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| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2026-08-17 22:07:23 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2026-08-17 22:07:23 +0800 |
| commit | 37d545d12f21c4d50612ecaebd7ae1e5bf91b2d8 (patch) | |
| tree | b279888506bb2197cb6b6b6f44a3068dc333d24f /tools/lib/python | |
| parent | cd7e356b07a27e91394838cf3fb655862b519294 (diff) | |
| download | linux-37d545d12f21c4d50612ecaebd7ae1e5bf91b2d8.tar.gz linux-37d545d12f21c4d50612ecaebd7ae1e5bf91b2d8.zip | |
LoongArch: BPF: Refactor jump offset calculation in tail call
The old macro-based jmp_offset calculation derives the jump distance
from a stale prior-pass code stride, which can lead to wrong branch
offsets and soft lockups under extra JIT passes.
Fix this by calculating the offset directly on the absolute target:
"ctx->offset[insn + 1] - ctx->idx".
To avoid a false 16-bit range check abort during size estimation, add
a "ctx->image == NULL" guard to inject a safe dummy offset.
Cc: stable@vger.kernel.org
Fixes: cd39d9e6b7e4 ("LoongArch: BPF: Fix jump offset calculation in tailcall")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'tools/lib/python')
0 files changed, 0 insertions, 0 deletions