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authorWei Yongjun <weiyongjun1@huawei.com>2022-08-17 11:03:30 +0300
committerAndrew Morton <akpm@linux-foundation.org>2022-12-16 03:40:43 +0300
commit4acb9e5139f20c79eb08a95dc5a28186ae7a5088 (patch)
tree7efa51f1fe4b75261af8ab091e8bd614f94bed14 /lib/fault-inject.c
parenta7ebbbb159c181c696770feeb89bf0334aaff6d8 (diff)
downloadlinux-4acb9e5139f20c79eb08a95dc5a28186ae7a5088.tar.xz
fault-injection: skip stacktrace filtering by default
If FAULT_INJECTION_STACKTRACE_FILTER is enabled, the depth is default to 32. This means fail_stacktrace() will iter each entry's stacktrace, even if filter is not configured. This patch changes to quick return from fail_stacktrace() if stacktrace filter is not set. Link: https://lkml.kernel.org/r/20220817080332.1052710-3-weiyongjun1@huawei.com Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Cc: Akinobu Mita <akinobu.mita@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Isabella Basso <isabbasso@riseup.net> Cc: Josh Poimboeuf <jpoimboe@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib/fault-inject.c')
-rw-r--r--lib/fault-inject.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/fault-inject.c b/lib/fault-inject.c
index 1421818c9ef7..fecc4d8ca32a 100644
--- a/lib/fault-inject.c
+++ b/lib/fault-inject.c
@@ -71,7 +71,7 @@ static bool fail_stacktrace(struct fault_attr *attr)
int n, nr_entries;
bool found = (attr->require_start == 0 && attr->require_end == ULONG_MAX);
- if (depth == 0)
+ if (depth == 0 || (found && !attr->reject_start && !attr->reject_end))
return found;
nr_entries = stack_trace_save(entries, depth, 1);