In the Linux kernel, the following vulnerability has been resolved:

RDMA/irdma: Prevent some integer underflows

My static checker complains that:

    drivers/infiniband/hw/irdma/ctrl.c:3605 irdma_sc_ceq_init()
    warn: can subtract underflow 'info->dev->hmc_fpm_misc.max_ceqs'?

It appears that "info->dev->hmc_fpm_misc.max_ceqs" comes from the firmware
in irdma_sc_parse_fpm_query_buf() so, yes, there is a chance that it could
be zero.  Even if we trust the firmware, it's easy enough to change the
condition just as a hardenning measure.

https://git.kernel.org/stable/c/6f6dbb819dfc1a35bcb8b709b5c83a3ea8beff75

https://git.kernel.org/stable/c/7340c3675d7ac946f4019b84cd7c64ed542dfe4c

https://git.kernel.org/stable/c/d52dab6e03550f9c97121b0c11c0a3ed78ee76a4

https://git.kernel.org/stable/c/f21056f15bbeacab7b4b87af232f5599d1f2bff1