From: Triet Hoang <triet.hoang.dev@gmail.com>
To: linux-perf-users@vger.kernel.org
Cc: peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
namhyung@kernel.org, mark.rutland@arm.com,
alexander.shishkin@linux.intel.com, jolsa@kernel.org,
irogers@google.com, adrian.hunter@intel.com,
james.clark@linaro.org, linux-kernel@vger.kernel.org,
Triet Hoang <triet.hoang.dev@gmail.com>
Subject: [PATCH] perf unwind: handle allocation failure in libdw__get_entries()
Date: Tue, 18 Aug 2026 14:24:00 +0000 [thread overview]
Message-ID: <20260818142400.729633-1-triet.hoang.dev@gmail.com> (raw)
Check the return value of zalloc() before dereferencing the allocated
dwfl_ui_ti structure.
Return -ENOMEM when the allocation fails to avoid a NULL pointer
dereference.
Signed-off-by: Triet Hoang <triet.hoang.dev@gmail.com>
---
tools/perf/util/unwind-libdw.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c
index 7f35042be567..ff36552ca175 100644
--- a/tools/perf/util/unwind-libdw.c
+++ b/tools/perf/util/unwind-libdw.c
@@ -379,6 +379,9 @@ int libdw__get_entries(unwind_entry_cb_t cb, void *arg,
dwfl = dwfl_ui_ti->dwfl;
} else {
dwfl_ui_ti = zalloc(sizeof(*dwfl_ui_ti));
+ if (!dwfl_ui_ti)
+ return -ENOMEM;
+
dwfl = dwfl_begin(&offline_callbacks);
if (!dwfl)
goto out;
--
2.53.0
next reply other threads:[~2026-08-18 14:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-18 14:24 Triet Hoang [this message]
2026-08-18 14:29 ` [PATCH] perf unwind: handle allocation failure in libdw__get_entries() sashiko-bot
2026-08-18 14:48 ` [PATCH v2] " Triet Hoang
2026-08-18 14:59 ` sashiko-bot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260818142400.729633-1-triet.hoang.dev@gmail.com \
--to=triet.hoang.dev@gmail.com \
--cc=acme@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=alexander.shishkin@linux.intel.com \
--cc=irogers@google.com \
--cc=james.clark@linaro.org \
--cc=jolsa@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-perf-users@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox