WARNING: CPU: 0 PID: 30202 at mm/slab_common.c:473 kmem_cache_create_usercopy+0xad/0x240 mm/slab_common.c:473 kobject: 'loop0' (00000000550e493a): kobject_uevent_env Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 30202 Comm: syz-executor0 Not tainted 4.19.0-rc7-next-20181012+ #93 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x3ab lib/dump_stack.c:113 kobject: 'loop3' (000000006ad54ccd): kobject_uevent_env panic+0x238/0x4e7 kernel/panic.c:184 kobject: 'loop0' (00000000550e493a): fill_kobj_path: path = '/devices/virtual/block/loop0' __warn.cold.8+0x163/0x1ba kernel/panic.c:536 kobject: 'loop3' (000000006ad54ccd): fill_kobj_path: path = '/devices/virtual/block/loop3' report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 kobject: 'loop1' (0000000054769efb): kobject_uevent_env invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 RIP: 0010:kmem_cache_create_usercopy+0xad/0x240 mm/slab_common.c:473 kobject: 'loop1' (0000000054769efb): fill_kobj_path: path = '/devices/virtual/block/loop1' Code: 44 89 f0 25 00 60 de 04 45 85 ed 89 45 cc 75 0b 8b 45 d0 85 c0 0f 85 8e 01 00 00 44 39 eb 72 0a 89 d8 44 29 e8 3b 45 d0 73 7e <0f> 0b c7 45 d0 00 00 00 00 4c 8b 45 10 44 89 fa 89 de 4c 89 e7 8b RSP: 0018:ffff880189b3f5d0 EFLAGS: 00010213 RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000006 RDX: 0000000000000000 RSI: 0000000000000020 RDI: ffffffff88b05f00 RBP: ffff880189b3f608 R08: fffffbfff1283bc9 R09: fffffbfff1283bc8 R10: ffff880189b3f5c0 R11: ffffffff8941de47 R12: ffffffff88b05f00 R13: 00000000fffffffd R14: 0000000000000000 R15: 0000000000000000 p9_client_create+0x986/0x166f net/9p/client.c:1054 kobject: 'loop4' (000000009ab17b4a): kobject_uevent_env kobject: 'loop4' (000000009ab17b4a): fill_kobj_path: path = '/devices/virtual/block/loop4' v9fs_session_init+0x217/0x1bb0 fs/9p/v9fs.c:421 kobject: 'loop4' (000000009ab17b4a): kobject_uevent_env v9fs_mount+0x7c/0x8f0 fs/9p/vfs_super.c:135 kobject: 'loop4' (000000009ab17b4a): fill_kobj_path: path = '/devices/virtual/block/loop4' legacy_get_tree+0x131/0x460 fs/fs_context.c:718 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1795 do_new_mount fs/namespace.c:2648 [inline] do_mount+0x70c/0x1d90 fs/namespace.c:2974 kobject: 'loop5' (000000009f89b43b): kobject_uevent_env kobject: 'loop5' (000000009f89b43b): fill_kobj_path: path = '/devices/virtual/block/loop5' ksys_mount+0x12d/0x140 fs/namespace.c:3190 __do_sys_mount fs/namespace.c:3204 [inline] __se_sys_mount fs/namespace.c:3201 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3201 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:00007f2a2f556c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457569 RDX: 0000000020000600 RSI: 00000000200005c0 RDI: 0000000000000000 RBP: 000000000072bfa0 R08: 0000000020000240 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2a2f5576d4 R13: 00000000004c28a1 R14: 00000000004d3c90 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..