rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-....: (5 ticks this GP) idle=3c6c/1/0x4000000000000002 softirq=67965/67975 fqs=2100
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P18317 P18318/1:b..l
(detected by 0, t=10506 jiffies, g=98877, q=215 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18317 Comm: syz.2.3616 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:lock_release+0x131/0x920 kernel/locking/lockdep.c:5675
Code: 97 04 00 00 65 4c 8b 35 ad ac 9d 7e 49 8d 9e dc 0a 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 5b 05 00 00 83 3b 00 <0f> 85 6b 04 00 00 4c 89 74 24 08 43 c6 44 2f 08 00 48 c7 84 24 a0
RSP: 0018:ffffc900034e77c0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88805395289c RCX: 1c1260b251fd8b00
RDX: 0000000000000000 RSI: ffffffff8adf0dc0 RDI: ffffffff8adf0d80
RBP: ffffc900034e78d0 R08: ffffffff8e1fcd2f R09: 1ffffffff1c3f9a5
R10: dffffc0000000000 R11: fffffbfff1c3f9a6 R12: 1ffff9200069cf04
R13: dffffc0000000000 R14: ffff888053951dc0 R15: 1ffff9200069cf04
FS: 000055556a6ed500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1ffbde9d40 CR3: 000000004597b000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
rcu_lock_release include/linux/rcupdate.h:355 [inline]
rcu_read_unlock include/linux/rcupdate.h:824 [inline]
trace_call_bpf+0x5ca/0x6b0 kernel/trace/bpf_trace.c:137
perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:9997
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 31 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:ffffc900034e7c00 EFLAGS: 00000206
RAX: 1c1260b251fd8b00 RBX: 1ffff9200069cf88 RCX: 1c1260b251fd8b00
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0de0
RBP: ffffc900034e7cf8 R08: ffffffff90af524f R09: 1ffffffff215ea49
R10: dffffc0000000000 R11: fffffbfff215ea4a R12: 0000000000000246
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8cb32c58
__rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
rcu_read_unlock+0x85/0xa0 include/linux/rcupdate.h:823
dput+0xe2/0x1d0 fs/dcache.c:911
__fput+0x5e0/0x920 fs/file_table.c:328
task_work_run+0x1d0/0x260 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1ffbd9c629
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:00007ffe22b69968 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f1ffc017da0 RCX: 00007f1ffbd9c629
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f1ffc017da0 R08: 0000000000000006 R09: 0000000000000000
R10: 000000000003fc3c R11: 0000000000000246 R12: 00000000000c659b
R13: 00007f1ffc01618c R14: 00000000000c64c3 R15: 00007f1ffc016180
task:syz.6.3615 state:R running task stack:25648 pid:18318 ppid:13199 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__cant_migrate+0x0/0x2f0 kernel/sched/core.c:10004
Code: 08 89 f9 80 e1 07 80 c1 03 38 c1 7c b5 41 89 f6 41 89 d5 e8 72 ca 78 00 44 89 ea 44 89 f6 eb a2 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 00
RSP: 0018:ffffc90003737ab8 EFLAGS: 00000246
RAX: ffffc90003737ba0 RBX: ffffc90003737d04 RCX: 0000000000080000
RDX: ffffc9000d989000 RSI: 000000000000024e RDI: ffffffff8b8ef920
RBP: ffffc90003737c50 R08: ffff88807d489dc7 R09: 1ffff1100fa913b8
R10: dffffc0000000000 R11: ffffed100fa913b9 R12: ffffc90003737d00
R13: ffffc90003449030 R14: dffffc0000000000 R15: 0000000000000000
__bpf_prog_run include/linux/filter.h:590 [inline]
bpf_prog_run include/linux/filter.h:614 [inline]
bpf_test_run+0x28a/0x830 net/bpf/test_run.c:402
bpf_prog_test_run_skb+0xaa6/0x12a0 net/bpf/test_run.c:1191
bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3695
__sys_bpf+0x62b/0x780 kernel/bpf/syscall.c:5048
__do_sys_bpf kernel/bpf/syscall.c:5134 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5132 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5132
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: 0033:0x7fbbcf19c629
RSP: 002b:00007fbbcff86028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fbbcf415fa0 RCX: 00007fbbcf19c629
RDX: 0000000000000050 RSI: 0000200000000240 RDI: 000000000000000a
RBP: 00007fbbcf232b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbbcf416038 R14: 00007fbbcf415fa0 R15: 00007fff81ee3288
task:syz.2.3616 state:R running task stack:25424 pid:18317 ppid:16314 flags:0x00004008
Call Trace: