syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4540/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=7285, q=5 ncpus=2)
task:udevd           state:R  running task     stack:24432 pid:4540  tgid:4540  ppid:1      flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 is_module_text_address+0x147/0x190 kernel/module/main.c:3335
 kernel_text_address+0x96/0xe0 kernel/extable.c:119
 __kernel_text_address+0xd/0x40 kernel/extable.c:79
 unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369
 arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 save_stack+0xfb/0x1f0 mm/page_owner.c:156
 __reset_page_owner+0x75/0x3f0 mm/page_owner.c:297
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1088 [inline]
 free_unref_page+0xd22/0xea0 mm/page_alloc.c:2565
 discard_slab mm/slub.c:2526 [inline]
 __put_partials+0xeb/0x130 mm/slub.c:2994
 put_cpu_partial+0x17c/0x250 mm/slub.c:3069
 __slab_free+0x2ea/0x3d0 mm/slub.c:4306
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4000 [inline]
 kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4007
 getname_flags+0xbd/0x4f0 fs/namei.c:139
 vfs_fstatat+0x11c/0x190 fs/stat.c:303
 __do_sys_newfstatat fs/stat.c:468 [inline]
 __se_sys_newfstatat fs/stat.c:462 [inline]
 __x64_sys_newfstatat+0x125/0x1b0 fs/stat.c:462
 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: 0033:0x7fef23f165f4
RSP: 002b:00007ffd8f3ef9a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 000055edfa1936c0 RCX: 00007fef23f165f4
RDX: 00007ffd8f3ef9b8 RSI: 000055edfa1817ed RDI: 00000000ffffff9c
RBP: 000055ee11ab8fb8 R08: 000000001a557464 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 000055edfa187dca
 </TASK>
rcu: rcu_preempt kthread starved for 231 jiffies! g7285 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:24688 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <IRQ>
 sched_show_task+0x506/0x6d0 kernel/sched/core.c:9191
 rcu_check_gp_kthread_starvation+0x1b8/0x310 kernel/rcu/tree_stall.h:549
 print_other_cpu_stall+0x1470/0x15a0 kernel/rcu/tree_stall.h:658
 check_cpu_stall kernel/rcu/tree_stall.h:799 [inline]
 rcu_pending kernel/rcu/tree.c:4309 [inline]
 rcu_sched_clock_irq+0x9f4/0x10a0 kernel/rcu/tree.c:2636
 update_process_times+0x1ce/0x230 kernel/time/timer.c:2485
 tick_sched_handle kernel/time/tick-sched.c:276 [inline]
 tick_nohz_handler+0x37c/0x500 kernel/time/tick-sched.c:297
 __run_hrtimer kernel/time/hrtimer.c:1687 [inline]
 __hrtimer_run_queues+0x553/0xd50 kernel/time/hrtimer.c:1751
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_next_frame+0x1aba/0x2a00 arch/x86/kernel/unwind_orc.c:648
Code: 0f b6 04 28 84 c0 48 8b 2c 24 48 8b 74 24 10 0f 85 3e 0e 00 00 48 0f bf 03 48 01 c6 48 8d 55 40 48 89 ef e8 98 12 00 00 84 c0 <74> 28 e8 5f 1c 55 00 e9 93 02 00 00 80 3d c1 b9 56 0e 01 0f 85 75
RSP: 0018:ffffc90000a17a08 EFLAGS: 00000202
RAX: 1ffff92000142f01 RBX: ffffffff9030bab8 RCX: dffffc0000000000
RDX: 0000000080000302 RSI: 0000000000000002 RDI: ffffc90000a18f50
RBP: ffffc90000a17ae0 R08: ffffffff81410d5b R09: ffffffff8140f8cf
R10: 0000000000000003 R11: ffff888017ac8000 R12: ffffc90000a18f58
R13: dffffc0000000000 R14: ffffc90000a17b30 R15: 1ffff92000142f5c
 arch_stack_walk+0x151/0x1b0 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:579
 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2195 [inline]
 slab_free mm/slub.c:4436 [inline]
 kfree+0x149/0x360 mm/slub.c:4557
 ieee80211_inform_bss+0xbb2/0x1080 net/mac80211/scan.c:160
 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline]
 cfg80211_inform_single_bss_data+0x104b/0x2330 net/wireless/scan.c:2277
 cfg80211_inform_bss_data+0x3dd/0x5a70 net/wireless/scan.c:3101
 cfg80211_inform_bss_frame_data+0x3bc/0x720 net/wireless/scan.c:3191
 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226
 ieee80211_scan_rx+0x526/0x9c0 net/mac80211/scan.c:340
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5222 [inline]
 ieee80211_rx_list+0x2b00/0x3780 net/mac80211/rx.c:5459
 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5482
 ieee80211_rx include/net/mac80211.h:5093 [inline]
 ieee80211_tasklet_handler+0xeb/0x1f0 net/mac80211/main.c:438
 tasklet_action_common+0x323/0x4d0 kernel/softirq.c:785
 handle_softirqs+0x2c6/0x970 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__try_to_del_timer_sync+0x4/0x340 kernel/time/timer.c:1499
Code: 4a 13 00 48 89 df 31 f6 5b eb 1b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 80 00
RSP: 0018:ffffc90000167ab8 EFLAGS: 00000293
RAX: ffffffff8182d1d4 RBX: 0000000000000000 RCX: ffff888017ac8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000167bc0
RBP: ffffc90000167b90 R08: ffffffff8182d188 R09: 1ffffffff1f5a875
R10: dffffc0000000000 R11: fffffbfff1f5a876 R12: 1ffff9200002cf5c
R13: ffffc90000167bc0 R14: 0000000000000000 R15: dffffc0000000000
 __timer_delete_sync+0x245/0x310 kernel/time/timer.c:1665
 timer_delete_sync kernel/time/timer.c:1720 [inline]
 del_timer_sync include/linux/timer.h:185 [inline]
 schedule_timeout+0x1c8/0x310 kernel/time/timer.c:2582
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 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 PID: 17 Comm: rcu_preempt Not tainted 6.10.0-rc1-syzkaller-00267-gcc8ed4d0a848 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:unwind_next_frame+0x1aba/0x2a00 arch/x86/kernel/unwind_orc.c:648
Code: 0f b6 04 28 84 c0 48 8b 2c 24 48 8b 74 24 10 0f 85 3e 0e 00 00 48 0f bf 03 48 01 c6 48 8d 55 40 48 89 ef e8 98 12 00 00 84 c0 <74> 28 e8 5f 1c 55 00 e9 93 02 00 00 80 3d c1 b9 56 0e 01 0f 85 75
RSP: 0018:ffffc90000a17a08 EFLAGS: 00000202
RAX: 1ffff92000142f01 RBX: ffffffff9030bab8 RCX: dffffc0000000000
RDX: 0000000080000302 RSI: 0000000000000002 RDI: ffffc90000a18f50
RBP: ffffc90000a17ae0 R08: ffffffff81410d5b R09: ffffffff8140f8cf
R10: 0000000000000003 R11: ffff888017ac8000 R12: ffffc90000a18f58
R13: dffffc0000000000 R14: ffffc90000a17b30 R15: 1ffff92000142f5c
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ee11cb4ea0 CR3: 000000007b1f8000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 arch_stack_walk+0x151/0x1b0 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:579
 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2195 [inline]
 slab_free mm/slub.c:4436 [inline]
 kfree+0x149/0x360 mm/slub.c:4557
 ieee80211_inform_bss+0xbb2/0x1080 net/mac80211/scan.c:160
 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline]
 cfg80211_inform_single_bss_data+0x104b/0x2330 net/wireless/scan.c:2277
 cfg80211_inform_bss_data+0x3dd/0x5a70 net/wireless/scan.c:3101
 cfg80211_inform_bss_frame_data+0x3bc/0x720 net/wireless/scan.c:3191
 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226
 ieee80211_scan_rx+0x526/0x9c0 net/mac80211/scan.c:340
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5222 [inline]
 ieee80211_rx_list+0x2b00/0x3780 net/mac80211/rx.c:5459
 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5482
 ieee80211_rx include/net/mac80211.h:5093 [inline]
 ieee80211_tasklet_handler+0xeb/0x1f0 net/mac80211/main.c:438
 tasklet_action_common+0x323/0x4d0 kernel/softirq.c:785
 handle_softirqs+0x2c6/0x970 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__try_to_del_timer_sync+0x4/0x340 kernel/time/timer.c:1499
Code: 4a 13 00 48 89 df 31 f6 5b eb 1b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 80 00
RSP: 0018:ffffc90000167ab8 EFLAGS: 00000293
RAX: ffffffff8182d1d4 RBX: 0000000000000000 RCX: ffff888017ac8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000167bc0
RBP: ffffc90000167b90 R08: ffffffff8182d188 R09: 1ffffffff1f5a875
R10: dffffc0000000000 R11: fffffbfff1f5a876 R12: 1ffff9200002cf5c
R13: ffffc90000167bc0 R14: 0000000000000000 R15: dffffc0000000000
 __timer_delete_sync+0x245/0x310 kernel/time/timer.c:1665
 timer_delete_sync kernel/time/timer.c:1720 [inline]
 del_timer_sync include/linux/timer.h:185 [inline]
 schedule_timeout+0x1c8/0x310 kernel/time/timer.c:2582
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>