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Date: Fri, 13 Jul 2012 16:51:55 -0400 From: Jeff Moyer <jmoyer@...hat.com> To: Jan Kara <jack@...e.cz> Cc: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>, "Steven J. Magnani" <steve@...idescorp.com>, Stevie Trujillo <stevie.trujillo@...il.com>, linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk> Subject: Re: mount -o loop with truncated dosdisk.img uses 100% cpu and can't be killed Jan Kara <jack@...e.cz> writes: >> It looks like the bug of __getblk_slow(). If requested block was beyond >> end of device, __find_get_block() will find buffer_mapped()'s buffer, >> but block >= end_block is unmapped. So, it can be loop. >> >> The following patch fixes it? If it fix, there are some options to check >> it. >> >> a) Check it like this patch and warn. >> b) (a), but without warn. >> c) Check it in init_page_buffers() and return -EIO or such >> >> Well, anyway, Cc to Jens. >> >> Signed-off-by: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp> > I think Jeff Moyer has sent a similar fix recently. It may even be > already queued in Jens' tree. Jeff? A fix for this has now been committed in Linus' tree: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=91f68c89d8f35fe98ea04159b9a3b42d0149478f Cheers, Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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