rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P19386/1:b..l
(detected by 0, t=10502 jiffies, g=119481, q=6 ncpus=2)
task:syz.4.4575 state:R running task stack:24792 pid:19386 ppid:13639 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x13/0x60 kernel/kcov.c:216
Code: 48 8b 3d f8 5d 10 0d 48 89 de 5b e9 47 b2 56 00 cc cc cc cc cc cc cc 48 8b 04 24 65 48 8b 0d 44 d3 77 7e 65 8b 15 45 d3 77 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00
RSP: 0018:ffffc9000519f080 EFLAGS: 00000293
RAX: ffffffff81b81db3 RBX: 00000000000002dc RCX: ffff888054e69dc0
RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000000040
RBP: 0000000000000000 R08: ffffffff81b81da5 R09: fffff94000258e67
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc9000519f160
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88805658c2c0
xas_reload+0x93/0x470 include/linux/xarray.h:1582
find_get_entry mm/filemap.c:2048 [inline]
find_lock_entries+0x36e/0xda0 mm/filemap.c:2123
shmem_undo_range+0x294/0x2390 mm/shmem.c:925
shmem_truncate_range mm/shmem.c:1062 [inline]
shmem_evict_inode+0x265/0xa60 mm/shmem.c:1171
evict+0x529/0x930 fs/inode.c:701
__dentry_kill+0x436/0x650 fs/dcache.c:611
dentry_kill+0xbb/0x290
dput+0xfb/0x1d0 fs/dcache.c:918
__fput+0x62e/0x8d0 fs/file_table.c:328
task_work_run+0x246/0x300 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0xa73/0x26a0 kernel/exit.c:871
do_group_exit+0x202/0x2b0 kernel/exit.c:1021
get_signal+0x16f7/0x17d0 kernel/signal.c:2871
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f78e2d8040b
RSP: 002b:00007f78e3b90f80 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 00007f78e2d8040b
RDX: 00007f78e3b92010 RSI: 0000000080085502 RDI: 0000000000000003
RBP: 00007f78e2df393e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000020000180
R13: 0000000000000000 R14: 00007f78e2f46080 R15: 00007ffdd4065678
rcu: rcu_preempt kthread timer wakeup didn't happen for 10546 jiffies! g119481 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=77476
rcu: rcu_preempt kthread starved for 10547 jiffies! g119481 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26712 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 1275 Comm: aoe_tx0 Not tainted 6.1.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 b2 e7 25 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 07 52 a2 f6 65 8b 05 c8 31 46 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc9000518f8a0 EFLAGS: 00000206
RAX: f4b3bfd30fd56e00 RBX: 1ffff92000a31f18 RCX: ffffffff816b124a
RDX: dffffc0000000000 RSI: ffffffff8b0c01c0 RDI: 0000000000000001
RBP: ffffc9000518f938 R08: dffffc0000000000 R09: fffffbfff2249879
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000a31f14 R14: ffffc9000518f8c0 R15: 0000000000000246
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd759f91cbd CR3: 000000006930e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
uart_write+0x3ae/0x930 drivers/tty/serial/serial_core.c:584
handle_tx+0x249/0x620 drivers/net/caif/caif_serial.c:236
__netdev_start_xmit include/linux/netdevice.h:4866 [inline]
netdev_start_xmit include/linux/netdevice.h:4880 [inline]
xmit_one net/core/dev.c:3627 [inline]
dev_hard_start_xmit+0x261/0x8c0 net/core/dev.c:3643
__dev_queue_xmit+0x1b5d/0x3d50 net/core/dev.c:4301
dev_queue_xmit include/linux/netdevice.h:3021 [inline]
tx+0x67/0x170 drivers/block/aoe/aoenet.c:63
kthread+0x234/0x450 drivers/block/aoe/aoecmd.c:1237
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295