rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5582/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=15853, q=882 ncpus=2)
task:syz-executor state:R running task stack:20624 pid:5582 tgid:5582 ppid:5561 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5239 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6603
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6782
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6806
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
copy_pte_range mm/memory.c:1191 [inline]
copy_pmd_range+0x7ad5/0x8500 mm/memory.c:1252
copy_pud_range mm/memory.c:1289 [inline]
copy_p4d_range mm/memory.c:1313 [inline]
copy_page_range+0x99f/0xe90 mm/memory.c:1411
dup_mmap kernel/fork.c:750 [inline]
dup_mm kernel/fork.c:1674 [inline]
copy_mm+0x11ea/0x1f30 kernel/fork.c:1723
copy_process+0x186b/0x3d90 kernel/fork.c:2376
kernel_clone+0x226/0x8f0 kernel/fork.c:2788
__do_sys_clone kernel/fork.c:2931 [inline]
__se_sys_clone kernel/fork.c:2915 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2915
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: 0033:0x7feed356db93
RSP: 002b:00007ffdd5de22a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007feed356db93
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055558f6547d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000256a0 R14: 000000000002562e R15: 00007ffdd5de2430
rcu: rcu_preempt kthread starved for 8694 jiffies! g15853 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:25704 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5239 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6603
__schedule_loop kernel/sched/core.c:6680 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6695
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5458 Comm: udevd Not tainted 6.10.0-next-20240726-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline]
RIP: 0010:unwind_next_frame+0x10d8/0x2a00 arch/x86/kernel/unwind_orc.c:585
Code: 87 a9 01 00 00 4d 39 e5 0f 86 a0 01 00 00 49 8d 44 24 08 48 39 c8 0f 86 ad 01 00 00 4c 39 e8 0f 87 a4 01 00 00 e8 f8 b2 52 00 <4d> 89 fd 4c 8b 7c 24 08 e9 69 02 00 00 48 89 ac 24 80 00 00 00 4c
RSP: 0018:ffffc90000006a48 EFLAGS: 00000046
RAX: ffffffff81411828 RBX: 0000000000000002 RCX: ffff888030901e00
RDX: 0000000000010105 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 1ffff92000000d66 R08: ffffffff814117ed R09: ffffffff81411746
R10: 0000000000000003 R11: ffff888030901e00 R12: ffffc90000007530
R13: ffffc90000008000 R14: 1ffff92000000d65 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f91dce0040 CR3: 000000001abf0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2252 [inline]
slab_free mm/slub.c:4473 [inline]
kfree+0x149/0x360 mm/slub.c:4594
dummy_timer+0x7ce/0x45a0 drivers/usb/gadget/udc/dummy_hcd.c:1981
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_flush_all+0x9f7/0xf50 kernel/printk/printk.c:3103
Code: 20 00 90 0f 0b 90 e9 f3 f9 ff ff e8 83 1c 20 00 e8 8e c7 45 0a 4d 85 f6 74 c0 e8 74 1c 20 00 fb 49 bd 00 00 00 00 00 fc ff df <43> 80 3c 2f 00 48 8b 5c 24 30 74 08 48 89 df e8 e5 a0 87 00 4c 8b
RSP: 0018:ffffc900000075e0 EFLAGS: 00000246
RAX: ffffffff8173aeac RBX: 0000000000000000 RCX: ffff888030901e00
RDX: 0000000000000103 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007770 R08: ffffffff8173ae53 R09: 1ffffffff26e6f00
R10: dffffc0000000000 R11: fffffbfff26e6f01 R12: ffffffff8f1328a0
R13: dffffc0000000000 R14: 0000000000000200 R15: 1ffffffff1e2651f
console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3173
vprintk_emit+0x7a1/0x900 kernel/printk/printk.c:2423
_printk+0xd5/0x120 kernel/printk/printk.c:2450
lockdep_print_held_locks+0xf7/0x210 kernel/locking/lockdep.c:790
debug_show_all_locks+0x197/0x2a0 kernel/locking/lockdep.c:6699
report_rtnl_holders+0x3b4/0x400 net/core/rtnetlink.c:115
call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792
expire_timers kernel/time/timer.c:1843 [inline]
__run_timers kernel/time/timer.c:2417 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428
run_timer_base kernel/time/timer.c:2437 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447
handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5826
Code: 2b 00 74 08 4c 89 f7 e8 aa 9e 8b 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:ffffc900042e73c0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200085ce84 RCX: 59a3ea2298522000
RDX: dffffc0000000000 RSI: ffffffff8c0ae6c0 RDI: ffffffff8c607c40
RBP: ffffc900042e7510 R08: ffffffff93737807 R09: 1ffffffff26e6f00
R10: dffffc0000000000 R11: fffffbfff26e6f01 R12: 1ffff9200085ce80
R13: dffffc0000000000 R14: ffffc900042e7420 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:930 [inline]
pfn_valid+0x113/0x450 include/linux/mmzone.h:2024
page_table_check_clear+0x1e/0x550 mm/page_table_check.c:70
clear_full_ptes include/linux/pgtable.h:715 [inline]
zap_present_folio_ptes mm/memory.c:1506 [inline]
zap_present_ptes mm/memory.c:1576 [inline]
zap_pte_range mm/memory.c:1618 [inline]
zap_pmd_range mm/memory.c:1736 [inline]
zap_pud_range mm/memory.c:1765 [inline]
zap_p4d_range mm/memory.c:1786 [inline]
unmap_page_range+0x2b66/0x42c0 mm/memory.c:1807
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1897
exit_mmap+0x264/0xc80 mm/mmap.c:3412
__mmput+0x115/0x390 kernel/fork.c:1347
exit_mm+0x220/0x310 kernel/exit.c:571
do_exit+0x9b2/0x27f0 kernel/exit.c:869
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
__do_sys_exit_group kernel/exit.c:1042 [inline]
__se_sys_exit_group kernel/exit.c:1040 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040
x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7fdb256fca90
Code: Unable to access opcode bytes at 0x7fdb256fca66.
RSP: 002b:00007fffae97a5a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdb256fca90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000007 R09: b5faa1a001ae9440
R10: 00000000000001e0 R11: 0000000000000202 R12: 000055f91dd39550
R13: 00007fffae97a5e8 R14: 0000000000000001 R15: 000055f91dcd3910
#0: ffffffff8fc82ac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
#0: ffffffff8fc82ac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6eb/0xd00 net/core/rtnetlink.c:6731
#1: ffffffff8e93ce38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#1: ffffffff8e93ce38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:967
2 locks held by syz.1.285/6401:
=============================================
DEBUG: holding rtnl_mutex for 10645 jiffies.
task:syz.2.284 state:D stack:24912 pid:6400 tgid:6399 ppid:5230 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5239 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6603
__schedule_loop kernel/sched/core.c:6680 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6695
synchronize_rcu_expedited+0x684/0x830 kernel/rcu/tree_exp.h:982
dev_deactivate_many+0x4a7/0xb10 net/sched/sch_generic.c:1371
__dev_close_many+0x1a4/0x300 net/core/dev.c:1545
__dev_close net/core/dev.c:1570 [inline]
__dev_change_flags+0x30e/0x6f0 net/core/dev.c:8835
dev_change_flags+0x8b/0x1a0 net/core/dev.c:8909
do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2987
__rtnl_newlink net/core/rtnetlink.c:3783 [inline]
rtnl_newlink+0x17a9/0x2070 net/core/rtnetlink.c:3830
rtnetlink_rcv_msg+0x744/0xd00 net/core/rtnetlink.c:6734
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
___sys_sendmsg net/socket.c:2651 [inline]
__sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680
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: 0033:0x7fb366577299
RSP: 002b:00007fb36733c048 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb366705f80 RCX: 00007fb366577299
RDX: 0000000000000000 RSI: 0000000020000600 RDI: 0000000000000006
RBP: 00007fb3665e48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb366705f80 R15: 00007fffcd4ff618
DEBUG: waiting rtnl_mutex for 10663 jiffies.
task:syz.2.284 state:D stack:24672 pid:6399 tgid:6399 ppid:5230 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5239 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6603
__schedule_loop kernel/sched/core.c:6680 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6695
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
packet_flush_mclist net/packet/af_packet.c:3833 [inline]
packet_release+0x47e/0xcd0 net/packet/af_packet.c:3215
__sock_release net/socket.c:659 [inline]
sock_close+0xbc/0x240 net/socket.c:1421
__fput+0x24a/0x8a0 fs/file_table.c:422
task_work_run+0x24f/0x310 kernel/task_work.c:222
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb366577299
RSP: 002b:00007fffcd4ff778 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fb366707a80 RCX: 00007fb366577299
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fb366707a80 R08: 0000000000000006 R09: 00007fffcd4ffa5f
R10: 00000000005f6a90 R11: 0000000000000246 R12: 00000000000265d9
R13: 00007fffcd4ff870 R14: 00007fffcd4ff890 R15: ffffffffffffffff
Showing all locks held in the system:
6 locks held by kworker/0:0/8:
3 locks held by kworker/u8:6/1208:
5 locks held by kworker/u8:10/4610:
#0: ffff888015889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff888015889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc9000d247d00 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc9000d247d00 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffff88807e378768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:6014 [inline]
#2: ffff88807e378768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: cfg80211_wiphy_work+0xd9/0x490 net/wireless/core.c:426
#3: ffffc90000007c00 (net/core/rtnetlink.c:83){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x650 kernel/time/timer.c:1789
#4: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#4: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#4: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6695
2 locks held by klogd/4669:
2 locks held by udevd/4680:
1 lock held by dhcpcd/4893:
2 locks held by getty/4977:
#0: ffff8880309380a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
3 locks held by syz-executor/5210:
2 locks held by udevd/5224:
2 locks held by udevd/5231:
2 locks held by udevd/5240:
2 locks held by udevd/5245:
2 locks held by udevd/5246:
2 locks held by kworker/0:8/5283:
2 locks held by udevd/5458:
4 locks held by syz-executor/5582:
2 locks held by udevd/5666:
2 locks held by syz.2.284/6399:
#0: ffff88807db2e208 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline]
#0: ffff88807db2e208 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline]
#0: ffff88807db2e208 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1421
#1: ffffffff8fc82ac8 (rtnl_mutex){+.+.}-{3:3}, at: packet_flush_mclist net/packet/af_packet.c:3833 [inline]
#1: ffffffff8fc82ac8 (rtnl_mutex){+.+.}-{3:3}, at: packet_release+0x47e/0xcd0 net/packet/af_packet.c:3215
2 locks held by syz.2.284/6400:
#0: ffffffff8fc82ac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
#0: ffffffff8fc82ac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6eb/0xd00 net/core/rtnetlink.c:6731
#1: ffffffff8e93ce38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#1: ffffffff8e93ce38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:967
2 locks held by syz.1.285/6401:
=============================================
DEBUG: holding rtnl_mutex for 10934 jiffies.
task:syz.2.284 state:D stack:24912 pid:6400 tgid:6399 ppid:5230 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5239 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6603
__schedule_loop kernel/sched/core.c:6680 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6695
synchronize_rcu_expedited+0x684/0x830 kernel/rcu/tree_exp.h:982
dev_deactivate_many+0x4a7/0xb10 net/sched/sch_generic.c:1371
__dev_close_many+0x1a4/0x300 net/core/dev.c:1545
__dev_close net/core/dev.c:1570 [inline]
__dev_change_flags+0x30e/0x6f0 net/core/dev.c:8835
dev_change_flags+0x8b/0x1a0 net/core/dev.c:8909
do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2987
__rtnl_newlink net/core/rtnetlink.c:3783 [inline]
rtnl_newlink+0x17a9/0x2070 net/core/rtnetlink.c:3830
rtnetlink_rcv_msg+0x744/0xd00 net/core/rtnetlink.c:6734
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
___sys_sendmsg net/socket.c:2651 [inline]
__sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680
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: 0033:0x7fb366577299
RSP: 002b:00007fb36733c048 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb366705f80 RCX: 00007fb366577299
RDX: 0000000000000000 RSI: 0000000020000600 RDI: 0000000000000006
RBP: 00007fb3665e48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb366705f80 R15: 00007fffcd4ff618
DEBUG: waiting rtnl_mutex for 10945 jiffies.
task:syz.2.284 state:D stack:24672 pid:6399 tgid:6399 ppid:5230 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5239 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6603
__schedule_loop kernel/sched/core.c:6680 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6695
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
packet_flush_mclist net/packet/af_packet.c:3833 [inline]
packet_release+0x47e/0xcd0 net/packet/af_packet.c:3215
__sock_release net/socket.c:659 [inline]
sock_close+0xbc/0x240 net/socket.c:1421
__fput+0x24a/0x8a0 fs/file_table.c:422
task_work_run+0x24f/0x310 kernel/task_work.c:222
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb366577299
RSP: 002b:00007fffcd4ff778 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fb366707a80 RCX: 00007fb366577299
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fb366707a80 R08: 0000000000000006 R09: 00007fffcd4ffa5f
R10: 00000000005f6a90 R11: 0000000000000246 R12: 00000000000265d9
R13: 00007fffcd4ff870 R14: 00007fffcd4ff890 R15: ffffffffffffffff
Showing all locks held in the system:
6 locks held by kworker/0:0/8:
3 locks held by kworker/u8:6/1208:
3 locks held by kworker/u8:10/4610:
2 locks held by klogd/4669:
2 locks held by udevd/4680:
1 lock held by dhcpcd/4893:
2 locks held by getty/4977:
#0: ffff8880309380a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
3 locks held by syz-executor/5210:
2 locks held by udevd/5224:
5 locks held by udevd/5231:
#0: ffff888025502798 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:144 [inline]
#0: ffff888025502798 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x159/0xc80 mm/mmap.c:3396
#1: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#1: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#1: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: __pte_offset_map+0x82/0x380 mm/pgtable-generic.c:287
#2: ffff888065b3fbb8 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
#2: ffff888065b3fbb8 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: __pte_offset_map_lock+0x1ba/0x300 mm/pgtable-generic.c:375
#3: ffffc90000007c00 (net/core/rtnetlink.c:83){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x650 kernel/time/timer.c:1789
#4: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#4: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#4: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6695
2 locks held by udevd/5240:
2 locks held by udevd/5245:
2 locks held by udevd/5246:
2 locks held by kworker/0:8/5283:
2 locks held by udevd/5458:
4 locks held by syz-executor/5582:
2 locks held by udevd/5666:
2 locks held by syz.2.284/6399:
#0: ffff88807db2e208 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline]
#0: ffff88807db2e208 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline]
#0: ffff88807db2e208 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1421
#1: ffffffff8fc82ac8 (rtnl_mutex){+.+.}-{3:3}, at: packet_flush_mclist net/packet/af_packet.c:3833 [inline]
#1: ffffffff8fc82ac8 (rtnl_mutex){+.+.}-{3:3}, at: packet_release+0x47e/0xcd0 net/packet/af_packet.c:3215
2 locks held by syz.2.284/6400:
#0: ffffffff8fc82ac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
#0: ffffffff8fc82ac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6eb/0xd00 net/core/rtnetlink.c:6731
#1: ffffffff8e93ce38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#1: ffffffff8e93ce38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:967
2 locks held by syz.1.285/6401:
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