Messages in this thread | | | Subject | Re: signed integer overflow in atomic.h | From | Randy Dunlap <> | Date | Thu, 12 Aug 2021 08:07:44 -0700 |
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On 8/11/21 10:41 PM, Steve French wrote: > =============== > [ 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
from net/ipv4/route.c:
/* If UBSAN reports an error there, please make sure your compiler * supports -fno-strict-overflow before reporting it that was a bug * in UBSAN, and it has been fixed in GCC-8. */ return atomic_add_return(segs + delta, p_id) - segs;
-- ~Randy
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