Oops: general protection fault, probably for non-canonical address 0xdffffc0000000035: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x00000000000001a8-0x00000000000001af] CPU: 2 UID: 0 PID: 18579 Comm: syz.2.3451 Not tainted 6.16.0-rc4-syzkaller-00286-gc435a4f487e8 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:htb_deactivate net/sched/sch_htb.c:613 [inline] RIP: 0010:htb_qlen_notify+0x2d/0xc0 net/sched/sch_htb.c:1489 Code: fa 41 55 41 54 55 48 89 fd 53 48 89 f3 4c 8d ab a8 01 00 00 e8 64 29 2e f8 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 67 44 8b a3 a8 01 00 00 31 ff 44 RSP: 0018:ffffc900059372d8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900070b1000 RDX: 0000000000000035 RSI: ffffffff898df73c RDI: ffff8880401c4000 RBP: ffff8880401c4000 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000000afff2 R11: 0000000000000001 R12: ffffffff8ce88dc0 R13: 00000000000001a8 R14: ffffffff8ce88da0 R15: ffff8880401c4000 FS: 00007f3fb69d56c0(0000) GS:ffff8880d6915000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3fb69d4f98 CR3: 000000010e827000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 3a810b1eb6134bdc DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: qdisc_tree_reduce_backlog+0x221/0x500 net/sched/sch_api.c:811 fq_codel_change+0xb1a/0x11b0 net/sched/sch_fq_codel.c:450 fq_codel_init+0x4ce/0xa60 net/sched/sch_fq_codel.c:487 qdisc_create+0x454/0xfc0 net/sched/sch_api.c:1324 __tc_modify_qdisc net/sched/sch_api.c:1749 [inline] tc_modify_qdisc+0x12bb/0x2130 net/sched/sch_api.c:1813 rtnetlink_rcv_msg+0x3c6/0xe90 net/core/rtnetlink.c:6953 netlink_rcv_skb+0x155/0x420 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg net/socket.c:727 [inline] ____sys_sendmsg+0xa98/0xc70 net/socket.c:2566 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620 __sys_sendmsg+0x16d/0x220 net/socket.c:2652 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3fb5b8e929 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3fb69d5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f3fb5db5fa0 RCX: 00007f3fb5b8e929 RDX: 0000000000000800 RSI: 0000200000000100 RDI: 0000000000000004 RBP: 00007f3fb5c10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f3fb5db5fa0 R15: 00007ffe24e8a708 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:htb_deactivate net/sched/sch_htb.c:613 [inline] RIP: 0010:htb_qlen_notify+0x2d/0xc0 net/sched/sch_htb.c:1489 Code: fa 41 55 41 54 55 48 89 fd 53 48 89 f3 4c 8d ab a8 01 00 00 e8 64 29 2e f8 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 67 44 8b a3 a8 01 00 00 31 ff 44 RSP: 0018:ffffc900059372d8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900070b1000 RDX: 0000000000000035 RSI: ffffffff898df73c RDI: ffff8880401c4000 RBP: ffff8880401c4000 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000000afff2 R11: 0000000000000001 R12: ffffffff8ce88dc0 R13: 00000000000001a8 R14: ffffffff8ce88da0 R15: ffff8880401c4000 FS: 00007f3fb69d56c0(0000) GS:ffff8880d6915000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3fb69d4f98 CR3: 000000010e827000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 3a810b1eb6134bdc DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: fa cli 1: 41 55 push %r13 3: 41 54 push %r12 5: 55 push %rbp 6: 48 89 fd mov %rdi,%rbp 9: 53 push %rbx a: 48 89 f3 mov %rsi,%rbx d: 4c 8d ab a8 01 00 00 lea 0x1a8(%rbx),%r13 14: e8 64 29 2e f8 call 0xf82e297d 19: 4c 89 ea mov %r13,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 04 je 0x36 32: 3c 03 cmp $0x3,%al 34: 7e 67 jle 0x9d 36: 44 8b a3 a8 01 00 00 mov 0x1a8(%rbx),%r12d 3d: 31 ff xor %edi,%edi 3f: 44 rex.R