rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P9321/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=43141, q=237 ncpus=2)
task:syz-executor.1 state:R running task stack:23408 pid:9321 tgid:9317 ppid:5113 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
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_acquire+0x264/0x550 kernel/locking/lockdep.c:5821
Code: 2b 00 74 08 4c 89 f7 e8 4a fe 89 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:ffffc9000f87ec20 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92001f0fd90 RCX: 456e7aec44267b00
RDX: dffffc0000000000 RSI: ffffffff8bcad060 RDI: ffffffff8c200640
RBP: ffffc9000f87ed80 R08: ffffffff92fc36c7 R09: 1ffffffff25f86d8
R10: dffffc0000000000 R11: fffffbfff25f86d9 R12: 1ffff92001f0fd8c
R13: dffffc0000000000 R14: ffffc9000f87ec80 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
percpu_ref_get_many+0x36/0x140 include/linux/percpu-refcount.h:202
percpu_ref_get include/linux/percpu-refcount.h:222 [inline]
css_get include/linux/cgroup_refcnt.h:11 [inline]
mem_cgroup_commit_charge+0x9f/0x380 mm/memcontrol.c:3134
charge_memcg+0xb1/0x160 mm/memcontrol.c:7534
__mem_cgroup_charge+0x27/0x80 mm/memcontrol.c:7545
mem_cgroup_charge include/linux/memcontrol.h:692 [inline]
shmem_alloc_and_add_folio+0x44b/0xbd0 mm/shmem.c:1663
shmem_get_folio_gfp+0x82d/0x1f50 mm/shmem.c:2041
shmem_fault+0x252/0x6f0 mm/shmem.c:2241
__do_fault+0x135/0x460 mm/memory.c:4651
do_read_fault mm/memory.c:5015 [inline]
do_fault mm/memory.c:5145 [inline]
do_pte_missing mm/memory.c:3956 [inline]
handle_pte_fault+0x3d8d/0x7130 mm/memory.c:5469
__handle_mm_fault mm/memory.c:5612 [inline]
handle_mm_fault+0x10df/0x1ba0 mm/memory.c:5777
do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x30/0x70 arch/x86/lib/copy_user_64.S:57
Code: f9 40 73 40 83 f9 08 73 21 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 <48> 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08
RSP: 0018:ffffc9000f87f930 EFLAGS: 00050206
RAX: ffffffff84b1a701 RBX: 00000000201e8038 RCX: 0000000000000038
RDX: 0000000000000001 RSI: 00000000201e8000 RDI: ffffc9000f87f9c0
RBP: ffffc9000f87fa70 R08: ffffc9000f87f9f7 R09: 1ffff92001f0ff3e
R10: dffffc0000000000 R11: fffff52001f0ff3f R12: 00000000201e8000
R13: dffffc0000000000 R14: ffffc9000f87f9c0 R15: 0000000000000038
copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:125 [inline]
_copy_from_user+0x8c/0xe0 lib/usercopy.c:28
copy_from_user include/linux/uaccess.h:183 [inline]
copy_msghdr_from_user+0xae/0x680 net/socket.c:2515
recvmsg_copy_msghdr net/socket.c:2770 [inline]
___sys_recvmsg net/socket.c:2842 [inline]
do_recvmmsg+0x40f/0xae0 net/socket.c:2940
__sys_recvmmsg net/socket.c:3019 [inline]
__do_sys_recvmmsg net/socket.c:3042 [inline]
__se_sys_recvmmsg net/socket.c:3035 [inline]
__x64_sys_recvmmsg+0x199/0x250 net/socket.c:3035
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: 0033:0x7f9f2b07cee9
RSP: 002b:00007f9f2be790c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f9f2b1b4050 RCX: 00007f9f2b07cee9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f9f2b0da6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f9f2b1b4050 R15: 00007ffe0f6e2e58
rcu: rcu_preempt kthread starved for 10555 jiffies! g43141 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:26448 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2029
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2231
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9340 Comm: syz-executor.0 Tainted: G W 6.10.0-rc2-next-20240605-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:_copy_from_user+0x9c/0xe0 lib/usercopy.c:31
Code: f7 44 89 fe e8 75 e1 4a fd 0f 01 cb 4c 89 f9 4c 89 e6 4c 89 f7 e8 54 96 d7 06 48 89 cb 0f 01 ca 31 ff 48 89 de e8 34 ee e4 fc <48> 85 db 75 14 e8 4a e9 e4 fc 48 89 d8 5b 41 5c 41 5e 41 5f c3 cc
RSP: 0018:ffffc9001341fc18 EFLAGS: 00000297
RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffff888057653c00
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9001341fe30 R08: ffffffff84b1a7dc R09: 1ffff92002683fab
R10: dffffc0000000000 R11: fffff52002683fac R12: 00007f367e281be8
R13: ffffc9001341ff58 R14: ffffc9001341fca0 R15: 00000000000000c0
FS: 00007f367e2826c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f367e281f80 CR3: 000000007c3be000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
copy_from_user include/linux/uaccess.h:183 [inline]
restore_sigcontext+0xd8/0x7d0 arch/x86/kernel/signal_64.c:59
__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: 0033:0x7f367d440359
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007f367e281bc0 EFLAGS: 00000202 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007f367d5b3f88 RCX: 00007f367d440359
RDX: 00007f367e281bc0 RSI: 00007f367e281cf0 RDI: 0000000000000021
RBP: 00007f367d5b3f80 R08: 00007f367e2826c0 R09: 00007f367e2826c0
R10: 0000000000000000 R11: 0000000000000202 R12: 00007f367d5b3f8c
R13: 000000000000000b R14: 00007ffe65748050 R15: 00007ffe65748138