rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P15384/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=82057, q=336 ncpus=2)
task:syz.0.3309 state:R running task stack:23544 pid:15384 tgid:15379 ppid:5840 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5260 [inline]
__schedule+0x14ea/0x5050 kernel/sched/core.c:6867
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7194
irqentry_exit+0x597/0x620 kernel/entry/common.c:216
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:228 [inline]
RIP: 0010:unwind_next_frame+0x201/0x23c0 arch/x86/kernel/unwind_orc.c:510
Code: 05 01 00 00 48 c7 c0 00 00 00 81 4d 89 e7 49 29 c7 49 c1 ef 08 8b 15 4e 10 82 0c 8d 42 ff 44 39 f8 0f 86 78 04 00 00 44 89 f8 <4c> 8d 2c 85 4c ef 2d 91 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 48
RSP: 0018:ffffc9000bea6698 EFLAGS: 00000216
RAX: 0000000000085e77 RBX: 0000000000000001 RCX: 0000000080000000
RDX: 00000000000a9ac5 RSI: ffffffff8c073a60 RDI: ffffffff8c073a20
RBP: dffffc0000000000 R08: ffffffff81759195 R09: ffffffff8e55a360
R10: ffffc9000bea67b8 R11: ffffffff81afb170 R12: ffffffff895e77ec
R13: ffffc9000bea67b8 R14: ffffc9000bea6768 R15: 0000000000085e77
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2540 [inline]
slab_free mm/slub.c:6674 [inline]
kfree+0x1be/0x650 mm/slub.c:6882
kobject_uevent_env+0x378/0x9e0 lib/kobject_uevent.c:640
rx_queue_add_kobject net/core/net-sysfs.c:1280 [inline]
net_rx_queue_update_kobjects+0x3e5/0x740 net/core/net-sysfs.c:1322
register_queue_kobjects net/core/net-sysfs.c:2114 [inline]
netdev_register_kobject+0x21f/0x310 net/core/net-sysfs.c:2362
register_netdevice+0x12a0/0x1cd0 net/core/dev.c:11406
bond_newlink+0x48/0xd0 drivers/net/bonding/bond_netlink.c:601
rtnl_newlink_create+0x329/0xb70 net/core/rtnetlink.c:3840
__rtnl_newlink net/core/rtnetlink.c:3957 [inline]
rtnl_newlink+0x1666/0x1be0 net/core/rtnetlink.c:4072
rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6958
netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg net/socket.c:742 [inline]
____sys_sendmsg+0xa68/0xad0 net/socket.c:2592
___sys_sendmsg+0x2a5/0x360 net/socket.c:2646
__sys_sendmsg net/socket.c:2678 [inline]
__do_sys_sendmsg net/socket.c:2683 [inline]
__se_sys_sendmsg net/socket.c:2681 [inline]
__x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2681
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f79bb19aeb9
RSP: 002b:00007f79bc03d028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f79bb416180 RCX: 00007f79bb19aeb9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000005
RBP: 00007f79bb208c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f79bb416218 R14: 00007f79bb416180 R15: 00007f79bb53fa48
rcu: rcu_preempt kthread timer wakeup didn't happen for 10497 jiffies! g82057 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=36724
rcu: rcu_preempt kthread starved for 10498 jiffies! g82057 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28000 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5260 [inline]
__schedule+0x14ea/0x5050 kernel/sched/core.c:6867
__schedule_loop kernel/sched/core.c:6949 [inline]
schedule+0x164/0x360 kernel/sched/core.c:6964
schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x312/0x1560 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:2285
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 15377 Comm: syz.4.3308 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:num_possible_cpus include/linux/cpumask.h:1222 [inline]
RIP: 0010:mm_get_cid kernel/sched/sched.h:3782 [inline]
RIP: 0010:sched_mm_cid_fork+0x306/0xc20 kernel/sched/core.c:10582
Code: c1 01 00 00 49 c7 c5 c8 a4 f7 8d 49 c1 ed 03 eb 07 44 89 e0 f7 d8 71 8d f3 90 48 b8 00 00 00 00 00 fc ff df 41 0f b6 44 05 00 <84> c0 75 50 44 8b 35 b7 46 63 0c 48 89 ef 4c 89 f6 e8 34 3a 0b 03
RSP: 0018:ffffc9000d1afc78 EFLAGS: 00000887
RAX: 0000000000000000 RBX: 0000000000000002 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff888020ab5510
RBP: ffff888020ab5510 R08: 1ffff11004156951 R09: ffff888020ab4bd4
R10: ffff888020ab4a90 R11: fffff52001a35f80 R12: 0000000080000000
R13: 1ffffffff1bef499 R14: 0000000000000002 R15: ffff888020ab4980
FS: 00007fb15b3146c0(0000) GS:ffff8881256f5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f79bc01bff8 CR3: 0000000034562000 CR4: 00000000003526f0
Call Trace:
bprm_execve+0xda1/0x1410 fs/exec.c:1776
do_execveat_common+0x50f/0x690 fs/exec.c:1859
do_execveat fs/exec.c:1944 [inline]
__do_sys_execveat fs/exec.c:2018 [inline]
__se_sys_execveat fs/exec.c:2012 [inline]
__x64_sys_execveat+0xc4/0xe0 fs/exec.c:2012
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb15a39aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb15b314028 EFLAGS: 00000246 ORIG_RAX: 0000000000000142
RAX: ffffffffffffffda RBX: 00007fb15a615fa0 RCX: 00007fb15a39aeb9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007fb15a408c1f R08: 0000000000001000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb15a616038 R14: 00007fb15a615fa0 R15: 00007fb15a73fa48