netlink: 60 bytes leftover after parsing attributes in process `syz.0.1955'. FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 ====================================================== WARNING: possible circular locking dependency detected 6.6.101-syzkaller #0 Not tainted ------------------------------------------------------ syz.0.1955/12388 is trying to acquire lock: ffffffff8cd23e00 (console_owner){-.-.}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:339 [inline] ffffffff8cd23e00 (console_owner){-.-.}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline] ffffffff8cd23e00 (console_owner){-.-.}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:292 [inline] ffffffff8cd23e00 (console_owner){-.-.}-{0:0}, at: console_flush_all+0x10f/0xd00 kernel/printk/printk.c:2992 but task is already holding lock: ffff8880b8e3c458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&rq->__lock){-.-.}-{2:2}: _raw_spin_lock_nested+0x32/0x50 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558 raw_spin_rq_lock kernel/sched/sched.h:1372 [inline] rq_lock kernel/sched/sched.h:1681 [inline] task_fork_fair+0x62/0x1f0 kernel/sched/fair.c:12662 sched_cgroup_fork+0x333/0x3c0 kernel/sched/core.c:4817 copy_process+0x21e4/0x3d70 kernel/fork.c:2614 kernel_clone+0x21b/0x840 kernel/fork.c:2914 user_mode_thread+0xde/0x130 kernel/fork.c:2992 rest_init+0x27/0x300 init/main.c:697 arch_call_rest_init+0xe/0x10 init/main.c:829 start_kernel+0x459/0x4e0 init/main.c:1074 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555 copy_bootdata+0x0/0xe0 arch/x86/kernel/head64.c:536 secondary_startup_64_no_verify+0x179/0x17b -> #3 (&p->pi_lock){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa8/0xf0 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:522 [inline] try_to_wake_up+0x61/0x10b0 kernel/sched/core.c:4233 __wake_up_common+0x2a4/0x4e0 kernel/sched/wait.c:107 __wake_up_common_lock kernel/sched/wait.c:138 [inline] __wake_up+0x112/0x190 kernel/sched/wait.c:160 tty_port_default_wakeup+0xa2/0xf0 drivers/tty/tty_port.c:69 serial8250_tx_chars+0x6bd/0x8a0 drivers/tty/serial/8250/8250_port.c:1837 serial8250_handle_irq+0x534/0x6e0 drivers/tty/serial/8250/8250_port.c:1944 serial8250_default_handle_irq+0xb8/0x1a0 drivers/tty/serial/8250/8250_port.c:1964 serial8250_interrupt+0x9f/0x1c0 drivers/tty/serial/8250/8250_core.c:127 __handle_irq_event_percpu+0x276/0x930 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x247/0xb30 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:240 [inline] __common_interrupt+0x13b/0x230 arch/x86/kernel/irq.c:259 common_interrupt+0x5d/0xd0 arch/x86/kernel/irq.c:249 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:678 on_stack arch/x86/include/asm/stacktrace.h:56 [inline] stack_access_ok arch/x86/kernel/unwind_orc.c:393 [inline] deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline] unwind_next_frame+0xed9/0x2970 arch/x86/kernel/unwind_orc.c:585 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1806 [inline] slab_free_freelist_hook+0x130/0x1b0 mm/slub.c:1832 slab_free mm/slub.c:3816 [inline] kmem_cache_free+0xf8/0x280 mm/slub.c:3838 vma_lock_free kernel/fork.c:472 [inline] __vm_area_free+0xe4/0x110 kernel/fork.c:528 rcu_do_batch kernel/rcu/tree.c:2194 [inline] rcu_core+0xcc4/0x1720 kernel/rcu/tree.c:2467 handle_softirqs+0x280/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 __sanitizer_cov_trace_pc+0x0/0x60 unwind_next_frame+0x1cef/0x2970 arch/x86/kernel/unwind_orc.c:665 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1007 [inline] __kmalloc_node_track_caller+0xb2/0x230 mm/slab_common.c:1027 kmalloc_reserve+0x117/0x260 net/core/skbuff.c:581 __alloc_skb+0x138/0x2c0 net/core/skbuff.c:650 alloc_skb include/linux/skbuff.h:1284 [inline] nlmsg_new include/net/netlink.h:999 [inline] ctrl_build_family_msg net/netlink/genetlink.c:1242 [inline] ctrl_getfamily+0x3a2/0x580 net/netlink/genetlink.c:1322 genl_family_rcv_msg_doit+0x209/0x2f0 net/netlink/genetlink.c:971 genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline] genl_rcv_msg+0x60b/0x790 net/netlink/genetlink.c:1066 netlink_rcv_skb+0x216/0x480 net/netlink/af_netlink.c:2555 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1075 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline] netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1356 netlink_sendmsg+0x8c1/0xbe0 net/netlink/af_netlink.c:1904 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x5bf/0x950 net/socket.c:2595 ___sys_sendmsg+0x220/0x290 net/socket.c:2649 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2687 [inline] __se_sys_sendmsg+0x1a5/0x270 net/socket.c:2685 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (&tty->write_wait){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa8/0xf0 kernel/locking/spinlock.c:162 __wake_up_common_lock kernel/sched/wait.c:137 [inline] __wake_up+0xf8/0x190 kernel/sched/wait.c:160 tty_port_default_wakeup+0xa2/0xf0 drivers/tty/tty_port.c:69 serial8250_tx_chars+0x6bd/0x8a0 drivers/tty/serial/8250/8250_port.c:1837 serial8250_handle_irq+0x534/0x6e0 drivers/tty/serial/8250/8250_port.c:1944 serial8250_default_handle_irq+0xb8/0x1a0 drivers/tty/serial/8250/8250_port.c:1964 serial8250_interrupt+0x9f/0x1c0 drivers/tty/serial/8250/8250_core.c:127 __handle_irq_event_percpu+0x276/0x930 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x247/0xb30 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:240 [inline] __common_interrupt+0x13b/0x230 arch/x86/kernel/irq.c:259 common_interrupt+0xb4/0xd0 arch/x86/kernel/irq.c:249 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:678 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xa9/0x110 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] uart_write+0x45b/0x5d0 drivers/tty/serial/serial_core.c:634 process_output_block drivers/tty/n_tty.c:580 [inline] n_tty_write+0xd27/0x11d0 drivers/tty/n_tty.c:2395 iterate_tty_write drivers/tty/tty_io.c:1017 [inline] file_tty_write+0x54b/0x980 drivers/tty/tty_io.c:1088 call_write_iter include/linux/fs.h:2018 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x43b/0x940 fs/read_write.c:584 ksys_write+0x147/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&port_lock_key){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa8/0xf0 kernel/locking/spinlock.c:162 serial8250_console_write+0x16d/0x17a0 drivers/tty/serial/8250/8250_port.c:3434 console_emit_next_record kernel/printk/printk.c:2944 [inline] console_flush_all+0x6cd/0xd00 kernel/printk/printk.c:3000 console_unlock+0xae/0x340 kernel/printk/printk.c:3069 vprintk_emit+0x477/0x600 kernel/printk/printk.c:2341 _printk+0xd0/0x110 kernel/printk/printk.c:2366 register_console+0x91b/0xe60 kernel/printk/printk.c:3583 univ8250_console_init+0x45/0x50 drivers/tty/serial/8250/8250_core.c:717 console_init+0x17b/0x5e0 kernel/printk/printk.c:3726 start_kernel+0x2c0/0x4e0 init/main.c:1010 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555 copy_bootdata+0x0/0xe0 arch/x86/kernel/head64.c:536 secondary_startup_64_no_verify+0x179/0x17b -> #0 (console_owner){-.-.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 console_lock_spinning_enable kernel/printk/printk.c:1871 [inline] console_emit_next_record kernel/printk/printk.c:2938 [inline] console_flush_all+0x693/0xd00 kernel/printk/printk.c:3000 console_unlock+0xae/0x340 kernel/printk/printk.c:3069 vprintk_emit+0x477/0x600 kernel/printk/printk.c:2341 _printk+0xd0/0x110 kernel/printk/printk.c:2366 fail_dump lib/fault-inject.c:45 [inline] should_fail_ex+0x37e/0x4d0 lib/fault-inject.c:153 strncpy_from_user+0x36/0x2e0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:212 [inline] ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:307 [inline] bpf_probe_read_compat_str+0xe1/0x170 kernel/trace/bpf_trace.c:303 bpf_prog_80cae49d75b0d2af+0x74/0x78 bpf_dispatcher_nop_func include/linux/bpf.h:1213 [inline] __bpf_prog_run include/linux/filter.h:612 [inline] bpf_prog_run include/linux/filter.h:619 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2322 [inline] bpf_trace_run2+0x1d1/0x3c0 kernel/trace/bpf_trace.c:2361 __bpf_trace_tlb_flush+0xf6/0x150 include/trace/events/tlb.h:38 trace_tlb_flush+0xea/0x110 include/trace/events/tlb.h:38 switch_mm_irqs_off+0x7aa/0xb10 arch/x86/mm/tlb.c:-1 context_switch kernel/sched/core.c:5365 [inline] __schedule+0xf22/0x44d0 kernel/sched/core.c:6700 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867 preempt_schedule+0xab/0xc0 kernel/sched/core.c:6891 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45 vprintk_emit+0x578/0x600 kernel/printk/printk.c:2342 _printk+0xd0/0x110 kernel/printk/printk.c:2366 __nla_validate_parse+0x2432/0x2cd0 lib/nlattr.c:625 __nla_parse+0x40/0x50 lib/nlattr.c:710 __nlmsg_parse include/net/netlink.h:745 [inline] nlmsg_parse_deprecated include/net/netlink.h:786 [inline] rtnl_valid_dump_ifinfo_req net/core/rtnetlink.c:2196 [inline] rtnl_dump_ifinfo+0x334/0x1290 net/core/rtnetlink.c:2221 netlink_dump+0x756/0xde0 net/netlink/af_netlink.c:2274 netlink_recvmsg+0x677/0xdf0 net/netlink/af_netlink.c:1986 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg net/socket.c:1068 [inline] ____sys_recvmsg+0x29e/0x5b0 net/socket.c:2814 ___sys_recvmsg+0x1b6/0x510 net/socket.c:2856 __sys_recvmsg net/socket.c:2886 [inline] __do_sys_recvmsg net/socket.c:2896 [inline] __se_sys_recvmsg net/socket.c:2893 [inline] __x64_sys_recvmsg+0x1f2/0x2c0 net/socket.c:2893 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: console_owner --> &p->pi_lock --> &rq->__lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rq->__lock); lock(&p->pi_lock); lock(&rq->__lock); lock(console_owner); *** DEADLOCK *** 6 locks held by syz.0.1955/12388: #0: ffff88807bfe6688 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: netlink_dump+0xcc/0xde0 net/netlink/af_netlink.c:2210 #1: ffffffff8dfbb888 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0x71f/0xde0 net/netlink/af_netlink.c:2273 #2: ffff8880b8e3c458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558 #3: ffffffff8cd2fba0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #3: ffffffff8cd2fba0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #3: ffffffff8cd2fba0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2321 [inline] #3: ffffffff8cd2fba0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0xde/0x3c0 kernel/trace/bpf_trace.c:2361 #4: ffffffff8cd23ee0 (console_lock){+.+.}-{0:0}, at: _printk+0xd0/0x110 kernel/printk/printk.c:2366 #5: ffffffff8cc0b6f0 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:339 [inline] #5: ffffffff8cc0b6f0 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline] #5: ffffffff8cc0b6f0 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:292 [inline] #5: ffffffff8cc0b6f0 (console_srcu){....}-{0:0}, at: console_flush_all+0x10f/0xd00 kernel/printk/printk.c:2992 stack backtrace: CPU: 0 PID: 12388 Comm: syz.0.1955 Not tainted 6.6.101-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 check_noncircular+0x2bd/0x3c0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 console_lock_spinning_enable kernel/printk/printk.c:1871 [inline] console_emit_next_record kernel/printk/printk.c:2938 [inline] console_flush_all+0x693/0xd00 kernel/printk/printk.c:3000 console_unlock+0xae/0x340 kernel/printk/printk.c:3069 vprintk_emit+0x477/0x600 kernel/printk/printk.c:2341 _printk+0xd0/0x110 kernel/printk/printk.c:2366 fail_dump lib/fault-inject.c:45 [inline] should_fail_ex+0x37e/0x4d0 lib/fault-inject.c:153 strncpy_from_user+0x36/0x2e0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:212 [inline] ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:307 [inline] bpf_probe_read_compat_str+0xe1/0x170 kernel/trace/bpf_trace.c:303 bpf_prog_80cae49d75b0d2af+0x74/0x78 bpf_dispatcher_nop_func include/linux/bpf.h:1213 [inline] __bpf_prog_run include/linux/filter.h:612 [inline] bpf_prog_run include/linux/filter.h:619 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2322 [inline] bpf_trace_run2+0x1d1/0x3c0 kernel/trace/bpf_trace.c:2361 __bpf_trace_tlb_flush+0xf6/0x150 include/trace/events/tlb.h:38 trace_tlb_flush+0xea/0x110 include/trace/events/tlb.h:38 switch_mm_irqs_off+0x7aa/0xb10 arch/x86/mm/tlb.c:-1 context_switch kernel/sched/core.c:5365 [inline] __schedule+0xf22/0x44d0 kernel/sched/core.c:6700 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867 preempt_schedule+0xab/0xc0 kernel/sched/core.c:6891 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45 vprintk_emit+0x578/0x600 kernel/printk/printk.c:2342 _printk+0xd0/0x110 kernel/printk/printk.c:2366 __nla_validate_parse+0x2432/0x2cd0 lib/nlattr.c:625 __nla_parse+0x40/0x50 lib/nlattr.c:710 __nlmsg_parse include/net/netlink.h:745 [inline] nlmsg_parse_deprecated include/net/netlink.h:786 [inline] rtnl_valid_dump_ifinfo_req net/core/rtnetlink.c:2196 [inline] rtnl_dump_ifinfo+0x334/0x1290 net/core/rtnetlink.c:2221 netlink_dump+0x756/0xde0 net/netlink/af_netlink.c:2274 netlink_recvmsg+0x677/0xdf0 net/netlink/af_netlink.c:1986 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg net/socket.c:1068 [inline] ____sys_recvmsg+0x29e/0x5b0 net/socket.c:2814 ___sys_recvmsg+0x1b6/0x510 net/socket.c:2856 __sys_recvmsg net/socket.c:2886 [inline] __do_sys_recvmsg net/socket.c:2896 [inline] __se_sys_recvmsg net/socket.c:2893 [inline] __x64_sys_recvmsg+0x1f2/0x2c0 net/socket.c:2893 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fc89f18ebe9 Code: Unable to access opcode bytes at 0x7fc89f18ebbf. RSP: 002b:00007fc89ff8a038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007fc89f3b6180 RCX: 00007fc89f18ebe9 RDX: 0000000040000002 RSI: 0000200000000e80 RDI: 0000000000000003 RBP: 00007fc89ff8a090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fc89f3b6218 R14: 00007fc89f3b6180 R15: 00007ffc564c7248 CPU: 0 PID: 12388 Comm: syz.0.1955 Not tainted 6.6.101-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 fail_dump lib/fault-inject.c:52 [inline] should_fail_ex+0x39d/0x4d0 lib/fault-inject.c:153 strncpy_from_user+0x36/0x2e0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:212 [inline] ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:307 [inline] bpf_probe_read_compat_str+0xe1/0x170 kernel/trace/bpf_trace.c:303 bpf_prog_80cae49d75b0d2af+0x74/0x78 bpf_dispatcher_nop_func include/linux/bpf.h:1213 [inline] __bpf_prog_run include/linux/filter.h:612 [inline] bpf_prog_run include/linux/filter.h:619 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2322 [inline] bpf_trace_run2+0x1d1/0x3c0 kernel/trace/bpf_trace.c:2361 __bpf_trace_tlb_flush+0xf6/0x150 include/trace/events/tlb.h:38 trace_tlb_flush+0xea/0x110 include/trace/events/tlb.h:38 switch_mm_irqs_off+0x7aa/0xb10 arch/x86/mm/tlb.c:-1 context_switch kernel/sched/core.c:5365 [inline] __schedule+0xf22/0x44d0 kernel/sched/core.c:6700 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867 preempt_schedule+0xab/0xc0 kernel/sched/core.c:6891 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45 vprintk_emit+0x578/0x600 kernel/printk/printk.c:2342 _printk+0xd0/0x110 kernel/printk/printk.c:2366 __nla_validate_parse+0x2432/0x2cd0 lib/nlattr.c:625 __nla_parse+0x40/0x50 lib/nlattr.c:710 __nlmsg_parse include/net/netlink.h:745 [inline] nlmsg_parse_deprecated include/net/netlink.h:786 [inline] rtnl_valid_dump_ifinfo_req net/core/rtnetlink.c:2196 [inline] rtnl_dump_ifinfo+0x334/0x1290 net/core/rtnetlink.c:2221 netlink_dump+0x756/0xde0 net/netlink/af_netlink.c:2274 netlink_recvmsg+0x677/0xdf0 net/netlink/af_netlink.c:1986 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg net/socket.c:1068 [inline] ____sys_recvmsg+0x29e/0x5b0 net/socket.c:2814 ___sys_recvmsg+0x1b6/0x510 net/socket.c:2856 __sys_recvmsg net/socket.c:2886 [inline] __do_sys_recvmsg net/socket.c:2896 [inline] __se_sys_recvmsg net/socket.c:2893 [inline] __x64_sys_recvmsg+0x1f2/0x2c0 net/socket.c:2893 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fc89f18ebe9 Code: Unable to access opcode bytes at 0x7fc89f18ebbf. RSP: 002b:00007fc89ff8a038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007fc89f3b6180 RCX: 00007fc89f18ebe9 RDX: 0000000040000002 RSI: 0000200000000e80 RDI: 0000000000000003 RBP: 00007fc89ff8a090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fc89f3b6218 R14: 00007fc89f3b6180 R15: 00007ffc564c7248 syz.0.1955 (12388) used greatest stack depth: 19760 bytes left