CVE-2024-57934 (GCVE-0-2024-57934)
Vulnerability from cvelistv5
Published
2025-01-21 12:01
Modified
2025-05-04 10:06
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: fgraph: Add READ_ONCE() when accessing fgraph_array[] In __ftrace_return_to_handler(), a loop iterates over the fgraph_array[] elements, which are fgraph_ops. The loop checks if an element is a fgraph_stub to prevent using a fgraph_stub afterward. However, if the compiler reloads fgraph_array[] after this check, it might race with an update to fgraph_array[] that introduces a fgraph_stub. This could result in the stub being processed, but the stub contains a null "func_hash" field, leading to a NULL pointer dereference. To ensure that the gops compared against the fgraph_stub matches the gops processed later, add a READ_ONCE(). A similar patch appears in commit 63a8dfb ("function_graph: Add READ_ONCE() when accessing fgraph_array[]").
References
Impacted products
Vendor Product Version
Linux Linux Version: 37238abe3cb47b8daaa8706c9949f67b2a705cf1
Version: 37238abe3cb47b8daaa8706c9949f67b2a705cf1
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