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| author | Puranjay Mohan <[email protected]> | 2024-03-14 17:49:31 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <[email protected]> | 2024-03-14 19:04:45 +0000 |
| commit | 44d79142ede8162fd67bf8ca4ddbda1fbcfa94f1 (patch) | |
| tree | ea5ef659bcaa1dc72bb8258baa47b3a9e59fd2db /scripts/bpf_doc.py | |
| parent | net: txgbe: fix clk_name exceed MAX_DEV_ID limits (diff) | |
| download | kernel-44d79142ede8162fd67bf8ca4ddbda1fbcfa94f1.tar.gz kernel-44d79142ede8162fd67bf8ca4ddbda1fbcfa94f1.zip | |
bpf: Temporarily disable atomic operations in BPF arena
Currently, the x86 JIT handling PROBE_MEM32 tagged accesses is not
equipped to handle atomic accesses into PTR_TO_ARENA, as no PROBE_MEM32
tagging is performed and no handling is enabled for them.
This will lead to unsafety as the offset into arena will dereferenced
directly without turning it into a base + offset access into the arena
region.
Since the changes to the x86 JIT will be fairly involved, for now,
temporarily disallow use of PTR_TO_ARENA as the destination operand for
atomics until support is added to the JIT backend.
Fixes: 2fe99eb0ccf2 ("bpf: Add x86-64 JIT support for PROBE_MEM32 pseudo instructions.")
Reported-by: Kumar Kartikeya Dwivedi <[email protected]>
Signed-off-by: Puranjay Mohan <[email protected]>
Acked-by: Kumar Kartikeya Dwivedi <[email protected]>
Message-ID: <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Diffstat (limited to 'scripts/bpf_doc.py')
0 files changed, 0 insertions, 0 deletions