3 Commits

Author	SHA1	Message	Date
Kumar Kartikeya Dwivedi	d402755ced	bpf: Unify resource leak checks ... There are similar checks for covering locks, references, RCU read sections and preempt_disable sections in 3 places in the verifer, i.e. for tail calls, bpf_ld_[abs, ind], and exit path (for BPF_EXIT and bpf_throw). Unify all of these into a common check_resource_leak function to avoid code duplication. Also update the error strings in selftests to the new ones in the same change to ensure clean bisection. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20241103225940.1408302-3-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>	2024-11-03 16:52:06 -08:00
Alexei Starovoitov	8ec3bf5c31	bpf: Add bpf_guard_preempt() convenience macro ... Add bpf_guard_preempt() macro that uses newly introduced bpf_preempt_disable/enable() kfuncs to guard a critical section. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20240424225529.16782-1-alexei.starovoitov@gmail.com Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>	2024-04-25 10:48:40 -07:00
Kumar Kartikeya Dwivedi	3134396f1c	selftests/bpf: Add tests for preempt kfuncs ... Add tests for nested cases, nested count preservation upon different subprog calls that disable/enable preemption, and test sleepable helper call in non-preemptible regions. 182/1 preempt_lock/preempt_lock_missing_1:OK 182/2 preempt_lock/preempt_lock_missing_2:OK 182/3 preempt_lock/preempt_lock_missing_3:OK 182/4 preempt_lock/preempt_lock_missing_3_minus_2:OK 182/5 preempt_lock/preempt_lock_missing_1_subprog:OK 182/6 preempt_lock/preempt_lock_missing_2_subprog:OK 182/7 preempt_lock/preempt_lock_missing_2_minus_1_subprog:OK 182/8 preempt_lock/preempt_balance:OK 182/9 preempt_lock/preempt_balance_subprog_test:OK 182/10 preempt_lock/preempt_global_subprog_test:OK 182/11 preempt_lock/preempt_sleepable_helper:OK 182 preempt_lock:OK Summary: 1/11 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20240424031315.2757363-3-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>	2024-04-24 09:47:49 -07:00