From nobody Sun Feb 8 12:42:54 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5C0901FCFE6; Tue, 4 Mar 2025 08:57:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741078624; cv=none; b=PigVuNaBS7A8IFzAM/mPR/a1nUWEg2uym+9AKCGepVge6ti8o7BbIqzCkzVTAxHlJQhvXhLG71w9DDaVv4nFe4+Gg6w+HnE5aeVm6f9JLpgrtCS1aX2LlH2TlQTngVn/dbx9DwJ4JHAgXKCSo92r/qxZLR2eWdsHDIGCl4BScvM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741078624; c=relaxed/simple; bh=hKQTFZRFDN/O5T2zAGzpJrdHT2jYkHJvGFuIvzU+i6c=; h=Date:From:To:Subject:Cc:In-Reply-To:References:MIME-Version: Message-ID:Content-Type; b=usnsY3UJ4AVKZyu1pryHt+BxO+A5QF5QkCxr34XTB4etBlN+6seIxcbR8FARr1yNGrct0bREy6iV1GW1qYHguK84dlEtGEGgqrwqDygC/EOP6CUY4YU3//16OkceDN8tJx9EQM+BKv1gbjA35doFbwvXbOLPbd1kN4wuVN3Y5BA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=N1EDslUa; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=PIkoIqw/; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="N1EDslUa"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="PIkoIqw/" Date: Tue, 04 Mar 2025 08:57:01 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1741078622; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=n3a+oAlC9i//khl/aFyDO/bKBt2rW1zbJsXBJ3mabvY=; b=N1EDslUaMix6nwF9LEKES12tyxVTzq9BWYg3DO6SHlo/H8eLg8cm1y0HiQilYQH2/yUW+d MfwX5SD59Tj/wwFX2Pe+vYzZpbod36QMceg2YAPlaH7KbZb0mvqO+oyfMuyFtx81gug5Wg fvBOyckY4Nwz4EHnBiAV4/T1zrMGC3O9S7hydDAaeI4+5E4fSykTM+lHLZfBHXhRGloO/w ftHcD1n+Gk2+HqqsAbi2Zz78iDOqt8gnDORg2Ty8JgGtCC4hB/y65rmmOmxadzpBjOrm2X L62CdAypF4ceTjn2u17K4TkdhMqDQIVD3+j30v50X8w1hgMg6W1cdgW7XHpS5Q== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1741078622; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=n3a+oAlC9i//khl/aFyDO/bKBt2rW1zbJsXBJ3mabvY=; b=PIkoIqw/H3CH96dOxndQRXfe4+hlKPH43s3gb+88cpvTyzv2z4iF0VjGncDc4oHxjDdo2b 4WpPmS4iSD9Ul7CA== From: "tip-bot2 for Peter Zijlstra" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: perf/core] perf/bpf: Robustify perf_event_free_bpf_prog() Cc: "Peter Zijlstra (Intel)" , Ingo Molnar , Ravi Bangoria , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20241104135518.978956692@infradead.org> References: <20241104135518.978956692@infradead.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <174107862138.14745.820346394726926625.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Precedence: bulk Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The following commit has been merged into the perf/core branch of tip: Commit-ID: c5b96789575b670b1e776071bb243e0ed3d3abaa Gitweb: https://git.kernel.org/tip/c5b96789575b670b1e776071bb243e0ed= 3d3abaa Author: Peter Zijlstra AuthorDate: Mon, 04 Nov 2024 14:39:22 +01:00 Committer: Ingo Molnar CommitterDate: Tue, 04 Mar 2025 09:42:59 +01:00 perf/bpf: Robustify perf_event_free_bpf_prog() Ensure perf_event_free_bpf_prog() is safe to call a second time; notably without making any references to event->pmu when there is no prog left. Note: perf_event_detach_bpf_prog() might leave a stale event->prog Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Reviewed-by: Ravi Bangoria Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: Andrii Nakryiko Link: https://lore.kernel.org/r/20241104135518.978956692@infradead.org --- kernel/events/core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/events/core.c b/kernel/events/core.c index 525c64e..ab4e497 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -10905,6 +10905,9 @@ int perf_event_set_bpf_prog(struct perf_event *even= t, struct bpf_prog *prog, =20 void perf_event_free_bpf_prog(struct perf_event *event) { + if (!event->prog) + return; + if (!perf_event_is_tracing(event)) { perf_event_free_bpf_handler(event); return;