rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P29511/1:b..l P30124/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=164045, q=58 ncpus=2)
task:syz-executor.1 state:R running task stack:27200 pid:30124 tgid:30124 ppid:5100 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7008
irqentry_exit+0x36/0x80 kernel/entry/common.c:432
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:650
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200
Code: b6 a1 da 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1e fa 65 48 8b 14 25 00 bd 03 00 65 8b 05 94 3c 7d 7e a9 00
RSP: 0000:ffffc9000368f988 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffc9000368fa40 RCX: ffffffff8a727646
RDX: ffff88801db4a100 RSI: 0000000000000002 RDI: 0000000000000007
RBP: 0000000000000007 R08: 0000000000000007 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888037694580
R13: ffffea0000e13540 R14: 0000000000000000 R15: 0000000000000001
xas_descend+0x141/0x4e0 lib/xarray.c:216
xas_load+0xe0/0x140 lib/xarray.c:244
filemap_get_entry+0x10f/0x460 mm/filemap.c:1806
shmem_get_folio_gfp+0x1bf/0x1360 mm/shmem.c:1964
shmem_fault+0x205/0xa90 mm/shmem.c:2213
__do_fault+0x107/0x600 mm/memory.c:4265
do_shared_fault mm/memory.c:4692 [inline]
do_fault mm/memory.c:4766 [inline]
do_pte_missing mm/memory.c:3730 [inline]
handle_pte_fault mm/memory.c:5038 [inline]
__handle_mm_fault+0x29a9/0x3d70 mm/memory.c:5179
handle_mm_fault+0x47a/0xa10 mm/memory.c:5344
do_user_addr_fault+0x30b/0x1000 arch/x86/mm/fault.c:1364
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x5d/0xc0 arch/x86/mm/fault.c:1561
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fee13827226
RSP: 002b:00007ffe99a00cb8 EFLAGS: 00010287
RAX: 0000001b31827000 RBX: 00007fee1399c0e8 RCX: 0000001b31820000
RDX: 0000001b31827004 RSI: 0000000080000000 RDI: 0000000088a7b93c
RBP: 0000000088a7b93c R08: 0000001b31c20000 R09: 000000000000193c
R10: 0000000088a7b940 R11: 0000000000000246 R12: 0000000000001e3c
R13: 0000000000000001 R14: 00007fee13990000 R15: ffffffff88a7bf8f
task:kworker/u4:4 state:R running task stack:27328 pid:29511 tgid:29511 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7008
irqentry_exit+0x36/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x1ef/0x520 kernel/locking/lockdep.c:5722
Code: c1 05 5d 77 9b 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900053f7ac8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000a7ef5b RCX: 00000000c8357ea6
RDX: 0000000000000001 RSI: ffffffff8accab60 RDI: ffffffff8b2ee500
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff23e1dd0
R10: ffffffff91f0ee87 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8cfa81e0 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
rcu_read_lock include/linux/rcupdate.h:747 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x16e/0x10e0 net/batman-adv/network-coding.c:719
process_one_work+0x886/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
rcu: rcu_preempt kthread starved for 10562 jiffies! g164045 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:28304 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_timeout+0x137/0x290 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1830
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
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: 30139 Comm: syz-executor.5 Not tainted 6.7.0-rc3-syzkaller-00048-ge8f60209d6cf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__sanitizer_cov_trace_pc+0x39/0x60 kernel/kcov.c:210
Code: 05 94 3c 7d 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 fc 15 00 00 85 c0 74 2b 8b 82 d8 15 00 00 83 f8 02 75 20 <48> 8b 8a e0 15 00 00 8b 92 dc 15 00 00 48 8b 01 48 83 c0 01 48 39
RSP: 0018:ffffc900038ef7a8 EFLAGS: 00000046
RAX: 0000000000000002 RBX: ffffc900038ef830 RCX: ffffc9000f1bd000
RDX: ffff888038a8c180 RSI: ffffffff813a0844 RDI: ffffc900038ef840
RBP: ffffc900038eff30 R08: 0000000000000004 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000001 R12: ffffc900038e8000
R13: ffffc900038f0000 R14: 0000000000000001 R15: 0000000000000001
FS: 00007f8888c646c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8888c63f00 CR3: 0000000017f1a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_stack arch/x86/include/asm/stacktrace.h:60 [inline]
unwind_next_frame+0x1204/0x2390 arch/x86/kernel/unwind_orc.c:665
arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x138/0x190 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
__cache_free mm/slab.c:3370 [inline]
__do_kmem_cache_free mm/slab.c:3557 [inline]
kmem_cache_free+0x104/0x390 mm/slab.c:3582
__sigqueue_free kernel/signal.c:460 [inline]
__sigqueue_free kernel/signal.c:452 [inline]
collect_signal+0x315/0x630 kernel/signal.c:603
__dequeue_signal kernel/signal.c:625 [inline]
dequeue_signal+0x22a/0x660 kernel/signal.c:645
get_signal+0x5d8/0x2790 kernel/signal.c:2784
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x121/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:88
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f8887e7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8888c640c8 EFLAGS: 00000246
RAX: 0000000000000005 RBX: 00007f8887f9c050 RCX: 00007f8887e7cae9
RDX: 0000000000000000 RSI: 00000000000060c2 RDI: 0000000020000100
RBP: 00007f8887ec847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f8887f9c050 R15: 00007ffee3a05e68