rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P25311/1:b..l
(detected by 0, t=10502 jiffies, g=143245, q=54 ncpus=2)
task:syz-executor.0 state:R running task stack:26744 pid:25311 ppid:13984 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5209 [inline]
__schedule+0x8fc/0xda0 kernel/sched/core.c:6521
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6833
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x21e/0x400 kernel/locking/lockdep.c:5672
Code: 23 00 74 08 4c 89 f7 e8 60 a7 75 00 f6 44 24 61 02 0f 85 76 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 2c 00 00 00 00 43 c7 44 2c 09 00 00 00 00 43 c7 44 2c 11
RSP: 0018:ffffc90009147480 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92001228e9c RCX: ffff8880942d2788
RDX: dffffc0000000000 RSI: ffffffff8b0da320 RDI: ffffffff8b68fd00
RBP: ffffc900091475c8 R08: dffffc0000000000 R09: fffffbfff20e4c31
R10: fffffbfff20e4c31 R11: 1ffffffff20e4c30 R12: dffffc0000000000
R13: 1ffff92001228e98 R14: ffffc900091474e0 R15: 0000000000000246
down_read_trylock+0x386/0x3d0 kernel/locking/rwsem.c:1551
folio_lock_anon_vma_read+0xff/0x3b0 mm/rmap.c:552
rmap_walk_anon_lock mm/rmap.c:2386 [inline]
rmap_walk_anon+0x7a/0x6a0 mm/rmap.c:2433
try_to_migrate+0x3ea/0x4d0
__unmap_and_move+0x595/0xdb0 mm/migrate.c:1107
unmap_and_move+0x39a/0x1090 mm/migrate.c:1184
migrate_pages+0x572/0x1470 mm/migrate.c:1461
migrate_to_node mm/mempolicy.c:1087 [inline]
do_migrate_pages+0x78f/0x9e0 mm/mempolicy.c:1186
kernel_migrate_pages mm/mempolicy.c:1663 [inline]
__do_sys_migrate_pages mm/mempolicy.c:1682 [inline]
__se_sys_migrate_pages+0xd26/0xdf0 mm/mempolicy.c:1678
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fba22e8c0d9
RSP: 002b:00007fba23c77168 EFLAGS: 00000246 ORIG_RAX: 0000000000000100
RAX: ffffffffffffffda RBX: 00007fba22fac120 RCX: 00007fba22e8c0d9
RDX: 0000000020000000 RSI: 0000000000000005 RDI: 0000000000000000
RBP: 00007fba22ee7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdc873faff R14: 00007fba23c77300 R15: 0000000000022000
</TASK>
rcu: rcu_preempt kthread starved for 10535 jiffies! g143245 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:26400 pid:16 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5209 [inline]
__schedule+0x8fc/0xda0 kernel/sched/core.c:6521
schedule+0xcb/0x190 kernel/sched/core.c:6597
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
rcu_gp_fqs_loop+0x309/0x1070 kernel/rcu/tree.c:1660
rcu_gp_kthread+0xa5/0x390 kernel/rcu/tree.c:1859
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 25320 Comm: syz-executor.2 Not tainted 6.1.0-rc6-syzkaller-00251-g0b1dcc2cf55a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:rb_insert_color+0x3/0x640 lib/rbtree.c:435
Code: 24 4c 89 f7 4c 89 ee 48 8b 44 24 18 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d ff e0 66 2e 0f 1f 84 00 00 00 00 00 90 55 41 57 <41> 56 41 55 41 54 53 48 83 ec 38 48 89 f3 48 89 fd 49 bc 00 00 00
RSP: 0018:ffffc900001e0c58 EFLAGS: 00000082
RAX: 1ffffffff23ec77a RBX: ffffffff91f63b01 RCX: dffffc0000000000
RDX: 0000000000000018 RSI: ffffffff91f63bc8 RDI: ffff888017d4c0b0
RBP: 1ffff11002fa9816 R08: dffffc0000000000 R09: ffff888017d4c0b0
R10: ffffed1002fa9819 R11: 1ffff11002fa9816 R12: ffffffff91f63bc8
R13: ffff888017d4c0b0 R14: 0000000000000000 R15: ffff888017d4c0b0
FS: 00007f5fdc1d9700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c823000 CR3: 000000007838a000 CR4: 00000000003506e0
Call Trace:
<IRQ>
rb_insert_color_cached include/linux/rbtree.h:114 [inline]
rb_add_cached include/linux/rbtree.h:183 [inline]
timerqueue_add+0x25f/0x280 lib/timerqueue.c:40
alarmtimer_enqueue kernel/time/alarmtimer.c:165 [inline]
alarmtimer_fired+0x251/0x380 kernel/time/alarmtimer.c:215
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3a6/0xfd0 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x280 arch/x86/kernel/apic/apic.c:1113
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1107
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:fault_in_iov_iter_readable+0x1/0x2a0 lib/iov_iter.c:353
Code: cc 50 fd eb 05 e8 1f cc 50 fd b8 ea ff ff ff 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc cc cc cc cc cc cc 55 <41> 57 41 56 41 55 41 54 53 49 89 f6 49 89 ff 48 bb 00 00 00 00 00
RSP: 0018:ffffc900091b73b0 EFLAGS: 00000202
RAX: 1ffff92001236f3a RBX: 0000000000000c60 RCX: 0000000000000002
RDX: ffff888074fcd7c0 RSI: 0000000000000020 RDI: ffffc900091b79c0
RBP: ffffc900091b74f8 R08: ffffffff81babb04 R09: fffffbfff20e4c3c
R10: fffffbfff20e4c3c R11: 1ffffffff20e4c3b R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000020 R15: ffffc900091b79c0
generic_perform_write+0x216/0x610 mm/filemap.c:3743
ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:285
ext4_file_write_iter+0x1d0/0x18e0
do_iter_write+0x6f0/0xc50 fs/read_write.c:861
iter_file_splice_write+0x830/0xff0 fs/splice.c:686
do_splice_from fs/splice.c:764 [inline]
direct_splice_actor+0xe6/0x1c0 fs/splice.c:931
splice_direct_to_actor+0x4e4/0xc00 fs/splice.c:886
do_splice_direct+0x2a0/0x3f0 fs/splice.c:974
do_sendfile+0x641/0xfd0 fs/read_write.c:1255
__do_sys_sendfile64 fs/read_write.c:1317 [inline]
__se_sys_sendfile64+0xfc/0x1e0 fs/read_write.c:1309
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5fdb48c0d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5fdc1d9168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f5fdb5ac120 RCX: 00007f5fdb48c0d9
RDX: 00000000200001c0 RSI: 0000000000000006 RDI: 0000000000000006
RBP: 00007f5fdb4e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000200a198 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd8fa7068f R14: 00007f5fdc1d9300 R15: 0000000000022000
</TASK>