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: 6051 Comm: syz.1.2 Not tainted 6.16.0-rc4-syzkaller-00123-g4c06e63b9203 #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 04 54 31 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:ffffc9000214f310 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000c402000 RDX: 0000000000000035 RSI: ffffffff898a391c RDI: ffff88806c86a000 RBP: ffff88806c86a000 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000000affe0 R11: 0000000000000001 R12: ffffffff8ce86d80 R13: 00000000000001a8 R14: ffffffff8ce86d60 R15: ffff88806c86a000 FS: 0000000000000000(0000) GS:ffff888097722000(0063) knlGS:00000000f5056b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000030218ffc CR3: 000000006e0c3000 CR4: 0000000000352ef0 Call Trace: qdisc_tree_reduce_backlog+0x224/0x500 net/sched/sch_api.c:811 codel_change+0x6d9/0xc90 net/sched/sch_codel.c:153 codel_init+0x2e6/0x430 net/sched/sch_codel.c:172 qdisc_create+0x457/0xfc0 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+0x158/0x420 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x53a/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_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f37579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f505655c EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000080000280 RDX: 000000000000c010 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 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 04 54 31 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:ffffc9000214f310 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000c402000 RDX: 0000000000000035 RSI: ffffffff898a391c RDI: ffff88806c86a000 RBP: ffff88806c86a000 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000000affe0 R11: 0000000000000001 R12: ffffffff8ce86d80 R13: 00000000000001a8 R14: ffffffff8ce86d60 R15: ffff88806c86a000 FS: 0000000000000000(0000) GS:ffff888097722000(0063) knlGS:00000000f5056b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000030218ffc CR3: 000000006e0c3000 CR4: 0000000000352ef0 ---------------- 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 04 54 31 f8 call 0xf831541d 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