diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-08-24 00:58:04 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-08-24 01:27:14 +0300 |
| commit | 0947ae1121083d363d522ff7518ee72b55bd8d29 (patch) | |
| tree | cd59d759f7288a213751153a94c67dd6c1334a0a /mm/hugetlb_vmemmap.h | |
| parent | 7d6620f107bae6ed687ff07668e8e8f855487aa9 (diff) | |
| download | linux-0947ae1121083d363d522ff7518ee72b55bd8d29.tar.xz | |
bpf: Fix a data-race around bpf_jit_limit.
While reading bpf_jit_limit, it can be changed concurrently via sysctl,
WRITE_ONCE() in __do_proc_doulongvec_minmax(). The size of bpf_jit_limit
is long, so we need to add a paired READ_ONCE() to avoid load-tearing.
Fixes: ede95a63b5e8 ("bpf: add bpf_jit_limit knob to restrict unpriv allocations")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220823215804.2177-1-kuniyu@amazon.com
Diffstat (limited to 'mm/hugetlb_vmemmap.h')
0 files changed, 0 insertions, 0 deletions