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Date:   Sun, 31 Oct 2021 21:21:48 +0300
From:   Pavel Skripkin <>
To:     syzbot <>,,,,,,,,,
Subject: Re: [syzbot] KASAN: slab-out-of-bounds Read in hci_le_meta_evt (2)

On 10/31/21 20:40, syzbot wrote:
> Hello,
> syzbot found the following issue on:
> HEAD commit:    119c85055d86 Merge tag 'powerpc-5.15-6' of git://git.kerne..
> git tree:       upstream
> console output:
> kernel config:
> dashboard link:
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:
> C reproducer:
> Bisection is inconclusive: the issue happens on the oldest tested release.
> bisection log:
> final oops:
> console output:
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by:
> Bluetooth: hci0: unknown advertising packet type: 0x90
> Bluetooth: hci0: Dropping invalid advertising data

If packet has invalid length we should check if we won't go beyond 
skb->tail on next iteration.

#syz test
git:// master

With regards,
Pavel Skripkin

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