rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5999/1:b..l P6680/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=21393, q=1381805 ncpus=2)
task:syz.1.318 state:R running task stack:22192 pid:6680 tgid:6675 ppid:5744 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6997
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:xa_entry include/linux/xarray.h:1220 [inline]
RIP: 0010:xas_find+0x425/0x960 lib/xarray.c:1283
Code: f5 4b 8d 6c f7 28 48 89 e8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 80 3c 30 00 74 08 48 89 ef e8 0f ca 3d f6 4c 8b 7d 00 86 8a 04 00 89 c5 31 ff 89 c6 e8 fb 1c d4 f5 85 ed 74 27 48 83
RSP: 0018:ffffc90003d67070 EFLAGS: 00000246
RAX: 1ffff110046f84f8 RBX: ffff88804a8cf1d0 RCX: 0000000000040000
RDX: ffffc90008e7a000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffff8880237c27c0 R08: ffffffff8bc0c2ad R09: ffffffff8bc0bfbb
R10: 0000000000000002 R11: ffff88802e8fda00 R12: 1ffff920007ace33
R13: ffffc90003d67198 R14: dffffc0000000000 R15: ffffea0001d7e340
find_get_entry mm/filemap.c:1992 [inline]
find_lock_entries+0x28b/0xef0 mm/filemap.c:2096
mapping_try_invalidate+0x3e7/0x4f0 mm/truncate.c:484
drop_pagecache_sb+0x1ab/0x260 fs/drop_caches.c:40
iterate_supers+0xc6/0x190 fs/super.c:934
drop_caches_sysctl_handler+0x8c/0x160 fs/drop_caches.c:64
proc_sys_call_handler+0x550/0x8b0 fs/proc/proc_sysctl.c:595
iter_file_splice_write+0xbfa/0x1510 fs/splice.c:743
do_splice_from fs/splice.c:941 [inline]
direct_splice_actor+0x11b/0x220 fs/splice.c:1164
splice_direct_to_actor+0x586/0xc80 fs/splice.c:1108
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x289/0x3e0 fs/splice.c:1233
do_sendfile+0x561/0xe10 fs/read_write.c:1388
__do_sys_sendfile64 fs/read_write.c:1449 [inline]
__se_sys_sendfile64+0x100/0x1e0 fs/read_write.c:1441
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f590357dff9
RSP: 002b:00007f59043d8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f5903736130 RCX: 00007f590357dff9
RDX: 00000000200000c0 RSI: 0000000000000008 RDI: 000000000000000b
RBP: 00007f59035f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5903736130 R15: 00007f590385fa28
task:syz-executor state:R running task stack:20992 pid:5999 tgid:5999 ppid:5976 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6997
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x658/0xa30 kernel/locking/lockdep.c:5850
Code: 3c 3b 00 74 08 4c 89 f7 e8 a5 1b 8e 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc90003b17060 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000762e1e RCX: ffffc90003b17003
RDX: 0000000000000002 RSI: ffffffff8c0adc40 RDI: ffffffff8c60f860
RBP: ffffc90003b17188 R08: ffffffff901ce62f R09: 1ffffffff2039cc5
R10: dffffc0000000000 R11: fffffbfff2039cc6 R12: 1ffff92000762e18
R13: 0000000000000246 R14: ffffc90003b170f0 R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
page_ext_put+0xa3/0xc0 mm/page_ext.c:550
__reset_page_owner+0x2de/0x430 mm/page_owner.c:300
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1108 [inline]
free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638
discard_slab mm/slub.c:2678 [inline]
__put_partials+0xeb/0x130 mm/slub.c:3146
put_cpu_partial+0x17c/0x250 mm/slub.c:3221
__slab_free+0x2ea/0x3d0 mm/slub.c:4450
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:247 [inline]
slab_post_alloc_hook mm/slub.c:4086 [inline]
slab_alloc_node mm/slub.c:4135 [inline]
__do_kmalloc_node mm/slub.c:4264 [inline]
__kmalloc_noprof+0x1a6/0x400 mm/slub.c:4277
kmalloc_noprof include/linux/slab.h:882 [inline]
kzalloc_noprof include/linux/slab.h:1014 [inline]
tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
tomoyo_encode+0x26f/0x540 security/tomoyo/realpath.c:80
tomoyo_realpath_from_path+0x59e/0x5e0 security/tomoyo/realpath.c:283
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x255/0x500 security/tomoyo/file.c:771
security_file_open+0x777/0x990 security/security.c:3107
do_dentry_open+0x369/0x1460 fs/open.c:945
vfs_open+0x3e/0x330 fs/open.c:1088
do_open fs/namei.c:3774 [inline]
path_openat+0x2c84/0x3590 fs/namei.c:3933
do_filp_open+0x235/0x490 fs/namei.c:3960
do_sys_openat2+0x13e/0x1d0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_openat fs/open.c:1446 [inline]
__se_sys_openat fs/open.c:1441 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1441
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1583b7d8f1
RSP: 002b:00007f1583e5ec60 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f1583bf0134 RCX: 00007f1583b7d8f1
RDX: 0000000000090800 RSI: 00007f1583e5fe00 RDI: 00000000ffffff9c
RBP: 00007f1583e5fdec R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000287 R12: 00007f1583e5fe00
R13: 00007f1583bf0134 R14: 0000000000022e7f R15: 00007f1583e5fe40
rcu: rcu_preempt kthread starved for 6668 jiffies! g21393 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:23280 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.11.0-syzkaller-12113-ge7ed34365879 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 d7 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 05 53 a5 00 f3 0f 1e fa fb f4 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffffff8e607ca8 EFLAGS: 00000246
RAX: ffffffff8e694640 RBX: ffff88801e2e6864 RCX: 00000000001b4071
RDX: 0000000000000001 RSI: ffff88801e2e6800 RDI: ffff88801e2e6864
RBP: 000000000003a9b8 R08: ffff8880b8637e9b R09: 1ffff110170c6fd3
R10: dffffc0000000000 R11: ffffffff8bc578f0 R12: ffff8881476e4000
R13: 0000000000000001 R14: 0000000000000001 R15: ffffffff8f12cd00
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8f8d75eb30 CR3: 00000000866f6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702
cpuidle_enter_state+0x109/0x470 drivers/cpuidle/cpuidle.c:264
cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:385
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x375/0x5d0 kernel/sched/idle.c:326
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
rest_init+0x2dc/0x300 init/main.c:747
start_kernel+0x47f/0x500 init/main.c:1105
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147