This series backports four commits to bring include/linux/overflow.h in
line with v5.15.193:
- 2541be80b1a2 ("overflow: Correct check_shl_overflow() comment")
- 564e84663d25 ("compiler.h: drop fallback overflow checkers")
- 1d1ac8244c22 ("overflow: Allow mixed type arguments")
- f96cfe3e05b0 ("tracing: Define the is_signed_type() macro once")
The motivation is to fix build failures such as:
drivers/net/ethernet/intel/e1000e/ethtool.c: In function ‘e1000_set_eeprom’:
./include/linux/overflow.h:71:15: error: comparison of distinct pointer types lacks a cast [-Werror]
71 | (void) (&__a == __d); \
| ^~
drivers/net/ethernet/intel/e1000e/ethtool.c:582:6: note: in expansion of macro ‘check_add_overflow’
582 | if (check_add_overflow(eeprom->offset, eeprom->len, &total_len) ||
| ^~~~~~~~~~~~~~~~~~
This regression was triggered by commit ce8829d3d44b ("e1000e: fix heap
overflow in e1000_set_eeprom").
check_add_overflow() requires the first two operands and the result
pointer to be of identical type. On 64-bit builds, using size_t for the
result conflicted with the u32 fields eeprom->offset and eeprom->len,
resulting in type check failures.
BarteVan Assche (1):
tracing: Define the is_signed_type() macro once
Kees Cook (1):
overflow: Allow mixed type arguments
Keith Busch (1):
overflow: Correct check_shl_overflow() comment
Nick Desaulniers (1):
compiler.h: drop fallback overflow checkers
include/linux/compiler-clang.h | 13 --
include/linux/compiler-gcc.h | 4 -
include/linux/compiler.h | 6 +
include/linux/overflow.h | 209 ++++++-----------------------
include/linux/trace_events.h | 2 -
tools/include/linux/compiler-gcc.h | 4 -
tools/include/linux/overflow.h | 140 +------------------
7 files changed, 52 insertions(+), 326 deletions(-)
---
Changes in v2:
- Added missing sign-off in all patches
--
2.47.3