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[2003:f6:f71d:1000:fa63:3fff:fe02:74c]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43d200fad59sm103188675e9.26.2025.03.17.04.25.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Mar 2025 04:25:11 -0700 (PDT) From: Johannes Thumshirn To: linux-btrfs@vger.kernel.org Cc: Naohiro Aota , Damien Le Moal , Josef Bacik , David Sterba , Johannes Thumshirn Subject: [PATCH 2/2] btrfs: zoned: fix zone finishing with missing devices Date: Mon, 17 Mar 2025 12:24:59 +0100 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Johannes Thumshirn If do_zone_finish() is called with a filesystem that has missing devices (e.g. a RAID file system mounted in degraded mode) it is accessing the btrfs_device::zone_info pointer, which will not be set if the device in question is missing. Check if the device is present (by checking if it has a valid block device pointer associated) and if not, skip zone finishing for it. Fixes: 4dcbb8ab31c1 ("btrfs: zoned: make zone finishing multi stripe capable") Signed-off-by: Johannes Thumshirn --- fs/btrfs/zoned.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index 8924f58919e8..7c502192cd6b 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -2274,6 +2274,9 @@ static int do_zone_finish(struct btrfs_block_group *block_group, bool fully_writ struct btrfs_zoned_device_info *zinfo = device->zone_info; unsigned int nofs_flags; + if (!device->bdev) + continue; + if (zinfo->max_active_zones == 0) continue;