22 lines
592 B
Rust
22 lines
592 B
Rust
// SPDX-License-Identifier: GPL-2.0
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//! Helper crate for KASAN testing.
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//!
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//! Provides behavior to check the sanitization of Rust code.
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use core::ptr::addr_of_mut;
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use kernel::prelude::*;
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/// Trivial UAF - allocate a big vector, grab a pointer partway through,
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/// drop the vector, and touch it.
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#[no_mangle]
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pub extern "C" fn kasan_test_rust_uaf() -> u8 {
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let mut v: KVec<u8> = KVec::new();
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for _ in 0..4096 {
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v.push(0x42, GFP_KERNEL).unwrap();
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}
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let ptr: *mut u8 = addr_of_mut!(v[2048]);
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drop(v);
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// SAFETY: Incorrect, on purpose.
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unsafe { *ptr }
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}
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