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shm: kill bad client & document SIGBUS

This commit is contained in:
Victor Berger 2017-02-21 16:23:45 +01:00
parent 9d27537633
commit 0499c4b8ed
1 changed files with 8 additions and 0 deletions
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8
src/shm/mod.rs
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@ -25,6 +25,13 @@
//! } //! }
//! ); //! );
//! ``` //! ```
//!
//! **Note**
//!
//! This handler makes itself safe regading the client providing a wring size for the memory pool
//! by using a SIGBUS handler.
//!
//! If you are already using an handler for this signal, you probably don't want to use this handler.
use std::os::unix::io::RawFd; use std::os::unix::io::RawFd;
use std::sync::Arc; use std::sync::Arc;
@ -116,6 +123,7 @@ impl ShmGlobalToken {
if data.pool.with_data_slice(|slice| f(slice, data.data.clone())).is_err() { if data.pool.with_data_slice(|slice| f(slice, data.data.clone())).is_err() {
// SIGBUS error occured // SIGBUS error occured
buffer.post_error(wl_shm::Error::InvalidFd as u32, "Bad pool size.".into());
return Err(BufferAccessError::BadMap) return Err(BufferAccessError::BadMap)
} }
Ok(()) Ok(())