netlink: 'syz-executor.0': attribute type 1 has an invalid length. INFO: task syz-executor.1:10621 blocked for more than 140 seconds. Not tainted 4.19.131-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D24960 10621 6570 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3515 schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 netdev_run_todo+0x719/0xab0 net/core/dev.c:8991 rtnl_unlock net/core/rtnetlink.c:117 [inline] rtnetlink_rcv_msg+0x460/0xb80 net/core/rtnetlink.c:4778 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:632 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2115 __sys_sendmsg net/socket.c:2153 [inline] __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2160 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45cb29 Code: 48 8b 6c 24 20 48 83 c4 28 c3 48 8b 80 c8 00 00 00 48 39 c8 74 e5 48 8b 44 24 30 48 89 04 24 48 8b 44 24 38 48 89 44 24 08 0f 44 24 48 88 44 24 10 0f b6 44 24 49 88 44 24 11 0f b6 44 24 4a RSP: 002b:00007f1ade12fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000005028c0 RCX: 000000000045cb29 RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000006 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a46 R14: 00000000004cd2d3 R15: 00007f1ade1306d4 INFO: task syz-executor.0:10788 blocked for more than 140 seconds. Not tainted 4.19.131-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28952 10788 6442 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3515 schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 rtnl_lock net/core/rtnetlink.c:77 [inline] rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4774 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:632 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2115 __sys_sendmsg net/socket.c:2153 [inline] __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2160 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45cb29 Code: 48 8b 6c 24 20 48 83 c4 28 c3 48 8b 80 c8 00 00 00 48 39 c8 74 e5 48 8b 44 24 30 48 89 04 24 48 8b 44 24 38 48 89 44 24 08 0f 44 24 48 88 44 24 10 0f b6 44 24 49 88 44 24 11 0f b6 44 24 4a RSP: 002b:00007fd7d90cac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000005028c0 RCX: 000000000045cb29 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a46 R14: 00000000004cd2d3 R15: 00007fd7d90cb6d4 INFO: task syz-executor.0:10795 blocked for more than 140 seconds. Not tainted 4.19.131-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28952 10795 6442 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3515 schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 rtnl_lock net/core/rtnetlink.c:77 [inline] rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4774 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:632 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2115 __sys_sendmsg net/socket.c:2153 [inline] __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2160 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45cb29 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd7d90a9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000005028c0 RCX: 000000000045cb29 RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000006 RBP: 000000000078c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a46 R14: 00000000004cd2d3 R15: 00007fd7d90aa6d4 Showing all locks held in the system: 1 lock held by khungtaskd/1076: #0: 00000000aa69604c (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440 3 locks held by kworker/1:2/2930: 1 lock held by systemd-journal/3684: 2 locks held by in:imklog/6141: 1 lock held by syz-executor.1/10621: #0: 00000000e93c2b35 (rtnl_mutex){+.+.}, at: netdev_run_todo+0x719/0xab0 net/core/dev.c:8991 1 lock held by syz-executor.0/10788: #0: 00000000e93c2b35 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000e93c2b35 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4774 1 lock held by syz-executor.0/10795: #0: 00000000e93c2b35 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000e93c2b35 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4774 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1076 Comm: khungtaskd Not tainted 4.19.131-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2fe lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x30b/0x410 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10666 Comm: syz-executor.5 Not tainted 4.19.131-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:193 [inline] RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:2316 [inline] RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:2336 [inline] RIP: 0010:validate_chain kernel/locking/lockdep.c:2390 [inline] RIP: 0010:__lock_acquire+0xbb3/0x3ff0 kernel/locking/lockdep.c:3415 Code: 80 46 86 c8 61 48 b8 00 00 00 00 00 fc ff df 49 0f af cc 48 c1 e9 31 4c 8d 04 cd 80 18 3d 8b 4c 89 c2 48 c1 ea 03 80 3c 02 00 <0f> 85 83 25 00 00 48 8b 1c cd 80 18 3d 8b 48 85 db 74 55 48 83 eb RSP: 0000:ffff8882117678b8 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000457 RDX: 1ffffffff167a767 RSI: 00000000acfec1c5 RDI: 0000000000000000 RBP: ffff888087f02c2a R08: ffffffff8b3d3b38 R09: 0000000000000000 R10: ffff888087f02c08 R11: 0000000000000000 R12: b369cb708827d641 R13: ffff888087f02380 R14: ffff888087f02c20 R15: 0000000000000001 FS: 00007fad7db55700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000028a5b8d0 CR3: 00000001f0dae000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3907 __might_fault mm/memory.c:4638 [inline] __might_fault+0x152/0x1d0 mm/memory.c:4623 __clear_user+0x1e/0x70 arch/x86/lib/usercopy_64.c:19 copy_xregs_to_user arch/x86/include/asm/fpu/internal.h:375 [inline] copy_fpregs_to_sigframe arch/x86/kernel/fpu/signal.c:126 [inline] copy_fpstate_to_sigframe+0x1a1/0x6b0 arch/x86/kernel/fpu/signal.c:177 get_sigframe.constprop.0.isra.0+0x4a6/0x6a0 arch/x86/kernel/signal.c:284 __setup_rt_frame arch/x86/kernel/signal.c:466 [inline] setup_rt_frame arch/x86/kernel/signal.c:711 [inline] handle_signal arch/x86/kernel/signal.c:755 [inline] do_signal+0xa55/0x1670 arch/x86/kernel/signal.c:823 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode+0x277/0x2d0 arch/x86/entry/common.c:198 retint_user+0x8/0x18 RIP: 0033:0x405e49 Code: d0 ff ff ff 01 48 8b 7c 24 28 c7 44 24 34 00 00 00 00 e8 5a ef 01 00 85 c0 75 23 48 6b 44 24 20 18 8b 7c 24 1c 48 03 44 24 38 <48> 8b 48 10 48 8b 50 08 48 8b 30 e8 f7 0a 01 00 89 44 24 34 64 f0 RSP: 002b:00007fad7db54a70 EFLAGS: 00010206 RAX: 0000000028a5b8c0 RBX: 000000000050a6c0 RCX: 0000000000416987 RDX: 1120239bc7d63b87 RSI: 0000000000000000 RDI: 0000000000000008 RBP: 000000000078c0e0 R08: 00007fad7db54a70 R09: 000000000078c0e0 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff R13: 0000000000000c3e R14: 00000000004ce90a R15: 00007fad7db556d4