On Mon, 2 Dec 2024 10:32:04 +0100, Alexander Potapenko wrote: > On Sun, Dec 1, 2024 at 4:27 PM Shigeru Yoshida <syoshida@xxxxxxxxxx> wrote: >> >> KMSAN reported a use-after-free issue in eth_skb_pkt_type()[1]. The >> cause of the issue was that eth_skb_pkt_type() accessed skb's data >> that didn't contain an Ethernet header. This occurs when >> bpf_prog_test_run_xdp() passes an invalid value as the user_data >> argument to bpf_test_init(). > > Hi Shigeru, > > Thanks for taking care of this! > > Am I understanding right that this bug was reported by your own > syzkaller instance? Hi Alexander, Thank you for your comment! Yes, this issue was identified by running my own syzkaller locally. I added the "Reported-by: syzkaller <syzkaller@xxxxxxxxxxxxxxxx>" tag to give credit to the syzkaller community. > Otherwise, if the report originates from syzkaller.appspot.com, could > you please append the bug hash to the Reported-by: tag? I checked syzkaller.appspot.com, but this issue does not seem to be reported. Thanks, Shigeru
