rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10500 ticks this GP) idle=0fd/1/0x4000000000000000 softirq=204617/204617 fqs=17
(t=10502 jiffies g=342597 q=102)
rcu: rcu_preempt kthread starved for 10456 jiffies! g342597 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:28472 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18407 Comm: syz-executor.2 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_preemption_disabled+0x28/0x170 lib/smp_processor_id.c:16
Code: cc cc 41 56 41 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 7d 95 bd 76 65 8b 1d ee ef bd 76 81 e3 ff ff ff 7f <31> ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b
RSP: 0018:ffffc90000fd8d68 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000010002 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff89abf940 RDI: ffffffff8a0491e0
RBP: ffffffff8a0491e0 R08: 0000000000000000 R09: ffffffff8d90fad7
R10: fffffbfff1b21f5a R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff89abf940 R14: 00000000ffffffff R15: ffff8880b04acbd8
FS: 00007fe0a38bc700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e437000 CR3: 000000014e36e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:438 [inline]
lock_is_held_type+0xd7/0x140 kernel/locking/lockdep.c:5681
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x522/0x720 kernel/locking/lockdep.c:5648
seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
ktime_get_update_offsets_now+0x93/0x5c0 kernel/time/timekeeping.c:2297
hrtimer_update_base kernel/time/hrtimer.c:631 [inline]
hrtimer_interrupt+0x142/0x790 kernel/time/hrtimer.c:1793
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:node_dirty_limit mm/page-writeback.c:476 [inline]
RIP: 0010:node_dirty_ok+0x143/0x270 mm/page-writeback.c:497
Code: 89 e7 49 01 c5 e8 fd 2b 07 00 31 ff 49 01 c5 49 29 dd 48 8b 1d de 43 ae 0e 65 48 8b 2c 25 40 70 02 00 48 89 de e8 1d e6 d7 ff <48> 85 db 0f 85 b3 00 00 00 e8 7f e3 d7 ff 48 63 15 d8 0e 27 0a 4c
RSP: 0018:ffffc90002967000 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8880b04ac100 RDI: 0000000000000003
RBP: ffff8880b04ac100 R08: 0000000000000000 R09: ffff88813fffef27
R10: ffffffff819f0413 R11: 0000000000000001 R12: ffff88813fffa000
R13: 000000000001475e R14: 0000000000000000 R15: ffff88813fffbc00
get_page_from_freelist+0x1d3/0x2f50 mm/page_alloc.c:4080
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369
alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191
folio_alloc+0x1c/0x70 mm/mempolicy.c:2201
filemap_alloc_folio mm/filemap.c:1036 [inline]
__filemap_get_folio+0x5f2/0xd60 mm/filemap.c:1951
pagecache_get_page+0x2c/0x1a0 mm/folio-compat.c:125
ext4_da_write_begin+0x3bc/0xad0 fs/ext4/inode.c:2958
generic_perform_write+0x205/0x510 mm/filemap.c:3754
ext4_buffered_write_iter+0x1ac/0x3b0 fs/ext4/file.c:269
ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:681
call_write_iter include/linux/fs.h:2162 [inline]
do_iter_readv_writev+0x472/0x750 fs/read_write.c:725
do_iter_write+0x188/0x710 fs/read_write.c:851
vfs_iter_write+0x70/0xa0 fs/read_write.c:892
iter_file_splice_write+0x6fa/0xc10 fs/splice.c:689
do_splice_from fs/splice.c:767 [inline]
direct_splice_actor+0x110/0x180 fs/splice.c:936
splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891
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: 0033:0x7fe0a4f46e99
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:00007fe0a38bc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fe0a5059f60 RCX: 00007fe0a4f46e99
RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000000005
RBP: 00007fe0a4fa0ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffebde7d1af R14: 00007fe0a38bc300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 18395 Comm: syz-executor.3 Not tainted 5.16.0-rc5-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_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 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:ext4_inode_table+0xca/0x110 fs/ext4/super.c:315
Code: 28 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 21 8b 43 28 <48> c1 e0 20 49 09 c4 e8 3a fd 57 ff 4c 89 e0 5b 5d 41 5c c3 e8 0d
RSP: 0018:ffffc90000edf0c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88807f357000 RCX: ffffc90005a8a000
RDX: 0000000000000000 RSI: ffffffff821eea2d RDI: ffff88807f357028
RBP: 0000000000000040 R08: 000000000000003f R09: 0000000000000000
R10: ffffffff821eea22 R11: 0000000000000000 R12: 0000000000000091
R13: 0000000000000010 R14: 00000000000004be R15: ffff88814ae76000
__ext4_get_inode_loc+0x26c/0x13f0 fs/ext4/inode.c:4413
ext4_get_inode_loc fs/ext4/inode.c:4544 [inline]
ext4_reserve_inode_write+0x159/0x3c0 fs/ext4/inode.c:5713
__ext4_mark_inode_dirty+0x17b/0x8d0 fs/ext4/inode.c:5882
ext4_dirty_inode+0xd4/0x110 fs/ext4/inode.c:5919
__mark_inode_dirty+0x45b/0xfe0 fs/fs-writeback.c:2399
mark_inode_dirty include/linux/fs.h:2451 [inline]
generic_write_end+0x31b/0x500 fs/buffer.c:2202
ext4_da_write_end+0x1c2/0x990 fs/ext4/inode.c:3059
generic_perform_write+0x2c6/0x510 mm/filemap.c:3765
ext4_buffered_write_iter+0x1ac/0x3b0 fs/ext4/file.c:269
ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:681
call_write_iter include/linux/fs.h:2162 [inline]
do_iter_readv_writev+0x472/0x750 fs/read_write.c:725
do_iter_write+0x188/0x710 fs/read_write.c:851
vfs_iter_write+0x70/0xa0 fs/read_write.c:892
iter_file_splice_write+0x6fa/0xc10 fs/splice.c:689
do_splice_from fs/splice.c:767 [inline]
direct_splice_actor+0x110/0x180 fs/splice.c:936
splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891
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: 0033:0x7f22842a9e99
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:00007f2282c1f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f22843bcf60 RCX: 00007f22842a9e99
RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000000005
RBP: 00007f2284303ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffff2a196ff R14: 00007f2282c1f300 R15: 0000000000022000
sched: RT throttling activated
----------------
Code disassembly (best guess):
0: cc int3
1: cc int3
2: 41 56 push %r14
4: 41 55 push %r13
6: 49 89 f5 mov %rsi,%r13
9: 41 54 push %r12
b: 55 push %rbp
c: 48 89 fd mov %rdi,%rbp
f: 53 push %rbx
10: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
15: 65 44 8b 25 7d 95 bd mov %gs:0x76bd957d(%rip),%r12d # 0x76bd959a
1c: 76
1d: 65 8b 1d ee ef bd 76 mov %gs:0x76bdefee(%rip),%ebx # 0x76bdf012
24: 81 e3 ff ff ff 7f and $0x7fffffff,%ebx
* 2a: 31 ff xor %edi,%edi <-- trapping instruction
2c: 89 de mov %ebx,%esi
2e: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
33: 85 db test %ebx,%ebx
35: 74 11 je 0x48
37: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
3c: 44 89 e0 mov %r12d,%eax
3f: 5b pop %rbx