From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794047051; b=E3IJTQrICFfKXqOlntbKWYAvCItHav98b59T6Oey/9kr8jqSF5fTV/OmnRQttitrlwP8 FZtAdb7nr/xLhTr0ngz28Hfu+LRBYoN23zTCCB11yJgnyJK1jjOFJaRX3oZujYQSxjs74 dHE8x8OkJOHRKMEozYrSJqLlrWrYxkjAornKJcfAcQy8VexnFX0Cb41SqUSX5TDFCxUgd UWAfrZWOaPJA1fZEOFkrgiLk+0dBBKvgqZ7AzipIvqucCWpJQg+drn5OHoZDiQyCXz0D3 n8HziA/UUGICJoLFLC1Bd1bg6mbWwVt9rINdeRo7ekXVXTJUpAAgVs/Ub9Vvl82+Suw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794047051; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: MIME-Version:Content-Type:Content-Transfer-Encoding; bh=YjjsvtbfbzwzgX4K+pnmaP3RVENSpl6u/NoEFBDoqgA=; b=0tudPcD5Ezg+BP0D7tJzuK6hdGx16ImWSZZSqpCsL5Y0qqTSa0XF1974QC0S6JhzH6J9 EDQZmc/d3gUbX9EHMNFm/Yk5e7djRo+Z0ZiDcLTYF0u4fFPU0+L5vMzSqzEs5ws3BXzVe lKPjs+9F/eVMZLgM2xxh5qeHyYvRpx9qjMwnM073nDEon1jGKMLjOaq+t4RP4qoOnzRTL 3u9fugNbT+XLG7NyhxoGjZBltRe+A5Ye+uI2fAWeBfjR7ngsvM+mqHTJxNzduzQK7TAE5 mk7nMjFpaJ/pSC4TLE2delhpn2QlB6L3zWlVJEkAq0X7angD3O+ttg6v/uhsy7mvZRA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=M8cfIZzk; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 94436606A326 for ; Sat, 7 Nov 2026 10:24:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=M8cfIZzk Received: by smtp.kernel.org (Postfix) with ESMTPSA id EED3C1F0089F; Sat, 7 Nov 2026 10:24:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794047051; bh=YjjsvtbfbzwzgX4K+pnmaP3RVENSpl6u/NoEFBDoqgA=; h=From:To:Cc:Subject:Date; b=M8cfIZzkn0WcIUEPfF5VurHSSKXeBxwQW0pXBHIwz7EgzAxqK+h6eoHrxoBisiVKt EYjUsc2tolCK0d2LPdX4DflCRTRMft1DwwJyaIKNyQUI3FcehgDjvM1/jzzYV4lJ5N D6NwJnO70QoCjREsUQ5kxulTaajqH8elzjLALgZydBTefvL4NevD/99tku+aRy3yly trhCMffTKFqRdpZU8J621zpt3HE9RQRExwsD8MOvutFydjUVT7R0mMSwNdbbsl9R+E +5LhNgIsR9ZztXPSAlgT7fZfvKqIZwo1MbcVLWdJ6Rh1QF/Jdj+7CJ3isq4aWz1aRu TxDyv4Ln6wYkw== From: Sasha Levin To: dmitry.torokhov@gmail.com, kabel@voidship.net, jkosina@suse.com Cc: stable@vger.kernel.org Subject: FAILED: patch "[PATCH] Input: always accept EV_SYN in input_event()" failed to apply to 6.12-stable tree Date: Sat, 7 Nov 2026 05:24:09 -0500 Message-ID: <20261107052409-failed-6.12-c1d13bfdb9c7@kernel.org> X-Mailer: git-send-email 2.53.0 X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x c1d13bfdb9c75c2885d10332174a887349eb0b51 # git commit -s git send-email --to '' --in-reply-to '20261107052409-failed-6.12-c1d13bfdb9c7@kernel.org' --subject-prefix 'PATCH 6.12.y' 'HEAD^..' Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From c1d13bfdb9c75c2885d10332174a887349eb0b51 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Sun, 11 Oct 2026 23:12:40 -0700 Subject: [PATCH] Input: always accept EV_SYN in input_event() Commit 0cd587735205 ("Input: preallocate memory to hold event values") moved allocation of dev->vals into input_allocate_device(), which caused input core to accumulate events reported while seeding initial device state before input_register_device(). However, because EV_SYN is only set in dev->evbit during input_register_device() (and some drivers also overwrite dev->evbit directly before registration), any EV_SYN/SYN_REPORT events sent before registration were dropped by is_event_supported(), leaving those seeded events stuck in dev->vals until the next SYN_REPORT after registration. Always accept EV_SYN in input_event() and input_inject_event() without checking dev->evbit so input_sync() flushes dev->vals as intended. Reported-by: Karlos Abel , Fixes: 0cd587735205 ("Input: preallocate memory to hold event values") Cc: stable@vger.kernel.org Assisted-by: LLM Acked-by: Jiri Kosina Link: https://patch.msgid.link/asx50uz6iafsyAd5@google.com Signed-off-by: Dmitry Torokhov --- drivers/input/input.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/input/input.c b/drivers/input/input.c index 1cca6d48f5977..3e6af517c596b 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -391,7 +391,7 @@ void input_handle_event(struct input_dev *dev, void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) { - if (is_event_supported(type, dev->evbit, EV_MAX)) { + if (type == EV_SYN || is_event_supported(type, dev->evbit, EV_MAX)) { guard(spinlock_irqsave)(&dev->event_lock); input_handle_event(dev, type, code, value); } @@ -415,7 +415,7 @@ void input_inject_event(struct input_handle *handle, struct input_dev *dev = handle->dev; struct input_handle *grab; - if (is_event_supported(type, dev->evbit, EV_MAX)) { + if (type == EV_SYN || is_event_supported(type, dev->evbit, EV_MAX)) { guard(spinlock_irqsave)(&dev->event_lock); guard(rcu)(); -- 2.53.0