rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10563/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=52837, q=517 ncpus=2)
task:syz-executor.0 state:R running task stack:24928 pid:10563 tgid:10562 ppid:9654 flags:0x00004006
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:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:384 [inline]
RIP: 0010:__rcu_read_unlock+0x34/0x110 kernel/rcu/tree_plugin.h:423
Code: 55 41 54 53 49 bc 00 00 00 00 00 fc ff df 65 4c 8b 34 25 00 d5 03 00 4d 8d ae 44 04 00 00 4c 89 eb 48 c1 eb 03 42 0f b6 04 23 <84> c0 75 6b 41 8b 6d 00 ff cd 42 0f b6 04 23 84 c0 75 76 41 89 6d
RSP: 0018:ffffc90013667368 EFLAGS: 00000213
RAX: 0000000000000000 RBX: 1ffff110055e4bc8 RCX: ffffc90013667203
RDX: 0000000000000002 RSI: ffffffff8bcacce0 RDI: ffffffff8c1ff200
RBP: ffff88813fffa7b0 R08: ffffffff8fad4aef R09: 1ffffffff1f5a95d
R10: dffffc0000000000 R11: fffffbfff1f5a95e R12: dffffc0000000000
R13: ffff88802af25e44 R14: ffff88802af25a00 R15: 0000000000000000
page_table_check_alloc include/linux/page_table_check.h:33 [inline]
post_alloc_hook+0x206/0x230 mm/page_alloc.c:1469
prep_new_page mm/page_alloc.c:1476 [inline]
get_page_from_freelist+0x2e43/0x2f00 mm/page_alloc.c:3420
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4678
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
shmem_alloc_folio mm/shmem.c:1628 [inline]
shmem_alloc_and_add_folio+0x24d/0xdb0 mm/shmem.c:1668
shmem_get_folio_gfp+0x82d/0x1f50 mm/shmem.c:2055
shmem_get_folio mm/shmem.c:2160 [inline]
shmem_write_begin+0x170/0x4d0 mm/shmem.c:2743
generic_perform_write+0x324/0x640 mm/filemap.c:4015
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2919
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa74/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
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: 0033:0x7f2aeba7bbef
RSP: 002b:00007f2aec8b6e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000013bd7ef RCX: 00007f2aeba7bbef
RDX: 00000000013bd7ef RSI: 00007f2ae1800000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000005509
R10: 00000000000003c8 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f2aec8b6f80 R14: 00007f2aec8b6f40 R15: 00007f2ae1800000
rcu: rcu_preempt kthread starved for 10531 jiffies! g52837 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:26576 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:
CPU: 0 PID: 10600 Comm: syz-executor.4 Not tainted 6.10.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x35/0x90 kernel/kcov.c:304
Code: 14 25 00 d5 03 00 65 8b 05 b0 a9 6d 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 5b 83 ba 1c 16 00 00 00 74 52 8b 82 f8 15 00 00 <83> f8 03 75 47 48 8b 8a 00 16 00 00 44 8b 8a fc 15 00 00 49 c1 e1
RSP: 0018:ffffc9001362fa10 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffff8880215f9e00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 1ffff920026c5f62 R08: ffffffff8188bd54 R09: fffff520026c5f38
R10: dffffc0000000000 R11: fffff520026c5f38 R12: ffffc90000a45a20
R13: dffffc0000000000 R14: ffffc9001362fb10 R15: ffffc9001362fae0
FS: 00007fe30d63a6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffecb3c1ec0 CR3: 000000001174a000 CR4: 0000000000350ef0
Call Trace:
__futex_unqueue+0xb4/0x160 kernel/futex/core.c:518
futex_unqueue+0x92/0xf0 kernel/futex/core.c:618
__futex_wait+0x187/0x320 kernel/futex/waitwake.c:672
futex_wait+0x101/0x360 kernel/futex/waitwake.c:697
do_futex+0x33b/0x560 kernel/futex/syscalls.c:102
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex+0x3f9/0x480 kernel/futex/syscalls.c:160
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: 0033:0x7fe30c87cea9
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:00007fe30d63a178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fe30c9b3f88 RCX: 00007fe30c87cea9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe30c9b3f88
RBP: 00007fe30c9b3f80 R08: 00007fe30d63a6c0 R09: 00007fe30d63a6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe30c9b3f8c
R13: 000000000000000b R14: 00007ffecb3c1f80 R15: 00007ffecb3c2068