mirror of
https://github.com/torvalds/linux.git
synced 2026-01-25 15:03:52 +08:00
64b582ca88
As reported in [0], we may get a hang when formatting a XFS FS on a RAID0 drive. Commit73a768d5f9("block: factor out a blk_write_zeroes_limit helper") changed __blkdev_issue_write_zeroes() to read the max write zeroes value in the loop. This is not safe as max write zeroes may change in value. Specifically for the case of [0], the value goes to 0, and we get an infinite loop. Lift the limit reading out of the loop. [0] https://lore.kernel.org/linux-xfs/4d31268f-310b-4220-88a2-e191c3932a82@oracle.com/T/#t Fixes:73a768d5f9("block: factor out a blk_write_zeroes_limit helper") Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: John Garry <john.g.garry@oracle.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/20240815163228.216051-2-john.g.garry@oracle.com Signed-off-by: Jens Axboe <axboe@kernel.dk>