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Fix panic in madv_free()

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This commit is contained in:
Marsman1996
2024-08-16 16:38:38 +08:00
committed by Tate, Hongliang Tian
parent bbe43d76cc
commit 18607c33ea
1 changed files with 11 additions and 2 deletions
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13
kernel/aster-nix/src/syscall/madvise.rs
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@ -33,8 +33,17 @@ pub fn sys_madvise(
} }
fn madv_free(start: Vaddr, len: usize, ctx: &Context) -> Result<()> { fn madv_free(start: Vaddr, len: usize, ctx: &Context) -> Result<()> {
debug_assert!(start % PAGE_SIZE == 0); if start % PAGE_SIZE != 0 {
debug_assert!(len % PAGE_SIZE == 0); return_errno_with_message!(Errno::EINVAL, "the start address should be page aligned");
}
if len % PAGE_SIZE != 0 {
return_errno_with_message!(Errno::EINVAL, "the length should be page aligned");
}
if len == 0 {
return_errno_with_message!(Errno::EINVAL, "madv_free len cannot be zero");
}
let root_vmar = ctx.process.root_vmar(); let root_vmar = ctx.process.root_vmar();
let advised_range = start..start + len; let advised_range = start..start + len;