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os/vfs.h: fix possible nullptr dereference

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Fixes #3694
This commit is contained in:
Norman Feske 2020-03-13 19:34:53 +01:00
parent 7f5186d489
commit c2cf0ae8c6
1 changed files with 5 additions and 1 deletions
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6
repos/os/include/os/vfs.h
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@ -613,7 +613,11 @@ class Genode::Watcher
_watch(fs, alloc, rel_path, handler);
}
~Watcher() { _handle->fs().close(_handle); }
~Watcher()
{
if (_handle)
_handle->fs().close(_handle);
}
};