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 CPU: 1 PID: 14817 Comm: syz-executor0 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:ffff88017dfff4b8 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005ddd000 RDX: 0000000000000000 RSI: ffffffff828b12d3 RDI: 0000000000000004 RBP: ffff88017dfffa50 R08: ffff88017e4b2240 R09: ffffed0037b7fac1 R10: ffffed0037b7fac1 R11: ffff8801bdbfd60b R12: 0000000000000000 R13: ffff8801bdbfd5e8 R14: 0000000000000000 R15: 0000000000000030 FS: 00007fd77f155700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 kobject: 'loop3' (00000000e8b8f003): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000707158 CR3: 00000001ba2ef000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop3' (00000000e8b8f003): fill_kobj_path: path = '/devices/virtual/block/loop3' 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:00007fd77f154c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 kobject: 'loop5' (0000000001f79aeb): kobject_uevent_env RDX: 0000000000000030 RSI: 0000000020000080 RDI: 0000000000000003 kobject: 'loop5' (0000000001f79aeb): fill_kobj_path: path = '/devices/virtual/block/loop5' RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd77f1556d4 R13: 00000000004c56de R14: 00000000004d95f0 R15: 00000000ffffffff Modules linked in: ---[ end trace 5ee293c0f9496135 ]--- 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 kobject: '0:48' (00000000b3ffbe0c): kobject_uevent_env RSP: 0018:ffff88017dfff4b8 EFLAGS: 00010247 kobject: '0:48' (00000000b3ffbe0c): fill_kobj_path: path = '/devices/virtual/bdi/0:48' RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005ddd000 kobject: 'loop1' (00000000814cf4c6): kobject_uevent_env RDX: 0000000000000000 RSI: ffffffff828b12d3 RDI: 0000000000000004 kobject: 'loop1' (00000000814cf4c6): fill_kobj_path: path = '/devices/virtual/block/loop1' RBP: ffff88017dfffa50 R08: ffff88017e4b2240 R09: ffffed0037b7fac1 kobject: '0:48' (00000000b3ffbe0c): kobject_cleanup, parent (null) R10: ffffed0037b7fac1 R11: ffff8801bdbfd60b R12: 0000000000000000 R13: ffff8801bdbfd5e8 R14: 0000000000000000 R15: 0000000000000030 kobject: '0:48' (00000000b3ffbe0c): calling ktype release FS: 00007fd77f155700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 kobject: '0:48': free name CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop4' (000000004f578af3): kobject_uevent_env CR2: 0000000000625208 CR3: 00000001ba2ef000 CR4: 00000000001406e0 kobject: 'loop4' (000000004f578af3): fill_kobj_path: path = '/devices/virtual/block/loop4' DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400