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Date: Wed, 26 Jun 2024 23:36:45 +0800 From: Heng Qi <hengqi@...ux.alibaba.com> To: Eric Dumazet <edumazet@...gle.com> Cc: davem@...emloft.net, kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com, syzbot <syzbot+e77327e34cdc8c36b7d3@...kaller.appspotmail.com> Subject: Re: [syzbot] [net?] general protection fault in coalesce_fill_reply On Wed, 26 Jun 2024 14:44:20 +0200, Eric Dumazet <edumazet@...gle.com> wrote: > On Wed, Jun 26, 2024 at 2:43 PM syzbot > <syzbot+e77327e34cdc8c36b7d3@...kaller.appspotmail.com> wrote: > > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 50b70845fc5c Merge branch 'add-ethernet-driver-for-tehuti-.. > > git tree: net-next > > console+strace: https://syzkaller.appspot.com/x/log.txt?x=1780b3b6980000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=e78fc116033e0ab7 > > dashboard link: https://syzkaller.appspot.com/bug?extid=e77327e34cdc8c36b7d3 > > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1599901a980000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1429e301980000 > > > > Downloadable assets: > > disk image: https://storage.googleapis.com/syzbot-assets/2c4a7dba390c/disk-50b70845.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/62ea7d7c8bc6/vmlinux-50b70845.xz > > kernel image: https://storage.googleapis.com/syzbot-assets/573c2ae03545/bzImage-50b70845.xz > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+e77327e34cdc8c36b7d3@...kaller.appspotmail.com > > > > Oops: general protection fault, probably for non-canonical address 0xdffffc0000000193: 0000 [#1] PREEMPT SMP KASAN PTI > > KASAN: null-ptr-deref in range [0x0000000000000c98-0x0000000000000c9f] > > CPU: 1 PID: 5093 Comm: syz-executor403 Not tainted 6.10.0-rc4-syzkaller-00936-g50b70845fc5c #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 > > RIP: 0010:coalesce_fill_reply+0xcc/0x1b70 net/ethtool/coalesce.c:214 > > Code: e8 19 2c f9 f7 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 e3 f1 5e f8 bb 98 0c 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 c5 f1 5e f8 48 8b 03 48 89 44 24 > > RSP: 0018:ffffc90003526ee0 EFLAGS: 00010206 > > RAX: 0000000000000193 RBX: 0000000000000c98 RCX: ffff88802661da00 > > RDX: 0000000000000000 RSI: ffff88801b72e740 RDI: ffff88802dac6780 > > RBP: ffffc90003527118 R08: ffffffff899bb137 R09: 1ffff11003e8b805 > > R10: dffffc0000000000 R11: ffffffff899cf860 R12: ffffffff899cf860 > > R13: dffffc0000000000 R14: ffff88801b72e740 R15: ffff88802dac6780 > > FS: 000055557bf45380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 00000000200f9018 CR3: 0000000066db0000 CR4: 00000000003506f0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > Call Trace: > > <TASK> > > ethnl_default_dump_one net/ethtool/netlink.c:467 [inline] > > ethnl_default_dumpit+0x5ac/0xb30 net/ethtool/netlink.c:494 > > genl_dumpit+0x107/0x1a0 net/netlink/genetlink.c:1027 > > netlink_dump+0x647/0xd80 net/netlink/af_netlink.c:2325 > > __netlink_dump_start+0x59f/0x780 net/netlink/af_netlink.c:2440 > > genl_family_rcv_msg_dumpit net/netlink/genetlink.c:1076 [inline] > > genl_family_rcv_msg net/netlink/genetlink.c:1192 [inline] > > genl_rcv_msg+0x88c/0xec0 net/netlink/genetlink.c:1210 > > netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 > > genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 > > netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] > > netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357 > > netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 > > sock_sendmsg_nosec net/socket.c:730 [inline] > > __sock_sendmsg+0x221/0x270 net/socket.c:745 > > ____sys_sendmsg+0x525/0x7d0 net/socket.c:2585 > > ___sys_sendmsg net/socket.c:2639 [inline] > > __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2668 > > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > RIP: 0033:0x7f99a46ff219 > > Code: 48 83 c4 28 c3 e8 e7 18 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 > > RSP: 002b:00007fff97ad8a78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > > RAX: ffffffffffffffda RBX: 00007fff97ad8c48 RCX: 00007f99a46ff219 > > RDX: 0000000000000000 RSI: 0000000020000e80 RDI: 0000000000000003 > > RBP: 00007f99a4771610 R08: 0000000000000000 R09: 00007fff97ad8c48 > > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 > > R13: 00007fff97ad8c38 R14: 0000000000000001 R15: 0000000000000001 > > </TASK> > > Modules linked in: > > ---[ end trace 0000000000000000 ]--- > > RIP: 0010:coalesce_fill_reply+0xcc/0x1b70 net/ethtool/coalesce.c:214 > > Code: e8 19 2c f9 f7 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 e3 f1 5e f8 bb 98 0c 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 c5 f1 5e f8 48 8b 03 48 89 44 24 > > RSP: 0018:ffffc90003526ee0 EFLAGS: 00010206 > > RAX: 0000000000000193 RBX: 0000000000000c98 RCX: ffff88802661da00 > > RDX: 0000000000000000 RSI: ffff88801b72e740 RDI: ffff88802dac6780 > > RBP: ffffc90003527118 R08: ffffffff899bb137 R09: 1ffff11003e8b805 > > R10: dffffc0000000000 R11: ffffffff899cf860 R12: ffffffff899cf860 > > R13: dffffc0000000000 R14: ffff88801b72e740 R15: ffff88802dac6780 > > FS: 000055557bf45380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 000055a18cbf60a8 CR3: 0000000066db0000 CR4: 00000000003506f0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > ---------------- > > Code disassembly (best guess): > > 0: e8 19 2c f9 f7 call 0xf7f92c1e > > 5: 4c 89 f0 mov %r14,%rax > > 8: 48 c1 e8 03 shr $0x3,%rax > > c: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) > > 11: 74 08 je 0x1b > > 13: 4c 89 f7 mov %r14,%rdi > > 16: e8 e3 f1 5e f8 call 0xf85ef1fe > > 1b: bb 98 0c 00 00 mov $0xc98,%ebx > > 20: 49 03 1e add (%r14),%rbx > > 23: 48 89 d8 mov %rbx,%rax > > 26: 48 c1 e8 03 shr $0x3,%rax > > * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction > > 2f: 74 08 je 0x39 > > 31: 48 89 df mov %rbx,%rdi > > 34: e8 c5 f1 5e f8 call 0xf85ef1fe > > 39: 48 8b 03 mov (%rbx),%rax > > 3c: 48 rex.W > > 3d: 89 .byte 0x89 > > 3e: 44 rex.R > > 3f: 24 .byte 0x24 > > > > > > --- > > 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@...glegroups.com. > > > > syzbot will keep track of this issue. See: > > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > > > If the report is already addressed, let syzbot know by replying with: > > #syz fix: exact-commit-title > > > > If you want syzbot to run the reproducer, reply with: > > #syz test: git://repo/address.git branch-or-commit-hash > > If you attach or paste a git patch, syzbot will apply it before testing. > > > > If you want to overwrite report's subsystems, reply with: > > #syz set subsystems: new-subsystem > > (See the list of subsystem names on the web dashboard) > > > > If the report is a duplicate of another one, reply with: > > #syz dup: exact-subject-of-another-report > > > > If you want to undo deduplication, reply with: > > #syz undup > > Seems to be caused by > > commit f750dfe825b904164688adeb147950e0e0c4d262 > Author: Heng Qi <hengqi@...ux.alibaba.com> > Date: Fri Jun 21 18:13:51 2024 +0800 > > ethtool: provide customized dim profile management Hi, Eric Thanks for your quick check! The fix has been submitted to: https://lore.kernel.org/all/20240626153421.102107-1-hengqi@linux.alibaba.com/ Thanks a lot!
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