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SubjectRe: [PATCH] net: ipv6: fix invalid alloclen in __ip6_append_data
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On 3/8/22 21:01, David Ahern wrote:
> On 3/8/22 12:46 PM, Tadeusz Struk wrote:
>> That fails in the same way:
>>
>> skbuff: skb_over_panic: text:ffffffff83e7b48b len:65575 put:65575
>> head:ffff888101f8a000 data:ffff888101f8a088 tail:0x100af end:0x6c0
>> dev:<NULL>
>> ------------[ cut here ]------------
>> kernel BUG at net/core/skbuff.c:113!
>> invalid opcode: 0000 [#1] PREEMPT SMP KASAN
>> CPU: 0 PID: 1852 Comm: repro Not tainted
>> 5.17.0-rc7-00020-gea4424be1688-dirty #19
>> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1.fc35
>> RIP: 0010:skb_panic+0x173/0x175
>>
>> I'm not sure how it supposed to help since it doesn't change the
>> alloclen at all.
>
> alloclen is a function of fraglen and fraglen is a function of datalen.

Ok, but in this case it doesn't affect the alloclen and it still fails.

--
Thanks,
Tadeusz

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