syzbot

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2648 jiffies s: 5669 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5725 Comm: syz.3.432 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x80 kernel/kcov.c:314
Code: 28 4d 39 ca 77 22 89 ff 89 f6 49 ff c0 4c 89 01 48 c7 44 11 08 03 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 90 <48> 8b 04 24 65 48 8b 15 64 19 80 7e 65 8b 0d 65 19 80 7e 81 e1 00
RSP: 0018:ffffc900001e0038 EFLAGS: 00000046
RAX: 00000000ffffffe4 RBX: 1ffff9200003c00c RCX: dac82875d64fa800
RDX: 0000000000000004 RSI: 00000000ffffffe4 RDI: 0000000000000000
RBP: ffffc900001e0148 R08: ffffffff8e1f482f R09: 1ffffffff1c3e905
R10: dffffc0000000000 R11: fffffbfff1c3e906 R12: ffffc900001e0240
R13: ffff88805298b000 R14: 00000000ffffffe4 R15: ffffc900001e0080
FS:  00007fb89f2b76c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002c442000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __perf_event_output kernel/events/core.c:7733 [inline]
 perf_event_output_forward+0x1bf/0x2f0 kernel/events/core.c:7750
 __perf_event_overflow+0x448/0x610 kernel/events/core.c:9496
 perf_tp_event+0x38c/0xc00 kernel/events/core.c:10029
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10002
 perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 92 50 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900001e0660 EFLAGS: 00000206
RAX: dac82875d64fa800 RBX: 1ffff9200003c0d4 RCX: dac82875d64fa800
RDX: dffffc0000000000 RSI: ffffffff8a8c0620 RDI: ffffffff8adf0020
RBP: ffffc900001e0748 R08: ffffffff90ad82ff R09: 1ffffffff215b05f
R10: dffffc0000000000 R11: fffffbfff215b060 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3b900 R15: 0000000000000002
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 __ip_queue_xmit+0x1174/0x1c10 net/ipv4/ip_output.c:539
 __tcp_transmit_skb+0x1c92/0x31a0 net/ipv4/tcp_output.c:1405
 tcp_transmit_skb net/ipv4/tcp_output.c:1423 [inline]
 __tcp_retransmit_skb+0x92c/0x1310 net/ipv4/tcp_output.c:3315
 tcp_retransmit_skb+0x2e/0x350 net/ipv4/tcp_output.c:3338
 tcp_retransmit_timer+0x1521/0x2790 net/ipv4/tcp_timer.c:574
 tcp_write_timer+0x126/0x280 net/ipv4/tcp_timer.c:676
 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x53e/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:try_charge_memcg+0x45f/0x1800 mm/memcontrol.c:2645
Code: 00 43 0f b6 04 2f 84 c0 0f 85 3b 0c 00 00 45 89 26 41 b4 01 e9 da fe ff ff e8 6d 14 50 08 f7 c3 00 02 00 00 74 d1 fb 45 84 e4 <0f> 85 7a 10 00 00 e9 16 0d 00 00 44 89 f3 48 8b bc 24 b8 00 00 00
RSP: 0018:ffffc9000cc578e0 EFLAGS: 00000202
RAX: 1ffff9200198af38 RBX: 0000000000000283 RCX: dac82875d64fa800
RDX: dffffc0000000000 RSI: ffffffff8a8c0620 RDI: ffffffff8adf0020
RBP: ffffc9000cc57b10 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000040 R15: 1ffffffff196a95c
 obj_cgroup_charge_pages mm/memcontrol.c:3099 [inline]
 obj_cgroup_charge+0x36a/0x620 mm/memcontrol.c:3390
 memcg_slab_pre_alloc_hook mm/slab.h:501 [inline]
 slab_pre_alloc_hook+0x2e7/0x310 mm/slab.h:715
 slab_alloc_node mm/slub.c:3279 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x56/0x2f0 mm/slub.c:3383
 sk_prot_alloc+0x57/0x210 net/core/sock.c:2046
 sk_alloc+0x36/0x340 net/core/sock.c:2108
 unix_create1+0xb3/0x710 net/unix/af_unix.c:-1
 unix_create+0x143/0x1f0 net/unix/af_unix.c:1017
 __sock_create+0x4a2/0x940 net/socket.c:1549
 sock_create net/socket.c:1605 [inline]
 __sys_socketpair+0x232/0x540 net/socket.c:1736
 __do_sys_socketpair net/socket.c:1785 [inline]
 __se_sys_socketpair net/socket.c:1782 [inline]
 __x64_sys_socketpair+0x97/0xb0 net/socket.c:1782
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb89e39acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb89f2b7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007fb89e615fa0 RCX: 00007fb89e39acb9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007fb89e408bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb89e616038 R14: 00007fb89e615fa0 R15: 00007ffcc3e3d2b8
 </TASK>