rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=4cdc/1/0x4000000000000000 softirq=48991/48991 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P13338/1:b..l
(detected by 0, t=10502 jiffies, g=75125, q=257 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4831 Comm: kworker/u4:15 Not tainted 6.1.129-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:find_held_lock kernel/locking/lockdep.c:5152 [inline]
RIP: 0010:__lock_release kernel/locking/lockdep.c:5337 [inline]
RIP: 0010:lock_release+0x25a/0xa20 kernel/locking/lockdep.c:5682
Code: 48 89 44 24 30 44 8d 68 ff 49 81 c6 e0 0a 00 00 49 63 dd 83 fb 31 0f 83 f5 05 00 00 48 8d 04 9b 4d 8d 24 c6 49 89 c6 4c 89 e7 <48> 8b 74 24 18 e8 ec 1a 46 09 44 89 6c 24 3c 44 89 ea 85 c0 0f 84
RSP: 0018:ffffc900001e0b80 EFLAGS: 00000087
RAX: 000000000000000f RBX: 0000000000000003 RCX: ffffc900001e0c03
RDX: ffff8880300e2898 RSI: ffffffff8b0c2a20 RDI: ffff8880300e2918
RBP: ffffc900001e0cb0 R08: dffffc0000000000 R09: fffffbfff1d413e6
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880300e2918
R13: 0000000000000003 R14: 000000000000000f R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000059a69000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_release include/linux/rcupdate.h:355 [inline]
rcu_read_unlock include/linux/rcupdate.h:824 [inline]
advance_sched+0x800/0x970 net/sched/sch_taprio.c:755
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666
Code: 2b 00 74 08 4c 89 f7 e8 9f 49 77 00 f6 44 24 61 02 0f 85 84 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:ffffc900036979e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920006d2f48 RCX: ffffffff816b6102
RDX: dffffc0000000000 RSI: ffffffff8b0c2ec0 RDI: ffffffff8b5f6d80
RBP: ffffc90003697b30 R08: dffffc0000000000 R09: fffffbfff2256c67
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920006d2f44
R13: dffffc0000000000 R14: ffffc90003697a40 R15: 0000000000000246
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
batadv_nc_purge_paths+0xe8/0x3b0 net/batman-adv/network-coding.c:442
batadv_nc_worker+0x361/0x610 net/batman-adv/network-coding.c:722
process_one_work+0x917/0x1260 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
task:syz.6.1923 state:R running task stack:21576 pid:13338 ppid:4595 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5243 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6560
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6729
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6753
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x3c/0x40 kernel/locking/spinlock.c:202
spin_unlock_irq include/linux/spinlock.h:401 [inline]
loop_queue_work drivers/block/loop.c:893 [inline]
loop_queue_rq+0xa02/0xaf0 drivers/block/loop.c:1873
__blk_mq_issue_directly block/blk-mq.c:2631 [inline]
__blk_mq_try_issue_directly+0x4da/0x830 block/blk-mq.c:2684
blk_mq_try_issue_directly+0x28/0x1f0 block/blk-mq.c:2708
blk_mq_submit_bio+0x130e/0x2190 block/blk-mq.c:3045
__submit_bio+0x261/0x2f0 block/blk-core.c:591
__submit_bio_noacct_mq block/blk-core.c:668 [inline]
submit_bio_noacct_nocheck+0x976/0xd10 block/blk-core.c:697
submit_bh fs/buffer.c:2707 [inline]
__bh_read_batch+0x27b/0x2b0 fs/buffer.c:3016
bh_readahead_batch include/linux/buffer_head.h:446 [inline]
do_readahead fs/jbd2/recovery.c:103 [inline]
jread+0x5bd/0xb90 fs/jbd2/recovery.c:163
do_one_pass+0x417/0x3100 fs/jbd2/recovery.c:531
jbd2_journal_skip_recovery+0x92/0x200 fs/jbd2/recovery.c:366
jbd2_journal_wipe+0x432/0x5e0 fs/jbd2/journal.c:2548
ocfs2_journal_wipe+0xa7/0x290 fs/ocfs2/journal.c:1159
ocfs2_check_volume fs/ocfs2/super.c:2415 [inline]
ocfs2_mount_volume+0xad4/0x1850 fs/ocfs2/super.c:1819
ocfs2_fill_super+0x4974/0x5a60 fs/ocfs2/super.c:1082
mount_bdev+0x2c9/0x3f0 fs/super.c:1443
legacy_get_tree+0xeb/0x180 fs/fs_context.c:632
vfs_get_tree+0x88/0x270 fs/super.c:1573
do_new_mount+0x2ba/0xb40 fs/namespace.c:3056
do_mount fs/namespace.c:3399 [inline]
__do_sys_mount fs/namespace.c:3607 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3584
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f949fd8e90a
RSP: 002b:00007f94a0b98e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f94a0b98ef0 RCX: 00007f949fd8e90a
RDX: 0000400000000040 RSI: 00004000000044c0 RDI: 00007f94a0b98eb0
RBP: 0000400000000040 R08: 00007f94a0b98ef0 R09: 0000000000800401
R10: 0000000000800401 R11: 0000000000000246 R12: 00004000000044c0
R13: 00007f94a0b98eb0 R14: 0000000000004472 R15: 0000400000000140
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g75125 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=31963
rcu: rcu_preempt kthread starved for 10502 jiffies! g75125 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26712 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5243 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6560
schedule+0xbf/0x180 kernel/sched/core.c:6636
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
kthread+0x28d/0x320 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4831 Comm: kworker/u4:15 Not tainted 6.1.129-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:543 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
RIP: 0010:do_raw_spin_lock+0x16a/0x370 kernel/locking/spinlock_debug.c:115
Code: be 04 00 00 00 e8 d6 ec 75 00 41 0f b6 44 1d 00 84 c0 48 89 da 0f 85 89 01 00 00 8b 44 24 60 b9 01 00 00 00 f0 41 0f b1 0c 24 <0f> 85 db 00 00 00 65 8b 1d 99 15 96 7e 41 0f b6 04 17 84 c0 0f 85
RSP: 0018:ffffc900001e0be0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc900001e0c40
RBP: ffffc900001e0cb0 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8880b8f2a4c0
R13: 1ffff9200003c188 R14: ffffc900001e0c40 R15: 1ffff110171e5499
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000059a69000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:120 [inline]
_raw_spin_lock_irq+0xdb/0x110 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1693 [inline]
__hrtimer_run_queues+0x6d3/0xe50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666
Code: 2b 00 74 08 4c 89 f7 e8 9f 49 77 00 f6 44 24 61 02 0f 85 84 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:ffffc900036979e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920006d2f48 RCX: ffffffff816b6102
RDX: dffffc0000000000 RSI: ffffffff8b0c2ec0 RDI: ffffffff8b5f6d80
RBP: ffffc90003697b30 R08: dffffc0000000000 R09: fffffbfff2256c67
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920006d2f44
R13: dffffc0000000000 R14: ffffc90003697a40 R15: 0000000000000246
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
batadv_nc_purge_paths+0xe8/0x3b0 net/batman-adv/network-coding.c:442
batadv_nc_worker+0x361/0x610 net/batman-adv/network-coding.c:722
process_one_work+0x917/0x1260 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
vkms_vblank_simulate: vblank timer overrun