attempt to access beyond end of device

[Jan Niehusmann <jan@gondor.com>]

ll_rw_blk.c: generic_make_request() contains the following code:

if (maxsector < count || maxsector - count < sector) {
	bh->b_state &= (1 << BH_Lock) | (1 << BH_Mapped);
	if (blk_size[major][MINOR(bh->b_rdev)]) {

		/* This may well happen - the kernel calls bread()
		   without checking the size of the device, e.g.,
		   when mounting a device. */
		printk(KERN_INFO
		       "attempt to access beyond end of device\n");
		printk(KERN_INFO "%s: rw=%d, want=%d, limit=%d\n",
		       kdevname(bh->b_rdev), rw,
		       (sector + count)>>1,
		       blk_size[major][MINOR(bh->b_rdev)]);
	}
	bh->b_end_io(bh, 0);
	return;
}


That means that if blk_size[major][MINOR(bh->b_rdev)] == 0, the request
is canceled but no message is printed. Shouldn't there be a warning message?

Jan





-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/