binder: undelivered TRANSACTION_ERROR: 29201
general protection fault: 0000 [#1] PREEMPT SMP KASAN
kobject: 'loop2' (000000002c6d671c): kobject_uevent_env
CPU: 0 PID: 10273 Comm: syz-executor5 Not tainted 4.20.0-rc1-next-20181107+ #107
kobject: 'loop0' (00000000cd71149a): kobject_uevent_env
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:loop_validate_file+0x247/0x470 drivers/block/loop.c:663
Code: 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 2e 02 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 b8 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 03 02 00 00 4d 8b a4 24 b8 01 00 00 4c 89 e0 48
RSP: 0018:ffff8801811778f8 EFLAGS: 00010202
RAX: 0000000000000037 RBX: dffffc0000000000 RCX: ffffc9000f6f7000
RDX: 000000000000007e RSI: ffffffff845401a7 RDI: 00000000000001b8
RBP: ffff880181177918 R08: ffff880185a385c0 R09: ffffed003b5c5b67
R10: 0000000000000002 R11: ffff8801dae2db3b R12: 0000000000000000
R13: ffff8801c46f35c0 R14: 0000000000000002 R15: ffff8801c46f35c0
FS:  00007fd72b1e0700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
kobject: 'loop2' (000000002c6d671c): fill_kobj_path: path = '/devices/virtual/block/loop2'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000072c000 CR3: 00000001be56e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kobject: 'loop0' (00000000cd71149a): fill_kobj_path: path = '/devices/virtual/block/loop0'
Call Trace:
 loop_set_fd drivers/block/loop.c:925 [inline]
 lo_ioctl+0x55c/0x1d60 drivers/block/loop.c:1408
binder: undelivered TRANSACTION_ERROR: 29189
 __blkdev_driver_ioctl block/ioctl.c:303 [inline]
 blkdev_ioctl+0x98e/0x21b0 block/ioctl.c:605
binder: undelivered TRANSACTION_ERROR: 29189
binder: 10270:10274 BC_FREE_BUFFER u0000000000000000 no match
 block_ioctl+0xee/0x130 fs/block_dev.c:1883
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696
kobject: 'loop3' (000000005b4ad2c7): kobject_uevent_env
kobject: 'loop3' (000000005b4ad2c7): fill_kobj_path: path = '/devices/virtual/block/loop3'
binder: 10270:10274 unknown command 2818304
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
kobject: 'loop0' (00000000cd71149a): kobject_uevent_env
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
binder: 10270:10274 ioctl c0306201 20000140 returned -22
kobject: 'loop0' (00000000cd71149a): fill_kobj_path: path = '/devices/virtual/block/loop0'
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
kobject: 'loop0' (00000000cd71149a): kobject_uevent_env
Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd72b1dfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000006 RSI: 0000000000004c00 RDI: 0000000000000005
kobject: 'loop0' (00000000cd71149a): fill_kobj_path: path = '/devices/virtual/block/loop0'
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd72b1e06d4
R13: 00000000004c06c0 R14: 00000000004d0af0 R15: 00000000ffffffff
Modules linked in:
binder: 10270:10274 Acquire 1 refcount change on invalid ref 4 ret -22
EXT4-fs (loop0): invalid inodes per group: 8192

binder: 10270:10274 BC_FREE_BUFFER u0000000000000000 no match
---[ end trace 23e88456827e3867 ]---
binder: 10270:10274 unknown command 2818304
RIP: 0010:loop_validate_file+0x247/0x470 drivers/block/loop.c:663
binder: 10270:10274 ioctl c0306201 20000140 returned -22
Code: 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 2e 02 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 b8 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 03 02 00 00 4d 8b a4 24 b8 01 00 00 4c 89 e0 48
binder: 10309:10310 Acquire 1 refcount change on invalid ref 4 ret -22
kobject: 'loop0' (00000000cd71149a): kobject_uevent_env
binder: 10309:10310 BC_FREE_BUFFER u0000000000000000 no match
binder: undelivered TRANSACTION_ERROR: 29189
binder: 10309:10310 unknown command 393983620
binder: undelivered TRANSACTION_ERROR: 29189
binder: 10309:10310 ioctl c0306201 20000140 returned -22
kobject: 'loop0' (00000000cd71149a): fill_kobj_path: path = '/devices/virtual/block/loop0'
binder: 10309:10317 Acquire 1 refcount change on invalid ref 4 ret -22
kobject: 'loop1' (00000000afc28a53): kobject_uevent_env
binder: undelivered TRANSACTION_ERROR: 29189
binder: undelivered TRANSACTION_ERROR: 29189
kobject: 'loop1' (00000000afc28a53): fill_kobj_path: path = '/devices/virtual/block/loop1'
binder: 10309:10317 BC_FREE_BUFFER u0000000000000000 no match
kobject: 'loop2' (000000002c6d671c): kobject_uevent_env
kobject: 'loop2' (000000002c6d671c): fill_kobj_path: path = '/devices/virtual/block/loop2'
binder: 10309:10317 unknown command 393983620
RSP: 0018:ffff8801811778f8 EFLAGS: 00010202
kobject: 'loop3' (000000005b4ad2c7): kobject_uevent_env
kobject: 'loop3' (000000005b4ad2c7): fill_kobj_path: path = '/devices/virtual/block/loop3'
binder: 10309:10317 ioctl c0306201 20000140 returned -22
binder: undelivered TRANSACTION_ERROR: 29189
RAX: 0000000000000037 RBX: dffffc0000000000 RCX: ffffc9000f6f7000
RDX: 000000000000007e RSI: ffffffff845401a7 RDI: 00000000000001b8
kobject: 'loop0' (00000000cd71149a): kobject_uevent_env
kobject: 'loop0' (00000000cd71149a): fill_kobj_path: path = '/devices/virtual/block/loop0'
RBP: ffff880181177918 R08: ffff880185a385c0 R09: ffffed003b5c5b67
kobject: 'loop2' (000000002c6d671c): kobject_uevent_env
R10: 0000000000000002 R11: ffff8801dae2db3b R12: 0000000000000000
kobject: 'loop2' (000000002c6d671c): fill_kobj_path: path = '/devices/virtual/block/loop2'
R13: ffff8801c46f35c0 R14: 0000000000000002 R15: ffff8801c46f35c0
kobject: 'loop0' (00000000cd71149a): kobject_uevent_env
FS:  00007fd72b1e0700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc7a9f3dbc CR3: 00000001be56e000 CR4: 00000000001406f0
kobject: 'loop0' (00000000cd71149a): fill_kobj_path: path = '/devices/virtual/block/loop0'
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400