Hello, syzbot found the following issue on:
HEAD commit: 38b5133a octeontx2-pf: Fix otx2_get_fecparam() git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=166288a8d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=dbc1ca9e55dc1f9f dashboard link: https://syzkaller.appspot.com/bug?extid=b53a709f04722ca12a3c syz repro: https://syzkaller.appspot.com/x/repro.syz?x=119454ccd00000 The issue was bisected to: commit d03b195b5aa015f6c11988b86a3625f8d5dbac52 Author: Maxim Mikityanskiy <maxi...@mellanox.com> Date: Tue Jan 19 12:08:13 2021 +0000 sch_htb: Hierarchical QoS hardware offload bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13ab12ecd00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=106b12ecd00000 console output: https://syzkaller.appspot.com/x/log.txt?x=17ab12ecd00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b53a709f04722ca12...@syzkaller.appspotmail.com Fixes: d03b195b5aa0 ("sch_htb: Hierarchical QoS hardware offload") BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 183fe067 P4D 183fe067 PUD 21aef067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 10125 Comm: syz-executor.0 Not tainted 5.11.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc9000a9c74e8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 1ffff92001538e9e RCX: 0000000000000000 RDX: ffffc9000a9c7520 RSI: 0000000000000012 RDI: ffff88802d158000 RBP: ffff88802d158000 R08: 00000000fffffff1 R09: 0000000000000400 R10: ffffffff871631c4 R11: 0000000000000000 R12: ffffffff89ea6b40 R13: dffffc0000000000 R14: ffff888012b79c00 R15: 00000000ffff0000 FS: 00007f73f9698700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000173b5000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: htb_offload net/sched/sch_htb.c:1011 [inline] htb_select_queue+0x17f/0x2c0 net/sched/sch_htb.c:1349 tc_modify_qdisc+0x44a/0x1a50 net/sched/sch_api.c:1657 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5553 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2348 ___sys_sendmsg+0xf3/0x170 net/socket.c:2402 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2435 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466019 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f73f9698188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466019 RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 00000000004bd067 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fffefccc11f R14: 00007f73f9698300 R15: 0000000000022000 Modules linked in: CR2: 0000000000000000 ---[ end trace e1544e8206616773 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc9000a9c74e8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 1ffff92001538e9e RCX: 0000000000000000 RDX: ffffc9000a9c7520 RSI: 0000000000000012 RDI: ffff88802d158000 RBP: ffff88802d158000 R08: 00000000fffffff1 R09: 0000000000000400 R10: ffffffff871631c4 R11: 0000000000000000 R12: ffffffff89ea6b40 R13: dffffc0000000000 R14: ffff888012b79c00 R15: 00000000ffff0000 FS: 00007f73f9698700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000173b5000 CR4: 00000000001506e0 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 syzkal...@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
