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| author | Alexei Starovoitov <ast@kernel.org> | 2024-06-17 20:18:12 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2024-06-18 18:19:46 +0300 |
| commit | b90d77e5fd784ada62ddd714d15ee2400c28e1cf (patch) | |
| tree | 9586302ff2733e360769a93f8e73cf34744475c6 /kernel/trace/power-traces.c | |
| parent | bfbcb2c9d2978a28e9f0a77100170dc14fcf7c79 (diff) | |
| download | linux-b90d77e5fd784ada62ddd714d15ee2400c28e1cf.tar.xz | |
bpf: Fix remap of arena.
The bpf arena logic didn't account for mremap operation. Add a refcnt for
multiple mmap events to prevent use-after-free in arena_vm_close.
Fixes: 317460317a02 ("bpf: Introduce bpf_arena.")
Reported-by: Pengfei Xu <pengfei.xu@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Barret Rhoden <brho@google.com>
Tested-by: Pengfei Xu <pengfei.xu@intel.com>
Closes: https://lore.kernel.org/bpf/Zmuw29IhgyPNKnIM@xpf.sh.intel.com
Link: https://lore.kernel.org/bpf/20240617171812.76634-1-alexei.starovoitov@gmail.com
Diffstat (limited to 'kernel/trace/power-traces.c')
0 files changed, 0 insertions, 0 deletions