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Check file_table before use

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This commit is contained in:
Marsman1996
2025-06-18 16:28:58 +08:00
committed by Tate, Hongliang Tian
parent 00e6905d93
commit 2f097ab8f8
1 changed files with 7 additions and 6 deletions
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13
kernel/src/fs/procfs/pid/fd.rs
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@ -27,12 +27,13 @@ impl FdDirOps {
.parent(parent)
.build()
.unwrap();
file_table
.lock()
.as_ref()
.unwrap()
.read()
.register_observer(Arc::downgrade(&fd_inode) as _);
// Guard against the race condition when procfs is being accessed for an exiting process,
// whose file table may have already been released.
if let Some(file_table_ref) = file_table.lock().as_ref() {
file_table_ref
.read()
.register_observer(Arc::downgrade(&fd_inode) as _);
}
fd_inode
}