kasan: CONFIG_KASAN_INLINE enabled loop4: unable to read partition table kasan: GPF could be caused by NULL-ptr deref or user memory access loop4: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop4 () failed (rc=-5) general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 23262 Comm: syz-executor2 Not tainted 4.20.0-rc4+ #357 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 RSP: 0018:ffff88817f5c74b8 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90013ec5000 RDX: 0000000000000000 RSI: ffffffff828993a3 RDI: 0000000000000004 RBP: ffff88817f5c7a50 R08: ffff88818565c700 R09: ffffed1037a18e43 R10: ffffed1037a18e43 R11: ffff8881bd0c721b R12: 0000000000000000 R13: ffff8881bd0c71f8 R14: 0000000000000000 R15: 0000000000000030 FS: 00007ff9710a0700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001ffe9b8 CR3: 00000001bcf4c000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fuse_dev_write+0x19a/0x240 fs/fuse/dev.c:2003 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 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:00007ff97109fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000000000030 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff9710a06d4 R13: 00000000004c587b R14: 00000000004d9970 R15: 00000000ffffffff Modules linked in: kobject: 'loop5' (0000000003e96028): kobject_uevent_env kobject: 'loop4' (0000000038a3a598): kobject_uevent_env kobject: 'loop5' (0000000003e96028): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000038a3a598): fill_kobj_path: path = '/devices/virtual/block/loop4' ---[ end trace 4e3831cbeb56936b ]--- kobject: 'loop1' (0000000094876c4c): kobject_uevent_env 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 kobject: '0:48' (000000007e085122): kobject_add_internal: parent: 'bdi', set: 'devices' 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: '0:48' (000000007e085122): kobject_uevent_env RSP: 0018:ffff88817f5c74b8 EFLAGS: 00010247 kobject: 'loop1' (0000000094876c4c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (0000000003e96028): kobject_uevent_env RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90013ec5000 kobject: 'loop5' (0000000003e96028): fill_kobj_path: path = '/devices/virtual/block/loop5' RDX: 0000000000000000 RSI: ffffffff828993a3 RDI: 0000000000000004 kobject: '0:48' (000000007e085122): fill_kobj_path: path = '/devices/virtual/bdi/0:48' RBP: ffff88817f5c7a50 R08: ffff88818565c700 R09: ffffed1037a18e43 kobject: 'loop5' (0000000003e96028): kobject_uevent_env kobject: '0:48' (000000007e085122): kobject_uevent_env R10: ffffed1037a18e43 R11: ffff8881bd0c721b R12: 0000000000000000 R13: ffff8881bd0c71f8 R14: 0000000000000000 R15: 0000000000000030 kobject: 'loop4' (0000000038a3a598): kobject_uevent_env kobject: 'loop5' (0000000003e96028): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: '0:48' (000000007e085122): fill_kobj_path: path = '/devices/virtual/bdi/0:48' FS: 00007ff9710a0700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 kobject: 'loop4' (0000000038a3a598): fill_kobj_path: path = '/devices/virtual/block/loop4' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 BFS-fs: bfs_fill_super(): No BFS filesystem on loop5 (magic=00000000) kobject: 'loop4' (0000000038a3a598): kobject_uevent_env kobject: '0:48' (000000007e085122): kobject_cleanup, parent (null) kobject: 'loop4' (0000000038a3a598): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: '0:48' (000000007e085122): calling ktype release CR2: 00007f717539bdb8 CR3: 00000001bcf4c000 CR4: 00000000001426e0 kobject: '0:48': free name DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400