g_label_ntfs_taste: Abort taste is recsize == 0
This will avoid a 0-byte read (in g_read_data()) leading to a panic, if previously read data are erroneous. Suggested by: John-Mark Gurney <jmg@funkthat.com>
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=248058
@ -115,7 +115,7 @@ g_label_ntfs_taste(struct g_consumer *cp, char *label, size_t size)
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mftrecsz = (char)bf->bf_mftrecsz;
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recsize = (mftrecsz > 0) ? (mftrecsz * bf->bf_bps * bf->bf_spc) : (1 << -mftrecsz);
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if (recsize % pp->sectorsize != 0)
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if (recsize == 0 || recsize % pp->sectorsize != 0)
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goto done;
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voloff = bf->bf_mftcn * bf->bf_spc * bf->bf_bps +
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