udf: Avoid overflow when session starts at large offset
When session starts beyond offset 2^31 the arithmetics in udf_check_vsd() would overflow. Make sure the computation is done in large enough type. Reported-by: Cezary Sliwa <sliwa@ifpan.edu.pl> Signed-off-by: Jan Kara <jack@suse.cz>
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@ -703,7 +703,7 @@ static loff_t udf_check_vsd(struct super_block *sb)
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else
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sectorsize = sb->s_blocksize;
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sector += (sbi->s_session << sb->s_blocksize_bits);
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sector += (((loff_t)sbi->s_session) << sb->s_blocksize_bits);
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udf_debug("Starting at sector %u (%ld byte sectors)\n",
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(unsigned int)(sector >> sb->s_blocksize_bits),
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