Mun gwan-gyeong.mun@intel.com Cc: "Gustavo A. R. Silva" gustavoars@kernel.org Cc: Nick Desaulniers ndesaulniers@google.com Cc: linux-hardening@vger.kernel.org Reviewed-by: Andrzej Hajda andrzej.hajda@intel.com Reviewed-by: Gwan-gyeong Mun gwan-gyeong.mun@intel.com Tested-by: Gwan-gyeong Mun gwan-gyeong.mun@intel.com Signed-off-by: Kees Cook keescook@chromium.org [florian: Drop changes to lib/test_overflow.c] Signed-off-by: Florian Fainelli florian.fainelli@broadcom.com --- include/linux/overflow.h | 72 +++++++++++++++++++++++----------------- 1 file changed, 41 insertions(+), 31 deletions(-)
diff --git a/include/linux/overflow.h b/include/linux/overflow.h index d1dd039fe1c3..54788a3cdcf5 100644 --- a/include/linux/overflow.h +++ b/include/linux/overflow.h @@ -55,40 +55,50 @@ static inline bool __must_check __must_check_overflow(bool overflow) }
#ifdef COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW -/* - * For simplicity and code hygiene, the fallback code below insists on - * a, b and *d having the same type (similar to the min() and max() - * macros), whereas gcc's type-generic overflow checkers accept - * different types. Hence we don't just make check_add_overflow an - * alias for __builtin_add_overflow, but add type checks similar to - * below. +/** check_add_overflow() - Calculate addition with overflow checking + * + * @a: first addend + * @b: second addend + * @d: pointer to store sum + * + * Returns 0 on success. + * + * *@d holds the results of the attempted addition, but is not considered + * "safe for use" on a non-zero return value, which indicates that the + * sum has overflowed or been truncated. */ -#define check_add_overflow(a, b, d) __must_check_overflow(({ \ - typeof(a) __a = (a); \ - typeof(b) __b = (b); \ - typeof(d) __d = (d); \ - (void) (&__a == &__b); \ - (void) (&__a == __d); \ - __builtin_add_overflow(__a, __b, __d); \ -})) +#define check_add_overflow(a, b, d) \ + __must_check_overflow(__builtin_add_overflow(a, b, d))
-#define check_sub_overflow(a, b, d) __must_check_overflow(({ \ - typeof(a) __a = (a); \ - typeof(b) __b = (b); \ - typeof(d) __d = (d); \ - (void) (&__a == &__b); \ - (void) (&__a == __d); \ - __builtin_sub_overflow(__a, __b, __d); \ -})) +/** check_sub_overflow() - Calculate subtraction with overflow checking + * + * @a: minuend; value to subtract from + * @b: subtrahend; value to subtract from @a + * @d: pointer to store difference + * + * Returns 0 on success. + * + * *@d holds the results of the attempted subtraction, but is not considered + * "safe for use" on a non-zero return value, which indicates that the + * difference has underflowed or been truncated. + */ +#define check_sub_overflow(a, b, d) \ + __must_check_overflow(__builtin_sub_overflow(a, b, d))
-#define check_mul_overflow(a, b, d) __must_check_overflow(({ \ - typeof(a) __a = (a); \ - typeof(b) __b = (b); \ - typeof(d) __d = (d); \ - (void) (&__a == &__b); \ - (void) (&__a == __d); \ - __builtin_mul_overflow(__a, __b, __d); \ -})) +/** check_mul_overflow() - Calculate multiplication with overflow checking + * + * @a: first factor + * @b: second factor + * @d: pointer to store product + * + * Returns 0 on success. + * + * *@d holds the results of the attempted multiplication, but is not + * considered "safe for use" on a non-zero return value, which indicates + * that the product has overflowed or been truncated. + */ +#define check_mul_overflow(a, b, d) \ + __must_check_overflow(__builtin_mul_overflow(a, b, d))
#else
[ Sasha's backport helper bot ]
Hi,
✅ All tests passed successfully. No issues detected. No action required from the submitter.
The upstream commit SHA1 provided is correct: d219d2a9a92e39aa92799efe8f2aa21259b6dd82
WARNING: Author mismatch between patch and upstream commit: Backport author: Florian Fainelliflorian.fainelli@broadcom.com Commit author: Kees Cookkeescook@chromium.org
Status in newer kernel trees: 6.13.y | Present (exact SHA1) 6.12.y | Present (exact SHA1) 6.6.y | Present (exact SHA1) 6.1.y | Present (exact SHA1)
Note: The patch differs from the upstream commit: --- 1: d219d2a9a92e3 ! 1: 060e28cfd618f overflow: Allow mixed type arguments @@ Metadata ## Commit message ## overflow: Allow mixed type arguments
+ commit d219d2a9a92e39aa92799efe8f2aa21259b6dd82 upstream + When the check_[op]_overflow() helpers were introduced, all arguments were required to be the same type to make the fallback macros simpler. However, now that the fallback macros have been removed[1], it is fine @@ Commit message Reviewed-by: Gwan-gyeong Mun gwan-gyeong.mun@intel.com Tested-by: Gwan-gyeong Mun gwan-gyeong.mun@intel.com Signed-off-by: Kees Cook keescook@chromium.org + [florian: Drop changes to lib/test_overflow.c] + Signed-off-by: Florian Fainelli florian.fainelli@broadcom.com
## include/linux/overflow.h ## @@ include/linux/overflow.h: static inline bool __must_check __must_check_overflow(bool overflow) - return unlikely(overflow); }
+ #ifdef COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW -/* - * For simplicity and code hygiene, the fallback code below insists on - * a, b and *d having the same type (similar to the min() and max() @@ include/linux/overflow.h: static inline bool __must_check __must_check_overflow( +#define check_mul_overflow(a, b, d) \ + __must_check_overflow(__builtin_mul_overflow(a, b, d))
- /** check_shl_overflow() - Calculate a left-shifted value and check overflow - * - - ## lib/overflow_kunit.c ## -@@ - #include <linux/types.h> - #include <linux/vmalloc.h> - --#define DEFINE_TEST_ARRAY(t) \ -- static const struct test_ ## t { \ -- t a, b; \ -- t sum, diff, prod; \ -- bool s_of, d_of, p_of; \ -- } t ## _tests[] -+#define DEFINE_TEST_ARRAY_TYPED(t1, t2, t) \ -+ static const struct test_ ## t1 ## _ ## t2 ## __ ## t { \ -+ t1 a; \ -+ t2 b; \ -+ t sum, diff, prod; \ -+ bool s_of, d_of, p_of; \ -+ } t1 ## _ ## t2 ## __ ## t ## _tests[] -+ -+#define DEFINE_TEST_ARRAY(t) DEFINE_TEST_ARRAY_TYPED(t, t, t) - - DEFINE_TEST_ARRAY(u8) = { - {0, 0, 0, 0, 0, false, false, false}, -@@ lib/overflow_kunit.c: DEFINE_TEST_ARRAY(s64) = { - }; - #endif - --#define check_one_op(t, fmt, op, sym, a, b, r, of) do { \ -- t _r; \ -- bool _of; \ -- \ -- _of = check_ ## op ## _overflow(a, b, &_r); \ -- KUNIT_EXPECT_EQ_MSG(test, _of, of, \ -+#define check_one_op(t, fmt, op, sym, a, b, r, of) do { \ -+ int _a_orig = a, _a_bump = a + 1; \ -+ int _b_orig = b, _b_bump = b + 1; \ -+ bool _of; \ -+ t _r; \ -+ \ -+ _of = check_ ## op ## _overflow(a, b, &_r); \ -+ KUNIT_EXPECT_EQ_MSG(test, _of, of, \ - "expected "fmt" "sym" "fmt" to%s overflow (type %s)\n", \ -- a, b, of ? "" : " not", #t); \ -- KUNIT_EXPECT_EQ_MSG(test, _r, r, \ -+ a, b, of ? "" : " not", #t); \ -+ KUNIT_EXPECT_EQ_MSG(test, _r, r, \ - "expected "fmt" "sym" "fmt" == "fmt", got "fmt" (type %s)\n", \ -- a, b, r, _r, #t); \ -+ a, b, r, _r, #t); \ -+ /* Check for internal macro side-effects. */ \ -+ _of = check_ ## op ## _overflow(_a_orig++, _b_orig++, &_r); \ -+ KUNIT_EXPECT_EQ_MSG(test, _a_orig, _a_bump, "Unexpected " #op " macro side-effect!\n"); \ -+ KUNIT_EXPECT_EQ_MSG(test, _b_orig, _b_bump, "Unexpected " #op " macro side-effect!\n"); \ - } while (0) - --#define DEFINE_TEST_FUNC(t, fmt) \ --static void do_test_ ## t(struct kunit *test, const struct test_ ## t *p) \ -+#define DEFINE_TEST_FUNC_TYPED(n, t, fmt) \ -+static void do_test_ ## n(struct kunit *test, const struct test_ ## n *p) \ - { \ - check_one_op(t, fmt, add, "+", p->a, p->b, p->sum, p->s_of); \ - check_one_op(t, fmt, add, "+", p->b, p->a, p->sum, p->s_of); \ -@@ lib/overflow_kunit.c: static void do_test_ ## t(struct kunit *test, const struct test_ ## t *p) \ - check_one_op(t, fmt, mul, "*", p->b, p->a, p->prod, p->p_of); \ - } \ - \ --static void t ## _overflow_test(struct kunit *test) { \ -+static void n ## _overflow_test(struct kunit *test) { \ - unsigned i; \ - \ -- for (i = 0; i < ARRAY_SIZE(t ## _tests); ++i) \ -- do_test_ ## t(test, &t ## _tests[i]); \ -+ for (i = 0; i < ARRAY_SIZE(n ## _tests); ++i) \ -+ do_test_ ## n(test, &n ## _tests[i]); \ - kunit_info(test, "%zu %s arithmetic tests finished\n", \ -- ARRAY_SIZE(t ## _tests), #t); \ -+ ARRAY_SIZE(n ## _tests), #n); \ - } - -+#define DEFINE_TEST_FUNC(t, fmt) \ -+ DEFINE_TEST_FUNC_TYPED(t ## _ ## t ## __ ## t, t, fmt) -+ - DEFINE_TEST_FUNC(u8, "%d"); - DEFINE_TEST_FUNC(s8, "%d"); - DEFINE_TEST_FUNC(u16, "%d"); -@@ lib/overflow_kunit.c: DEFINE_TEST_FUNC(u64, "%llu"); - DEFINE_TEST_FUNC(s64, "%lld"); - #endif - -+DEFINE_TEST_ARRAY_TYPED(u32, u32, u8) = { -+ {0, 0, 0, 0, 0, false, false, false}, -+ {U8_MAX, 2, 1, U8_MAX - 2, U8_MAX - 1, true, false, true}, -+ {U8_MAX + 1, 0, 0, 0, 0, true, true, false}, -+}; -+DEFINE_TEST_FUNC_TYPED(u32_u32__u8, u8, "%d"); -+ -+DEFINE_TEST_ARRAY_TYPED(u32, u32, int) = { -+ {0, 0, 0, 0, 0, false, false, false}, -+ {U32_MAX, 0, -1, -1, 0, true, true, false}, -+}; -+DEFINE_TEST_FUNC_TYPED(u32_u32__int, int, "%d"); -+ -+DEFINE_TEST_ARRAY_TYPED(u8, u8, int) = { -+ {0, 0, 0, 0, 0, false, false, false}, -+ {U8_MAX, U8_MAX, 2 * U8_MAX, 0, U8_MAX * U8_MAX, false, false, false}, -+ {1, 2, 3, -1, 2, false, false, false}, -+}; -+DEFINE_TEST_FUNC_TYPED(u8_u8__int, int, "%d"); -+ -+DEFINE_TEST_ARRAY_TYPED(int, int, u8) = { -+ {0, 0, 0, 0, 0, false, false, false}, -+ {1, 2, 3, U8_MAX, 2, false, true, false}, -+ {-1, 0, U8_MAX, U8_MAX, 0, true, true, false}, -+}; -+DEFINE_TEST_FUNC_TYPED(int_int__u8, u8, "%d"); -+ - static void overflow_shift_test(struct kunit *test) - { - int count = 0; -@@ lib/overflow_kunit.c: static void overflow_size_helpers_test(struct kunit *test) - } + #else
- static struct kunit_case overflow_test_cases[] = { -- KUNIT_CASE(u8_overflow_test), -- KUNIT_CASE(s8_overflow_test), -- KUNIT_CASE(u16_overflow_test), -- KUNIT_CASE(s16_overflow_test), -- KUNIT_CASE(u32_overflow_test), -- KUNIT_CASE(s32_overflow_test), -+ KUNIT_CASE(u8_u8__u8_overflow_test), -+ KUNIT_CASE(s8_s8__s8_overflow_test), -+ KUNIT_CASE(u16_u16__u16_overflow_test), -+ KUNIT_CASE(s16_s16__s16_overflow_test), -+ KUNIT_CASE(u32_u32__u32_overflow_test), -+ KUNIT_CASE(s32_s32__s32_overflow_test), - /* Clang 13 and earlier generate unwanted libcalls on 32-bit. */ - #if BITS_PER_LONG == 64 -- KUNIT_CASE(u64_overflow_test), -- KUNIT_CASE(s64_overflow_test), -+ KUNIT_CASE(u64_u64__u64_overflow_test), -+ KUNIT_CASE(s64_s64__s64_overflow_test), - #endif -+ KUNIT_CASE(u32_u32__u8_overflow_test), -+ KUNIT_CASE(u32_u32__int_overflow_test), -+ KUNIT_CASE(u8_u8__int_overflow_test), -+ KUNIT_CASE(int_int__u8_overflow_test), - KUNIT_CASE(overflow_shift_test), - KUNIT_CASE(overflow_allocation_test), - KUNIT_CASE(overflow_size_helpers_test), ---
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-5.4.y | Success | Success |
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