audit: type=1400 audit(1580291239.046:36): avc: denied { map } for pid=8291 comm="syz-executor159" path="/root/syz-executor159220597" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 INFO: task syz-executor159:8301 blocked for more than 140 seconds. Not tainted 4.19.99-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor159 D28216 8301 8296 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 hashlimit_mt_check_v1+0x325/0x3ab net/netfilter/xt_hashlimit.c:926 xt_check_match+0x280/0x690 net/netfilter/x_tables.c:506 check_match net/ipv4/netfilter/ip_tables.c:475 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:491 [inline] find_check_entry.isra.0+0x32f/0x920 net/ipv4/netfilter/ip_tables.c:541 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:720 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x2ef/0x492 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1238 tcp_setsockopt net/ipv4/tcp.c:3075 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3069 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3046 __sys_setsockopt+0x17a/0x280 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441c39 Code: 73 75 70 70 6f 72 74 65 64 20 69 6e 20 63 6f 6d 70 61 74 69 62 69 6c 69 74 79 20 6d 6f 64 65 73 20 30 20 74 6f 20 32 20 2d 20 <69> 67 6e 6f 72 65 64 0a 00 00 00 00 00 00 00 72 73 79 73 6c 6f 67 RSP: 002b:00007fffb9cc6ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c39 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029b0 R13: 0000000000402a40 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor159:8302 blocked for more than 140 seconds. Not tainted 4.19.99-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor159 D27648 8302 8294 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 hashlimit_mt_check_v1+0x325/0x3ab net/netfilter/xt_hashlimit.c:926 xt_check_match+0x280/0x690 net/netfilter/x_tables.c:506 check_match net/ipv4/netfilter/ip_tables.c:475 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:491 [inline] find_check_entry.isra.0+0x32f/0x920 net/ipv4/netfilter/ip_tables.c:541 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:720 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x2ef/0x492 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1238 tcp_setsockopt net/ipv4/tcp.c:3075 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3069 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3046 __sys_setsockopt+0x17a/0x280 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441c39 Code: 73 75 70 70 6f 72 74 65 64 20 69 6e 20 63 6f 6d 70 61 74 69 62 69 6c 69 74 79 20 6d 6f 64 65 73 20 30 20 74 6f 20 32 20 2d 20 <69> 67 6e 6f 72 65 64 0a 00 00 00 00 00 00 00 72 73 79 73 6c 6f 67 RSP: 002b:00007fffb9cc6ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c39 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029b0 R13: 0000000000402a40 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor159:8303 blocked for more than 140 seconds. Not tainted 4.19.99-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor159 D28216 8303 8292 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 hashlimit_mt_check_v1+0x325/0x3ab net/netfilter/xt_hashlimit.c:926 xt_check_match+0x280/0x690 net/netfilter/x_tables.c:506 check_match net/ipv4/netfilter/ip_tables.c:475 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:491 [inline] find_check_entry.isra.0+0x32f/0x920 net/ipv4/netfilter/ip_tables.c:541 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:720 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x2ef/0x492 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1238 tcp_setsockopt net/ipv4/tcp.c:3075 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3069 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3046 __sys_setsockopt+0x17a/0x280 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441c39 Code: 73 75 70 70 6f 72 74 65 64 20 69 6e 20 63 6f 6d 70 61 74 69 62 69 6c 69 74 79 20 6d 6f 64 65 73 20 30 20 74 6f 20 32 20 2d 20 <69> 67 6e 6f 72 65 64 0a 00 00 00 00 00 00 00 72 73 79 73 6c 6f 67 RSP: 002b:00007fffb9cc6ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c39 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029b0 R13: 0000000000402a40 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1080: #0: 0000000026f11888 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 4 locks held by rs:main Q:Reg/8141: #0: 00000000536d6d92 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1817 [inline] #0: 00000000536d6d92 (&rq->lock){-.-.}, at: __schedule+0x1f8/0x1dc0 kernel/sched/core.c:3453 #1: 0000000075356a4e (sb_writers#4){.+.+}, at: file_start_write include/linux/fs.h:2775 [inline] #1: 0000000075356a4e (sb_writers#4){.+.+}, at: vfs_write+0x429/0x560 fs/read_write.c:548 #2: 0000000026f11888 (rcu_read_lock){....}, at: inode_trylock include/linux/fs.h:767 [inline] #2: 0000000026f11888 (rcu_read_lock){....}, at: ext4_file_write_iter+0x23f/0x1060 fs/ext4/file.c:236 #3: 000000003965aa3d (&(&dentry->d_lockref.lock)->rlock){+.+.}, at: current_kernel_time64 include/linux/timekeeping.h:277 [inline] #3: 000000003965aa3d (&(&dentry->d_lockref.lock)->rlock){+.+.}, at: current_time+0x6f/0x140 fs/inode.c:2161 1 lock held by rsyslogd/8143: #0: 00000000cca571f6 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:767 2 locks held by getty/8265: #0: 000000002c17cf13 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000005d0ff8ed (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8266: #0: 0000000056c67ad1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000a6c8abc6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8267: #0: 0000000024d05421 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000ffa30c7e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8268: #0: 000000008c4dc17b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000596f4a2f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8269: #0: 000000006c67714a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000049c9ca20 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8270: #0: 000000000939edd0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000683642bf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8271: #0: 000000000b9f17ed (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000007109a79c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 1 lock held by syz-executor159/8298: #0: 000000003ac65f1d (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 1 lock held by syz-executor159/8300: 1 lock held by syz-executor159/8301: #0: 000000003ac65f1d (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 1 lock held by syz-executor159/8302: #0: 000000003ac65f1d (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 1 lock held by syz-executor159/8303: #0: 000000003ac65f1d (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 1 lock held by syz-executor159/8304: #0: 000000003ac65f1d (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1080 Comm: khungtaskd Not tainted 4.19.99-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+0x197/0x210 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x354/0x420 kernel/kthread.c:246 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: 8300 Comm: syz-executor159 Not tainted 4.19.99-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mark_held_locks+0x68/0x100 kernel/locking/lockdep.c:2798 Code: 86 78 08 00 00 85 c0 7e 7a 44 8d 24 b5 00 00 00 00 31 db 49 bf 00 00 00 00 00 fc ff df 41 8d 44 24 03 45 8d 6c 24 02 89 45 d4 <4d> 8d a6 80 08 00 00 48 63 c3 48 8d 04 80 49 8d 34 c4 48 8d 7e 22 RSP: 0018:ffff8880877c7700 EFLAGS: 00000046 RAX: 0000000000000007 RBX: 0000000000000000 RCX: 1ffff11011d2f924 RDX: 1ffff11011d2f91f RSI: 0000000000000001 RDI: ffff88808e97c8f8 RBP: ffff8880877c7738 R08: ffff88808e97c080 R09: ffff88808e97c920 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 R13: 0000000000000006 R14: ffff88808e97c080 R15: dffffc0000000000 FS: 000000000133d880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000000a132d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __trace_hardirqs_on_caller kernel/locking/lockdep.c:2834 [inline] lockdep_hardirqs_on+0x415/0x5d0 kernel/locking/lockdep.c:2879 trace_hardirqs_on+0x67/0x220 kernel/trace/trace_preemptirq.c:30 __local_bh_enable_ip+0x15a/0x270 kernel/softirq.c:194 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x31/0x40 kernel/locking/spinlock.c:200 spin_unlock_bh include/linux/spinlock.h:374 [inline] htable_selective_cleanup+0x219/0x330 net/netfilter/xt_hashlimit.c:381 htable_destroy net/netfilter/xt_hashlimit.c:416 [inline] htable_put+0x176/0x220 net/netfilter/xt_hashlimit.c:443 hashlimit_mt_destroy_v1+0x50/0x70 net/netfilter/xt_hashlimit.c:972 cleanup_match+0xde/0x170 net/ipv6/netfilter/ip6_tables.c:481 find_check_entry.isra.0+0x454/0x920 net/ipv4/netfilter/ip_tables.c:567 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:720 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x2ef/0x492 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1238 tcp_setsockopt net/ipv4/tcp.c:3075 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3069 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3046 __sys_setsockopt+0x17a/0x280 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441c39 Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fffb9cc6ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c39 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029b0 R13: 0000000000402a40 R14: 0000000000000000 R15: 0000000000000000