rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2819/1:b..l P5219/1:b..l P4544/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=9061, q=529 ncpus=2)
task:udevd state:R running task stack:24432 pid:4544 tgid:4544 ppid:1 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
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_acquire+0x264/0x550 kernel/locking/lockdep.c:5758
Code: 2b 00 74 08 4c 89 f7 e8 0a 81 89 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9000962f7c0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920012c5f04 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcaccc0 RDI: ffffffff8c1ff100
RBP: ffffc9000962f918 R08: ffffffff92fa8587 R09: 1ffffffff25f50b0
R10: dffffc0000000000 R11: fffffbfff25f50b1 R12: 1ffff920012c5f00
R13: dffffc0000000000 R14: ffffc9000962f820 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock include/linux/rcupdate.h:781 [inline]
dput+0x54/0x2b0 fs/dcache.c:838
path_put fs/namei.c:561 [inline]
terminate_walk+0x189/0x430 fs/namei.c:685
path_lookupat+0x328/0x450 fs/namei.c:2510
filename_lookup+0x256/0x610 fs/namei.c:2522
vfs_statx+0x105/0x4e0 fs/stat.c:244
vfs_fstatat+0x135/0x190 fs/stat.c:304
__do_sys_newfstatat fs/stat.c:468 [inline]
__se_sys_newfstatat fs/stat.c:462 [inline]
__x64_sys_newfstatat+0x125/0x1b0 fs/stat.c:462
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: 0033:0x7fe3879165f4
RSP: 002b:00007fff9c70c268 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 000055bda84529e0 RCX: 00007fe3879165f4
RDX: 00007fff9c70c278 RSI: 00007fff9c70c708 RDI: 00000000ffffff9c
RBP: 00007fff9c70c308 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff9c70c708
R13: 00007fff9c70c278 R14: 000055bda843f910 R15: 0000000000000000
task:syz.5.10 state:R running task stack:23928 pid:5219 tgid:5217 ppid:5093 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x44/0x50 kernel/locking/spinlock.c:202
spin_unlock_irq include/linux/spinlock.h:401 [inline]
loop_queue_work drivers/block/loop.c:906 [inline]
loop_queue_rq+0xa01/0xaf0 drivers/block/loop.c:1897
__blk_mq_issue_directly block/blk-mq.c:2577 [inline]
blk_mq_request_issue_directly+0x3dc/0x720 block/blk-mq.c:2662
blk_mq_plug_issue_direct+0x22a/0x5c0 block/blk-mq.c:2683
blk_mq_flush_plug_list+0x842/0x1880 block/blk-mq.c:2792
__blk_flush_plug+0x420/0x500 block/blk-core.c:1194
blk_finish_plug block/blk-core.c:1221 [inline]
__submit_bio+0x422/0x560 block/blk-core.c:635
__submit_bio_noacct_mq block/blk-core.c:708 [inline]
submit_bio_noacct_nocheck+0x4d3/0xe30 block/blk-core.c:737
submit_bh fs/buffer.c:2832 [inline]
__bread_slow fs/buffer.c:1276 [inline]
__bread_gfp+0x23c/0x400 fs/buffer.c:1500
sb_bread_unmovable include/linux/buffer_head.h:353 [inline]
ntfs_bread fs/ntfs3/fsntfs.c:1025 [inline]
ntfs_read_run_nb+0x59d/0xf70 fs/ntfs3/fsntfs.c:1245
ntfs_read_bh+0x40/0x780 fs/ntfs3/fsntfs.c:1313
mi_read+0x1ed/0x5a0 fs/ntfs3/record.c:133
ntfs_read_mft fs/ntfs3/inode.c:70 [inline]
ntfs_iget5+0x49a/0x3b10 fs/ntfs3/inode.c:539
ntfs_fill_super+0x2b31/0x4a20 fs/ntfs3/super.c:1260
get_tree_bdev+0x3f9/0x570 fs/super.c:1624
vfs_get_tree+0x92/0x2a0 fs/super.c:1789
do_new_mount+0x2be/0xb40 fs/namespace.c:3352
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875
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: 0033:0x7fe62db772da
RSP: 002b:00007fe62e9a3e78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe62e9a3f00 RCX: 00007fe62db772da
RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fe62e9a3ec0
RBP: 0000000020000040 R08: 00007fe62e9a3f00 R09: 0000000000000600
R10: 0000000000000600 R11: 0000000000000202 R12: 0000000020000080
R13: 00007fe62e9a3ec0 R14: 000000000001f75c R15: 0000000020000440
task:kworker/u8:9 state:R running task stack:24624 pid:2819 tgid:2819 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
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:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:206
Code: 8b 3d ac 9a 45 0c 48 89 de 5b e9 93 4a 5a 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 c0 d4 03 00 65 8b 15 90 ac 6d 7e f7 c2 00 01 ff 00
RSP: 0018:ffffc90009c1f3d8 EFLAGS: 00000246
RAX: ffffffff813360af RBX: ffffc90009c1f418 RCX: ffffc90009c1f4a0
RDX: ffffc90009c1f480 RSI: ffff88802bb81e00 RDI: ffffc90009c1f418
RBP: dffffc0000000000 R08: ffffc90009c1f4df R09: ffffc90009c1f480
R10: dffffc0000000000 R11: fffff52001383e9c R12: ffffc90009c1f4a0
R13: ffff88802bb81e00 R14: ffffc90009c1f4a0 R15: ffffc90009c1f480
get_stack_info+0x1f/0x180 arch/x86/kernel/dumpstack_64.c:193
__unwind_start+0x481/0x7c0 arch/x86/kernel/unwind_orc.c:729
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0x103/0x1b0 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
kmalloc_trace_noprof+0x19c/0x2c0 mm/slub.c:4154
kmalloc_noprof include/linux/slab.h:660 [inline]
batadv_forw_packet_alloc+0x19c/0x3b0 net/batman-adv/send.c:519
batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:562 [inline]
batadv_iv_ogm_queue_add+0x6da/0xbf0 net/batman-adv/bat_iv_ogm.c:670
batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:849 [inline]
batadv_iv_ogm_schedule+0xc4d/0x1090 net/batman-adv/bat_iv_ogm.c:868
batadv_iv_send_outstanding_bat_ogm_packet+0x6fe/0x810 net/batman-adv/bat_iv_ogm.c:1712
process_one_work kernel/workqueue.c:3248 [inline]
process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3329
worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10526 jiffies! g9061 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:25328 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111