rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=6d8c/1/0x4000000000000000 softirq=16678/16679 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6595/1:b..l P6599/2:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=15177, q=340 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5194 Comm: klogd Not tainted 6.14.0-rc2-next-20250214-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:123 [inline]
RIP: 0010:lock_release+0x191/0xa30 kernel/locking/lockdep.c:5868
Code: 00 00 4c 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 01 68 8c 00 4c 89 6c 24 50 48 c7 84 24 b0 00 00 00 00 00 00 00 9c <8f> 84 24 b0 00 00 00 42 80 3c 3b 00 74 08 4c 89 f7 e8 e9 66 8c 00
RSP: 0018:ffffc90000007a38 EFLAGS: 00000046
RAX: ffffffff940d5f10 RBX: 1ffff92000000f5e RCX: ffffffff819d3420
RDX: 0000000000000000 RSI: ffffffff8c814d40 RDI: ffffffff8c814d00
RBP: ffffc90000007b70 R08: ffffffff903d9377 R09: 1ffffffff207b26e
R10: dffffc0000000000 R11: fffffbfff207b26f R12: 1ffff92000000f54
R13: ffffffff84fed005 R14: ffffc90000007af0 R15: dffffc0000000000
FS:  00007fec65f91380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400000003c80 CR3: 00000000347a8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
 _raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
 debug_object_deactivate+0x2d5/0x390 lib/debugobjects.c:888
 debug_hrtimer_deactivate kernel/time/hrtimer.c:460 [inline]
 debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:502
 __run_hrtimer kernel/time/hrtimer.c:1769 [inline]
 __hrtimer_run_queues+0x305/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5247
Code: c9 50 e8 e9 29 0c 00 48 83 c4 08 4c 89 f7 e8 fd 39 00 00 0f 1f 44 00 00 4c 89 f7 e8 e0 73 80 0a e8 4b 03 39 00 fb 48 8b 5d c0 <48> 8d bb 08 16 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc900032b78c8 EFLAGS: 00000282
RAX: 4fac7a62920d2e00 RBX: ffff8880440f9e00 RCX: ffffffff9a66d103
RDX: dffffc0000000000 RSI: ffffffff8c2a9e60 RDI: ffffffff8c814d60
RBP: ffffc900032b7910 R08: ffffffff903d9377 R09: 1ffffffff207b26e
R10: dffffc0000000000 R11: fffffbfff207b26f R12: 1ffff110170c7eee
R13: dffffc0000000000 R14: ffff8880b863e940 R15: ffff8880b863f770
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1916/0x4c90 kernel/sched/core.c:6760
 __schedule_loop kernel/sched/core.c:6837 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6852
 syslog_print+0x274/0x630 kernel/printk/printk.c:1633
 do_syslog+0x3c2/0x820 kernel/printk/printk.c:1785
 __do_sys_syslog kernel/printk/printk.c:1877 [inline]
 __se_sys_syslog kernel/printk/printk.c:1875 [inline]
 __x64_sys_syslog+0x7c/0x90 kernel/printk/printk.c:1875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fec660f2fa7
Code: 73 01 c3 48 8b 0d 81 ce 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 ce 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc720dce88 EFLAGS: 00000206 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 00007fec662914a0 RCX: 00007fec660f2fa7
RDX: 00000000000003ff RSI: 00007fec662914a0 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000007 R09: a230f83ef327fd20
R10: 0000000000004000 R11: 0000000000000206 R12: 00007fec662914a0
R13: 00007fec66281212 R14: 00007fec662914f0 R15: 00007fec662914f0
 </TASK>
task:syz.2.135       state:R  running task     stack:22752 pid:6599  tgid:6594  ppid:5843   task_flags:0x400040 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6760
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7082
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:68 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:587 [inline]
RIP: 0010:cpu_online include/linux/cpumask.h:1143 [inline]
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0xab/0xa30 kernel/locking/lockdep.c:5862
Code: 1f 44 00 00 65 8b 05 90 a2 66 7e 83 f8 08 0f 83 fe 05 00 00 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 70 93 3d 90 be 08 00 00 00 <e8> 50 6a 8c 00 48 0f a3 1d 48 5f a0 0e 73 16 e8 f1 48 0a 00 84 c0
RSP: 0018:ffffc9001b2e7140 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc9000fb61000 RSI: 0000000000000008 RDI: ffffffff903d9370
RBP: ffffc9001b2e7270 R08: ffffffff81fbd91c R09: 1ffffffff207b26e
R10: dffffc0000000000 R11: fffffbfff207b26f R12: 1ffff9200365ce34
R13: ffffffff81fbd611 R14: 0000000000000001 R15: dffffc0000000000
 rcu_lock_release include/linux/rcupdate.h:341 [inline]
 rcu_read_unlock include/linux/rcupdate.h:871 [inline]
 filemap_map_pages+0x5b5/0x1900 mm/filemap.c:3827
 do_fault_around mm/memory.c:5396 [inline]
 do_read_fault mm/memory.c:5429 [inline]
 do_fault mm/memory.c:5572 [inline]
 do_pte_missing mm/memory.c:4091 [inline]
 handle_pte_fault mm/memory.c:5935 [inline]
 __handle_mm_fault+0x4b01/0x7100 mm/memory.c:6078
 handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6247
 faultin_page mm/gup.c:1193 [inline]
 __get_user_pages+0x1a92/0x4140 mm/gup.c:1491
 populate_vma_page_range+0x264/0x330 mm/gup.c:1929
 __mm_populate+0x27a/0x460 mm/gup.c:2032
 mm_populate include/linux/mm.h:3355 [inline]
 vm_mmap_pgoff+0x303/0x430 mm/util.c:581
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78ba78cde9
RSP: 002b:00007f78b85d5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f78ba9a6160 RCX: 00007f78ba78cde9
RDX: b635773f06ebbeef RSI: 0000000000b36000 RDI: 0000400000000000
RBP: 00007f78ba80e2a0 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f78ba9a6160 R15: 00007ffdf023e548
 </TASK>
task:syz.2.135       state:R  running task     stack:23952 pid:6595  tgid:6594  ppid:5843   task_flags:0x400040 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6760
 preempt_schedule_notrace+0x100/0x140 kernel/sched/core.c:7032
 preempt_schedule_notrace_thunk+0x1a/0x30 arch/x86/entry/thunk.S:13
 rcu_is_watching+0x7e/0xb0 kernel/rcu/tree.c:737
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0xbf/0xa30 kernel/locking/lockdep.c:5862
 rcu_lock_release include/linux/rcupdate.h:341 [inline]
 rcu_read_unlock include/linux/rcupdate.h:871 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0x1a77/0x2380 arch/x86/kernel/unwind_orc.c:680
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2367 [inline]
 slab_free mm/slub.c:4623 [inline]
 kfree+0x196/0x430 mm/slub.c:4816
 genradix_free_recurse+0x61/0xb0 lib/generic-radix-tree.c:204
 genradix_free_recurse+0x61/0xb0 lib/generic-radix-tree.c:204
 sctp_stream_free+0xd4/0x110 net/sctp/stream.c:191
 sctp_association_free+0x247/0x7b0 net/sctp/associola.c:351
 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline]
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1330 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1198 [inline]
 sctp_do_sm+0x4393/0x60c0 net/sctp/sm_sideeffect.c:1169
 sctp_assoc_bh_rcv+0x3f1/0x640 net/sctp/associola.c:1052
 sctp_backlog_rcv+0x177/0x3f0 net/sctp/input.c:331
 sk_backlog_rcv include/net/sock.h:1123 [inline]
 __release_sock+0x243/0x350 net/core/sock.c:3107
 release_sock+0x61/0x1f0 net/core/sock.c:3661
 sctp_wait_for_connect+0x3ce/0x6e0 net/sctp/socket.c:9360
 sctp_sendmsg_to_asoc+0x1404/0x1800 net/sctp/socket.c:1885
 sctp_sendmsg+0x242e/0x35d0 net/sctp/socket.c:2031
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x1a6/0x270 net/socket.c:733
 __sys_sendto+0x363/0x4c0 net/socket.c:2187
 __do_sys_sendto net/socket.c:2194 [inline]
 __se_sys_sendto net/socket.c:2190 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2190
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78ba78cde9
RSP: 002b:00007f78bb4ff038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f78ba9a5fa0 RCX: 00007f78ba78cde9
RDX: 0000000000000001 RSI: 00004000000004c0 RDI: 0000000000000003
RBP: 00007f78ba80e2a0 R08: 0000400000000100 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f78ba9a5fa0 R15: 00007ffdf023e548
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g15177 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:25752 pid:15    tgid:15    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6760
 __schedule_loop kernel/sched/core.c:6837 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6852
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2044
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2246
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6593 Comm: syz.4.134 Not tainted 6.14.0-rc2-next-20250214-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__sanitizer_cov_trace_pc+0x5d/0x70 kernel/kcov.c:235
Code: 08 16 00 00 83 fa 02 75 21 48 8b 91 10 16 00 00 48 8b 32 48 8d 7e 01 8b 89 0c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90
RSP: 0018:ffffc9001b0673f8 EFLAGS: 00000246
RAX: ffffffff81b62b15 RBX: 1ffff110170c8c99 RCX: 0000000000080000
RDX: ffffc9000ce3c000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9001b067600 R08: ffffffff81b62ae0 R09: 1ffffffff28acc08
R10: dffffc0000000000 R11: fffffbfff28acc09 R12: ffff8880b873fb48
R13: ffff8880b86464c8 R14: ffff8880b873fb40 R15: 0000000000000000
FS:  00007fbafdb296c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c33e178 CR3: 0000000034fcc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 csd_lock_wait kernel/smp.c:340 [inline]
 smp_call_function_many_cond+0x1bc5/0x2d30 kernel/smp.c:885
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2089 [inline]
 text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2299
 text_poke_bp+0xb0/0x100 arch/x86/kernel/alternative.c:2526
 __static_call_transform+0x51a/0x810 arch/x86/kernel/static_call.c:111
 arch_static_call_transform+0x5e/0xc0 arch/x86/kernel/static_call.c:163
 __static_call_update+0xd8/0x5e0 kernel/static_call_inline.c:147
 tracepoint_update_call kernel/tracepoint.c:271 [inline]
 tracepoint_add_func+0x925/0xaa0 kernel/tracepoint.c:312
 tracepoint_probe_register_prio_may_exist+0x122/0x190 kernel/tracepoint.c:435
 bpf_raw_tp_link_attach+0x4a3/0x700 kernel/bpf/syscall.c:3994
 bpf_raw_tracepoint_open+0x177/0x1f0 kernel/bpf/syscall.c:4025
 __sys_bpf+0x3d0/0x840 kernel/bpf/syscall.c:5845
 __do_sys_bpf kernel/bpf/syscall.c:5910 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5908 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5908
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbafcd8cde9
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:00007fbafdb29038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fbafcfa5fa0 RCX: 00007fbafcd8cde9
RDX: 0000000000000018 RSI: 0000400000001040 RDI: 0000000000000011
RBP: 00007fbafce0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbafcfa5fa0 R15: 00007ffdc0e84c98
 </TASK>