6.12-stable review patch. If anyone has any objections, please let me know.
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From: Radim Krčmář rkrcmar@ventanamicro.com
commit f4ea67a722e8c9e1fb8109adebb9fb881ff0793a upstream.
REG_L is wrong, because thread_info.cpu is 32-bit, not xlen-bit wide. The struct currently has a hole after cpu, so little endian accesses seemed fine.
Fixes: be97d0db5f44 ("riscv: VMAP_STACK overflow detection thread-safe") Cc: stable@vger.kernel.org Reviewed-by: Alexandre Ghiti alexghiti@rivosinc.com Signed-off-by: Radim Krčmář rkrcmar@ventanamicro.com Link: https://lore.kernel.org/r/20250725165410.2896641-5-rkrcmar@ventanamicro.com Signed-off-by: Paul Walmsley pjw@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/riscv/include/asm/asm.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/riscv/include/asm/asm.h +++ b/arch/riscv/include/asm/asm.h @@ -90,7 +90,7 @@ #endif
.macro asm_per_cpu dst sym tmp - REG_L \tmp, TASK_TI_CPU_NUM(tp) + lw \tmp, TASK_TI_CPU_NUM(tp) slli \tmp, \tmp, PER_CPU_OFFSET_SHIFT la \dst, __per_cpu_offset add \dst, \dst, \tmp