* Re: KASAN: use-after-free Read in skb_release_data (2) [not found] <000000000000da6059059fcfdcf9@google.com> @ 2020-03-31 17:36 ` syzbot 2020-03-31 17:41 ` Greg KH 0 siblings, 1 reply; 4+ messages in thread From: syzbot @ 2020-03-31 17:36 UTC (permalink / raw) To: davem, festevam, gregkh, grundler, hayeswang, johan.hedberg, kernel, linux-arm-kernel, linux-bluetooth, linux-imx, linux-kernel, linux-usb, marcel, nishadkamdar, peter.chen, pmalani, s.hauer, shawnguo, syzkaller-bugs syzbot suspects this bug was fixed by commit: commit d9958306d4be14f4c7466242b38ed3893a7b1386 Author: Nishad Kamdar <nishadkamdar@gmail.com> Date: Sun Mar 15 10:55:07 2020 +0000 USB: chipidea: Use the correct style for SPDX License Identifier bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16d4940be00000 start commit: 63623fd4 Merge tag 'for-linus' of git://git.kernel.org/pub.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=5d2e033af114153f dashboard link: https://syzkaller.appspot.com/bug?extid=a66a7c2e996797bb4acb syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c25a81e00000 If the result looks correct, please mark the bug fixed by replying with: #syz fix: USB: chipidea: Use the correct style for SPDX License Identifier For information about bisection process see: https://goo.gl/tpsmEJ#bisection ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KASAN: use-after-free Read in skb_release_data (2) 2020-03-31 17:36 ` KASAN: use-after-free Read in skb_release_data (2) syzbot @ 2020-03-31 17:41 ` Greg KH 2020-03-31 17:44 ` Grant Grundler 0 siblings, 1 reply; 4+ messages in thread From: Greg KH @ 2020-03-31 17:41 UTC (permalink / raw) To: syzbot Cc: davem, festevam, grundler, hayeswang, johan.hedberg, kernel, linux-arm-kernel, linux-bluetooth, linux-imx, linux-kernel, linux-usb, marcel, nishadkamdar, peter.chen, pmalani, s.hauer, shawnguo, syzkaller-bugs On Tue, Mar 31, 2020 at 10:36:01AM -0700, syzbot wrote: > syzbot suspects this bug was fixed by commit: > > commit d9958306d4be14f4c7466242b38ed3893a7b1386 > Author: Nishad Kamdar <nishadkamdar@gmail.com> > Date: Sun Mar 15 10:55:07 2020 +0000 > > USB: chipidea: Use the correct style for SPDX License Identifier > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16d4940be00000 > start commit: 63623fd4 Merge tag 'for-linus' of git://git.kernel.org/pub.. > git tree: upstream > kernel config: https://syzkaller.appspot.com/x/.config?x=5d2e033af114153f > dashboard link: https://syzkaller.appspot.com/bug?extid=a66a7c2e996797bb4acb > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c25a81e00000 > > If the result looks correct, please mark the bug fixed by replying with: > > #syz fix: USB: chipidea: Use the correct style for SPDX License Identifier I really doubt a comment change fixed a syzbot bug :) ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KASAN: use-after-free Read in skb_release_data (2) 2020-03-31 17:41 ` Greg KH @ 2020-03-31 17:44 ` Grant Grundler 2020-04-01 9:12 ` Dmitry Vyukov 0 siblings, 1 reply; 4+ messages in thread From: Grant Grundler @ 2020-03-31 17:44 UTC (permalink / raw) To: Greg KH Cc: syzbot, David Miller, festevam, Grant Grundler, Hayes Wang, johan.hedberg, kernel, linux-arm-kernel, linux-bluetooth, linux-imx, LKML, linux-usb, marcel, nishadkamdar, peter.chen, Prashant Malani, Sascha Hauer, shawnguo, syzkaller-bugs On Tue, Mar 31, 2020 at 10:41 AM Greg KH <gregkh@linuxfoundation.org> wrote: > > On Tue, Mar 31, 2020 at 10:36:01AM -0700, syzbot wrote: > > syzbot suspects this bug was fixed by commit: > > > > commit d9958306d4be14f4c7466242b38ed3893a7b1386 > > Author: Nishad Kamdar <nishadkamdar@gmail.com> > > Date: Sun Mar 15 10:55:07 2020 +0000 > > > > USB: chipidea: Use the correct style for SPDX License Identifier > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16d4940be00000 > > start commit: 63623fd4 Merge tag 'for-linus' of git://git.kernel.org/pub.. > > git tree: upstream > > kernel config: https://syzkaller.appspot.com/x/.config?x=5d2e033af114153f > > dashboard link: https://syzkaller.appspot.com/bug?extid=a66a7c2e996797bb4acb > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c25a81e00000 > > > > If the result looks correct, please mark the bug fixed by replying with: > > > > #syz fix: USB: chipidea: Use the correct style for SPDX License Identifier > > I really doubt a comment change fixed a syzbot bug :) Just as I don't believe the bug was caused by pmalani's patch to r8152. syzbot is just having trouble automatically bisecting/tracking this bug since it appears only intermittently. cheers, grant ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KASAN: use-after-free Read in skb_release_data (2) 2020-03-31 17:44 ` Grant Grundler @ 2020-04-01 9:12 ` Dmitry Vyukov 0 siblings, 0 replies; 4+ messages in thread From: Dmitry Vyukov @ 2020-04-01 9:12 UTC (permalink / raw) To: Grant Grundler, syzkaller Cc: Greg KH, syzbot, David Miller, festevam, Hayes Wang, Johan Hedberg, kernel, Linux ARM, linux-bluetooth, dl-linux-imx, LKML, USB list, Marcel Holtmann, nishadkamdar, peter.chen, Prashant Malani, Sascha Hauer, Shawn Guo, syzkaller-bugs On Tue, Mar 31, 2020 at 7:44 PM Grant Grundler <grundler@chromium.org> wrote: > > On Tue, Mar 31, 2020 at 10:41 AM Greg KH <gregkh@linuxfoundation.org> wrote: > > > > On Tue, Mar 31, 2020 at 10:36:01AM -0700, syzbot wrote: > > > syzbot suspects this bug was fixed by commit: > > > > > > commit d9958306d4be14f4c7466242b38ed3893a7b1386 > > > Author: Nishad Kamdar <nishadkamdar@gmail.com> > > > Date: Sun Mar 15 10:55:07 2020 +0000 > > > > > > USB: chipidea: Use the correct style for SPDX License Identifier > > > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16d4940be00000 > > > start commit: 63623fd4 Merge tag 'for-linus' of git://git.kernel.org/pub.. > > > git tree: upstream > > > kernel config: https://syzkaller.appspot.com/x/.config?x=5d2e033af114153f > > > dashboard link: https://syzkaller.appspot.com/bug?extid=a66a7c2e996797bb4acb > > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c25a81e00000 > > > > > > If the result looks correct, please mark the bug fixed by replying with: > > > > > > #syz fix: USB: chipidea: Use the correct style for SPDX License Identifier > > > > I really doubt a comment change fixed a syzbot bug :) > > Just as I don't believe the bug was caused by pmalani's patch to r8152. > > syzbot is just having trouble automatically bisecting/tracking this > bug since it appears only intermittently. Checking if vmlinux changes after applying the patch looked like a smart and simple way to detect all of: - Comment-only change - Documentation-only change - Change to a non-current arch - Changed to non-enabled configs - Changes to tests only But it's not working in reality, there is some bug in kernel or compiler: https://github.com/google/syzkaller/issues/1271#issuecomment-559093018 You may see in this bisection log as well: culprit signature: 85ed07d5a8769c26fa0d170475624841e367ea0d08ea79f55ca450a9e97429a0 parent signature: 2244116b3fcae3bb24003990bcd2b06a03861effee2d94675e527446c3da078f So this commit somehow does very realistically affect the kernel binary. So far nobody figured out why... Before you ask, syzkaller filters out debug info, etc: https://github.com/google/syzkaller/blob/master/pkg/build/linux.go#L168-L178 ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-04-01 9:13 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <000000000000da6059059fcfdcf9@google.com>
2020-03-31 17:36 ` KASAN: use-after-free Read in skb_release_data (2) syzbot
2020-03-31 17:41 ` Greg KH
2020-03-31 17:44 ` Grant Grundler
2020-04-01 9:12 ` Dmitry Vyukov
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).