Marcos Oduardo 2727c43f8d lib: sbi: Fix undefined behavior in signed shifts in sbi_hart.c ...

UBSan detected undefined behavior in sbi_hart.c and sbi_fwft.c (in
the case of sbi_fwft.c, the bug comes from a macro call defined at
sbi_ecall_interface.h) caused by shifting a signed integer into the
sign bit (1 << 31)

This can be fixed by using the 1UL literal, ensuring defined arithmetic.

Please let me know if there’s any other most suitable solution for
this bug.

Signed-off-by: Marcos Oduardo <marcos.oduardo@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260223001202.284612-1-marcos.oduardo@gmail.com
Signed-off-by: Anup Patel <anup@brainfault.org>

2026-03-09 12:13:20 +05:30

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