kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 11303 Comm: syz-executor2 Not tainted 4.20.0-rc1-next-20181109+ #110
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:fuse_retrieve fs/fuse/dev.c:1741 [inline]
RIP: 0010:fuse_notify_retrieve fs/fuse/dev.c:1801 [inline]
RIP: 0010:fuse_notify fs/fuse/dev.c:1834 [inline]
RIP: 0010:fuse_dev_do_write+0x1dc2/0x3810 fs/fuse/dev.c:1913
Code: 00 48 c1 e0 2a 80 3c 02 00 0f 85 dc 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 82
RSP: 0018:ffff8801ae33f4b8 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90009dfd000
RDX: 0000000000000000 RSI: ffffffff828b12d3 RDI: 0000000000000004
RBP: ffff8801ae33fa50 R08: ffff8801b8642200 R09: ffffed00363caa82
R10: ffffed00363caa82 R11: ffff8801b1e55413 R12: 0000000000000000
R13: ffff8801b1e553f0 R14: 0000000000000000 R15: 0000000000000030
FS:  00007f7e3874f700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd224fa488 CR3: 00000001ba198000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fuse_dev_write+0x19a/0x240 fs/fuse/dev.c:1997
 call_write_iter include/linux/fs.h:1867 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x6b8/0x9f0 fs/read_write.c:487
 vfs_write+0x1fc/0x560 fs/read_write.c:549
 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
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
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:00007f7e3874ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000030 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7e3874f6d4
R13: 00000000004c587b R14: 00000000004d9970 R15: 00000000ffffffff
Modules linked in:
---[ end trace e376da27cc860508 ]---
RIP: 0010:fuse_retrieve fs/fuse/dev.c:1741 [inline]
RIP: 0010:fuse_notify_retrieve fs/fuse/dev.c:1801 [inline]
RIP: 0010:fuse_notify fs/fuse/dev.c:1834 [inline]
RIP: 0010:fuse_dev_do_write+0x1dc2/0x3810 fs/fuse/dev.c:1913
kobject: 'loop1' (00000000e5bf4688): kobject_uevent_env
kobject: '0:45' (0000000080e70937): kobject_uevent_env
kobject: 'loop1' (00000000e5bf4688): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:45' (0000000080e70937): fill_kobj_path: path = '/devices/virtual/bdi/0:45'
Code: 00 48 c1 e0 2a 80 3c 02 00 0f 85 dc 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 82
kobject: '0:45' (0000000080e70937): kobject_cleanup, parent           (null)
kobject: 'loop1' (00000000e5bf4688): kobject_uevent_env
kobject: 'loop1' (00000000e5bf4688): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (0000000085a26405): kobject_uevent_env
kobject: 'loop4' (0000000085a26405): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:45' (0000000080e70937): calling ktype release
RSP: 0018:ffff8801ae33f4b8 EFLAGS: 00010247
kobject: '0:45': free name
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90009dfd000
RDX: 0000000000000000 RSI: ffffffff828b12d3 RDI: 0000000000000004
kobject: 'loop1' (00000000e5bf4688): kobject_uevent_env
kobject: 'loop1' (00000000e5bf4688): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000009678caca): kobject_uevent_env
RBP: ffff8801ae33fa50 R08: ffff8801b8642200 R09: ffffed00363caa82
kobject: 'loop0' (000000009678caca): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:45' (0000000009f91b89): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'nullb0' (0000000060cf3ef7): kobject_uevent_env
R10: ffffed00363caa82 R11: ffff8801b1e55413 R12: 0000000000000000
kobject: 'nullb0' (0000000060cf3ef7): fill_kobj_path: path = '/devices/virtual/block/nullb0'
kobject: '0:45' (0000000009f91b89): kobject_uevent_env
R13: ffff8801b1e553f0 R14: 0000000000000000 R15: 0000000000000030
kobject: '0:45' (0000000009f91b89): fill_kobj_path: path = '/devices/virtual/bdi/0:45'
FS:  00007f7e3874f700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
kobject: 'loop1' (00000000e5bf4688): kobject_uevent_env
kobject: 'loop1' (00000000e5bf4688): fill_kobj_path: path = '/devices/virtual/block/loop1'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb788ef3e70 CR3: 00000001ba198000 CR4: 00000000001406f0
kobject: 'loop3' (00000000e55f1de1): kobject_uevent_env
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kobject: 'loop3' (00000000e55f1de1): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (0000000085a26405): kobject_uevent_env
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kobject: 'loop4' (0000000085a26405): fill_kobj_path: path = '/devices/virtual/block/loop4'