On 9/5/23 21:41, Christoph Hellwig wrote:
> iomap_to_bh currently BUG()s when the passed in block number is not
> in the iomap. For file systems that have proper synchronization this
> should never happen and so far hasn't in mainline, but for block devices
> size changes aren't fully synchronized against ongoing I/O. Instead
> of BUG()ing in this case, return -EIO to the caller, which already has
> proper error handling. While we're at it, also return -EIO for an
> unknown iomap state instead of returning garbage.
>
> Fixes: 487c607df790 ("block: use iomap for writes to block devices")
> Reported-by: syzbot+4a08ffdf3667b36650a1@xxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
--
Damien Le Moal
Western Digital Research
