Messages in this thread | | | Date | Wed, 19 Oct 2022 15:30:18 -0700 | From | Jakub Kicinski <> | Subject | Re: [syzbot] general protection fault in pse_prepare_data |
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On Wed, 19 Oct 2022 04:26:35 -0700 syzbot wrote: > HEAD commit: 55be6084c8e0 Merge tag 'timers-core-2022-10-05' of git://g.. > git tree: upstream > console+strace: https://syzkaller.appspot.com/x/log.txt?x=140d5a2c880000 > kernel config: https://syzkaller.appspot.com/x/.config?x=df75278aabf0681a > dashboard link: https://syzkaller.appspot.com/bug?extid=81c4b4bbba6eea2cfcae > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13470244880000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=146e88b4880000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/9d967e5d91fa/disk-55be6084.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/9a8cffcbc089/vmlinux-55be6084.xz > > Bisection is inconclusive: the first bad commit could be any of: > > 331834898f2b Merge branch 'add-generic-pse-support' > 66741b4e94ca net: pse-pd: add regulator based PSE driver > 2a4187f4406e once: rename _SLOW to _SLEEPABLE > f05dfdaf567a dt-bindings: net: pse-dt: add bindings for regulator based PoDL PSE controller > 18ff0bcda6d1 ethtool: add interface to interact with Ethernet Power Equipment > e52f7c1ddf3e Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net > 681bf011b9b5 eth: pse: add missing static inlines > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11fc42b4880000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+81c4b4bbba6eea2cfcae@syzkaller.appspotmail.com > > general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN > KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] > CPU: 1 PID: 3609 Comm: syz-executor227 Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 > RIP: 0010:pse_prepare_data+0x66/0x1e0 net/ethtool/pse-pd.c:67
Yeah, looking at ethtool internals - info can be NULL :(
For reasons I haven't quite grasped yet myself we use a different structure for info on do and dump which makes getting to extack in generic code inconvenient.
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