#0: ffffc90000a18c00 (net/core/rtnetlink.c:83){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x650 kernel/time/timer.c:1789 #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: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6695 ============================================= rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6372/1:b..l P6407/2:b..l rcu: (detected by 1, t=10502 jiffies, g=17381, q=448 ncpus=2) task:syz.4.257 state:R running task stack:22656 pid:6407 tgid:6403 ppid:5660 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5239 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6603 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6925 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: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:ffffc900041970e0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff92000832e28 RCX: 258aaa3a1fd8cf00 RDX: dffffc0000000000 RSI: ffffffff8c0ae6c0 RDI: ffffffff8c607bc0 RBP: ffffc90004197228 R08: ffffffff93735807 R09: 1ffffffff26e6b00 R10: dffffc0000000000 R11: fffffbfff26e6b01 R12: 1ffff92000832e24 R13: dffffc0000000000 R14: ffffc90004197140 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:326 [inline] rcu_read_lock include/linux/rcupdate.h:838 [inline] prepend_path+0x1f0/0xbe0 fs/d_path.c:168 d_absolute_path+0x179/0x310 fs/d_path.c:234 ima_d_path+0x104/0x270 security/integrity/ima/ima_api.c:446 process_measurement+0x13e6/0x1fb0 security/integrity/ima/ima_main.c:377 ima_file_check+0xf2/0x170 security/integrity/ima/ima_main.c:572 security_file_post_open+0x6d/0xa0 security/security.c:3008 do_open fs/namei.c:3729 [inline] path_openat+0x2b91/0x3470 fs/namei.c:3886 do_filp_open+0x235/0x490 fs/namei.c:3913 do_sys_openat2+0x13e/0x1d0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_open fs/open.c:1439 [inline] __se_sys_open fs/open.c:1435 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1435 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: 0033:0x7fe629375f19 RSP: 002b:00007fe62a0f0048 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fe629506038 RCX: 00007fe629375f19 RDX: 0000000000000000 RSI: 000000000014d27e RDI: 0000000020000180 RBP: 00007fe6293e4e68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fe629506038 R15: 00007ffe07f68348 task:syz.2.251 state:R running task stack:20760 pid:6372 tgid:6371 ppid:5557 flags:0x00004006 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] zap_pte_range mm/memory.c:1688 [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+0x3818/0x42c0 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 get_signal+0x16a1/0x1740 kernel/signal.c:2917 arch_do_signal_or_restart+0x96/0x830 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [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+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa9d1b75f19 RSP: 002b:00007fa9d29fe048 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffa2 RBX: 00007fa9d1d05f60 RCX: 00007fa9d1b75f19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a RBP: 00007fa9d1be4e68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fa9d1d05f60 R15: 00007fff25b3df08 rcu: rcu_preempt kthread starved for 10572 jiffies! g17381 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:25168 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 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111 DEBUG: holding rtnl_mutex for 10605 jiffies. task:syz-executor state:R running task stack:21712 pid:6365 tgid:6365 ppid:6354 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 unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672 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 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4080 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:664 alloc_skb include/linux/skbuff.h:1320 [inline] alloc_uevent_skb+0x74/0x230 lib/kobject_uevent.c:289 uevent_net_broadcast_tagged lib/kobject_uevent.c:352 [inline] kobject_uevent_net_broadcast+0x182/0x580 lib/kobject_uevent.c:413 kobject_uevent_env+0x57d/0x8e0 lib/kobject_uevent.c:608 rx_queue_add_kobject net/core/net-sysfs.c:1120 [inline] net_rx_queue_update_kobjects+0x304/0x5b0 net/core/net-sysfs.c:1160 register_queue_kobjects net/core/net-sysfs.c:1895 [inline] netdev_register_kobject+0x224/0x320 net/core/net-sysfs.c:2140 register_netdevice+0x12c5/0x1b00 net/core/dev.c:10435 register_vlan_dev+0x38c/0x810 net/8021q/vlan.c:179 vlan_newlink+0x476/0x5c0 net/8021q/vlan_netlink.c:193 rtnl_newlink_create net/core/rtnetlink.c:3597 [inline] __rtnl_newlink net/core/rtnetlink.c:3817 [inline] rtnl_newlink+0x14fe/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_sendto+0x3a4/0x4f0 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2212 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: 0033:0x7f4461177cac RSP: 002b:00007fffa589cb00 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f4461e34620 RCX: 00007f4461177cac RDX: 0000000000000054 RSI: 00007f4461e34670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fffa589cb54 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f4461e34670 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by getty/4973: #0: ffff8880307c10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/1:3/5272: 2 locks held by kworker/u8:9/5534: 1 lock held by udevd/5664: 1 lock held by syz-executor/6365: 2 locks held by syz.2.251/6372: 1 lock held by syz.4.257/6405: 3 locks held by syz.4.257/6407: 2 locks held by syz.3.259/6416: #0: ffff888068eaa070 (&newdev->mutex){+.+.}-{3:3}, at: uinput_ioctl_handler+0xeb/0x1770 drivers/input/misc/uinput.c:885 #1: ffffffff8f70b9e8 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xaee/0x1110 drivers/input/input.c:2466 ============================================= DEBUG: holding rtnl_mutex for 10773 jiffies. task:syz-executor state:R running task stack:21712 pid:6365 tgid:6365 ppid:6354 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 unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672 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 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4080 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:664 alloc_skb include/linux/skbuff.h:1320 [inline] alloc_uevent_skb+0x74/0x230 lib/kobject_uevent.c:289 uevent_net_broadcast_tagged lib/kobject_uevent.c:352 [inline] kobject_uevent_net_broadcast+0x182/0x580 lib/kobject_uevent.c:413 kobject_uevent_env+0x57d/0x8e0 lib/kobject_uevent.c:608 rx_queue_add_kobject net/core/net-sysfs.c:1120 [inline] net_rx_queue_update_kobjects+0x304/0x5b0 net/core/net-sysfs.c:1160 register_queue_kobjects net/core/net-sysfs.c:1895 [inline] netdev_register_kobject+0x224/0x320 net/core/net-sysfs.c:2140 register_netdevice+0x12c5/0x1b00 net/core/dev.c:10435 register_vlan_dev+0x38c/0x810 net/8021q/vlan.c:179 vlan_newlink+0x476/0x5c0 net/8021q/vlan_netlink.c:193 rtnl_newlink_create net/core/rtnetlink.c:3597 [inline] __rtnl_newlink net/core/rtnetlink.c:3817 [inline] rtnl_newlink+0x14fe/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_sendto+0x3a4/0x4f0 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2212 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: 0033:0x7f4461177cac RSP: 002b:00007fffa589cb00 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f4461e34620 RCX: 00007f4461177cac RDX: 0000000000000054 RSI: 00007f4461e34670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fffa589cb54 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f4461e34670 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by getty/4973: #0: ffff8880307c10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/1:3/5272: 2 locks held by kworker/u8:9/5534: 1 lock held by udevd/5664: 1 lock held by syz-executor/6365: 2 locks held by syz.2.251/6372: 1 lock held by syz.4.257/6405: 3 locks held by syz.4.257/6407: 2 locks held by syz.3.259/6416: #0: ffff888068eaa070 (&newdev->mutex){+.+.}-{3:3}, at: uinput_ioctl_handler+0xeb/0x1770 drivers/input/misc/uinput.c:885 #1: ffffffff8f70b9e8 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xaee/0x1110 drivers/input/input.c:2466 2 locks held by syz.0.260/6415: #0: ffffc90000a18c00 (net/core/rtnetlink.c:83){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x650 kernel/time/timer.c:1789 #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: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6695 ============================================= DEBUG: holding rtnl_mutex for 10941 jiffies. task:syz-executor state:R running task stack:21712 pid:6365 tgid:6365 ppid:6354 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 unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672 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 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4080 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:664 alloc_skb include/linux/skbuff.h:1320 [inline] alloc_uevent_skb+0x74/0x230 lib/kobject_uevent.c:289 uevent_net_broadcast_tagged lib/kobject_uevent.c:352 [inline] kobject_uevent_net_broadcast+0x182/0x580 lib/kobject_uevent.c:413 kobject_uevent_env+0x57d/0x8e0 lib/kobject_uevent.c:608 rx_queue_add_kobject net/core/net-sysfs.c:1120 [inline] net_rx_queue_update_kobjects+0x304/0x5b0 net/core/net-sysfs.c:1160 register_queue_kobjects net/core/net-sysfs.c:1895 [inline] netdev_register_kobject+0x224/0x320 net/core/net-sysfs.c:2140 register_netdevice+0x12c5/0x1b00 net/core/dev.c:10435 register_vlan_dev+0x38c/0x810 net/8021q/vlan.c:179 vlan_newlink+0x476/0x5c0 net/8021q/vlan_netlink.c:193 rtnl_newlink_create net/core/rtnetlink.c:3597 [inline] __rtnl_newlink net/core/rtnetlink.c:3817 [inline] rtnl_newlink+0x14fe/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_sendto+0x3a4/0x4f0 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2212 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: 0033:0x7f4461177cac RSP: 002b:00007fffa589cb00 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f4461e34620 RCX: 00007f4461177cac RDX: 0000000000000054 RSI: 00007f4461e34670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fffa589cb54 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f4461e34670 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by getty/4973: #0: ffff8880307c10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/1:3/5272: 2 locks held by kworker/u8:9/5534: 1 lock held by udevd/5664: 1 lock held by syz-executor/6365: 2 locks held by syz.2.251/6372: 1 lock held by syz.4.257/6405: 3 locks held by syz.4.257/6407: 2 locks held by syz.3.259/6416: #0: ffff888068eaa070 (&newdev->mutex){+.+.}-{3:3}, at: uinput_ioctl_handler+0xeb/0x1770 drivers/input/misc/uinput.c:885 #1: ffffffff8f70b9e8 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xaee/0x1110 drivers/input/input.c:2466 ============================================= DEBUG: holding rtnl_mutex for 11109 jiffies. task:syz-executor state:R running task stack:21712 pid:6365 tgid:6365 ppid:6354 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 unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672 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 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4080 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:664 alloc_skb include/linux/skbuff.h:1320 [inline] alloc_uevent_skb+0x74/0x230 lib/kobject_uevent.c:289 uevent_net_broadcast_tagged lib/kobject_uevent.c:352 [inline] kobject_uevent_net_broadcast+0x182/0x580 lib/kobject_uevent.c:413 kobject_uevent_env+0x57d/0x8e0 lib/kobject_uevent.c:608 rx_queue_add_kobject net/core/net-sysfs.c:1120 [inline] net_rx_queue_update_kobjects+0x304/0x5b0 net/core/net-sysfs.c:1160 register_queue_kobjects net/core/net-sysfs.c:1895 [inline] netdev_register_kobject+0x224/0x320 net/core/net-sysfs.c:2140 register_netdevice+0x12c5/0x1b00 net/core/dev.c:10435 register_vlan_dev+0x38c/0x810 net/8021q/vlan.c:179 vlan_newlink+0x476/0x5c0 net/8021q/vlan_netlink.c:193 rtnl_newlink_create net/core/rtnetlink.c:3597 [inline] __rtnl_newlink net/core/rtnetlink.c:3817 [inline] rtnl_newlink+0x14fe/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_sendto+0x3a4/0x4f0 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2212 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: 0033:0x7f4461177cac RSP: 002b:00007fffa589cb00 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f4461e34620 RCX: 00007f4461177cac RDX: 0000000000000054 RSI: 00007f4461e34670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fffa589cb54 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f4461e34670 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by getty/4973: #0: ffff8880307c10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/1:3/5272: 2 locks held by kworker/u8:9/5534: 1 lock held by udevd/5664: 1 lock held by syz-executor/6365: 2 locks held by syz.2.251/6372: 1 lock held by syz.4.257/6405: 3 locks held by syz.4.257/6407: 2 locks held by syz.3.259/6416: #0: ffff888068eaa070 (&newdev->mutex){+.+.}-{3:3}, at: uinput_ioctl_handler+0xeb/0x1770 drivers/input/misc/uinput.c:885 #1: ffffffff8f70b9e8 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xaee/0x1110 drivers/input/input.c:2466 ============================================= DEBUG: holding rtnl_mutex for 11277 jiffies. task:syz-executor state:R running task stack:21712 pid:6365 tgid:6365 ppid:6354 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 unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672 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 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4080 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:664 alloc_skb include/linux/skbuff.h:1320 [inline] alloc_uevent_skb+0x74/0x230 lib/kobject_uevent.c:289 uevent_net_broadcast_tagged lib/kobject_uevent.c:352 [inline] kobject_uevent_net_broadcast+0x182/0x580 lib/kobject_uevent.c:413 kobject_uevent_env+0x57d/0x8e0 lib/kobject_uevent.c:608 rx_queue_add_kobject net/core/net-sysfs.c:1120 [inline] net_rx_queue_update_kobjects+0x304/0x5b0 net/core/net-sysfs.c:1160 register_queue_kobjects net/core/net-sysfs.c:1895 [inline] netdev_register_kobject+0x224/0x320 net/core/net-sysfs.c:2140 register_netdevice+0x12c5/0x1b00 net/core/dev.c:10435 register_vlan_dev+0x38c/0x810 net/8021q/vlan.c:179 vlan_newlink+0x476/0x5c0 net/8021q/vlan_netlink.c:193 rtnl_newlink_create net/core/rtnetlink.c:3597 [inline] __rtnl_newlink net/core/rtnetlink.c:3817 [inline] rtnl_newlink+0x14fe/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_sendto+0x3a4/0x4f0 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2212 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: 0033:0x7f4461177cac RSP: 002b:00007fffa589cb00 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f4461e34620 RCX: 00007f4461177cac RDX: 0000000000000054 RSI: 00007f4461e34670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fffa589cb54 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f4461e34670 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by getty/4973: #0: ffff8880307c10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/1:3/5272: 2 locks held by kworker/u8:9/5534: 1 lock held by udevd/5664: 1 lock held by syz-executor/6365: 2 locks held by syz.2.251/6372: 1 lock held by syz.4.257/6405: 3 locks held by syz.4.257/6407: 2 locks held by syz.3.259/6416: #0: ffff888068eaa070 (&newdev->mutex){+.+.}-{3:3}, at: uinput_ioctl_handler+0xeb/0x1770 drivers/input/misc/uinput.c:885 #1: ffffffff8f70b9e8 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xaee/0x1110 drivers/input/input.c:2466 ============================================= DEBUG: holding rtnl_mutex for 11445 jiffies. task:syz-executor state:R running task stack:21712 pid:6365 tgid:6365 ppid:6354 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 unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672 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 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4080 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:664 alloc_skb include/linux/skbuff.h:1320 [inline] alloc_uevent_skb+0x74/0x230 lib/kobject_uevent.c:289 uevent_net_broadcast_tagged lib/kobject_uevent.c:352 [inline] kobject_uevent_net_broadcast+0x182/0x580 lib/kobject_uevent.c:413 kobject_uevent_env+0x57d/0x8e0 lib/kobject_uevent.c:608 rx_queue_add_kobject net/core/net-sysfs.c:1120 [inline] net_rx_queue_update_kobjects+0x304/0x5b0 net/core/net-sysfs.c:1160 register_queue_kobjects net/core/net-sysfs.c:1895 [inline] netdev_register_kobject+0x224/0x320 net/core/net-sysfs.c:2140 register_netdevice+0x12c5/0x1b00 net/core/dev.c:10435 register_vlan_dev+0x38c/0x810 net/8021q/vlan.c:179 vlan_newlink+0x476/0x5c0 net/8021q/vlan_netlink.c:193 rtnl_newlink_create net/core/rtnetlink.c:3597 [inline] __rtnl_newlink net/core/rtnetlink.c:3817 [inline] rtnl_newlink+0x14fe/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_sendto+0x3a4/0x4f0 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2212 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: 0033:0x7f4461177cac RSP: 002b:00007fffa589cb00 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f4461e34620 RCX: 00007f4461177cac RDX: 0000000000000054 RSI: 00007f4461e34670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fffa589cb54 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f4461e34670 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by getty/4973: #0: ffff8880307c10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/1:3/5272: 2 locks held by kworker/u8:9/5534: 1 lock held by udevd/5664: 1 lock held by syz-executor/6365: 2 locks held by syz.2.251/6372: 1 lock held by syz.4.257/6405: 3 locks held by syz.4.257/6407: 2 locks held by syz.3.259/6416: #0: ffff888068eaa070 (&newdev->mutex){+.+.}-{3:3}, at: uinput_ioctl_handler+0xeb/0x1770 drivers/input/misc/uinput.c:885 #1: ffffffff8f70b9e8 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xaee/0x1110 drivers/input/input.c:2466 =============================================