On Tue, Jan 03, 2023 at 08:21:25PM -0800, Cong Wang wrote: > On Tue, Jan 03, 2023 at 04:08:51PM -0800, syzbot wrote: > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: c76083fac3ba Add linux-next specific files for 20221226 > > git tree: linux-next > > console+strace: https://syzkaller.appspot.com/x/log.txt?x=1723da42480000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=c217c755f1884ab6 > > dashboard link: https://syzkaller.appspot.com/bug?extid=30b72abaa17c07fe39dd > > 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=14fc414c480000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1604b20a480000 > > > > Downloadable assets: > > disk image: https://storage.googleapis.com/syzbot-assets/e388f26357fd/disk-c76083fa.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/e24f0bae36d5/vmlinux-c76083fa.xz > > kernel image: https://storage.googleapis.com/syzbot-assets/a5a69a059716/bzImage-c76083fa.xz > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+30b72abaa17c07fe39dd@xxxxxxxxxxxxxxxxxxxxxxxxx > > +bobby.eshleman@xxxxxxxxx > > Bobby, please take a look. > > Thanks. Roger that, I'll take a gander asap. > > > > > skbuff: skb_over_panic: text:ffffffff8768d6f1 len:25109 put:25109 head:ffff88802b5ac000 data:ffff88802b5ac02c tail:0x6241 end:0xc0 dev:<NULL> > > ------------[ cut here ]------------ > > kernel BUG at net/core/skbuff.c:121! > > invalid opcode: 0000 [#1] PREEMPT SMP KASAN > > CPU: 0 PID: 5072 Comm: vhost-5071 Not tainted 6.2.0-rc1-next-20221226-syzkaller #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 > > RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:121 > > Code: f7 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 40 04 5b 8b ff 74 24 10 ff 74 24 20 e8 09 8e bf ff <0f> 0b e8 1a 67 82 f7 4c 8b 64 24 18 e8 80 3d d0 f7 48 c7 c1 40 12 > > RSP: 0018:ffffc90003cefca0 EFLAGS: 00010282 > > RAX: 000000000000008d RBX: ffff88802b674500 RCX: 0000000000000000 > > RDX: ffff8880236bba80 RSI: ffffffff81663b9c RDI: fffff5200079df86 > > RBP: ffffffff8b5b1280 R08: 000000000000008d R09: 0000000000000000 > > R10: 0000000080000000 R11: 0000000000000000 R12: ffffffff8768d6f1 > > R13: 0000000000006215 R14: ffffffff8b5b0400 R15: 00000000000000c0 > > FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 0000000020000380 CR3: 000000002985f000 CR4: 00000000003506f0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > Call Trace: > > <TASK> > > skb_over_panic net/core/skbuff.c:126 [inline] > > skb_put.cold+0x24/0x24 net/core/skbuff.c:2218 > > virtio_vsock_skb_rx_put include/linux/virtio_vsock.h:56 [inline] > > vhost_vsock_alloc_skb drivers/vhost/vsock.c:374 [inline] > > vhost_vsock_handle_tx_kick+0xad1/0xd00 drivers/vhost/vsock.c:509 > > vhost_worker+0x241/0x3e0 drivers/vhost/vhost.c:364 > > kthread+0x2e8/0x3a0 kernel/kthread.c:376 > > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 > > </TASK> > > Modules linked in: > > ---[ end trace 0000000000000000 ]--- > > RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:121 > > Code: f7 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 40 04 5b 8b ff 74 24 10 ff 74 24 20 e8 09 8e bf ff <0f> 0b e8 1a 67 82 f7 4c 8b 64 24 18 e8 80 3d d0 f7 48 c7 c1 40 12 > > RSP: 0018:ffffc90003cefca0 EFLAGS: 00010282 > > RAX: 000000000000008d RBX: ffff88802b674500 RCX: 0000000000000000 > > RDX: ffff8880236bba80 RSI: ffffffff81663b9c RDI: fffff5200079df86 > > RBP: ffffffff8b5b1280 R08: 000000000000008d R09: 0000000000000000 > > R10: 0000000080000000 R11: 0000000000000000 R12: ffffffff8768d6f1 > > R13: 0000000000006215 R14: ffffffff8b5b0400 R15: 00000000000000c0 > > FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 00007fdc6f4a4298 CR3: 000000002985f000 CR4: 00000000003506e0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > > > > --- > > This report is generated by a bot. It may contain errors. > > See https://goo.gl/tpsmEJ for more information about syzbot. > > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > > > syzbot will keep track of this issue. See: > > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > syzbot can test patches for this issue, for details see: > > https://goo.gl/tpsmEJ#testing-patches
