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Thu, 26 Mar 2026 14:06:50 +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 5necJno9xWm/DgAAD6G6ig (envelope-from ); Thu, 26 Mar 2026 14:06:50 +0000 Received: by quack3.suse.cz (Postfix, from userid 1000) id 5286DA0976; Thu, 26 Mar 2026 15:06:42 +0100 (CET) From: Jan Kara To: Cc: Christoph Hellwig , Jan Kara Subject: [PATCH v4 0/2] udf: Fix race between file type conversion and writeback Date: Thu, 26 Mar 2026 15:06:30 +0100 Message-ID: <20260326140257.15908-1-jack@suse.cz> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=948; i=jack@suse.cz; h=from:subject:message-id; bh=0eeXOZEJhaNA/5T98rqkNwx5KkpMrY5XFuLG3Gzq0TU=; b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBpxT1l6amHakTuW6+FNFnZkL897GB2AeOmqLVS3 7MJEp6GKG+JATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCacU9ZQAKCRCcnaoHP2RA 2bUhCADC7FbbPBnPCidXoHHe44mo0z89Kf/P44D49FSvubfz9kVXAQQEWM400SY25r9Qyiq1GCz jijKLQNPAJ+cockflpnxiFOFLpHQJEDGczSnOTAiWJZXivP8q5qFWsRSWgCBWlVPFNjMED9h3EF J9cL75jiMxet0Lv0IRluOW90wDsIW/g7uYoOEJcyV/cue3m+TcxjSQOd4rw2ytp4wadg20Wb3B/ mX5eTsj4ZynHGWYt4dFjNVdw7FAlatHJfi5XXpTuhNxz8tnFJFQgKrnqD+P3vX0wUfI4FPt7clC aiHJf7bIJhAV6Q2rqG32e4REBBJotOfsnawVbB3Ed+JYU4zU X-Developer-Key: i=jack@suse.cz; a=openpgp; fpr=93C6099A142276A28BBE35D815BC833443038D8C Content-Transfer-Encoding: 8bit X-Spam-Score: -2.79 X-Spam-Level: X-Spamd-Result: default: False [-2.79 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.19)[-0.955]; 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)[]; FROM_EQ_ENVFROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; RCVD_TLS_LAST(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; RCPT_COUNT_THREE(0.00)[3]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.cz:mid] X-Spam-Flag: NO Hello, here is the third version of patches to fix a race between conversion of UDF file from inline format to the standard format and writeback resulting in possible memory corruption. As Christoph didn't like opencoding folio_prepare_writeback() in UDF either, this version provides mpage_writepages() variant with a per-folio callback instead. Review/Acks are welcome in particular for the first patch. I'd like to push the fix to Linus soon as it's kind of nasty issue. Changes since v3: * Create mpage_writepages() variant with a callback instead of opencoding. Changes since v2: * Opencoded folio_prepare_writeback() in udf instead of exporting it Changes since v1: * Fix crash in udf_writepages() when file had no folio in the mapping Honza Previous versions: Link: http://lore.kernel.org/r/20260323162617.2421-1-jack@suse.cz # v1 Link: http://lore.kernel.org/r/20260324105132.30490-1-jack@suse.cz # v2