linux-kernel - signed integer overflow in atomic.h

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Message-ID: <CAH2r5msrRdGmFGht+rN7_UgkmrpT8eaAoQ46EyLvxhm7M-fKmg@mail.gmail.com>
Date:   Thu, 12 Aug 2021 00:41:29 -0500
From:   Steve French <smfrench@...il.com>
To:     LKML <linux-kernel@...r.kernel.org>
Subject: signed integer overflow in atomic.h

===============
[   28.345189] UBSAN: signed-integer-overflow in
./arch/x86/include/asm/atomic.h:165:11
[   28.345196] 484501395 + 2024361625 cannot be represented in type 'int'
[   28.345202] CPU: 6 PID: 987 Comm: nmbd Not tainted 5.11.22 #1
[   28.345208] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
[   28.345212] Call Trace:
[   28.345218]  dump_stack+0x8d/0xb5
[   28.345233]  ubsan_epilogue+0x5/0x50
[   28.345242]  handle_overflow+0xa3/0xb0
[   28.345257]  ? rcu_read_lock_sched_held+0x39/0x80
[   28.345270]  ip_idents_reserve+0x8d/0xb0
[   28.345283]  __ip_select_ident+0x3f/0x70
[   28.345292]  __ip_make_skb+0x279/0x450
[   28.345302]  ? ip_reply_glue_bits+0x40/0x40
[   28.345314]  ip_make_skb+0x10d/0x130
[   28.345326]  ? ip_route_output_key_hash+0xee/0x190
[   28.345344]  udp_sendmsg+0x79b/0x13b0
[   28.345365]  ? ip_reply_glue_bits+0x40/0x40
[   28.345403]  ? find_held_lock+0x29/0xb0
[   28.345420]  ? sock_sendmsg+0x54/0x60
[   28.345426]  sock_sendmsg+0x54/0x60


-- 
Thanks,

Steve