ntb_hw_switchtec: Fix shift-out-of-bounds in switchtec_ntb_mw_set_trans

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: ntb_hw_switchtec: Fix shift-out-of-bounds in switchtec_ntb_mw_set_trans There is a kernel API ntb_mw_clear_trans() would pass 0 to both addr and size. This would make xlate_pos negative. [ 23.734156] switchtec switchtec0: MW 0: part 0 addr 0x0000000000000000 size 0x0000000000000000 [ 23.734158] ================================================================================ [ 23.734172] UBSAN: shift-out-of-bounds in drivers/ntb/hw/mscc/ntb_hw_switchtec.c:293:7 [ 23.734418] shift exponent -1 is negative Ensuring xlate_pos is a positive or zero before BIT.

References

• https://git.kernel.org/stable/c/f56951f211f181410a383d305e8d370993e45294
• https://git.kernel.org/stable/c/5b6857bb3bfb0dae17fab1e42c1e82c204a508b1
• https://git.kernel.org/stable/c/2429bdf26a0f3950fdd996861e9c1a3873af1dbe
• https://git.kernel.org/stable/c/7ed22f8d8be26225a78cf5e85b2036421a6bf2d5
• https://git.kernel.org/stable/c/c61a3f2df162ba424be0141649a9ef5f28eaccc1
• https://git.kernel.org/stable/c/cb153bdc1812a3375639ed6ca5f147eaefb65349
• https://git.kernel.org/stable/c/36d32cfb00d42e865396424bb5d340fc0a28870d
• https://git.kernel.org/stable/c/0df2e03e4620548b41891b4e0d1bd9d2e0d8a39a
• https://git.kernel.org/stable/c/de203da734fae00e75be50220ba5391e7beecdf9