rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5125/1:b..l P10926/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=43009, q=329 ncpus=2)
task:syz-executor.0 state:R running task stack:25616 pid:10926 tgid:10924 ppid:7212 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5249 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6594
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6916
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:check_kcov_mode kernel/kcov.c:175 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:207
Code: 24 65 48 8b 0c 25 00 d6 03 00 65 8b 15 20 5b 70 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 1c 16 00 00 00 74 2c <8b> 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48
RSP: 0018:ffffc90004adf2e0 EFLAGS: 00000246
RAX: ffffffff8205b82d RBX: ffff888018004d30 RCX: ffff8880291e5a00
RDX: 0000000080000000 RSI: 000000000003ffff RDI: ffff888018004d30
RBP: 0000000000000000 R08: ffffffff8205bd65 R09: 1ffff110030009a5
R10: dffffc0000000000 R11: ffffed10030009a6 R12: 0000000000000001
R13: 0000000000000001 R14: ffffea0001603d80 R15: 0000000000000000
page_ext_put+0xd/0xc0 mm/page_ext.c:556
page_table_check_alloc include/linux/page_table_check.h:33 [inline]
post_alloc_hook+0x206/0x230 mm/page_alloc.c:1501
prep_new_page mm/page_alloc.c:1508 [inline]
get_page_from_freelist+0x2ccb/0x2d80 mm/page_alloc.c:3487
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4745
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2263
folio_alloc_mpol_noprof+0x36/0x50 mm/mempolicy.c:2281
shmem_alloc_folio mm/shmem.c:1722 [inline]
shmem_alloc_and_add_folio+0x2ce/0x14e0 mm/shmem.c:1782
shmem_get_folio_gfp+0xa22/0x2660 mm/shmem.c:2188
shmem_get_folio mm/shmem.c:2293 [inline]
shmem_write_begin+0x170/0x4d0 mm/shmem.c:2898
generic_perform_write+0x322/0x640 mm/filemap.c:4016
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:3074
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 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: 0033:0x7f3b8807bdef
RSP: 002b:00007f3b88ea3e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f3b8807bdef
RDX: 0000000001000000 RSI: 00007f3b7de00000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000967e
R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f3b88ea3f80 R14: 00007f3b88ea3f40 R15: 00007f3b7de00000
task:syz-executor.1 state:R running task stack:18416 pid:5125 tgid:5125 ppid:5108 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5249 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6594
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6916
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:lock_release+0x630/0x9f0 kernel/locking/lockdep.c:5840
Code: 3c 3b 00 74 08 4c 89 f7 e8 dd 57 8a 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900037cfd80 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920006f9fc2 RCX: ffffc900037cfe03
RDX: 0000000000000000 RSI: ffffffff8bcada20 RDI: ffffffff8c206c80
RBP: ffffc900037cfec0 R08: ffffffff8faeddef R09: 1ffffffff1f5dbbd
R10: dffffc0000000000 R11: fffffbfff1f5dbbe R12: 1ffff920006f9fbc
R13: 0000000000000246 R14: ffffc900037cfe10 R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:343 [inline]
rcu_read_unlock include/linux/rcupdate.h:876 [inline]
__task_pid_nr_ns+0x37c/0x450 kernel/pid.c:514
task_tgid_vnr include/linux/pid.h:294 [inline]
__do_sys_getpid+0x1e/0x30 kernel/sys.c:969
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: 0033:0x7f486447a827
RSP: 002b:00007ffc874640c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007ffc87464230 RCX: 00007f486447a827
RDX: 00007ffc87464100 RSI: 00007ffc87464230 RDI: 0000000000000021
RBP: 0000000000000000 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000032
R13: 000000000006ab55 R14: 000000000006ab39 R15: 0000000000000001
rcu: rcu_preempt kthread starved for 10561 jiffies! g43009 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:24304 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5249 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6594
__schedule_loop kernel/sched/core.c:6671 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6686
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2020
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2222
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 10934 Comm: syz-executor.1 Not tainted 6.10.0-rc4-next-20240621-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5820
Code: 2b 00 74 08 4c 89 f7 e8 6a 82 8a 00 f6 44 24 61 02 0f 85 85 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:ffffc900091e78e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200123cf28 RCX: b9829ed8332bc500
RDX: dffffc0000000000 RSI: ffffffff8bcada20 RDI: ffffffff8c206c80
RBP: ffffc900091e7a38 R08: ffffffff92fe4777 R09: 1ffffffff25fc8ee
R10: dffffc0000000000 R11: fffffbfff25fc8ef R12: 1ffff9200123cf24
R13: dffffc0000000000 R14: ffffc900091e7940 R15: 0000000000000246
FS: 00007f48651b26c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f48651b1f80 CR3: 0000000054040000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__might_fault+0xc6/0x120 mm/memory.c:6374
__copy_from_user include/linux/uaccess.h:97 [inline]
check_xstate_in_sigframe arch/x86/kernel/fpu/signal.c:35 [inline]
__fpu_restore_sig arch/x86/kernel/fpu/signal.c:348 [inline]
fpu__restore_sig+0x1ad/0x1350 arch/x86/kernel/fpu/signal.c:493
restore_sigcontext+0x675/0x7d0 arch/x86/kernel/signal_64.c:95
__do_sys_rt_sigreturn+0x17f/0x270 arch/x86/kernel/signal_64.c:263
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: 0033:0x7f486447d0a7
Code: 14 25 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
RSP: 002b:00007f48651b2178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f48645b3f88 RCX: 00007f486447d0a9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f48645b3f88
RBP: 00007f48645b3f80 R08: 00007f48651b26c0 R09: 00007f48651b26c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f48645b3f8c
R13: 000000000000000b R14: 00007ffc87464350 R15: 00007ffc87464438