| commit | 0edd6b64d1939e9e9168ff27947995bb7751db5d | [log] [tgz] |
|---|---|---|
| author | Peter Zijlstra <peterz@infradead.org> | Tue Apr 23 21:55:59 2019 +0200 |
| committer | Alexei Starovoitov <ast@kernel.org> | Thu Apr 25 17:20:06 2019 -0700 |
| tree | bda2ebb26824837370940415fa1857bb29d28d06 | |
| parent | 6dd7f14080473b655c247863e61b7c34424f0c83 [diff] |
bpf: Fix preempt_enable_no_resched() abuse Unless the very next line is schedule(), or implies it, one must not use preempt_enable_no_resched(). It can cause a preemption to go missing and thereby cause arbitrary delays, breaking the PREEMPT=y invariant. Cc: Roman Gushchin <guro@fb.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>