Commit 316b60b9 authored by Jessica Liu's avatar Jessica Liu Committed by Paul Walmsley
Browse files

riscv: mmap(): use unsigned offset type in riscv_sys_mmap 



The variable type of offset should be consistent with the relevant
interfaces of mmap which described in commit 295f1006 ("syscalls:
mmap(): use unsigned offset type consistently"). Otherwise, a user input
with the top bit set would result in a negative page offset rather than a
large one.

Signed-off-by: default avatarJessica Liu <liu.xuemei1@zte.com.cn>
Tested-by: default avatarHan Gao <rabenda.cn@gmail.com>
Reviewed-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: default avatarNutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250801104948133AaMr5S6E382PbNNhoJgHA@zte.com.cn


[pjw@kernel.org: hand-applied mangled patch; fixed checkpatch error]
Signed-off-by: default avatarPaul Walmsley <pjw@kernel.org>
parent 01dc937a

arch/riscv/kernel/sys_riscv.c

+1 −1
Original line number Diff line number Diff line
@@ -10,7 +10,7 @@ 


static long riscv_sys_mmap(unsigned long addr, unsigned long len,

			   unsigned long prot, unsigned long flags,

			   unsigned long fd, off_t offset,

			   unsigned long fd, unsigned long offset,

			   unsigned long page_shift_offset)

{

	if (unlikely(offset & (~PAGE_MASK >> page_shift_offset)))