rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P3624/2:b..l P4743/1:b..l
(detected by 1, t=10502 jiffies, g=11397, q=42 ncpus=2)
task:syz.0.100 state:R running task stack:25728 pid:4743 ppid:4255 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lock_acquire+0x20f/0x490 kernel/locking/lockdep.c:5666
Code: 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 0f 85 f5 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 66 43 c7 44 3d 09 00 00 43 c6 44 3d 0b
RSP: 0018:ffffc90005e87320 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: f390125ea4c75f00
RDX: 0000000000000000 RSI: ffffffff8a6c1080 RDI: ffffffff8abf0ea0
RBP: ffffc90005e87438 R08: dffffc0000000000 R09: fffffbfff2116e49
R10: fffffbfff2116e49 R11: 1ffffffff2116e48 R12: 0000000000000001
R13: 1ffff92000bd0e70 R14: 0000000000000246 R15: dffffc0000000000
rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
rcu_read_lock include/linux/rcupdate.h:791 [inline]
percpu_ref_put_many include/linux/percpu-refcount.h:330 [inline]
percpu_ref_put+0x35/0x180 include/linux/percpu-refcount.h:351
css_put include/linux/cgroup.h:407 [inline]
obj_cgroup_charge_pages mm/memcontrol.c:3107 [inline]
__memcg_kmem_charge_page+0x260/0x380 mm/memcontrol.c:3127
__alloc_pages+0x215/0x4e0 mm/page_alloc.c:5623
__pte_alloc_one include/asm-generic/pgalloc.h:63 [inline]
pte_alloc_one+0x80/0x2f0 arch/x86/mm/pgtable.c:33
__pte_alloc+0x21/0x150 mm/memory.c:468
do_anonymous_page mm/memory.c:4159 [inline]
handle_pte_fault mm/memory.c:5029 [inline]
__handle_mm_fault mm/memory.c:5173 [inline]
handle_mm_fault+0x35cb/0x3e70 mm/memory.c:5294
do_user_addr_fault+0x51f/0xb10 arch/x86/mm/fault.c:1340
handle_page_fault arch/x86/mm/fault.c:1431 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1487
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0010:copy_user_short_string+0xa/0x40 arch/x86/lib/copy_user_64.S:232
Code: 83 f8 12 74 0a 89 d1 f3 a4 89 c8 0f 01 ca c3 89 d0 0f 01 ca c3 01 ca eb e7 90 90 90 90 90 90 90 89 d1 83 e2 07 c1 e9 03 74 12 <4c> 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10
RSP: 0018:ffffc90005e87a48 EFLAGS: 00050202
RAX: ffffffff84078301 RBX: 0000000000000038 RCX: 0000000000000007
RDX: 0000000000000000 RSI: 0000200000200000 RDI: ffffc90005e87ae0
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff52000bd0f63
R10: fffff52000bd0f63 R11: 1ffff92000bd0f5c R12: 00007fffffffefc8
R13: dffffc0000000000 R14: ffffc90005e87ae0 R15: 0000200000200000
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
_copy_from_user+0xf4/0x170 lib/usercopy.c:23
copy_from_user include/linux/uaccess.h:161 [inline]
copy_msghdr_from_user net/socket.c:2449 [inline]
recvmsg_copy_msghdr net/socket.c:2704 [inline]
___sys_recvmsg+0x12b/0x510 net/socket.c:2776
do_recvmmsg+0x359/0x7d0 net/socket.c:2874
__sys_recvmmsg net/socket.c:2953 [inline]
__do_sys_recvmmsg net/socket.c:2976 [inline]
__se_sys_recvmmsg net/socket.c:2969 [inline]
__x64_sys_recvmmsg+0x18d/0x240 net/socket.c:2969
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9cb258e969
RSP: 002b:00007f9cb3488038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f9cb27b6080 RCX: 00007f9cb258e969
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000004
RBP: 00007f9cb2610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f9cb27b6080 R15: 00007ffc4848c968
task:udevd state:R running task stack:23040 pid:3624 ppid:1 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:244 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x4/0x80 kernel/kcov.c:320
Code: 77 22 89 ff 89 f6 49 ff c0 4c 89 01 48 c7 44 11 08 05 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 90 48 8b 04 24 <65> 48 8b 0d b4 a7 81 7e 65 8b 15 b5 a7 81 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc900032c77c0 EFLAGS: 00000282
RAX: ffffffff81ad83b3 RBX: 0000000065766575 RCX: ffff88807bab1dc0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff1bfcf4e
R10: fffffbfff1bfcf4e R11: 1ffffffff1bfcf4d R12: 0000000000000002
R13: ffff8880253d2ff7 R14: ffff8880253d2ffb R15: ffff888075dd6abc
copy_from_kernel_nofault+0x153/0x310 mm/maccess.c:40
prepend_copy fs/d_path.c:49 [inline]
prepend fs/d_path.c:75 [inline]
prepend_name fs/d_path.c:100 [inline]
__prepend_path fs/d_path.c:132 [inline]
prepend_path+0x565/0xc20 fs/d_path.c:171
d_absolute_path+0x9e/0x140 fs/d_path.c:233
tomoyo_get_absolute_path security/tomoyo/realpath.c:101 [inline]
tomoyo_realpath_from_path+0x2d5/0x5d0 security/tomoyo/realpath.c:271
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x1fd/0x550 security/tomoyo/file.c:822
security_inode_getattr+0xcf/0x120 security/security.c:1361
vfs_getattr+0x26/0x3a0 fs/stat.c:158
vfs_statx+0x16e/0x650 fs/stat.c:233
vfs_fstatat fs/stat.c:267 [inline]
__do_sys_newfstatat fs/stat.c:437 [inline]
__se_sys_newfstatat fs/stat.c:431 [inline]
__x64_sys_newfstatat+0x155/0x1e0 fs/stat.c:431
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd5d11775f4
RSP: 002b:00007ffec3be33b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007fd5d124f460 RCX: 00007fd5d11775f4
RDX: 00007ffec3be33c0 RSI: 00007fd5d1214130 RDI: 000000000000000c
RBP: 000055c59fa0d260 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000001000 R11: 0000000000000206 R12: 0000000000000006
R13: 0000000000000006 R14: 000055c59fa0d260 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10570 jiffies! g11397 f0x0 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:27464 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:1905
kthread+0x29d/0x330 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:735
sched: RT throttling activated