RBP: 00007f19a7b56090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f19a6fe6038 R14: 00007f19a6fe5fa0 R15: 00007ffd82fad208 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 0 UID: 0 PID: 6976 Comm: syz.3.253 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__seqprop_raw_spinlock_sequence include/linux/seqlock.h:226 [inline] RIP: 0010:hrtimer_active kernel/time/hrtimer.c:1711 [inline] RIP: 0010:hrtimer_try_to_cancel+0x7d/0x420 kernel/time/hrtimer.c:1360 Code: a9 12 00 48 8b 5c 24 08 48 8b 44 24 10 42 80 3c 30 00 74 08 48 89 df e8 d1 7e 79 00 4c 8b 3b 49 8d 5f 10 49 89 dc 49 c1 ec 03 <43> 0f b6 04 34 84 c0 0f 85 bf 00 00 00 8b 2b 89 ee 83 e6 01 31 ff RSP: 0018:ffffc9000c0df1f8 EFLAGS: 00010202 RAX: 1ffff1100f6e5860 RBX: 0000000000000010 RCX: 1ffff1100f6e5861 RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: ffff88807b72c2d0 RBP: ffffc9000c0df3f0 R08: 0000000000000dc0 R09: 00000000ffffffff R10: dffffc0000000000 R11: ffffffff897194e0 R12: 0000000000000002 R13: 00000000fffffff4 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007f19a7b566c0(0000) GS:ffff888125bf9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f360d8454f4 CR3: 000000002f24c000 CR4: 00000000003526f0 Call Trace: hrtimer_cancel+0x16/0x50 kernel/time/hrtimer.c:1489 cake_destroy+0x28/0x100 net/sched/sch_cake.c:2798 qdisc_create+0xaa3/0xeb0 net/sched/sch_api.c:1353 __tc_modify_qdisc net/sched/sch_api.c:1753 [inline] tc_modify_qdisc+0x1547/0x2020 net/sched/sch_api.c:1817 rtnetlink_rcv_msg+0x77c/0xb70 net/core/rtnetlink.c:6967 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec+0x18f/0x1d0 net/socket.c:737 __sock_sendmsg net/socket.c:752 [inline] ____sys_sendmsg+0x577/0x880 net/socket.c:2610 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2664 __sys_sendmsg net/socket.c:2696 [inline] __do_sys_sendmsg net/socket.c:2701 [inline] __se_sys_sendmsg net/socket.c:2699 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2699 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f19a6d8f749 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:00007f19a7b56038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f19a6fe5fa0 RCX: 00007f19a6d8f749 RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007f19a7b56090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f19a6fe6038 R14: 00007f19a6fe5fa0 R15: 00007ffd82fad208 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__seqprop_raw_spinlock_sequence include/linux/seqlock.h:226 [inline] RIP: 0010:hrtimer_active kernel/time/hrtimer.c:1711 [inline] RIP: 0010:hrtimer_try_to_cancel+0x7d/0x420 kernel/time/hrtimer.c:1360 Code: a9 12 00 48 8b 5c 24 08 48 8b 44 24 10 42 80 3c 30 00 74 08 48 89 df e8 d1 7e 79 00 4c 8b 3b 49 8d 5f 10 49 89 dc 49 c1 ec 03 <43> 0f b6 04 34 84 c0 0f 85 bf 00 00 00 8b 2b 89 ee 83 e6 01 31 ff RSP: 0018:ffffc9000c0df1f8 EFLAGS: 00010202 RAX: 1ffff1100f6e5860 RBX: 0000000000000010 RCX: 1ffff1100f6e5861 RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: ffff88807b72c2d0 RBP: ffffc9000c0df3f0 R08: 0000000000000dc0 R09: 00000000ffffffff R10: dffffc0000000000 R11: ffffffff897194e0 R12: 0000000000000002 R13: 00000000fffffff4 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007f19a7b566c0(0000) GS:ffff888125cf9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000404030 CR3: 000000002f24c000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: a9 12 00 48 8b test $0x8b480012,%eax 5: 5c pop %rsp 6: 24 08 and $0x8,%al 8: 48 8b 44 24 10 mov 0x10(%rsp),%rax d: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) 12: 74 08 je 0x1c 14: 48 89 df mov %rbx,%rdi 17: e8 d1 7e 79 00 call 0x797eed 1c: 4c 8b 3b mov (%rbx),%r15 1f: 49 8d 5f 10 lea 0x10(%r15),%rbx 23: 49 89 dc mov %rbx,%r12 26: 49 c1 ec 03 shr $0x3,%r12 * 2a: 43 0f b6 04 34 movzbl (%r12,%r14,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 bf 00 00 00 jne 0xf6 37: 8b 2b mov (%rbx),%ebp 39: 89 ee mov %ebp,%esi 3b: 83 e6 01 and $0x1,%esi 3e: 31 ff xor %edi,%edi