netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.1'. INFO: task syz-executor.2:10936 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D24776 10936 8183 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 inode_lock_shared include/linux/fs.h:758 [inline] lookup_slow fs/namei.c:1688 [inline] walk_component+0x798/0xda0 fs/namei.c:1811 lookup_last fs/namei.c:2274 [inline] path_lookupat+0x1ff/0x8d0 fs/namei.c:2319 filename_lookup+0x1ac/0x5a0 fs/namei.c:2349 user_path include/linux/namei.h:62 [inline] do_mount+0x147/0x2f50 fs/namespace.c:2762 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f414378e639 Code: Bad RIP value. RSP: 002b:00007f4141d01168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f41438aef80 RCX: 00007f414378e639 RDX: 0000000020000c00 RSI: 0000000020000740 RDI: 0000000000000000 RBP: 00007f41437e9ae9 R08: 00000000200010c0 R09: 0000000000000000 R10: 0000000002044404 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd3ac49b9f R14: 00007f4141d01300 R15: 0000000000022000 INFO: task syz-executor.0:10996 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D29336 10996 8141 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 inode_lock_shared include/linux/fs.h:758 [inline] lookup_slow fs/namei.c:1688 [inline] walk_component+0x798/0xda0 fs/namei.c:1811 lookup_last fs/namei.c:2274 [inline] path_lookupat+0x1ff/0x8d0 fs/namei.c:2319 filename_lookup+0x1ac/0x5a0 fs/namei.c:2349 user_path include/linux/namei.h:62 [inline] do_mount+0x147/0x2f50 fs/namespace.c:2762 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fada3bbc639 Code: Bad RIP value. RSP: 002b:00007fada210e168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fada3cdd050 RCX: 00007fada3bbc639 RDX: 0000000020000c00 RSI: 0000000020000740 RDI: 0000000000000000 RBP: 00007fada3c17ae9 R08: 00000000200010c0 R09: 0000000000000000 R10: 0000000002044404 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd8f99c23f R14: 00007fada210e300 R15: 0000000000022000 Showing all locks held in the system: netlink: 8 bytes leftover after parsing attributes in process `syz-executor.1'. 3 locks held by kworker/u4:3/173: 1 lock held by khungtaskd/1526: #0: 00000000aebec1ba (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7805: 1 lock held by syz-executor.2/10936: #0: 000000001b4902c4 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 000000001b4902c4 (&type->i_mutex_dir_key#8){++++}, at: lookup_slow fs/namei.c:1688 [inline] #0: 000000001b4902c4 (&type->i_mutex_dir_key#8){++++}, at: walk_component+0x798/0xda0 fs/namei.c:1811 4 locks held by syz-executor.2/10946: 6 locks held by syz-executor.0/10986: 1 lock held by syz-executor.0/10996: #0: 00000000d7f528b8 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000d7f528b8 (&type->i_mutex_dir_key#8){++++}, at: lookup_slow fs/namei.c:1688 [inline] #0: 00000000d7f528b8 (&type->i_mutex_dir_key#8){++++}, at: walk_component+0x798/0xda0 fs/namei.c:1811 6 locks held by syz-executor.4/12129: 2 locks held by syz-executor.1/12715: #0: 00000000117217f6 (&sb->s_type->i_mutex_key#13){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #0: 00000000117217f6 (&sb->s_type->i_mutex_key#13){+.+.}, at: __sock_release+0x86/0x2a0 net/socket.c:598 #1: 0000000068358867 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #1: 0000000068358867 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 1 lock held by syz-executor.1/12722: 1 lock held by syz-executor.4/12724: #0: 00000000754a747f (rtnl_mutex){+.+.}, at: tun_detach drivers/net/tun.c:759 [inline] #0: 00000000754a747f (rtnl_mutex){+.+.}, at: tun_chr_close+0x3a/0x180 drivers/net/tun.c:3323 2 locks held by syz-executor.0/12740: 2 locks held by syz-executor.3/12741: 3 locks held by syz-executor.2/12742: 3 locks held by syz-executor.5/12743: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1526 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 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+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 12129 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:preempt_latency_stop kernel/sched/core.c:3252 [inline] RIP: 0010:preempt_count_sub+0x53/0x150 kernel/sched/core.c:3272 Code: 84 d2 0f 85 ef 00 00 00 8b 0d 59 ca e2 0b 85 c9 75 18 65 8b 05 3e 72 c0 7e 25 ff ff ff 7f 39 c3 7f 1a 81 fb fe 00 00 00 76 6a <65> 8b 05 26 72 c0 7e f7 db 65 01 1d 1d 72 c0 7e 5b c3 e8 b6 e4 31 RSP: 0018:ffff8880ba006f90 EFLAGS: 00000202 RAX: 0000000000000304 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffff8880ba006f30 RDI: 0000000000000001 RBP: ffff8880ba007e68 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba00712f R11: 0000000000074071 R12: ffff8880ba000000 R13: ffff8880ba007105 R14: ffff8880ba0070d0 R15: ffffffff8bf5fa1c FS: 00007fd5781a7700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f26abdd9145 CR3: 00000000b0138000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0xeee/0x1400 arch/x86/kernel/unwind_orc.c:579 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] kmem_cache_alloc+0x110/0x370 mm/slab.c:3557 rds_tcp_data_recv+0x218/0xc40 net/rds/tcp_recv.c:173 tcp_read_sock+0x262/0x730 net/ipv4/tcp.c:1667 rds_tcp_read_sock net/rds/tcp_recv.c:276 [inline] rds_tcp_data_ready+0x241/0x690 net/rds/tcp_recv.c:325 tcp_data_ready+0x2f9/0x4e0 net/ipv4/tcp_input.c:4718 tcp_data_queue+0xed9/0x4730 net/ipv4/tcp_input.c:4780 tcp_rcv_established+0x87a/0x1ef0 net/ipv4/tcp_input.c:5679 tcp_v6_do_rcv+0xe1e/0x1370 net/ipv6/tcp_ipv6.c:1348 tcp_v6_rcv+0x26b8/0x3990 net/ipv6/tcp_ipv6.c:1577 ip6_input_finish+0x46a/0x17a0 net/ipv6/ip6_input.c:385 NF_HOOK include/linux/netfilter.h:289 [inline] ip6_input+0xcf/0x3c0 net/ipv6/ip6_input.c:428 dst_input include/net/dst.h:461 [inline] ip6_rcv_finish+0x1d9/0x2f0 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:289 [inline] ipv6_rcv+0xf2/0x3f0 net/ipv6/ip6_input.c:273 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 process_backlog+0x241/0x700 net/core/dev.c:5849 napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 __do_softirq+0x265/0x980 kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1092 do_softirq.part.0+0x160/0x1c0 kernel/softirq.c:336 do_softirq kernel/softirq.c:328 [inline] __local_bh_enable_ip+0x20e/0x270 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:721 [inline] ip6_finish_output2+0x11a9/0x2290 net/ipv6/ip6_output.c:121 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] ip6_xmit+0xdbf/0x20a0 net/ipv6/ip6_output.c:313 inet6_csk_xmit+0x2fb/0x5c0 net/ipv6/inet6_connection_sock.c:139 __tcp_transmit_skb+0x1b9c/0x3400 net/ipv4/tcp_output.c:1148 tcp_transmit_skb net/ipv4/tcp_output.c:1164 [inline] tcp_write_xmit+0x989/0x5100 net/ipv4/tcp_output.c:2391 __tcp_push_pending_frames+0xae/0x310 net/ipv4/tcp_output.c:2572 tcp_sendmsg_locked+0x24c3/0x2f60 net/ipv4/tcp.c:1410 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1462 inet_sendmsg+0x132/0x5a0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 __sys_sendto+0x21a/0x320 net/socket.c:1899 __do_sys_sendto net/socket.c:1911 [inline] __se_sys_sendto net/socket.c:1907 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1907 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fd579c34639 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd5781a7168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fd579d54f80 RCX: 00007fd579c34639 RDX: 00000000fffffdef RSI: 0000000020000200 RDI: 0000000000000006 RBP: 00007fd579c8fae9 R08: 0000000000000000 R09: 00000000000001f4 R10: 000000000004d87a R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffca7794cdf R14: 00007fd5781a7300 R15: 0000000000022000