input: syz0 as /devices/virtual/input/input973
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
kobject: 'event4' (0000000042b44264): kobject_uevent_env
CPU: 1 PID: 24558 Comm: syz-executor2 Not tainted 4.20.0-rc5+ #368
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:fuse_retrieve fs/fuse/dev.c:1745 [inline]
RIP: 0010:fuse_notify_retrieve fs/fuse/dev.c:1807 [inline]
RIP: 0010:fuse_notify fs/fuse/dev.c:1840 [inline]
RIP: 0010:fuse_dev_do_write+0x1dc2/0x3820 fs/fuse/dev.c:1919
Code: 00 48 c1 e0 2a 80 3c 02 00 0f 85 e9 17 00 00 49 8b 9d 58 01 00 00 b8 ff ff 37 00 48 c1 e0 2a 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 8f
kobject: 'event4' (0000000042b44264): fill_kobj_path: path = '/devices/virtual/input/input973/event4'
RSP: 0018:ffff8881bc2af4b8 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90009e06000
RDX: 0000000000000000 RSI: ffffffff82898673 RDI: 0000000000000004
RBP: ffff8881bc2afa50 R08: ffff8881bb6ac100 R09: ffffed103a557282
R10: ffffed103a557282 R11: ffff8881d2ab9413 R12: 0000000000000000
R13: ffff8881d2ab93f0 R14: 0000000000000000 R15: 0000000000000030
FS:  00007f139e1fd700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004d46f0 CR3: 00000001b8d73000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kobject: 'loop5' (000000002490c08c): kobject_uevent_env
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kobject: 'input974' (00000000a4be01a4): kobject_add_internal: parent: 'input', set: 'devices'
kobject: 'input974' (00000000a4be01a4): kobject_uevent_env
kobject: 'loop5' (000000002490c08c): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'input974' (00000000a4be01a4): fill_kobj_path: path = '/devices/virtual/input/input974'
kobject: 'loop1' (00000000e56d619c): kobject_uevent_env
 fuse_dev_write+0x19a/0x240 fs/fuse/dev.c:2003
kobject: 'loop1' (00000000e56d619c): fill_kobj_path: path = '/devices/virtual/block/loop1'
 call_write_iter include/linux/fs.h:1857 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x6b8/0x9f0 fs/read_write.c:487
kobject: 'loop5' (000000002490c08c): kobject_uevent_env
kobject: 'loop5' (000000002490c08c): fill_kobj_path: path = '/devices/virtual/block/loop5'
 vfs_write+0x1fc/0x560 fs/read_write.c:549
kobject: 'event4' (0000000042b44264): kobject_uevent_env
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
kobject: 'event4' (0000000042b44264): fill_kobj_path: path = '/devices/virtual/input/input973/event4'
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457659
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:00007f139e1fcc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457659
RDX: 0000000000000030 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f139e1fd6d4
R13: 00000000004c57de R14: 00000000004d9730 R15: 00000000ffffffff
Modules linked in:
---[ end trace c2efcb56cdcdd28b ]---
kobject: 'input974' (00000000a4be01a4): fill_kobj_path: path = '/devices/virtual/input/input974'
RIP: 0010:fuse_retrieve fs/fuse/dev.c:1745 [inline]
RIP: 0010:fuse_notify_retrieve fs/fuse/dev.c:1807 [inline]
RIP: 0010:fuse_notify fs/fuse/dev.c:1840 [inline]
RIP: 0010:fuse_dev_do_write+0x1dc2/0x3820 fs/fuse/dev.c:1919
input: syz0 as /devices/virtual/input/input974
Code: 00 48 c1 e0 2a 80 3c 02 00 0f 85 e9 17 00 00 49 8b 9d 58 01 00 00 b8 ff ff 37 00 48 c1 e0 2a 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 8f
kobject: '(null)' (00000000f34829a7): kobject_cleanup, parent 0000000042b44264
RSP: 0018:ffff8881bc2af4b8 EFLAGS: 00010247
kobject: 'loop5' (000000002490c08c): kobject_uevent_env
kobject: 'loop5' (000000002490c08c): fill_kobj_path: path = '/devices/virtual/block/loop5'
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90009e06000
kobject: 'loop3' (000000006d4eda33): kobject_uevent_env
RDX: 0000000000000000 RSI: ffffffff82898673 RDI: 0000000000000004
kobject: '(null)' (00000000f34829a7): calling ktype release
RBP: ffff8881bc2afa50 R08: ffff8881bb6ac100 R09: ffffed103a557282
kobject: 'loop3' (000000006d4eda33): fill_kobj_path: path = '/devices/virtual/block/loop3'
R10: ffffed103a557282 R11: ffff8881d2ab9413 R12: 0000000000000000
kobject: 'loop1' (00000000e56d619c): kobject_uevent_env
R13: ffff8881d2ab93f0 R14: 0000000000000000 R15: 0000000000000030
kobject: 'event4' (0000000042b44264): kobject_cleanup, parent           (null)
FS:  00007f139e1fd700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
kobject: 'event4' (0000000042b44264): calling ktype release
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000047c960 CR3: 00000001b8d73000 CR4: 00000000001406e0
kobject: 'event4': free name
kobject: 'loop1' (00000000e56d619c): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'input973' (00000000dd9debe4): kobject_uevent_env
kobject: 'loop5' (000000002490c08c): kobject_uevent_env
kobject: 'event4' (0000000077246992): kobject_add_internal: parent: 'input974', set: 'devices'
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kobject: 'event4' (0000000077246992): kobject_uevent_env
kobject: 'input973' (00000000dd9debe4): fill_kobj_path: path = '/devices/virtual/input/input973'
kobject: 'event4' (0000000077246992): fill_kobj_path: path = '/devices/virtual/input/input974/event4'
kobject: 'loop5' (000000002490c08c): fill_kobj_path: path = '/devices/virtual/block/loop5'
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kobject: 'loop4' (00000000e5b09202): kobject_uevent_env