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Mon, 24 Aug 2026 11:03:38 -0400 X-MC-Unique: 2cWygwANNtm8DIgIiEXztA-1 X-Mimecast-MFC-AGG-ID: 2cWygwANNtm8DIgIiEXztA_1787583816 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 9B3BD1944F01; Mon, 24 Aug 2026 15:03:36 +0000 (UTC) Received: from fedora (unknown [10.44.32.9]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with SMTP id 4B0C630002ED; Mon, 24 Aug 2026 15:03:31 +0000 (UTC) Received: by fedora (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Mon, 24 Aug 2026 17:03:36 +0200 (CEST) Date: Mon, 24 Aug 2026 17:03:30 +0200 From: Oleg Nesterov To: Christian Brauner Cc: Jens Axboe , Peter Zijlstra , Alexander Viro , Jan Kara , Steve French , linux-fsdevel@vger.kernel.org, bpf@vger.kernel.org, linux-cifs@vger.kernel.org, linux-mm@kvack.org, stable@vger.kernel.org, Paulo Alcantara Subject: Re: [PATCH v2 0/5] Stop TIF_NOTIFY_SIGNAL from interrupting work that can't be restarted Message-ID: References: <20260824-work-tif_notify_signal-v2-0-6609e42b3157@kernel.org> MIME-Version: 1.0 In-Reply-To: <20260824-work-tif_notify_signal-v2-0-6609e42b3157@kernel.org> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-MFC-PROC-ID: oBSvJMV9T9mSaiyNYWK2x0RLAmr6QLAJteXxATwYmCg_1787583816 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: B08EA20009 X-Stat-Signature: jfc4ydp6c13bsh9akiw8r76zdzyxtmqg X-Rspam-User: X-HE-Tag: 1787583824-170408 X-HE-Meta: U2FsdGVkX180+HuD7JRK0QpxTU9wu5GCr2VBo8OXfPGluDB7kOFhsRzxW5ijfyq5tTW2psMkuGuPgCxt34Jwps1Xt6h2MRY2EQ2QzwDSnrg2uOrCnshftC3ppgQcYjAN1KfZE73oOE4JSjhBfmDLWUmgY5E5Vj5nzmzrxmlqaRWlnGD2aMFCZN82d+F2u+K6A2Cw/vo1V7CzsZRSgNWzlpKbzZcOVMiFq26MZDeCtq9vvc4gjgGnwQZrVq4wJ/zonylLOnoDoGZ+t4GAxPSm/VStlIyxqiaKFVbDjd2uf75oNq7zJUPNXQquX4pJMYdROB+UounKlk6y3IG7bwyl/Wk84tSEduNRfmVWAADcYP1qX6DbErYf51wI/E5hCv7Y8xgDa79W+XUT32FVNl5UjBKWf8ftn4aWdC0r/XgmNFIiSXvoMTZ6d+I9WPFk7c4IJPi9y78oT/3VMMRGhIHVLyJfCgZl8ObJ9b80yY9j6ovCS6iIHA+4Gs8911VopQoFveNKwy9wGwaO0quZ46w0PPn2NcWBZxp1p/43JYsrkyEfH3Qs/K4zo3o0d/uv08iZoynsSirOGomw0fgOGRWOw747SqzvLb4XMNV02Nj74ayCcRG9gmPkbfdfcIToQ5/2qfFrG613Xizhgrb8SzKyVThABiavh1QPu/nmzphQTZ1NhODi26KACmyQNGq92zAXSEL0wTRWDqYbHYrhU/kGNdWCRjP9JGlbfO4z++dqcKHXiTnQFgw8qi5KwBL2cQkfbskdXMQGc7pbvVM8bfvW39IHfdlHiYj4b3WD7rgK5S2I2p0TK++T+B8hDjUrUKvqZuWdhXMC3HRQed8TxWvMVbJ+8tJpUxK1p8b7BzQtgbOBupDnUOdhuLcRfwsWN7eoq/GgH+93VdUGlql+Abw6MkUqYeLCzkJNxrRbpI5TsGllGbvEobGs6AJ83MzlYtvgTKimCN+DM1TtDJ3tpfa EbXBDfe1 9vIx7oQTQzSS8EEOGHc0O2i/dH8sxujwoklvOI8RCVOpQCBobuKWsbPk4pKLC3oQPUeuxCZkRHcjtBriHmAN5p0OPLG+02sZ77X20NpDNYoc19nbI6O3ases77eskMBVOPLiBoKUju7Mtrpkagov2WDNtpmksiebL7FOzRpbxih3/uwIMkvmdeoRbZtOFb0HvOFz2XConJmJ9l7c+0Tga3+sNoN//FNCDqbPsPX70KeJEatSc8yWPG5qq59DLmH/M1O+yh9/XO4aGFa6JrzyYTo3JjTWU7lLj9m69Xspd7vAqUX0Y/MiEap0lB1M9MPxD/A8PrO+Ti9/p2pNvUh9gs1Un+0g6RNZJaNlsLv3AAGDx6babhBCWXDp4c7T8aqpt6RqtAD9lscZoXcIgjkptlAi5C9vKWe5JzeZdSZrzB/a8bGg= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 08/24, Christian Brauner wrote: > > Christian Brauner (5): > signal: allow taks to temporarily block TIF_NOTIFY_SIGNAL > coredump: prevent TIF_NOTIFY_SIGNAL from interrupting coredumps > selftests/coredump: test that TIF_NOTIFY_SIGNAL doesn't truncate a coredump > smb: prevent TIF_NOTIFY_SIGNAL from interrupting > pid_namespace: prevent TIF_NOTIFY_SIGNAL from interrupting the reaper For 1-2 and 4-5 feel free to add Reviewed-by: Oleg Nesterov ------------------------------------------------------------------------------- sigprocmask(SIG_BLOCK) in fs/smb/client/transport.c:__smb_send_rqst() looks a bit suspicious. Even if we forget about TIF_NOTIFY_SIGNAL, sigprocmask() doesn't necessarily clear TIF_SIGPENDING, nor it can protect from (say) do_signal_stop()->signal_wake_up() from a sub-thread. But this is offtopic. Oleg.