rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-0): P6212/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=36701, q=4292 ncpus=1)
task:syz.4.108 state:R running task stack:25720 pid:6212 tgid:6210 ppid:5716 task_flags:0x400140 flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256
irqentry_exit+0x6f/0x90 kernel/entry/common.c:211
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:kasan_byte_accessible+0x0/0x30 mm/kasan/generic.c:204
Code: ff ff 0f b6 d2 e8 d0 ee ff ff 34 01 e9 1c ff ff ff 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <0f> 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df 0f b6 04 07
RSP: 0018:ffffc9000db37378 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff8173cd42 RCX: 06015ed6b6191600
RDX: 0000000000000000 RSI: ffffffff8173cd42 RDI: ffffffff8e13d2e0
RBP: ffffffff8173cd25 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000db37558 R11: ffffffff81ac6cd0 R12: 0000000000000002
R13: ffffffff8e13d2e0 R14: ffffffff8e13d2e0 R15: 0000000000000000
__kasan_check_byte+0x12/0x40 mm/kasan/common.c:579
kasan_check_byte include/linux/kasan.h:401 [inline]
lock_acquire+0x8d/0x360 kernel/locking/lockdep.c:5842
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:867 [inline]
class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
__kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2523 [inline]
slab_free mm/slub.c:6611 [inline]
kfree+0x19a/0x6d0 mm/slub.c:6818
free_slab_obj_exts mm/slub.c:2187 [inline]
unaccount_slab mm/slub.c:3180 [inline]
__free_slab+0xb9/0x1a0 mm/slub.c:3280
discard_slab mm/slub.c:3310 [inline]
__put_partials+0x146/0x170 mm/slub.c:3857
put_cpu_partial+0x1f2/0x2e0 mm/slub.c:3932
__slab_free+0x2b9/0x390 mm/slub.c:5906
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4955 [inline]
slab_alloc_node mm/slub.c:5265 [inline]
__do_kmalloc_node mm/slub.c:5626 [inline]
__kmalloc_noprof+0x3c3/0x7f0 mm/slub.c:5639
kmalloc_noprof include/linux/slab.h:961 [inline]
tomoyo_realpath_from_path+0xe3/0x5d0 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_number_perm+0x1e8/0x5a0 security/tomoyo/file.c:723
security_file_ioctl+0xcb/0x2d0 security/security.c:2982
__do_sys_ioctl fs/ioctl.c:591 [inline]
__se_sys_ioctl+0x47/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6ab758e929
RSP: 002b:00007f6ab8382038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6ab77b5fa0 RCX: 00007f6ab758e929
RDX: 0000000000000000 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007f6ab7610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6ab77b5fa0 R15: 00007fff3f508198
rcu: rcu_preempt kthread starved for 3054 jiffies! g36701 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:28776 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 6025 Comm: syz.1.42 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ieee80211_prepare_and_rx_handle+0x501/0x6770 net/mac80211/rx.c:-1
Code: 89 c6 e8 22 2f f5 f6 85 db 0f 84 b7 09 00 00 e8 d5 2a f5 f6 31 c0 e9 cc 30 00 00 e8 c9 2a f5 f6 e9 de 11 00 00 e8 bf 2a f5 f6 <48> 8b 1c 24 4d 85 f6 0f 84 fa 00 00 00 4c 89 74 24 08 48 8b 44 24
RSP: 0018:ffffc900000077c0 EFLAGS: 00000246
RAX: ffffffff8acb260b RBX: 0000000000000001 RCX: ffff888046418000
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900000079f0 R08: 0000000000000000 R09: 000000000000000c
R10: 000000000000000c R11: 0000000000000100 R12: dffffc0000000000
R13: ffffc90000007ad8 R14: 0000000000000000 R15: 1ffff92000000f5b
FS: 00007ff41444e6c0(0000) GS:ffff88808d301000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000016104d4 CR3: 0000000046a8b000 CR4: 0000000000352ef0
Call Trace:
__ieee80211_rx_handle_packet net/mac80211/rx.c:5312 [inline]
ieee80211_rx_list+0x2285/0x2b90 net/mac80211/rx.c:5447
ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5470
ieee80211_rx include/net/mac80211.h:5214 [inline]
ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453
tasklet_action_common+0x36c/0x580 kernel/softirq.c:925
handle_softirqs+0x286/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:page_table_check_clear+0x21/0x700 mm/page_table_check.c:70
Code: 90 90 90 90 90 90 90 90 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 18 49 89 f6 49 89 fc e8 e7 af 8d ff 4c 89 e7 e8 af 19 00 00 <89> c5 31 ff 89 c6 e8 14 b4 8d ff 85 ed 0f 84 98 01 00 00 48 b9 00
RSP: 0018:ffffc9000d65f510 EFLAGS: 00000293
RAX: 0000000000000001 RBX: ffff888046a82a10 RCX: ffff888046418000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000d65f830 R08: 0000000000000000 R09: ffffffff8232be1a
R10: dffffc0000000000 R11: ffffed1008d77eee R12: 000000000004a1ee
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff888046bbf768
page_table_check_pte_clear include/linux/page_table_check.h:51 [inline]
ptep_get_and_clear arch/x86/include/asm/pgtable.h:1254 [inline]
__ptep_modify_prot_start include/linux/pgtable.h:1341 [inline]
ptep_modify_prot_start include/linux/pgtable.h:1374 [inline]
modify_prot_start_ptes include/linux/pgtable.h:1420 [inline]
change_pte_range mm/mprotect.c:328 [inline]
change_pmd_range mm/mprotect.c:567 [inline]
change_pud_range mm/mprotect.c:630 [inline]
change_p4d_range mm/mprotect.c:656 [inline]
change_protection_range mm/mprotect.c:684 [inline]
change_protection+0x3480/0x4030 mm/mprotect.c:718
change_prot_numa+0xd8/0x3d0 mm/mempolicy.c:823
task_numa_work+0xdbd/0x1580 kernel/sched/fair.c:3478
task_work_run+0x1d4/0x260 kernel/task_work.c:227
get_signal+0x11ec/0x1340 kernel/signal.c:2807
arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff41358e929
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:00007ff41444e0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007ff4137b5fa8 RCX: 00007ff41358e929
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff4137b5fa8
RBP: 00007ff4137b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff4137b5fac
R13: 0000000000000000 R14: 00007fff0880bf50 R15: 00007fff0880c038