RSP: 002b:00007f2bdebbb038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2bddfe5fa0 RCX: 00007f2bddd8f749
RDX: 0000000004004880 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007f2bdebbb090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f2bddfe6038 R14: 00007f2bddfe5fa0 R15: 00007ffe31bf0068
</TASK>
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 1 UID: 0 PID: 7051 Comm: syz.0.303 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:1703 [inline]
RIP: 0010:hrtimer_try_to_cancel+0x7d/0x420 kernel/time/hrtimer.c:1352
Code: ae 12 00 48 8b 5c 24 08 48 8b 44 24 10 42 80 3c 30 00 74 08 48 89 df e8 41 d1 78 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:ffffc900030e7218 EFLAGS: 00010202
RAX: 1ffff1100544d860 RBX: 0000000000000010 RCX: 1ffff1100544d861
RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: ffff88802a26c2d0
RBP: ffffc900030e7410 R08: 0000000000000dc0 R09: 00000000ffffffff
R10: dffffc0000000000 R11: ffffffff896d4740 R12: 0000000000000002
R13: 00000000fffffff4 R14: dffffc0000000000 R15: 0000000000000000
FS: 00007f2bdebbb6c0(0000) GS:ffff888125f1c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558dce9808 CR3: 000000007dabe000 CR4: 00000000003526f0
Call Trace:
<TASK>
hrtimer_cancel+0x16/0x50 kernel/time/hrtimer.c:1481
cake_destroy+0x28/0x100 net/sched/sch_cake.c:2798
qdisc_create+0xaa3/0xea0 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 net/socket.c:727 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:742
____sys_sendmsg+0x505/0x820 net/socket.c:2592
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2646
__sys_sendmsg net/socket.c:2678 [inline]
__do_sys_sendmsg net/socket.c:2683 [inline]
__se_sys_sendmsg net/socket.c:2681 [inline]
__x64_sys_sendmsg+0x19b/0x260 net/socket.c:2681
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: 0033:0x7f2bddd8f749
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:00007f2bdebbb038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2bddfe5fa0 RCX: 00007f2bddd8f749
RDX: 0000000004004880 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007f2bdebbb090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f2bddfe6038 R14: 00007f2bddfe5fa0 R15: 00007ffe31bf0068
</TASK>
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:1703 [inline]
RIP: 0010:hrtimer_try_to_cancel+0x7d/0x420 kernel/time/hrtimer.c:1352
Code: ae 12 00 48 8b 5c 24 08 48 8b 44 24 10 42 80 3c 30 00 74 08 48 89 df e8 41 d1 78 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:ffffc900030e7218 EFLAGS: 00010202
RAX: 1ffff1100544d860 RBX: 0000000000000010 RCX: 1ffff1100544d861
RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: ffff88802a26c2d0
RBP: ffffc900030e7410 R08: 0000000000000dc0 R09: 00000000ffffffff
R10: dffffc0000000000 R11: ffffffff896d4740 R12: 0000000000000002
R13: 00000000fffffff4 R14: dffffc0000000000 R15: 0000000000000000
FS: 00007f2bdebbb6c0(0000) GS:ffff888125e1c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbaf95f5f98 CR3: 000000007dabe000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: ae scas %es:(%rdi),%al
1: 12 00 adc (%rax),%al
3: 48 8b 5c 24 08 mov 0x8(%rsp),%rbx
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 41 d1 78 00 call 0x78d15d
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