possible deadlock in lock

possible deadlock in lock_trace
Status: upstream: reported on 2019/04/19 09:51
Reported-by: syzbot+15de275074ca85b268c7@syzkaller.appspotmail.com
First crash: 212d, last: 21d
similar bugs (6):
Kernel	Title	Repro	Count	Last	Reported	Patched	Status
linux-4.19	possible deadlock in lock_trace		3	43d	202d	0/1	upstream: reported on 2019/04/28 18:16
android-49	possible deadlock in lock_trace	C	7327	2h01m	219d	0/3	public: reported C repro on 2019/04/12 00:00
upstream	possible deadlock in lock_trace (2)		3	183d	213d	0/14	auto-closed as invalid on 2019/10/25 08:41
upstream	possible deadlock in lock_trace	C	1847	235d	716d	0/14	closed as dup on 2017/12/12 21:59
android-414	possible deadlock in lock_trace	syz	203	228d	219d	0/1	public: reported syz repro on 2019/04/12 00:01
android-44	possible deadlock in lock_trace	C	35	14h50m	220d	0/2	public: reported C repro on 2019/04/11 08:44
Sample crash report:
audit: type=1800 audit(1555925968.394:178): pid=5618 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op="collect_data" cause="failed" comm="syz-executor.2" name="memory.events" dev="sda1" ino=16636 res=0
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
======================================================
WARNING: possible circular locking dependency detected
4.14.112 #2 Not tainted
------------------------------------------------------
syz-executor.1/5633 is trying to acquire lock:
 (
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
&sig->cred_guard_mutex
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
){+.+.}, at: [<ffffffff81a6c0e4>] lock_trace+0x44/0xc0 fs/proc/base.c:407

but task is already holding lock:
 (&p->lock){+.+.}, at: [<ffffffff81951fd1>] seq_read+0xc1/0x12a0 fs/seq_file.c:165

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&p->lock){+.+.}
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
:
       lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0xe8/0x1470 kernel/locking/mutex.c:893
       mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
CPU: 1 PID: 5629 Comm: syz-executor.3 Not tainted 4.14.112 #2
       seq_read+0xc1/0x12a0 fs/seq_file.c:165
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
       proc_reg_read+0xfd/0x180 fs/proc/inode.c:217
Call Trace:
       do_loop_readv_writev fs/read_write.c:694 [inline]
       do_loop_readv_writev fs/read_write.c:681 [inline]
       do_iter_read+0x3e7/0x5b0 fs/read_write.c:918
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
       vfs_readv+0xd3/0x130 fs/read_write.c:980
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10f/0x159 lib/fault-inject.c:149
       kernel_readv fs/splice.c:361 [inline]
       default_file_splice_read+0x421/0x7b0 fs/splice.c:416
       do_splice_to+0x108/0x170 fs/splice.c:880
 should_failslab+0xdb/0x130 mm/failslab.c:32
       do_splice fs/splice.c:1173 [inline]
       SYSC_splice fs/splice.c:1402 [inline]
       SyS_splice+0xfcb/0x13e0 fs/splice.c:1382
 slab_pre_alloc_hook mm/slab.h:421 [inline]
 slab_alloc_node mm/slab.c:3297 [inline]
 kmem_cache_alloc_node_trace+0x283/0x770 mm/slab.c:3659
       do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
       entry_SYSCALL_64_after_hwframe+0x42/0xb7

-> #3
 __do_kmalloc_node mm/slab.c:3681 [inline]
 __kmalloc_node+0x3d/0x80 mm/slab.c:3689
 (
 kmalloc_node include/linux/slab.h:530 [inline]
 kvmalloc_node+0x4e/0xe0 mm/util.c:397
&pipe->mutex
 kvmalloc include/linux/mm.h:531 [inline]
 kvzalloc include/linux/mm.h:539 [inline]
 netif_alloc_rx_queues net/core/dev.c:7491 [inline]
 alloc_netdev_mqs+0x7ad/0xbc0 net/core/dev.c:8130
/1
 rtnl_create_link+0x1b4/0x850 net/core/rtnetlink.c:2439
){+.+.}:
       lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
 rtnl_newlink+0xdd5/0x1710 net/core/rtnetlink.c:2688
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0xe8/0x1470 kernel/locking/mutex.c:893
       mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
       pipe_lock_nested fs/pipe.c:67 [inline]
       pipe_lock+0x63/0x80 fs/pipe.c:75
       iter_file_splice_write+0x15e/0xae0 fs/splice.c:699
       do_splice_from fs/splice.c:851 [inline]
       do_splice fs/splice.c:1147 [inline]
       SYSC_splice fs/splice.c:1402 [inline]
       SyS_splice+0xd81/0x13e0 fs/splice.c:1382
       do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
       entry_SYSCALL_64_after_hwframe+0x42/0xb7
 rtnetlink_rcv_msg+0x3ed/0xb70 net/core/rtnetlink.c:4285

-> #2
 (
sb_writers
#6){.+.+}
 netlink_rcv_skb+0x152/0x3c0 net/netlink/af_netlink.c:2432
:
       lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
       percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline]
       percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
       __sb_start_write+0x1ae/0x2f0 fs/super.c:1363
       sb_start_write include/linux/fs.h:1545 [inline]
       mnt_want_write+0x3f/0xb0 fs/namespace.c:386
       ovl_want_write+0x76/0xa0 fs/overlayfs/util.c:25
       ovl_create_object+0x79/0x1e0 fs/overlayfs/dir.c:538
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4297
       ovl_create+0x28/0x30 fs/overlayfs/dir.c:563
 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline]
 netlink_unicast+0x466/0x780 net/netlink/af_netlink.c:1312
       lookup_open+0x11b1/0x1870 fs/namei.c:3240
       do_last fs/namei.c:3331 [inline]
       path_openat+0xfca/0x3f70 fs/namei.c:3566
       do_filp_open+0x18e/0x250 fs/namei.c:3600
 netlink_sendmsg+0x7c4/0xc60 net/netlink/af_netlink.c:1877
       do_sys_open+0x2c5/0x430 fs/open.c:1065
       SYSC_open fs/open.c:1083 [inline]
       SyS_open fs/open.c:1078 [inline]
       SYSC_creat fs/open.c:1123 [inline]
       SyS_creat+0x27/0x30 fs/open.c:1121
       do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
       entry_SYSCALL_64_after_hwframe+0x42/0xb7
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xd0/0x110 net/socket.c:656

-> #1
 ___sys_sendmsg+0x70c/0x850 net/socket.c:2062
 (
&ovl_i_mutex_dir_key[depth]){++++}
:
       lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
       down_read+0x3b/0xb0 kernel/locking/rwsem.c:24
       inode_lock_shared include/linux/fs.h:725 [inline]
       do_last fs/namei.c:3330 [inline]
       path_openat+0x191e/0x3f70 fs/namei.c:3566
       do_filp_open+0x18e/0x250 fs/namei.c:3600
       do_open_execat+0xe7/0x4a0 fs/exec.c:849
       do_execveat_common.isra.0+0x6d2/0x1dd0 fs/exec.c:1740
       do_execveat fs/exec.c:1858 [inline]
       SYSC_execveat fs/exec.c:1939 [inline]
       SyS_execveat+0x4f/0x60 fs/exec.c:1931
       do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
       entry_SYSCALL_64_after_hwframe+0x42/0xb7

-> #0
 (
 __sys_sendmsg+0xb9/0x140 net/socket.c:2096
&sig->cred_guard_mutex
){+.+.}:
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2103
       check_prev_add kernel/locking/lockdep.c:1901 [inline]
       check_prevs_add kernel/locking/lockdep.c:2018 [inline]
       validate_chain kernel/locking/lockdep.c:2460 [inline]
       __lock_acquire+0x2c89/0x45e0 kernel/locking/lockdep.c:3487
       lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0xe8/0x1470 kernel/locking/mutex.c:893
       mutex_lock_killable_nested+0x16/0x20 kernel/locking/mutex.c:923
       lock_trace+0x44/0xc0 fs/proc/base.c:407
       proc_pid_syscall+0x8c/0x200 fs/proc/base.c:639
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
       proc_single_show+0xf6/0x160 fs/proc/base.c:761
RIP: 0033:0x458c29
       seq_read+0x52b/0x12a0 fs/seq_file.c:237
       do_loop_readv_writev fs/read_write.c:694 [inline]
       do_loop_readv_writev fs/read_write.c:681 [inline]
       do_iter_read+0x3e7/0x5b0 fs/read_write.c:918
RSP: 002b:00007fbd702eac78 EFLAGS: 00000246
       vfs_readv+0xd3/0x130 fs/read_write.c:980
 ORIG_RAX: 000000000000002e
       do_preadv+0x15d/0x200 fs/read_write.c:1064
RAX: ffffffffffffffda RBX: 00007fbd702eac90 RCX: 0000000000458c29
       SYSC_preadv fs/read_write.c:1114 [inline]
       SyS_preadv+0x31/0x40 fs/read_write.c:1109
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003
       do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
       entry_SYSCALL_64_after_hwframe+0x42/0xb7
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000

other info that might help us debug this:

R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbd702eb6d4
Chain exists of:
  
R13: 00000000004c6516 R14: 00000000004dae80 R15: 0000000000000004
&sig->cred_guard_mutex
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
 --> &pipe->mutex/1 --> &p->lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&p->lock);
                               lock(&pipe->mutex/1);
                               lock(
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
&p->lock
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
);
  lock(&sig->cred_guard_mutex);

 *** DEADLOCK ***

1 lock held by syz-executor.1/5633:
 #0:  (&p->lock){+.+.}, at: [<ffffffff81951fd1>] seq_read+0xc1/0x12a0 fs/seq_file.c:165

stack backtrace:
CPU: 0 PID: 5633 Comm: syz-executor.1 Not tainted 4.14.112 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1258
 check_prev_add kernel/locking/lockdep.c:1901 [inline]
 check_prevs_add kernel/locking/lockdep.c:2018 [inline]
 validate_chain kernel/locking/lockdep.c:2460 [inline]
 __lock_acquire+0x2c89/0x45e0 kernel/locking/lockdep.c:3487
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
 lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
 __mutex_lock_common kernel/locking/mutex.c:756 [inline]
 __mutex_lock+0xe8/0x1470 kernel/locking/mutex.c:893
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
 mutex_lock_killable_nested+0x16/0x20 kernel/locking/mutex.c:923
 lock_trace+0x44/0xc0 fs/proc/base.c:407
 proc_pid_syscall+0x8c/0x200 fs/proc/base.c:639
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
 proc_single_show+0xf6/0x160 fs/proc/base.c:761
 seq_read+0x52b/0x12a0 fs/seq_file.c:237
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
 do_loop_readv_writev fs/read_write.c:694 [inline]
 do_loop_readv_writev fs/read_write.c:681 [inline]
 do_iter_read+0x3e7/0x5b0 fs/read_write.c:918
 vfs_readv+0xd3/0x130 fs/read_write.c:980
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
 do_preadv+0x15d/0x200 fs/read_write.c:1064
 SYSC_preadv fs/read_write.c:1114 [inline]
 SyS_preadv+0x31/0x40 fs/read_write.c:1109
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458c29
RSP: 002b:00007f808cbb9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458c29
RDX: 1000000000000269 RSI: 0000000020000480 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f808cbba6d4
R13: 00000000004c5969 R14: 00000000004d9cc8 R15: 00000000ffffffff
protocol 88fb is buggy, dev hsr_slave_0
kobject: 'loop5' (ffff8880a4b2e2e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b2e2e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
protocol 88fb is buggy, dev hsr_slave_1
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'vlan0' (ffff888061f91830): kobject_add_internal: parent: 'net', set: 'devices'
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'vlan0' (ffff888061f91830): kobject_uevent_env
kobject: 'vlan0' (ffff888061f91830): fill_kobj_path: path = '/devices/virtual/net/vlan0'
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'queues' (ffff8880982a5948): kobject_add_internal: parent: 'vlan0', set: '<NULL>'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'queues' (ffff8880982a5948): kobject_uevent_env
kobject: 'queues' (ffff8880982a5948): kobject_uevent_env: filter function caused the event to drop!
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'rx-0' (ffff8880a603a790): kobject_add_internal: parent: 'queues', set: 'queues'
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'rx-0' (ffff8880a603a790): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b2e2e0): kobject_uevent_env
kobject: 'rx-0' (ffff8880a603a790): fill_kobj_path: path = '/devices/virtual/net/vlan0/queues/rx-0'
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'tx-0' (ffff888065313ad8): kobject_add_internal: parent: 'queues', set: 'queues'
kobject: 'loop5' (ffff8880a4b2e2e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'tx-0' (ffff888065313ad8): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'tx-0' (ffff888065313ad8): fill_kobj_path: path = '/devices/virtual/net/vlan0/queues/tx-0'
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'batman_adv' (ffff888099bf7f00): kobject_add_internal: parent: 'vlan0', set: '<NULL>'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b2e2e0): kobject_uevent_env
kobject: 'batman_adv' (ffff888099bf7f00): kobject_uevent_env
kobject: 'batman_adv' (ffff888099bf7f00): kobject_uevent_env: filter function caused the event to drop!
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'batman_adv' (ffff888099bf7f00): kobject_cleanup, parent           (null)
kobject: 'loop5' (ffff8880a4b2e2e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'batman_adv' (ffff888099bf7f00): calling ktype release
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: (ffff888099bf7f00): dynamic_kobj_release
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'batman_adv': free name
kobject: 'rx-0' (ffff8880a603a790): kobject_cleanup, parent ffff8880982a5948
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'rx-0' (ffff8880a603a790): auto cleanup 'remove' event
kobject: 'rx-0' (ffff8880a603a790): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'rx-0' (ffff8880a603a790): fill_kobj_path: path = '/devices/virtual/net/vlan0/queues/rx-0'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'rx-0' (ffff8880a603a790): auto cleanup kobject_del
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'rx-0' (ffff8880a603a790): calling ktype release
kobject: 'rx-0': free name
kobject: 'loop5' (ffff8880a4b2e2e0): kobject_uevent_env
kobject: 'tx-0' (ffff888065313ad8): kobject_cleanup, parent ffff8880982a5948
kobject: 'loop5' (ffff8880a4b2e2e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'tx-0' (ffff888065313ad8): auto cleanup 'remove' event
kobject: 'tx-0' (ffff888065313ad8): kobject_uevent_env
kobject: 'tx-0' (ffff888065313ad8): fill_kobj_path: path = '/devices/virtual/net/vlan0/queues/tx-0'
kobject: 'tx-0' (ffff888065313ad8): auto cleanup kobject_del
kobject: 'tx-0' (ffff888065313ad8): calling ktype release
kobject: 'tx-0': free name
kobject: 'queues' (ffff8880982a5948): kobject_cleanup, parent           (null)
kobject: 'queues' (ffff8880982a5948): calling ktype release
kobject: 'queues' (ffff8880982a5948): kset_release
kobject: 'queues': free name
kobject: 'vlan0' (ffff888061f91830): kobject_uevent_env
kobject: 'vlan0' (ffff888061f91830): fill_kobj_path: path = '/devices/virtual/net/vlan0'
kobject: 'vlan0' (ffff888061f91830): kobject_cleanup, parent           (null)
kobject: 'vlan0' (ffff888061f91830): calling ktype release
kobject: 'vlan0': free name
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'.
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'.
kobject: 'gre1' (ffff8880691d8db0): kobject_add_internal: parent: 'net', set: 'devices'
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'gre1' (ffff8880691d8db0): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'gre1' (ffff8880691d8db0): fill_kobj_path: path = '/devices/virtual/net/gre1'
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'queues' (ffff88808cf4b648): kobject_add_internal: parent: 'gre1', set: '<NULL>'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'queues' (ffff88808cf4b648): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'queues' (ffff88808cf4b648): kobject_uevent_env: filter function caused the event to drop!
kobject: 'rx-0' (ffff88809c670250): kobject_add_internal: parent: 'queues', set: 'queues'
kobject: 'loop5' (ffff8880a4b2e2e0): kobject_uevent_env
kobject: 'rx-0' (ffff88809c670250): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b2e2e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'rx-0' (ffff88809c670250): fill_kobj_path: path = '/devices/virtual/net/gre1/queues/rx-0'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'tx-0' (ffff88808cf527d8): kobject_add_internal: parent: 'queues', set: 'queues'
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'tx-0' (ffff88808cf527d8): kobject_uevent_env
kobject: 'tx-0' (ffff88808cf527d8): fill_kobj_path: path = '/devices/virtual/net/gre1/queues/tx-0'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (ffff8880a4b2e2e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b2e2e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
net_ratelimit: 14 callbacks suppressed
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=4 sclass=netlink_route_socket pig=5850 comm=syz-executor.3
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (ffff8880a4b2e2e0): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (ffff8880a4b2e2e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (ffff8880a4b2e2e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b2e2e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=4 sclass=netlink_route_socket pig=5870 comm=syz-executor.3
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (ffff8880a4b2e2e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b2e2e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
audit: type=1800 audit(1555925976.384:179): pid=5890 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="vcsa9" dev="sda1" ino=17297 res=0
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
audit: type=1800 audit(1555925976.394:180): pid=5890 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="vcsa9" dev="sda1" ino=17297 res=0
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'.
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'.
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'kvm' (ffff888219ff0510): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (ffff888219ff0510): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (ffff8880a4b2e2e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b2e2e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (ffff8880a4a901e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a901e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (ffff8880a49ed220): kobject_uevent_env
kobject: 'loop1' (ffff8880a49ed220): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (ffff8880a4b2e2e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b2e2e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
Crashes (5):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Maintainers
ci2-linux-4-14	2019/04/19 08:50	linux-4.14.y	58b454eb	b0e8efcb	.config	log	report	adobriyan@gmail.com, akpm@linux-foundation.org, alexander.levin@microsoft.com, gregkh@linuxfoundation.org, jannh@google.com, linux-kernel@vger.kernel.org, mhocko@suse.com, w@1wt.eu
ci2-linux-4-14	2019/10/27 08:16	linux-4.14.y	b98aebd2	25bb509e	.config	log	report	akpm@linux-foundation.org, gregkh@linuxfoundation.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, mhocko@suse.com
ci2-linux-4-14	2019/08/08 23:27	linux-4.14.y	b19ffe6e	bcc419e9	.config	log	report	akpm@linux-foundation.org, gregkh@linuxfoundation.org, hannes@cmpxchg.org, jannh@google.com, keescook@chromium.org, linux-kernel@vger.kernel.org, mhocko@suse.com
ci2-linux-4-14	2019/08/02 14:31	linux-4.14.y	10d6aa56	835dffe7	.config	log	report	akpm@linux-foundation.org, gregkh@linuxfoundation.org, hannes@cmpxchg.org, jannh@google.com, keescook@chromium.org, linux-kernel@vger.kernel.org, mhocko@suse.com
ci2-linux-4-14	2019/07/27 13:30	linux-4.14.y	ff33472c	c85e1c5b	.config	log	report	akpm@linux-foundation.org, gregkh@linuxfoundation.org, hannes@cmpxchg.org, jannh@google.com, keescook@chromium.org, linux-kernel@vger.kernel.org, mhocko@suse.com