6.6-stable patches

added patches:
	selftests-bpf-remove-flaky-test_btf_id-test.patch

diff --git a/queue-6.6/selftests-bpf-remove-flaky-test_btf_id-test.patch b/queue-6.6/selftests-bpf-remove-flaky-test_btf_id-test.patch
new file mode 100644 (file)
index 0000000..05baaf4
--- /dev/null
+++ b/queue-6.6/selftests-bpf-remove-flaky-test_btf_id-test.patch
@@ -0,0 +1,53 @@
+From 56925f389e152dcb8d093435d43b78a310539c23 Mon Sep 17 00:00:00 2001
+From: Yonghong Song <yonghong.song@linux.dev>
+Date: Thu, 14 Dec 2023 12:38:20 -0800
+Subject: selftests/bpf: Remove flaky test_btf_id test
+
+From: Yonghong Song <yonghong.song@linux.dev>
+
+commit 56925f389e152dcb8d093435d43b78a310539c23 upstream.
+
+With previous patch, one of subtests in test_btf_id becomes
+flaky and may fail. The following is a failing example:
+
+  Error: #26 btf
+  Error: #26/174 btf/BTF ID
+    Error: #26/174 btf/BTF ID
+    btf_raw_create:PASS:check 0 nsec
+    btf_raw_create:PASS:check 0 nsec
+    test_btf_id:PASS:check 0 nsec
+    ...
+    test_btf_id:PASS:check 0 nsec
+    test_btf_id:FAIL:check BTF lingersdo_test_get_info:FAIL:check failed: -1
+
+The test tries to prove a btf_id not available after the map is closed.
+But btf_id is freed only after workqueue and a rcu grace period, compared
+to previous case just after a rcu grade period.
+Depending on system workload, workqueue could take quite some time
+to execute function bpf_map_free_deferred() which may cause the test failure.
+Instead of adding arbitrary delays, let us remove the logic to
+check btf_id availability after map is closed.
+
+Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
+Link: https://lore.kernel.org/r/20231214203820.1469402-1-yonghong.song@linux.dev
+Signed-off-by: Alexei Starovoitov <ast@kernel.org>
+Signed-off-by: Samasth Norway Ananda <samasth.norway.ananda@oracle.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ tools/testing/selftests/bpf/prog_tests/btf.c |    5 -----
+ 1 file changed, 5 deletions(-)
+
+--- a/tools/testing/selftests/bpf/prog_tests/btf.c
++++ b/tools/testing/selftests/bpf/prog_tests/btf.c
+@@ -4630,11 +4630,6 @@ static int test_btf_id(unsigned int test
+       /* The map holds the last ref to BTF and its btf_id */
+       close(map_fd);
+       map_fd = -1;
+-      btf_fd[0] = bpf_btf_get_fd_by_id(map_info.btf_id);
+-      if (CHECK(btf_fd[0] >= 0, "BTF lingers")) {
+-              err = -1;
+-              goto done;
+-      }
+ 
+       fprintf(stderr, "OK");
+ 

diff --git a/queue-6.6/series b/queue-6.6/series
index c947a65df581b775dfcd01c614744054f8fae7c1..57c795154adc04cba39ea27c9337c513e56bef82 100644 (file)
--- a/queue-6.6/series
+++ b/queue-6.6/series
@@ -319,3 +319,4 @@ mm-kmsan-fix-infinite-recursion-due-to-rcu-critical-section.patch
 revert-drm-amd-display-disable-psr-su-on-parade-0803-tcon-again.patch
 drm-msm-dsi-enable-runtime-pm.patch
 loongarch-smp-call-rcutree_report_cpu_starting-at-tlb_init.patch
+selftests-bpf-remove-flaky-test_btf_id-test.patch