rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=1d8c/1/0x4000000000000000 softirq=103226/103226 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P23470/1:b..l
rcu: (detected by 0, t=10506 jiffies, g=152093, q=32 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1847 Comm: syz-executor.0 Not tainted 6.3.0-rc6-syzkaller-00016-g0d3eb744aed4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4730 [inline]
RIP: 0010:__lock_acquire+0x49d/0x1f80 kernel/locking/lockdep.c:5006
Code: 12 00 00 44 89 33 44 89 fb 48 89 d8 48 c1 e8 06 48 8d 3c c5 c0 b1 2d 90 be 08 00 00 00 e8 9b 0e 76 00 48 0f a3 1d 03 95 c3 0e <73> 25 48 8d 04 5b 48 c1 e0 06 48 8d 98 c0 10 fd 8f 48 ba 00 00 00
RSP: 0018:ffffc900001e0a00 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff816a1cb5
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff902db1c0
RBP: ffff8880227f8a1c R08: dffffc0000000000 R09: fffffbfff205b639
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880227f8a30
R13: ffff8880227f8000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f291dc93700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020020000 CR3: 0000000051470000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
debug_object_deactivate+0x65/0x420 lib/debugobjects.c:739
debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline]
debug_deactivate+0x1b/0x1f0 kernel/time/hrtimer.c:481
__run_hrtimer kernel/time/hrtimer.c:1653 [inline]
__hrtimer_run_queues+0x321/0xd10 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
__sysvec_apic_timer_interrupt+0x13f/0x480 arch/x86/kernel/apic/apic.c:1113
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1107
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:52 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:193 [inline]
RIP: 0010:unwind_next_frame+0x4ab/0x2180 arch/x86/kernel/unwind_orc.c:467
Code: 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 48 63 03 48 01 d8 48 8d 4b 04 4c 39 f8 4c 0f 46 e9 <48> 8d 43 fc 48 0f 47 e8 4c 0f 46 e3 49 39 ed 76 a8 e9 ae fd ff ff
RSP: 0018:ffffc90004a87090 EFLAGS: 00000297
RAX: ffffffff81ef3da8 RBX: ffffffff8e6a4744 RCX: ffffffff8e6a4748
RDX: ffffffff8ed9c768 RSI: ffffffff81ef3f40 RDI: ffffffff813cac27
RBP: ffffffff8e6a4744 R08: 0000000000000001 R09: ffffc90004a87250
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8e6a4744
R13: ffffffff8e6a4748 R14: ffffffff8e6a4744 R15: ffffffff81ef3f3f
arch_stack_walk+0x111/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769
slab_alloc_node mm/slub.c:3452 [inline]
slab_alloc mm/slub.c:3460 [inline]
__kmem_cache_alloc_lru mm/slub.c:3467 [inline]
kmem_cache_alloc+0x11f/0x2e0 mm/slub.c:3476
kmem_cache_zalloc include/linux/slab.h:710 [inline]
alloc_buffer_head+0x2d/0x2a0 fs/buffer.c:2947
alloc_page_buffers+0x32d/0x950 fs/buffer.c:872
create_empty_buffers+0x3e/0x7e0 fs/buffer.c:1586
ext4_block_write_begin+0x350/0x1400 fs/ext4/inode.c:1079
ext4_da_write_begin+0x5a6/0x960 fs/ext4/inode.c:3081
generic_perform_write+0x300/0x5e0 mm/filemap.c:3926
ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:289
ext4_file_write_iter+0x1d6/0x1930
call_write_iter include/linux/fs.h:1851 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x7b2/0xbb0 fs/read_write.c:584
ksys_write+0x1a0/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f291ce8c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f291dc93168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f291cfabf80 RCX: 00007f291ce8c169
RDX: 000000000208e24b RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00007f291cee7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdc7bbfe0f R14: 00007f291dc93300 R15: 0000000000022000
task:kworker/u4:5 state:R running task stack:21272 pid:23470 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
preempt_schedule_irq+0xfb/0x1b0 kernel/sched/core.c:6937
irqentry_exit+0x57/0x80 kernel/entry/common.c:433
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:650
RIP: 0010:lock_acquire+0x258/0x520 kernel/locking/lockdep.c:5673
Code: 2b 00 74 08 4c 89 f7 e8 96 15 76 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:ffffc900169d7a80 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92002d3af5c RCX: 1ffff92002d3aefc
RDX: dffffc0000000000 RSI: ffffffff8aea8f20 RDI: ffffffff8b37fec0
RBP: ffffc900169d7bd8 R08: dffffc0000000000 R09: fffffbfff205b639
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92002d3af58
R13: dffffc0000000000 R14: ffffc900169d7ae0 R15: 0000000000000246
rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:327
rcu_read_lock include/linux/rcupdate.h:773 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xc5/0x5c0 net/batman-adv/network-coding.c:719
process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390
worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g152093 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=185683
rcu: rcu_preempt kthread starved for 10506 jiffies! g152093 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:26552 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
schedule_timeout+0x1bd/0x310 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x2c6/0x1010 kernel/rcu/tree.c:1608
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1807
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
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: 1847 Comm: syz-executor.0 Not tainted 6.3.0-rc6-syzkaller-00016-g0d3eb744aed4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:122 [inline]
RIP: 0010:lock_acquire+0x1ad/0x520 kernel/locking/lockdep.c:5670
Code: 08 4c 89 ff e8 44 16 76 00 48 8d 5c 24 60 4c 8b bc 24 80 00 00 00 fa 48 c7 c7 80 8a ea 8a e8 7a 52 34 09 65 ff 05 4b 75 98 7e <45> 31 c9 41 f7 c7 00 02 00 00 41 0f 94 c1 48 8b 7c 24 20 44 89 f6
RSP: 0018:ffffc900001e0ae0 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffffc900001e0b40 RCX: ffffffff816a1294
RDX: 0000000000000000 RSI: ffffffff8aea8a80 RDI: ffffffff8b37fec0
RBP: ffffc900001e0c28 R08: dffffc0000000000 R09: fffffbfff1ca68e6
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200003c164
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000046
FS: 00007f291dc93700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020020000 CR3: 0000000051470000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
debug_object_deactivate+0x65/0x420 lib/debugobjects.c:739
debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline]
debug_deactivate+0x1b/0x1f0 kernel/time/hrtimer.c:481
__run_hrtimer kernel/time/hrtimer.c:1653 [inline]
__hrtimer_run_queues+0x321/0xd10 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
__sysvec_apic_timer_interrupt+0x13f/0x480 arch/x86/kernel/apic/apic.c:1113
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1107
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:52 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:193 [inline]
RIP: 0010:unwind_next_frame+0x4ab/0x2180 arch/x86/kernel/unwind_orc.c:467
Code: 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 48 63 03 48 01 d8 48 8d 4b 04 4c 39 f8 4c 0f 46 e9 <48> 8d 43 fc 48 0f 47 e8 4c 0f 46 e3 49 39 ed 76 a8 e9 ae fd ff ff
RSP: 0018:ffffc90004a87090 EFLAGS: 00000297
RAX: ffffffff81ef3da8 RBX: ffffffff8e6a4744 RCX: ffffffff8e6a4748
RDX: ffffffff8ed9c768 RSI: ffffffff81ef3f40 RDI: ffffffff813cac27
RBP: ffffffff8e6a4744 R08: 0000000000000001 R09: ffffc90004a87250
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8e6a4744
R13: ffffffff8e6a4748 R14: ffffffff8e6a4744 R15: ffffffff81ef3f3f
arch_stack_walk+0x111/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769
slab_alloc_node mm/slub.c:3452 [inline]
slab_alloc mm/slub.c:3460 [inline]
__kmem_cache_alloc_lru mm/slub.c:3467 [inline]
kmem_cache_alloc+0x11f/0x2e0 mm/slub.c:3476
kmem_cache_zalloc include/linux/slab.h:710 [inline]
alloc_buffer_head+0x2d/0x2a0 fs/buffer.c:2947
alloc_page_buffers+0x32d/0x950 fs/buffer.c:872
create_empty_buffers+0x3e/0x7e0 fs/buffer.c:1586
ext4_block_write_begin+0x350/0x1400 fs/ext4/inode.c:1079
ext4_da_write_begin+0x5a6/0x960 fs/ext4/inode.c:3081
generic_perform_write+0x300/0x5e0 mm/filemap.c:3926
ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:289
ext4_file_write_iter+0x1d6/0x1930
call_write_iter include/linux/fs.h:1851 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x7b2/0xbb0 fs/read_write.c:584
ksys_write+0x1a0/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f291ce8c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f291dc93168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f291cfabf80 RCX: 00007f291ce8c169
RDX: 000000000208e24b RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00007f291cee7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdc7bbfe0f R14: 00007f291dc93300 R15: 0000000000022000