rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=3854/1/0x4000000000000000 softirq=80286/80287 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P21996/1:b..l
rcu: (detected by 0, t=10505 jiffies, g=125485, q=96 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 22062 Comm: syz-executor.5 Not tainted 6.4.0-next-20230706-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
RIP: 0010:lock_acquire kernel/locking/lockdep.c:5763 [inline]
RIP: 0010:lock_acquire+0x1ce/0x520 kernel/locking/lockdep.c:5726
Code: ff 74 24 20 45 0f b6 c9 e8 af 8c ff ff 48 c7 c7 60 73 6c 8a 48 83 c4 28 e8 1f 79 b9 08 b8 ff ff ff ff 65 0f c1 05 42 36 9c 7e <83> f8 01 0f 85 b9 02 00 00 9c 58 f6 c4 02 0f 85 a4 02 00 00 48 83
RSP: 0018:ffffc900001e0c28 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 1ffff9200003c187 RCX: fc76794eeabd53a6
RDX: 1ffff11011c13158 RSI: 0000000000010001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff230dfc0
R10: ffffffff9186fe07 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff8d35b520 R15: 0000000000000000
FS: 00007f305925e700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00c4d3000 CR3: 00000000629bd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
debug_objects_fill_pool lib/debugobjects.c:614 [inline]
debug_object_activate+0x128/0x4f0 lib/debugobjects.c:713
debug_hrtimer_activate kernel/time/hrtimer.c:422 [inline]
debug_activate kernel/time/hrtimer.c:477 [inline]
enqueue_hrtimer+0x27/0x320 kernel/time/hrtimer.c:1087
__run_hrtimer kernel/time/hrtimer.c:1705 [inline]
__hrtimer_run_queues+0xa65/0xc00 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x320/0x7b0 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1098 [inline]
__sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1115
sysvec_apic_timer_interrupt+0x92/0xc0 arch/x86/kernel/apic/apic.c:1109
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:101 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:127 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:178 [inline]
RIP: 0010:kasan_check_range+0x64/0x190 mm/kasan/generic.c:187
Code: 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 d1 48 c1 ed 03 49 c1 e9 03 48 01 c5 49 01 c1 48 89 e8 49 8d 59 01 48 89 da 48 29 ea <48> 83 fa 10 0f 8e 8a 00 00 00 41 89 eb 41 83 e3 07 0f 85 97 00 00
RSP: 0018:ffffc9000c56f8d8 EFLAGS: 00000202
RAX: fffff9400028e5a8 RBX: fffff9400028e5a9 RCX: ffffffff81bb58d5
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffea0001472d40
RBP: fffff9400028e5a8 R08: 0000000000000000 R09: fffff9400028e5a8
R10: ffffea0001472d47 R11: 0000000000000001 R12: ffff8880293cb6c0
R13: ffffea0001472d40 R14: dffffc0000000000 R15: 0000000000000cc0
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
folio_test_head include/linux/page-flags.h:769 [inline]
folio_test_large include/linux/page-flags.h:790 [inline]
folio_order include/linux/mm.h:1061 [inline]
shmem_add_to_page_cache+0xa35/0xd50 mm/shmem.c:700
shmem_get_folio_gfp+0x58a/0x1a80 mm/shmem.c:1995
shmem_get_folio mm/shmem.c:2096 [inline]
shmem_write_begin+0x14a/0x380 mm/shmem.c:2596
generic_perform_write+0x26b/0x5d0 mm/filemap.c:3925
__generic_file_write_iter+0x1f8/0x240 mm/filemap.c:4020
generic_file_write_iter+0xe3/0x350 mm/filemap.c:4046
call_write_iter include/linux/fs.h:1873 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x981/0xda0 fs/read_write.c:584
ksys_write+0x122/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f305843dfff
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48
RSP: 002b:00007f305925df10 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f305843dfff
RDX: 0000000001000000 RSI: 00007f304ebff000 RDI: 0000000000000003
RBP: 00007f304ebff000 R08: 0000000000000000 R09: 00000000000097a2
R10: 0000000001000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f305925dfdc R14: 00007f305925dfe0 R15: 00000000200001c2
task:syz-executor.2 state:R running task stack:22496 pid:21996 ppid:19742 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0xc9a/0x5880 kernel/sched/core.c:6709
preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7021
irqentry_exit+0x35/0x80 kernel/entry/common.c:433
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:68 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
RIP: 0010:folio_memcg_lock+0x18a/0x6d0 mm/memcontrol.c:2137
Code: 13 df 81 58 e8 b7 35 87 ff 4d 85 ed 0f 85 4b 03 00 00 9c 58 f6 c4 02 0f 85 ee 03 00 00 4d 85 ed 74 01 fb 4c 8d ab 40 09 00 00 04 00 00 00 4c 89 ef e8 49 66 f8 ff 4c 89 e8 48 c1 e8 03 42 0f
RSP: 0018:ffffc9000baae880 EFLAGS: 00000206
RAX: 0000000000000002 RBX: ffff88802009e000 RCX: 1ffffffff2316458
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000baae8d0 R08: 0000000000000001 R09: fffffbfff230dfd4
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff88802009e940 R14: ffffea0001472d38 R15: ffffea0001472d08
__folio_start_writeback+0x106/0xa60 mm/page-writeback.c:3016
ext4_bio_write_folio+0x554/0x1ae0 fs/ext4/page-io.c:557
mpage_submit_folio+0x1c9/0x350 fs/ext4/inode.c:1865
mpage_map_and_submit_buffers+0x574/0xaf0 fs/ext4/inode.c:2111
mpage_map_and_submit_extent fs/ext4/inode.c:2251 [inline]
ext4_do_writepages+0x196f/0x3290 fs/ext4/inode.c:2677
ext4_writepages+0x304/0x770 fs/ext4/inode.c:2766
do_writepages+0x1a8/0x640 mm/page-writeback.c:2553
filemap_fdatawrite_wbc mm/filemap.c:393 [inline]
filemap_fdatawrite_wbc+0x147/0x1b0 mm/filemap.c:383
__filemap_fdatawrite_range+0xb8/0xf0 mm/filemap.c:426
file_write_and_wait_range+0xce/0x140 mm/filemap.c:784
ext4_sync_file+0x254/0xe20 fs/ext4/fsync.c:159
vfs_fsync_range+0x144/0x230 fs/sync.c:188
generic_write_sync include/linux/fs.h:2495 [inline]
generic_write_sync include/linux/fs.h:2492 [inline]
ext4_buffered_write_iter+0x2fb/0x3d0 fs/ext4/file.c:305
ext4_file_write_iter+0x8f2/0x1880 fs/ext4/file.c:722
__kernel_write_iter+0x262/0x7e0 fs/read_write.c:517
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x23c/0x710 fs/coredump.c:915
elf_core_dump+0x27f4/0x3790 fs/binfmt_elf.c:2142
do_coredump+0x2db7/0x3d60 fs/coredump.c:764
get_signal+0x1c16/0x25f0 kernel/signal.c:2863
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310
exc_page_fault+0xc0/0x170 arch/x86/mm/fault.c:1568
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x9b9beb60
RSP: 002b:00000000200000e8 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fc3127abf80 RCX: 00007fc31268c389
RDX: 0000000020000100 RSI: 00000000200000e0 RDI: 0000000040269000
RBP: 00007fc3126d7493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000140 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fffd982919f R14: 00007fc313427300 R15: 0000000000022000
rcu: rcu_preempt kthread starved for 10505 jiffies! g125485 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:27976 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0xc9a/0x5880 kernel/sched/core.c:6709
schedule+0xde/0x1a0 kernel/sched/core.c:6785
schedule_timeout+0x14e/0x2b0 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1609
rcu_gp_kthread+0x23a/0x360 kernel/rcu/tree.c:1808
kthread+0x344/0x440 kernel/kthread.c:389
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 17068 Comm: kworker/u4:38 Not tainted 6.4.0-next-20230706-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:300 [inline]
RIP: 0010:smp_call_function_many_cond+0x694/0x1720 kernel/smp.c:844
Code: 89 ee e8 5f 4f 0b 00 85 ed 74 48 48 8b 44 24 08 49 89 c4 83 e0 07 49 c1 ec 03 48 89 c5 4d 01 f4 83 c5 03 e8 9e 52 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 d1 0d 00 00 8b 43 08 31
RSP: 0018:ffffc900051ef948 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9943020 RCX: 0000000000000000
RDX: ffff88807dfc8000 RSI: ffffffff817995f2 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffed1017328605
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c84bfe000 CR3: 000000000c775000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x5a/0xa0 kernel/smp.c:1012
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1938 [inline]
text_poke_bp_batch+0x24f/0x780 arch/x86/kernel/alternative.c:2148
text_poke_flush arch/x86/kernel/alternative.c:2339 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2336 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2346
arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x32f/0x410 kernel/jump_label.c:829
static_key_enable_cpuslocked+0x1b5/0x270 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate mm/kfence/core.c:831 [inline]
toggle_allocation_gate+0xf8/0x230 mm/kfence/core.c:823
process_one_work+0xa34/0x16f0 kernel/workqueue.c:2597
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2748
kthread+0x344/0x440 kernel/kthread.c:389
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308