rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5085/1:b..l P10/1:b..l P5796/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=16177, q=709 ncpus=2)
task:syz-executor.4 state:R running task stack:25120 pid:5796 tgid:5794 ppid:5096 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xee2/0x59a0 kernel/sched/core.c:6688
preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7008
irqentry_exit+0x35/0x80 kernel/entry/common.c:432
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:650
RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5721
Code: c1 05 7d 8e 9a 7e 83 f8 01 0f 85 b0 02 00 00 9c 58 f6 c4 02 0f 85 9b 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:ffffc90004e56d10 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920009cada4 RCX: 0000000000000001
RDX: 1ffff11007dee181 RSI: ffffffff8aacb060 RDI: ffffffff8b0e4b40
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff239b7d8
R10: ffffffff91cdbec7 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8cda98a0 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
rcu_read_lock include/linux/rcupdate.h:747 [inline]
filemap_get_entry+0xdb/0x460 mm/filemap.c:1821
shmem_get_folio_gfp+0x213/0x1890 mm/shmem.c:1954
shmem_fault+0x1db/0xb50 mm/shmem.c:2227
__do_fault+0x107/0x600 mm/memory.c:4207
do_read_fault mm/memory.c:4571 [inline]
do_fault mm/memory.c:4708 [inline]
do_pte_missing mm/memory.c:3672 [inline]
handle_pte_fault mm/memory.c:4981 [inline]
__handle_mm_fault+0x299e/0x3e10 mm/memory.c:5122
handle_mm_fault+0x478/0xa00 mm/memory.c:5287
faultin_page mm/gup.c:956 [inline]
__get_user_pages+0x4b2/0x1480 mm/gup.c:1239
__get_user_pages_locked mm/gup.c:1504 [inline]
get_dump_page+0x100/0x210 mm/gup.c:2018
dump_user_range+0x45b/0x790 fs/coredump.c:913
elf_core_dump+0x2700/0x3900 fs/binfmt_elf.c:2077
do_coredump+0x2c97/0x3fc0 fs/coredump.c:764
get_signal+0x2434/0x2790 kernel/signal.c:2901
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+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:88
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fc229e7cae9
RSP: 002b:00007fc22ac730c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffe5 RBX: 00007fc229f9bf80 RCX: 00007fc229e7cae9
RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00007fc229ec847a R08: 0000000000000000 R09: 0000000000000000
R10: 000004010040bffd R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fc229f9bf80 R15: 00007ffd89502298
task:kworker/u4:0 state:R running task stack:26480 pid:10 tgid:10 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xee2/0x59a0 kernel/sched/core.c:6688
preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7008
irqentry_exit+0x35/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5721
Code: c1 05 7d 8e 9a 7e 83 f8 01 0f 85 b0 02 00 00 9c 58 f6 c4 02 0f 85 9b 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:ffffc9000030fac8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000061f5b RCX: 0000000000000001
RDX: 1ffff110032cc959 RSI: ffffffff8aacb060 RDI: ffffffff8b0e4b40
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff239b7d8
R10: ffffffff91cdbec7 R11: 1ffffffff19b6989 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8cda98a0 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+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 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
task:syz-executor.1 state:R running task stack:23904 pid:5085 tgid:5085 ppid:5073 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xee2/0x59a0 kernel/sched/core.c:6688
preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6865
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
unwind_next_frame+0x1c80/0x2390 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
save_stack+0x160/0x1f0 mm/page_owner.c:128
__reset_page_owner+0x5a/0x190 mm/page_owner.c:149
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1136 [inline]
free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
free_unref_page_list+0xe6/0xb30 mm/page_alloc.c:2451
release_pages+0x32a/0x14e0 mm/swap.c:1042
__folio_batch_release+0x77/0xe0 mm/swap.c:1062
folio_batch_release include/linux/pagevec.h:83 [inline]
truncate_inode_pages_range+0xe33/0x1030 mm/truncate.c:428
ext4_evict_inode+0x2c5/0x1a30 fs/ext4/inode.c:193
evict+0x2ed/0x6b0 fs/inode.c:664
iput_final fs/inode.c:1775 [inline]
iput.part.0+0x55e/0x7a0 fs/inode.c:1801
iput+0x5c/0x80 fs/inode.c:1791
do_unlinkat+0x60f/0x740 fs/namei.c:4389
__do_sys_unlink fs/namei.c:4430 [inline]
__se_sys_unlink fs/namei.c:4428 [inline]
__x64_sys_unlink+0xc8/0x110 fs/namei.c:4428
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f2a2667c297
RSP: 002b:00007fff41748d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2a2667c297
RDX: 00007fff41748d30 RSI: 00007fff41748dc0 RDI: 00007fff41748dc0
RBP: 00007fff41748dc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff41749e80
R13: 00007f2a266c73b9 R14: 00007f2a266db330 R15: 0000000000000003
rcu: rcu_preempt kthread starved for 10613 jiffies! g16177 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:28560 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xee2/0x59a0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6778
schedule_timeout+0x157/0x2c0 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1626
rcu_gp_kthread+0x249/0x380 kernel/rcu/tree.c:1825
kthread+0x33c/0x440 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:
CPU: 0 PID: 5809 Comm: syz-executor.5 Not tainted 6.6.0-syzkaller-06824-g8bc9e6515183 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:finish_task_switch.isra.0+0x223/0xca0 kernel/sched/core.c:5250
Code: 0a 00 00 44 8b 0d 45 0f 9d 0d 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 cc f8 ff ff e8 47 bc 33 00 fb 65 48 8b 1c 25 00 bd 03 00 <48> 8d bb e8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc900037ef338 EFLAGS: 00000206
RAX: 0000000000a19453 RBX: ffff88803fd1c140 RCX: 1ffffffff1dee279
RDX: 0000000000000000 RSI: ffffffff8aacad60 RDI: ffffffff8b0e4b40
RBP: ffffc900037ef380 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8ef74657 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88802aa38080 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f1a9f4936c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020fa0030 CR3: 0000000074027000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
context_switch kernel/sched/core.c:5379 [inline]
__schedule+0xeea/0x59a0 kernel/sched/core.c:6688
preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7008
irqentry_exit+0x35/0x80 kernel/entry/common.c:432
asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:652
RIP: 0010:lock_is_held_type+0x104/0x140 kernel/locking/lockdep.c:5829
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 ef a5 87 75 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48
RSP: 0018:ffffc900037ef600 EFLAGS: 00000296
RAX: 0000000000000046 RBX: 1ffff920006fdec9 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8aacb060 RDI: ffffffff8b0e4b40
RBP: ffffffff8cda9840 R08: ffffffff892877a7 R09: 0000000000000000
R10: ffffc900037ef830 R11: 0000000000000000 R12: ffff88803fd1c140
R13: 0000000000000000 R14: 00000000ffffffff R15: 0000000000000000
lock_is_held include/linux/lockdep.h:288 [inline]
__might_resched+0x478/0x5e0 kernel/sched/core.c:10113
__mutex_lock_common kernel/locking/mutex.c:580 [inline]
__mutex_lock+0xee/0x1340 kernel/locking/mutex.c:747
__unix_dgram_recvmsg+0x267/0xee0 net/unix/af_unix.c:2382
unix_dgram_recvmsg+0xc3/0xf0 net/unix/af_unix.c:2487
sock_recvmsg_nosec net/socket.c:1044 [inline]
____sys_recvmsg+0x4ab/0x5c0 net/socket.c:2775
___sys_recvmsg+0x115/0x1a0 net/socket.c:2819
do_recvmmsg+0x2af/0x740 net/socket.c:2913
__sys_recvmmsg net/socket.c:2992 [inline]
__do_sys_recvmmsg net/socket.c:3015 [inline]
__se_sys_recvmmsg net/socket.c:3008 [inline]
__x64_sys_recvmmsg+0x235/0x290 net/socket.c:3008
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f1a9e67cae9
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:00007f1a9f4930c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f1a9e79c050 RCX: 00007f1a9e67cae9
RDX: 00000000040002db RSI: 0000000020000740 RDI: 0000000000000003
RBP: 00007f1a9e6c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f1a9e79c050 R15: 00007ffd382862f8