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e52349a5ea
A file system sets STATX_DIOALIGN with zeroed alignments when the file can't be used for direct I/O. The zero underflowed to UINT_MAX and triggered a queue limits validation warning. Fall back to the block device's limits when dio_mem_align isn't reported. A file system with a block size larger than PAGE_SIZE may also report a memory alignment that can't be expressed as a queue limit. File systems fall back to buffered I/O for requests that don't meet their alignment, so cap the reported limit to the largest possible value. Fixes:6c8dec275c("loop: set dma_alignment from the backing file for direct I/O") Fixes:c5059c1af2("zloop: set dma_alignment from the backing files for direct I/O") Reported-by: syzbot+ac00e7bf7ac8c91af921@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=ac00e7bf7ac8c91af921 Signed-off-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://patch.msgid.link/20260810164218.3721636-1-kbusch@meta.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2357 lines
59 KiB
2357 lines
59 KiB