rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10500 ticks this GP) idle=789/1/0x4000000000000000 softirq=20063/20063 fqs=0
(t=10501 jiffies g=28477 q=139)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g28477 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=12352
rcu: rcu_preempt kthread starved for 10504 jiffies! g28477 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:28936 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4900 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 0
CPU: 0 PID: 8251 Comm: syz-executor.4 Not tainted 5.16.0-rc7-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_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq.cold+0x57/0x759 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:memcg_slab_pre_alloc_hook mm/slab.h:287 [inline]
RIP: 0010:slab_pre_alloc_hook mm/slab.h:497 [inline]
RIP: 0010:slab_alloc mm/slab.c:3306 [inline]
RIP: 0010:kmem_cache_alloc+0x9b/0x560 mm/slab.c:3507
Code: 75 0a f6 43 23 04 0f 84 97 00 00 00 e8 fe 90 06 00 48 85 c0 48 89 c5 0f 84 86 00 00 00 8b 53 14 44 89 e6 48 89 c7 48 83 c2 08 a0 a5 06 00 85 c0 74 72 e8 a7 7c a5 ff 31 d2 45 31 c9 45 31 c0
RSP: 0018:ffffc900113df290 EFLAGS: 00000216
RAX: ffff888075287d00 RBX: ffff888011dc9f00 RCX: ffffc900113df1e8
RDX: 00000000000000f0 RSI: 0000000000408d40 RDI: ffff888075287d00
RBP: ffff888075287d00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000408d40
R13: 0000000000408d40 R14: 0000000000000400 R15: 00000000000000a8
kmem_cache_zalloc include/linux/slab.h:714 [inline]
alloc_buffer_head+0x20/0x140 fs/buffer.c:3309
alloc_page_buffers+0x268/0x5f0 fs/buffer.c:832
create_empty_buffers+0x2c/0x800 fs/buffer.c:1560
ext4_block_write_begin+0xd1d/0x1140 fs/ext4/inode.c:1060
ext4_da_write_begin+0x3eb/0xad0 fs/ext4/inode.c:2966
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: 0033:0x7f4f2b53ae99
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:00007f4f29eb0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f4f2b64df60 RCX: 00007f4f2b53ae99
RDX: 0000000000000000 RSI: 0000000000000013 RDI: 0000000000000005
RBP: 00007f4f2b594ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff4187a21f R14: 00007f4f29eb0300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 8251 Comm: syz-executor.4 Not tainted 5.16.0-rc7-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+0x5c/0x759 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:memcg_slab_pre_alloc_hook mm/slab.h:287 [inline]
RIP: 0010:slab_pre_alloc_hook mm/slab.h:497 [inline]
RIP: 0010:slab_alloc mm/slab.c:3306 [inline]
RIP: 0010:kmem_cache_alloc+0x9b/0x560 mm/slab.c:3507
Code: 75 0a f6 43 23 04 0f 84 97 00 00 00 e8 fe 90 06 00 48 85 c0 48 89 c5 0f 84 86 00 00 00 8b 53 14 44 89 e6 48 89 c7 48 83 c2 08 a0 a5 06 00 85 c0 74 72 e8 a7 7c a5 ff 31 d2 45 31 c9 45 31 c0
RSP: 0018:ffffc900113df290 EFLAGS: 00000216
RAX: ffff888075287d00 RBX: ffff888011dc9f00 RCX: ffffc900113df1e8
RDX: 00000000000000f0 RSI: 0000000000408d40 RDI: ffff888075287d00
RBP: ffff888075287d00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000408d40
R13: 0000000000408d40 R14: 0000000000000400 R15: 00000000000000a8
kmem_cache_zalloc include/linux/slab.h:714 [inline]
alloc_buffer_head+0x20/0x140 fs/buffer.c:3309
alloc_page_buffers+0x268/0x5f0 fs/buffer.c:832
create_empty_buffers+0x2c/0x800 fs/buffer.c:1560
ext4_block_write_begin+0xd1d/0x1140 fs/ext4/inode.c:1060
ext4_da_write_begin+0x3eb/0xad0 fs/ext4/inode.c:2966
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: 0033:0x7f4f2b53ae99
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:00007f4f29eb0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f4f2b64df60 RCX: 00007f4f2b53ae99
RDX: 0000000000000000 RSI: 0000000000000013 RDI: 0000000000000005
RBP: 00007f4f2b594ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff4187a21f R14: 00007f4f29eb0300 R15: 0000000000022000
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8252 Comm: syz-executor.5 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0xc/0x70 kernel/kcov.c:293
Code: 4c 38 f0 48 c7 44 38 e0 05 00 00 00 48 89 74 38 e8 4e 89 54 c8 20 48 89 10 c3 0f 1f 40 00 49 89 f8 bf 03 00 00 00 4c 8b 14 24 <48> 89 f1 65 48 8b 34 25 40 70 02 00 e8 a3 f8 ff ff 84 c0 74 48 48
RSP: 0018:ffffc90000fd8a28 EFLAGS: 00000046
RAX: 0000000080010001 RBX: ffffc90000fd8b20 RCX: 0000000000000000
RDX: ffff888074ee0140 RSI: 0000000000000000 RDI: 0000000000000003
RBP: ffffc90000fd8c80 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff819863a2 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88802c274140 R14: 0000000000000000 R15: ffffc90000fd8b20
FS: 00007f8740189700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e538000 CR3: 000000007c7ac000 CR4: 00000000003526e0
Call Trace:
perf_prepare_sample+0x1e2/0x1e30 kernel/events/core.c:7314
__perf_event_output kernel/events/core.c:7487 [inline]
perf_event_output_forward+0xda/0x280 kernel/events/core.c:7507
__perf_event_overflow+0x13c/0x3d0 kernel/events/core.c:9207
perf_swevent_hrtimer+0x37c/0x3f0 kernel/events/core.c:10600
__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:check_preemption_disabled+0x4/0x170 lib/smp_processor_id.c:13
Code: 00 00 e8 5f d3 56 f8 65 48 8b 3c 25 40 70 02 00 e8 41 09 0e f8 eb 99 0f 1f 44 00 00 0f 0b e9 23 ff ff ff cc 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 dd 15 be
RSP: 0018:ffffc9001133eff0 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffffc9001133f0e0 RCX: ffffc900031bb000
RDX: 0000000000000001 RSI: ffffffff8a04a060 RDI: ffffffff8a04a0a0
RBP: 0000000000000015 R08: 0000000000000001 R09: 0000000000000006
R10: ffffffff8401f1e6 R11: 000000000000003f R12: ffff8880376326c0
R13: ffff8880376e6082 R14: 0000000000000000 R15: 0000000000000006
rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1169 [inline]
rcu_lockdep_current_cpu_online+0x2d/0x150 kernel/rcu/tree.c:1160
rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
rcu_read_lock_held_common kernel/rcu/update.c:102 [inline]
rcu_read_lock_held+0x21/0x40 kernel/rcu/update.c:309
xa_entry include/linux/xarray.h:1182 [inline]
xas_descend+0x2a5/0x3b0 lib/xarray.c:204
xas_load+0xe5/0x140 lib/xarray.c:240
xa_get_order+0xf7/0x390 lib/xarray.c:1761
__filemap_add_folio+0x364/0xe20 mm/filemap.c:916
filemap_add_folio+0xab/0x1d0 mm/filemap.c:999
__filemap_get_folio+0x3bc/0xe10 mm/filemap.c:1962
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: 0033:0x7f8741813e99
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:00007f8740189168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f8741926f60 RCX: 00007f8741813e99
RDX: 0000000000000000 RSI: 0000000000000013 RDI: 0000000000000005
RBP: 00007f874186dff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffde473276f R14: 00007f8740189300 R15: 0000000000022000
sched: RT throttling activated
----------------
Code disassembly (best guess):
0: 75 0a jne 0xc
2: f6 43 23 04 testb $0x4,0x23(%rbx)
6: 0f 84 97 00 00 00 je 0xa3
c: e8 fe 90 06 00 callq 0x6910f
11: 48 85 c0 test %rax,%rax
14: 48 89 c5 mov %rax,%rbp
17: 0f 84 86 00 00 00 je 0xa3
1d: 8b 53 14 mov 0x14(%rbx),%edx
20: 44 89 e6 mov %r12d,%esi
23: 48 89 c7 mov %rax,%rdi
26: 48 83 c2 08 add $0x8,%rdx
* 2a: e8 a0 a5 06 00 callq 0x6a5cf <-- trapping instruction
2f: 85 c0 test %eax,%eax
31: 74 72 je 0xa5
33: e8 a7 7c a5 ff callq 0xffa57cdf
38: 31 d2 xor %edx,%edx
3a: 45 31 c9 xor %r9d,%r9d
3d: 45 31 c0 xor %r8d,%r8d