From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F08B2170A31 for ; Mon, 12 Aug 2024 13:31:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723469473; cv=none; b=AC5MHipLzdNsLPwhE7J8zBBNVqINkWPkIkysCVSuIXXFk3BtQvHOlR2NsZ7sDsLiQhwj1C+hjCYNvHFmixHhLJKoV87iC9La6TRzz/9WGYopFuZFQWaOnjV37kpYM5Inlw9XJTBV8ir8gOmNe+MEdHt94WhNlZXctpFjJA8CcwM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723469473; c=relaxed/simple; bh=4MSDwiezBX10BpCrtnTOXjYawS7qUs3kgNVU0jPxGOw=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=JITjo4cHZ2wkuWn3dHOdY/XLsTqlUmR4Dy78AAYfyV4sIrWm7926xdH2zZ38FWv7igiTfh++mVR6LCYx1tfkPIDXOBpGnfx3KR0U5XKMy2PAPpZb+FoPe98iD8nUBHkRqINpKQ7TS8II5a7F+cyUMzXNvsMPycqWSRD5O0FLcEU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.71 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f71.google.com with SMTP id ca18e2360f4ac-824c925d120so16638239f.3 for ; Mon, 12 Aug 2024 06:31:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723469471; x=1724074271; h=cc:to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=/2MDDwxPus6L9nBZUy+Tw4tNy6gY2TGHmSnbh9IyXkQ=; b=rVGvgz4Li1C4ulMrD0CD7AHY88RCUIaH2EEhnZ1XCNI4M3kd7xDe+xxydalnATJMBI vYGoAkKoUGfqikp40xlWgZead1X7TQ1VaxiDeskciJLYUMFfcr41sqXJXfBiZoRI39hI trH0rhnxQTrSWhZ1DswDIACJGgIhPpFgvnd/UFm1UwSKBDQNuTz9UsA8tZwSltoWxkfO PtjR7q9tsro0G8mioQlCDzxO0L/UkGwaZN51YTTAn2hRVsXV1Tp5B/0neJFJxq9Gu1ko JIeo+/tN/eRHN5A9OWX9MOUszk2s5weohTxJeJk9PVKoNVkfoixronxGY/cYL+4kBFby uofA== X-Forwarded-Encrypted: i=1; AJvYcCVN6yw9ipJ+Oc89pgObXFVayDTXsIysGzEnjw9Iysmo11Jk71pZttZrBXTPoMbudEhopgPGLu6BQMnPLMGy13FPZfXmNkVn X-Gm-Message-State: AOJu0YxWn1tx5pLk4F32LQO/zk0Ok4nnWKpFK031yFGcOo3e3+JHfM0y KLLLun6YMhffUk0l0qXA3kArpFhrpWxcpvKlSQGRKwNXPxvZ6bL4iQHIB/+czVCq4MkWrPqiATS 1hZ0Os2hj66Np4FKiXMUC716mqqC6hiXrdYtDJG+icB8CV4nhu6jZlD0= X-Google-Smtp-Source: AGHT+IED46H0i7+ooNgDxGsNBK5R2Bs4IMtUVYkHrx0D+KRy4Eo2VtW9NkIdkiwfJMYpasCVhJoidMhTngYiRwwiCA1DqzyHSnoJ Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:410b:b0:4c0:8165:c395 with SMTP id 8926c6da1cb9f-4ca9f7d4fc8mr4665173.3.1723469471016; Mon, 12 Aug 2024 06:31:11 -0700 (PDT) Date: Mon, 12 Aug 2024 06:31:10 -0700 In-Reply-To: <87ttfpx3z6.fsf@toke.dk> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000099fa6e061f7c815c@google.com> Subject: Re: [syzbot] [wireless?] KMSAN: uninit-value in skb_trim (2) From: syzbot To: toke@toke.dk Cc: kvalo@kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, toke@toke.dk Content-Type: text/plain; charset="UTF-8" > syzbot writes: > >> Hello, >> >> syzbot found the following issue on: >> >> HEAD commit: b446a2dae984 Merge tag 'linux_kselftest-fixes-6.11-rc3' of.. >> git tree: upstream >> console output: https://syzkaller.appspot.com/x/log.txt?x=13eb467d980000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=305509ad8eb5f9b8 >> dashboard link: https://syzkaller.appspot.com/bug?extid=98afa303be379af6cdb2 >> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 >> >> Unfortunately, I don't have any reproducer for this issue yet. >> >> Downloadable assets: >> disk image: https://storage.googleapis.com/syzbot-assets/49d96e53e1c4/disk-b446a2da.raw.xz >> vmlinux: https://storage.googleapis.com/syzbot-assets/f05350d128a7/vmlinux-b446a2da.xz >> kernel image: https://storage.googleapis.com/syzbot-assets/805c7d86a2db/bzImage-b446a2da.xz >> >> IMPORTANT: if you fix the issue, please add the following tag to the commit: >> Reported-by: syzbot+98afa303be379af6cdb2@syzkaller.appspotmail.com > > #syz test This crash does not have a reproducer. I cannot test it. > > diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c > index 0c7841f95228..f77cb743ca06 100644 > --- a/drivers/net/wireless/ath/ath9k/hif_usb.c > +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c > @@ -755,7 +755,7 @@ static void ath9k_hif_usb_reg_in_cb(struct urb *urb) > goto free_skb; > default: > skb_reset_tail_pointer(skb); > - skb_trim(skb, 0); > + __skb_trim(skb, 0); > > goto resubmit; > }