[PATCH] register_chrdev_region() don't hand out the LOCAL/EXPERIMENTAL majors
As pointed out in http://bugzilla.kernel.org/show_bug.cgi?id=7922, dynamic chardev major allocation can hand out majors which LANANA has defined as being for local/experimental use. Cc: Torben Mathiasen <device@lanana.org> Cc: Greg KH <greg@kroah.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Tomas Klas <tomas.klas@mepatek.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -108,6 +108,13 @@ __register_chrdev_region(unsigned int major, unsigned int baseminor,
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/* temporary */
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if (major == 0) {
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for (i = ARRAY_SIZE(chrdevs)-1; i > 0; i--) {
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/*
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* Disallow the LANANA-assigned LOCAL/EXPERIMENTAL
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* majors
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*/
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if ((60 <= i && i <= 63) || (120 <= i && i <= 127) ||
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(240 <= i && i <= 254))
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continue;
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if (chrdevs[i] == NULL)
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break;
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}
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