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Date:   Fri, 17 Jan 2020 13:38:01 -0500
From:   Arvind Sankar <>
To:     Eric Dumazet <>
Cc:     Arvind Sankar <>,
        Peter Zijlstra <>,
        Shaokun Zhang <>,
        David Miller <>,,,,,,,, Will Deacon <>
Subject: Re: [PATCH] net: optimize cmpxchg in ip_idents_reserve

On Fri, Jan 17, 2020 at 10:16:45AM -0800, Eric Dumazet wrote:
> Wasńt it the case back in 2016 already for linux-4.8 ?
> What will prevent someone to send another report to netdev/lkml ?
>  -fno-strict-overflow support is not a prereq for CONFIG_UBSAN.
> Fact that we kept in lib/ubsan.c and lib/test_ubsan.c code for 
> test_ubsan_add_overflow() and test_ubsan_sub_overflow() is disturbing.

No, it was bumped in 2018 in commit cafa0010cd51 ("Raise the minimum
required gcc version to 4.6"). That raised it from 3.2 -> 4.6.

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