rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 1, t=10502 jiffies, g=119713, q=208)
rcu: All QSes seen, last rcu_preempt kthread activity 10454 (4295029459-4295019005), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10454 jiffies! g119713 f0x2 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:28944 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 2289 Comm: syz-executor.3 Not tainted 5.16.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:481
print_other_cpu_stall kernel/rcu/tree_stall.h:586 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq+0x2125/0x2200 kernel/rcu/tree.c:2597
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1428
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:folio_flags.constprop.0+0x2/0x70 include/linux/page-flags.h:259
Code: ff e9 d6 ed ff ff 48 8b 7c 24 38 e8 68 0a a4 ff e9 b1 ed ff ff 48 8b 7c 24 40 e8 d9 09 a4 ff e9 8a ed ff ff cc cc cc cc 41 54 <49> 89 fc 53 e8 c5 c7 5d ff 49 8d 7c 24 08 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc90002927180 EFLAGS: 00000282
RAX: ffffea0000b52080 RBX: 000000000000001d RCX: ffffc90002927058
RDX: 1ffff1100a4c816a RSI: 0000000000000000 RDI: ffffea0000b52080
RBP: ffffea0000b52080 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 000000000000000c
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
folio_test_locked include/linux/page-flags.h:417 [inline]
__readahead_folio include/linux/pagemap.h:1069 [inline]
readahead_page include/linux/pagemap.h:1086 [inline]
ext4_mpage_readpages+0x391/0x1db0 fs/ext4/readpage.c:255
ext4_readahead+0x102/0x140 fs/ext4/inode.c:3199
read_pages+0x1e4/0xfa0 mm/readahead.c:129
page_cache_ra_unbounded+0x64b/0x940 mm/readahead.c:238
do_page_cache_ra mm/readahead.c:268 [inline]
ondemand_readahead+0x594/0x1090 mm/readahead.c:551
page_cache_async_ra mm/readahead.c:608 [inline]
page_cache_async_ra+0x2e1/0x3f0 mm/readahead.c:583
page_cache_async_readahead include/linux/pagemap.h:1052 [inline]
filemap_readahead mm/filemap.c:2531 [inline]
filemap_get_pages+0x6f1/0x1be0 mm/filemap.c:2572
filemap_read+0x315/0xeb0 mm/filemap.c:2642
generic_file_read_iter+0x3b6/0x5a0 mm/filemap.c:2792
ext4_file_read_iter+0x1d4/0x5d0 fs/ext4/file.c:130
call_read_iter include/linux/fs.h:2156 [inline]
generic_file_splice_read+0x453/0x6d0 fs/splice.c:311
do_splice_to+0x1bf/0x250 fs/splice.c:796
splice_direct_to_actor+0x2c2/0x8c0 fs/splice.c:870
do_splice_direct+0x1b3/0x280 fs/splice.c:979
do_sendfile+0xaf2/0x1250 fs/read_write.c:1245
__do_sys_sendfile64 fs/read_write.c:1310 [inline]
__se_sys_sendfile64 fs/read_write.c:1296 [inline]
__x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7efd588eae99
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efd57260168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007efd589fdf60 RCX: 00007efd588eae99
RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000005
RBP: 00007efd58944ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffa R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc14ab8c3f R14: 00007efd57260300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: e9 d6 ed ff ff jmpq 0xffffeddb
5: 48 8b 7c 24 38 mov 0x38(%rsp),%rdi
a: e8 68 0a a4 ff callq 0xffa40a77
f: e9 b1 ed ff ff jmpq 0xffffedc5
14: 48 8b 7c 24 40 mov 0x40(%rsp),%rdi
19: e8 d9 09 a4 ff callq 0xffa409f7
1e: e9 8a ed ff ff jmpq 0xffffedad
23: cc int3
24: cc int3
25: cc int3
26: cc int3
27: 41 54 push %r12
* 29: 49 89 fc mov %rdi,%r12 <-- trapping instruction
2c: 53 push %rbx
2d: e8 c5 c7 5d ff callq 0xff5dc7f7
32: 49 8d 7c 24 08 lea 0x8(%r12),%rdi
37: 48 rex.W
38: b8 00 00 00 00 mov $0x0,%eax
3d: 00 fc add %bh,%ah