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

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The variable type of offset should be consistent with the relevant
interfaces of mmap which described in commit 295f10061a ("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: Jessica Liu <liu.xuemei1@zte.com.cn>
Tested-by: Han Gao <rabenda.cn@gmail.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Nutty 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: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Jessica Liu 2025-08-01 10:49:48 +08:00 committed by Paul Walmsley
parent 01dc937ac1
commit 316b60b984
1 changed files with 1 additions and 1 deletions
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2
arch/riscv/kernel/sys_riscv.c
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@ -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)))