general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 1 PID: 18723 Comm: syz-executor.1 Not tainted 6.2.0-rc7-syzkaller-01590-g75da437a2f17 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 RIP: 0010:__seqprop_raw_spinlock_sequence include/linux/seqlock.h:274 [inline] RIP: 0010:hrtimer_active+0x6f/0x1f0 kernel/time/hrtimer.c:1611 Code: 01 f0 48 89 44 24 10 e8 cf 8c 10 00 48 8b 44 24 08 80 38 00 0f 85 71 01 00 00 49 8b 6d 30 48 8d 45 10 48 89 04 24 48 c1 e8 03 <42> 0f b6 04 30 84 c0 74 08 3c 03 0f 8e 42 01 00 00 8b 5d 10 31 ff RSP: 0018:ffffc9000aed72a8 EFLAGS: 00010202 RAX: 0000000000000002 RBX: ffff888045b5fb30 RCX: ffffc9000c0f5000 RDX: 0000000000040000 RSI: ffffffff817073c1 RDI: ffff888045b5fb30 RBP: 0000000000000000 R08: 0000000000000007 R09: fffffffffffff000 R10: ffffffffffffffea R11: 0000000000000000 R12: 0000000000000000 R13: ffff888045b5fb30 R14: dffffc0000000000 R15: 0000000081100000 FS: 00007f057395f700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020190000 CR3: 0000000075f7b000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hrtimer_try_to_cancel+0x25/0x1e0 kernel/time/hrtimer.c:1328 hrtimer_cancel+0x17/0x40 kernel/time/hrtimer.c:1443 tbf_destroy+0x7c/0x2b0 net/sched/sch_tbf.c:497 qdisc_create+0xaca/0x1150 net/sched/sch_api.c:1329 tc_modify_qdisc+0x488/0x19c0 net/sched/sch_api.c:1679 rtnetlink_rcv_msg+0x43e/0xca0 net/core/rtnetlink.c:6174 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2574 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:722 [inline] sock_sendmsg+0xde/0x190 net/socket.c:745 ____sys_sendmsg+0x71c/0x900 net/socket.c:2501 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2555 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2584 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f0572c8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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:00007f057395f168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f0572dabf80 RCX: 00007f0572c8c0f9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00007f0572ce7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff054a2d7f R14: 00007f057395f300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__seqprop_raw_spinlock_sequence include/linux/seqlock.h:274 [inline] RIP: 0010:hrtimer_active+0x6f/0x1f0 kernel/time/hrtimer.c:1611 Code: 01 f0 48 89 44 24 10 e8 cf 8c 10 00 48 8b 44 24 08 80 38 00 0f 85 71 01 00 00 49 8b 6d 30 48 8d 45 10 48 89 04 24 48 c1 e8 03 <42> 0f b6 04 30 84 c0 74 08 3c 03 0f 8e 42 01 00 00 8b 5d 10 31 ff RSP: 0018:ffffc9000aed72a8 EFLAGS: 00010202 RAX: 0000000000000002 RBX: ffff888045b5fb30 RCX: ffffc9000c0f5000 RDX: 0000000000040000 RSI: ffffffff817073c1 RDI: ffff888045b5fb30 RBP: 0000000000000000 R08: 0000000000000007 R09: fffffffffffff000 R10: ffffffffffffffea R11: 0000000000000000 R12: 0000000000000000 R13: ffff888045b5fb30 R14: dffffc0000000000 R15: 0000000081100000 FS: 00007f057395f700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ecc784998 CR3: 0000000075f7b000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 01 f0 add %esi,%eax 2: 48 89 44 24 10 mov %rax,0x10(%rsp) 7: e8 cf 8c 10 00 callq 0x108cdb c: 48 8b 44 24 08 mov 0x8(%rsp),%rax 11: 80 38 00 cmpb $0x0,(%rax) 14: 0f 85 71 01 00 00 jne 0x18b 1a: 49 8b 6d 30 mov 0x30(%r13),%rbp 1e: 48 8d 45 10 lea 0x10(%rbp),%rax 22: 48 89 04 24 mov %rax,(%rsp) 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 74 08 je 0x3b 33: 3c 03 cmp $0x3,%al 35: 0f 8e 42 01 00 00 jle 0x17d 3b: 8b 5d 10 mov 0x10(%rbp),%ebx 3e: 31 ff xor %edi,%edi