====================================================== WARNING: possible circular locking dependency detected 5.0.0-rc6+ #69 Not tainted ------------------------------------------------------ syz-executor.0/22479 is trying to acquire lock: 00000000ca6822f5 (&sig->cred_guard_mutex){+.+.}, at: do_io_accounting+0x1f4/0x830 fs/proc/base.c:2711 but task is already holding lock: 000000004a1345a8 (&p->lock){+.+.}, at: seq_read+0x71/0x1130 fs/seq_file.c:161 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&p->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 seq_read+0x71/0x1130 fs/seq_file.c:161 proc_reg_read+0x1fa/0x2c0 fs/proc/inode.c:229 do_loop_readv_writev fs/read_write.c:700 [inline] do_loop_readv_writev fs/read_write.c:687 [inline] do_iter_read+0x4a9/0x660 fs/read_write.c:921 vfs_readv+0xf0/0x160 fs/read_write.c:983 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x475/0x890 fs/splice.c:417 do_splice_to+0x12a/0x190 fs/splice.c:880 do_splice+0xf7c/0x1330 fs/splice.c:1178 __do_sys_splice fs/splice.c:1419 [inline] __se_sys_splice fs/splice.c:1399 [inline] __x64_sys_splice+0x2c6/0x330 fs/splice.c:1399 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&pipe->mutex/1){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 __pipe_lock fs/pipe.c:83 [inline] fifo_open+0x159/0xb00 fs/pipe.c:905 do_dentry_open+0x47d/0x1130 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x10d7/0x4690 fs/namei.c:3534 do_filp_open+0x1a1/0x280 fs/namei.c:3564 do_open_execat+0x13b/0x6d0 fs/exec.c:856 __do_execve_file.isra.0+0x178d/0x23f0 fs/exec.c:1758 do_execveat_common fs/exec.c:1865 [inline] do_execve fs/exec.c:1882 [inline] __do_sys_execve fs/exec.c:1963 [inline] __se_sys_execve fs/exec.c:1958 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1958 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&sig->cred_guard_mutex){+.+.}: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072 mutex_lock_killable_nested+0x16/0x20 kernel/locking/mutex.c:1102 do_io_accounting+0x1f4/0x830 fs/proc/base.c:2711 proc_tgid_io_accounting+0x23/0x30 fs/proc/base.c:2760 proc_single_show+0xf6/0x180 fs/proc/base.c:739 seq_read+0x4db/0x1130 fs/seq_file.c:229 __vfs_read+0x116/0x8c0 fs/read_write.c:416 vfs_read+0x194/0x3e0 fs/read_write.c:452 ksys_pread64+0x183/0x1c0 fs/read_write.c:626 __do_sys_pread64 fs/read_write.c:636 [inline] __se_sys_pread64 fs/read_write.c:633 [inline] __x64_sys_pread64+0x97/0xf0 fs/read_write.c:633 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &sig->cred_guard_mutex --> &pipe->mutex/1 --> &p->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&p->lock); lock(&pipe->mutex/1); lock(&p->lock); lock(&sig->cred_guard_mutex); *** DEADLOCK *** 1 lock held by syz-executor.0/22479: #0: 000000004a1345a8 (&p->lock){+.+.}, at: seq_read+0x71/0x1130 fs/seq_file.c:161 stack backtrace: CPU: 0 PID: 22479 Comm: syz-executor.0 Not tainted 5.0.0-rc6+ #69 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+0x172/0x1f0 lib/dump_stack.c:113 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1224 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2350 [inline] __lock_acquire+0x2f00/0x4700 kernel/locking/lockdep.c:3338 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072 mutex_lock_killable_nested+0x16/0x20 kernel/locking/mutex.c:1102 do_io_accounting+0x1f4/0x830 fs/proc/base.c:2711 kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env proc_tgid_io_accounting+0x23/0x30 fs/proc/base.c:2760 kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' proc_single_show+0xf6/0x180 fs/proc/base.c:739 seq_read+0x4db/0x1130 fs/seq_file.c:229 __vfs_read+0x116/0x8c0 fs/read_write.c:416 vfs_read+0x194/0x3e0 fs/read_write.c:452 ksys_pread64+0x183/0x1c0 fs/read_write.c:626 __do_sys_pread64 fs/read_write.c:636 [inline] __se_sys_pread64 fs/read_write.c:633 [inline] __x64_sys_pread64+0x97/0xf0 fs/read_write.c:633 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e39 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3764d47c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457e39 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3764d486d4 R13: 00000000004c494c R14: 00000000004d8178 R15: 00000000ffffffff kobject: 'loop2' (000000001a8e4234): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000009bce7785): kobject_uevent_env kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000009bce7785): kobject_uevent_env kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000001a8e4234): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000009bce7785): kobject_uevent_env kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000009bce7785): kobject_uevent_env kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000009bce7785): kobject_uevent_env kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000001a8e4234): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop2' (000000001a8e4234): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (000000009bce7785): kobject_uevent_env kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (000000001a8e4234): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000009bce7785): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000009bce7785): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop2' (000000001a8e4234): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop2' (000000001a8e4234): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000001a8e4234): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env audit: type=1804 audit(1550025008.691:112): pid=23386 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir485652438/syzkaller.QTPQdJ/153/file0" dev="sda1" ino=17082 res=1 Process accounting resumed kobject: 'loop0' (000000009bce7785): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' audit: type=1804 audit(1550025008.691:113): pid=23386 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir485652438/syzkaller.QTPQdJ/153/file0" dev="sda1" ino=17082 res=1 Process accounting resumed kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env Process accounting resumed kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' audit: type=1804 audit(1550025008.801:114): pid=23453 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir485652438/syzkaller.QTPQdJ/153/file0" dev="sda1" ino=17082 res=1 kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' Process accounting resumed audit: type=1804 audit(1550025008.801:115): pid=23386 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir485652438/syzkaller.QTPQdJ/153/file0" dev="sda1" ino=17082 res=1 kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop2' (000000001a8e4234): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env Process accounting resumed kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' audit: type=1804 audit(1550025009.081:116): pid=23467 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir485652438/syzkaller.QTPQdJ/154/file0" dev="sda1" ino=17090 res=1 kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env Process accounting resumed kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env kobject: 'loop4' (00000000837752f4): kobject_uevent_env audit: type=1804 audit(1550025009.081:117): pid=23467 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir485652438/syzkaller.QTPQdJ/154/file0" dev="sda1" ino=17090 res=1 kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' Process accounting resumed kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'kvm' (000000002ae5cb39): kobject_uevent_env audit: type=1804 audit(1550025009.351:118): pid=23477 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir485652438/syzkaller.QTPQdJ/155/file0" dev="sda1" ino=17080 res=1 kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (000000002ae5cb39): fill_kobj_path: path = '/devices/virtual/misc/kvm' Process accounting resumed audit: type=1804 audit(1550025009.351:119): pid=23477 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir485652438/syzkaller.QTPQdJ/155/file0" dev="sda1" ino=17080 res=1 kobject: 'loop0' (000000009bce7785): kobject_uevent_env Process accounting resumed audit: type=1804 audit(1550025009.591:120): pid=23484 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir485652438/syzkaller.QTPQdJ/156/file0" dev="sda1" ino=17084 res=1 kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000b6fbed59): kobject_uevent_env kobject: 'loop3' (00000000b6fbed59): fill_kobj_path: path = '/devices/virtual/block/loop3' audit: type=1804 audit(1550025009.591:121): pid=23484 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir485652438/syzkaller.QTPQdJ/156/file0" dev="sda1" ino=17084 res=1 kobject: 'loop5' (00000000407fe205): kobject_uevent_env kobject: 'loop5' (00000000407fe205): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000009bce7785): kobject_uevent_env kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (000000001a8e4234): kobject_uevent_env kobject: 'loop2' (000000001a8e4234): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (0000000000510308): kobject_uevent_env kobject: 'loop1' (0000000000510308): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'batman_adv' (00000000b0c84717): kobject_uevent_env kobject: 'batman_adv' (00000000b0c84717): kobject_uevent_env: filter function caused the event to drop! kobject: 'batman_adv' (00000000b0c84717): kobject_cleanup, parent (null) kobject: 'batman_adv' (00000000b0c84717): calling ktype release kobject: (00000000b0c84717): dynamic_kobj_release kobject: 'batman_adv': free name kobject: 'rx-0' (000000004bc35dd1): kobject_cleanup, parent 0000000033fd4110 kobject: 'rx-0' (000000004bc35dd1): auto cleanup 'remove' event kobject: 'rx-0' (000000004bc35dd1): kobject_uevent_env kobject: 'rx-0' (000000004bc35dd1): fill_kobj_path: path = '/devices/virtual/net/syz_tun/queues/rx-0' kobject: 'rx-0' (000000004bc35dd1): auto cleanup kobject_del kobject: 'rx-0' (000000004bc35dd1): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (0000000004c25654): kobject_cleanup, parent 0000000033fd4110 kobject: 'tx-0' (0000000004c25654): auto cleanup 'remove' event kobject: 'tx-0' (0000000004c25654): kobject_uevent_env kobject: 'tx-0' (0000000004c25654): fill_kobj_path: path = '/devices/virtual/net/syz_tun/queues/tx-0' kobject: 'tx-0' (0000000004c25654): auto cleanup kobject_del kobject: 'tx-0' (0000000004c25654): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (0000000033fd4110): kobject_cleanup, parent (null) kobject: 'queues' (0000000033fd4110): calling ktype release kobject: 'queues' (0000000033fd4110): kset_release kobject: 'queues': free name kobject: 'syz_tun' (00000000ce9dc660): kobject_uevent_env kobject: 'syz_tun' (00000000ce9dc660): fill_kobj_path: path = '/devices/virtual/net/syz_tun' kobject: 'syz_tun' (00000000ce9dc660): kobject_cleanup, parent (null) kobject: 'syz_tun' (00000000ce9dc660): calling ktype release kobject: 'syz_tun': free name kobject: 'loop4' (00000000837752f4): kobject_uevent_env kobject: 'loop4' (00000000837752f4): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000009bce7785): kobject_uevent_env kobject: 'loop0' (000000009bce7785): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'rx-0' (000000004db4a7ca): kobject_cleanup, parent 00000000f35d94c5 kobject: 'rx-0' (000000004db4a7ca): auto cleanup 'remove' event kobject: 'rx-0' (000000004db4a7ca): kobject_uevent_env kobject: 'rx-0' (000000004db4a7ca): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (000000004db4a7ca): auto cleanup kobject_del kobject: 'rx-0' (000000004db4a7ca): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (000000002c9bfb5c): kobject_cleanup, parent 00000000f35d94c5 kobject: 'tx-0' (000000002c9bfb5c): auto cleanup 'remove' event kobject: 'tx-0' (000000002c9bfb5c): kobject_uevent_env kobject: 'tx-0' (000000002c9bfb5c): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (000000002c9bfb5c): auto cleanup kobject_del kobject: 'tx-0' (000000002c9bfb5c): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (00000000f35d94c5): kobject_cleanup, parent (null) kobject: 'queues' (00000000f35d94c5): calling ktype release kobject: 'queues' (00000000f35d94c5): kset_release kobject: 'queues': free name kobject: 'ip6gre0' (000000003b351ef1): kobject_uevent_env kobject: 'ip6gre0' (000000003b351ef1): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'batman_adv' (00000000bed56450): kobject_uevent_env kobject: 'batman_adv' (00000000bed56450): kobject_uevent_env: filter function caused the event to drop! kobject: 'batman_adv' (00000000bed56450): kobject_cleanup, parent (null) kobject: 'batman_adv' (00000000bed56450): calling ktype release kobject: (00000000bed56450): dynamic_kobj_release kobject: 'batman_adv': free name kobject: 'rx-0' (00000000e0cfcae8): kobject_cleanup, parent 0000000027fbe66c kobject: 'rx-0' (00000000e0cfcae8): auto cleanup 'remove' event kobject: 'rx-0' (00000000e0cfcae8): kobject_uevent_env kobject: 'rx-0' (00000000e0cfcae8): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (00000000e0cfcae8): auto cleanup kobject_del kobject: 'rx-0' (00000000e0cfcae8): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (0000000026a65a79): kobject_cleanup, parent 0000000027fbe66c kobject: 'tx-0' (0000000026a65a79): auto cleanup 'remove' event kobject: 'tx-0' (0000000026a65a79): kobject_uevent_env kobject: 'tx-0' (0000000026a65a79): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (0000000026a65a79): auto cleanup kobject_del kobject: 'tx-0' (0000000026a65a79): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (0000000027fbe66c): kobject_cleanup, parent (null) kobject: 'queues' (0000000027fbe66c): calling ktype release kobject: 'queues' (0000000027fbe66c): kset_release kobject: 'queues': free name kobject: 'ip6gretap0' (0000000058a61cb2): kobject_uevent_env kobject: 'ip6gretap0' (0000000058a61cb2): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'ip6gre0' (000000003b351ef1): kobject_cleanup, parent (null) kobject: 'ip6gre0' (000000003b351ef1): auto cleanup 'remove' event kobject: 'ip6gre0' (000000003b351ef1): kobject_uevent_env kobject: 'ip6gre0' (000000003b351ef1): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'ip6gre0' (000000003b351ef1): calling ktype release kobject: 'ip6gre0': free name kobject: 'ip6gretap0' (0000000058a61cb2): kobject_cleanup, parent (null) kobject: 'ip6gretap0' (0000000058a61cb2): auto cleanup 'remove' event kobject: 'ip6gretap0' (0000000058a61cb2): kobject_uevent_env kobject: 'ip6gretap0' (0000000058a61cb2): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'ip6gretap0' (0000000058a61cb2): calling ktype release kobject: 'ip6gretap0': free name kobject: 'rx-0' (0000000043327697): kobject_cleanup, parent 000000007df8f8f0 kobject: 'rx-0' (0000000043327697): auto cleanup 'remove' event kobject: 'rx-0' (0000000043327697): kobject_uevent_env kobject: 'rx-0' (0000000043327697): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (0000000043327697): auto cleanup kobject_del kobject: 'rx-0' (0000000043327697): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (0000000008835a16): kobject_cleanup, parent 000000007df8f8f0 kobject: 'tx-0' (0000000008835a16): auto cleanup 'remove' event kobject: 'tx-0' (0000000008835a16): kobject_uevent_env kobject: 'tx-0' (0000000008835a16): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (0000000008835a16): auto cleanup kobject_del kobject: 'tx-0' (0000000008835a16): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (000000007df8f8f0): kobject_cleanup, parent (null) kobject: 'queues' (000000007df8f8f0): calling ktype release kobject: 'queues' (000000007df8f8f0): kset_release kobject: 'queues': free name kobject: 'ip6tnl0' (00000000e634263e): kobject_uevent_env kobject: 'ip6tnl0' (00000000e634263e): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'ip6tnl0' (00000000e634263e): kobject_cleanup, parent (null) kobject: 'ip6tnl0' (00000000e634263e): auto cleanup 'remove' event kobject: 'ip6tnl0' (00000000e634263e): kobject_uevent_env kobject: 'ip6tnl0' (00000000e634263e): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'ip6tnl0' (00000000e634263e): calling ktype release kobject: 'ip6tnl0': free name kobject: 'rx-0' (000000009803faf7): kobject_cleanup, parent 00000000b94cbc76 kobject: 'rx-0' (000000009803faf7): auto cleanup 'remove' event kobject: 'rx-0' (000000009803faf7): kobject_uevent_env kobject: 'rx-0' (000000009803faf7): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (000000009803faf7): auto cleanup kobject_del kobject: 'rx-0' (000000009803faf7): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (000000005ba7cb14): kobject_cleanup, parent 00000000b94cbc76 kobject: 'tx-0' (000000005ba7cb14): auto cleanup 'remove' event kobject: 'tx-0' (000000005ba7cb14): kobject_uevent_env kobject: 'tx-0' (000000005ba7cb14): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (000000005ba7cb14): auto cleanup kobject_del kobject: 'tx-0' (000000005ba7cb14): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (00000000b94cbc76): kobject_cleanup, parent (null) kobject: 'queues' (00000000b94cbc76): calling ktype release kobject: 'queues' (00000000b94cbc76): kset_release kobject: 'queues': free name kobject: 'sit0' (0000000003a4f669): kobject_uevent_env kobject: 'sit0' (0000000003a4f669): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'sit0' (0000000003a4f669): kobject_cleanup, parent (null) kobject: 'sit0' (0000000003a4f669): auto cleanup 'remove' event kobject: 'sit0' (0000000003a4f669): kobject_uevent_env kobject: 'sit0' (0000000003a4f669): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'sit0' (0000000003a4f669): calling ktype release kobject: 'sit0': free name kobject: 'rx-0' (00000000adc89045): kobject_cleanup, parent 000000004851e1b5 kobject: 'rx-0' (00000000adc89045): auto cleanup 'remove' event kobject: 'rx-0' (00000000adc89045): kobject_uevent_env kobject: 'rx-0' (00000000adc89045): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (00000000adc89045): auto cleanup kobject_del kobject: 'rx-0' (00000000adc89045): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (000000003aafa1b3): kobject_cleanup, parent 000000004851e1b5 kobject: 'tx-0' (000000003aafa1b3): auto cleanup 'remove' event kobject: 'tx-0' (000000003aafa1b3): kobject_uevent_env kobject: 'tx-0' (000000003aafa1b3): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (000000003aafa1b3): auto cleanup kobject_del kobject: 'tx-0' (000000003aafa1b3): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (000000004851e1b5): kobject_cleanup, parent (null) kobject: 'queues' (000000004851e1b5): calling ktype release kobject: 'queues' (000000004851e1b5): kset_release kobject: 'queues': free name kobject: 'ip6_vti0' (000000004fa8122f): kobject_uevent_env kobject: 'ip6_vti0' (000000004fa8122f): kobject_uevent_env: uevent_suppress caused the event to drop! IPVS: ftp: loaded support on port[0] = 21 kobject: 'lo' (00000000617ff72a): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'lo' (00000000617ff72a): kobject_uevent_env kobject: 'lo' (00000000617ff72a): fill_kobj_path: path = '/devices/virtual/net/lo' kobject: 'queues' (00000000c654d1cf): kobject_add_internal: parent: 'lo', set: '' kobject: 'queues' (00000000c654d1cf): kobject_uevent_env kobject: 'queues' (00000000c654d1cf): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (000000000f86f5f3): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (000000000f86f5f3): kobject_uevent_env kobject: 'rx-0' (000000000f86f5f3): fill_kobj_path: path = '/devices/virtual/net/lo/queues/rx-0' kobject: 'tx-0' (000000001045b020): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (000000001045b020): kobject_uevent_env kobject: 'tx-0' (000000001045b020): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0' kobject: 'ip6_vti0' (000000004fa8122f): kobject_cleanup, parent (null) kobject: 'tunl0' (00000000ffc2b3f1): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'ip6_vti0' (000000004fa8122f): auto cleanup 'remove' event kobject: 'tunl0' (00000000ffc2b3f1): kobject_uevent_env kobject: 'ip6_vti0' (000000004fa8122f): kobject_uevent_env kobject: 'tunl0' (00000000ffc2b3f1): fill_kobj_path: path = '/devices/virtual/net/tunl0' kobject: 'queues' (0000000031ee7612): kobject_add_internal: parent: 'tunl0', set: '' kobject: 'ip6_vti0' (000000004fa8122f): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'queues' (0000000031ee7612): kobject_uevent_env kobject: 'ip6_vti0' (000000004fa8122f): calling ktype release kobject: 'queues' (0000000031ee7612): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (000000000efd113c): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (000000000efd113c): kobject_uevent_env kobject: 'ip6_vti0': free name kobject: 'rx-0' (000000000efd113c): fill_kobj_path: path = '/devices/virtual/net/tunl0/queues/rx-0' kobject: 'tx-0' (00000000d1a634d8): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000d1a634d8): kobject_uevent_env kobject: 'tx-0' (00000000d1a634d8): fill_kobj_path: path = '/devices/virtual/net/tunl0/queues/tx-0' kobject: 'gre0' (00000000fc0e46f5): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'gre0' (00000000fc0e46f5): kobject_uevent_env kobject: 'gre0' (00000000fc0e46f5): fill_kobj_path: path = '/devices/virtual/net/gre0' kobject: 'queues' (0000000042d1959a): kobject_add_internal: parent: 'gre0', set: '' kobject: 'queues' (0000000042d1959a): kobject_uevent_env kobject: 'queues' (0000000042d1959a): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (000000002b839327): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (000000002b839327): kobject_uevent_env kobject: 'rx-0' (000000002b839327): fill_kobj_path: path = '/devices/virtual/net/gre0/queues/rx-0' kobject: 'tx-0' (000000004f9bc7c1): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (000000004f9bc7c1): kobject_uevent_env kobject: 'tx-0' (000000004f9bc7c1): fill_kobj_path: path = '/devices/virtual/net/gre0/queues/tx-0'