From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.223.130]) (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 86CF5411F92 for ; Wed, 22 Jul 2026 18:17:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.135.223.130 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784744245; cv=none; b=PwuZbw7DnkGp6Pg5d85R6YPIkv2feS6e57XaUqJFU6EVEEXybMfYWAJVKzOe7ncPdAIQ81cHxhfmr94AQt7K1yfejgiOGh1z8Ly3KO0L9nkY4rZ9dWg5/1f44tk6+cz8kfGj86rKpl7pcB15D9BBCA0I1GZwRqmKoMU6dKPHp58= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784744245; c=relaxed/simple; bh=y4CsPeKcc5gVkdpTxsmKENeGor78GletN75a7gEDjWE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=LqryUBNRnYs+jgSbA1RskfHN2TRftPTvWsmA4NKdHGOpc+lN+SdBUAoVtufDrjc5DYNf4dIh027uPZzPJvjy1ZJ+ThcCVcUCOkwTkk7XUOPthWJh3ydckS5WEXCqr+b/jcTCORRER4jy7KwpiJhyZF6wDYWvHrmcqqC0pcmNGF4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de; spf=pass smtp.mailfrom=suse.de; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b=mdunHma4; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b=DzGackPb; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b=mdunHma4; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b=DzGackPb; arc=none smtp.client-ip=195.135.223.130 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="mdunHma4"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="DzGackPb"; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="mdunHma4"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="DzGackPb" Received: from imap1.dmz-prg2.suse.org (unknown [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 92CAE7ABED; Wed, 22 Jul 2026 18:17:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1784744241; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=ENvzRMI++xDBxdiLn/6V3FR44DKujsUdjHfJ118pvDE=; b=mdunHma4+0lGu8404oGwUQoGbjB1TGa83Cmot36UXwCm3cjUrcxZ5512TwDST6oCH9GK0G 9MRYDToVrTkoznYqJeoXtpy7KFgVLDjMPaEXntMwEvOdW1GSGMpbR+arUDIUqC5pImfljm BA854tgDKMqkxJ2Oe525ezdzwIxA3ek= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1784744241; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=ENvzRMI++xDBxdiLn/6V3FR44DKujsUdjHfJ118pvDE=; b=DzGackPb8puKHHzIKwVQLk063IyxBe01ZMvaOQK4rvTpcaEicYxwADJUIi4UfK3gSzL+9A 7xYZspbx/oqnDAAQ== Authentication-Results: smtp-out1.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1784744241; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=ENvzRMI++xDBxdiLn/6V3FR44DKujsUdjHfJ118pvDE=; b=mdunHma4+0lGu8404oGwUQoGbjB1TGa83Cmot36UXwCm3cjUrcxZ5512TwDST6oCH9GK0G 9MRYDToVrTkoznYqJeoXtpy7KFgVLDjMPaEXntMwEvOdW1GSGMpbR+arUDIUqC5pImfljm BA854tgDKMqkxJ2Oe525ezdzwIxA3ek= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1784744241; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=ENvzRMI++xDBxdiLn/6V3FR44DKujsUdjHfJ118pvDE=; b=DzGackPb8puKHHzIKwVQLk063IyxBe01ZMvaOQK4rvTpcaEicYxwADJUIi4UfK3gSzL+9A 7xYZspbx/oqnDAAQ== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 4DAD0779B0; Wed, 22 Jul 2026 18:17:21 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id AL25BjEJYWpRSwAAD6G6ig (envelope-from ); Wed, 22 Jul 2026 18:17:21 +0000 From: Gabriel Krisman Bertazi To: axboe@kernel.dk Cc: io-uring@vger.kernel.org, Gabriel Krisman Bertazi Subject: [PATCH liburing 0/2] Fix op_recv stack corruption Date: Wed, 22 Jul 2026 14:17:08 -0400 Message-ID: <20260722181710.79099-1-krisman@suse.de> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[99.99%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,imap1.dmz-prg2.suse.org:helo]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FUZZY_RATELIMITED(0.00)[rspamd.com]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_THREE(0.00)[3]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO X-Spam-Score: -2.80 X-Spam-Level: Jens, These two tests were failing on my debug infrastructure. It seems gcc hides the issue with a higher level of optimization, most likely by smarting out the local variable allocation straight to registers, which is why we don't observe it more often. When building with '-O0 -g3', I could trigger it 100% of time. Tested with kernel 7.2-rc4. Gabriel Krisman Bertazi (2): test/send_recvmsg: Preserve msghdr until op_recvmsg completes test/recv-msgall-stream: Preserve msghdr until op_recvmsg completes test/recv-msgall-stream.c | 14 +++++++------- test/send_recvmsg.c | 16 ++++++++-------- 2 files changed, 15 insertions(+), 15 deletions(-) -- 2.54.0