audit: type=1400 audit(1570310470.836:42): avc: denied { read } for pid=7095 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 list_add double add: new=ffff888058c98a58, prev=ffff888058c98a58, next=ffff8880870e4a40. ------------[ cut here ]------------ kobject: 'veth4' (ffff888058d9f430): kobject_uevent_env kernel BUG at lib/list_debug.c:29! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: kobject: 'veth4' (ffff888058d9f430): fill_kobj_path: path = '/devices/virtual/net/veth4' CPU: 0 PID: 7119 Comm: syz-executor.5 Not tainted 4.14.147 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a5f10340 task.stack: ffff888059700000 RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 RSP: 0018:ffff888059707a00 EFLAGS: 00010282 kobject: 'queues' (ffff88808a923848): kobject_add_internal: parent: 'veth4', set: '' RAX: 0000000000000058 RBX: ffff8880870e4a00 RCX: 0000000000000000 RDX: 0000000000010321 RSI: ffffffff814b4025 RDI: ffffed100b2e0f36 RBP: ffff888059707a18 R08: 0000000000000058 R09: ffff8880a5f10c08 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880870e4a40 R13: ffff888058c98a58 R14: ffff888058c98a58 R15: ffff888058c98a58 FS: 00007f79b3686700(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 kobject: 'queues' (ffff88808a923848): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001b0d3e8 CR3: 00000000a0429000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add include/linux/list.h:60 [inline] list_add_tail include/linux/list.h:93 [inline] p9_fd_request+0xe3/0x2b0 net/9p/trans_fd.c:679 p9_client_rpc+0x21b/0x1180 net/9p/client.c:774 kobject: 'queues' (ffff88808a923848): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (ffff888092259850): kobject_add_internal: parent: 'queues', set: 'queues' p9_client_clunk+0x89/0x150 net/9p/client.c:1507 v9fs_dentry_release+0x6d/0xd0 fs/9p/vfs_dentry.c:73 kobject: 'rx-0' (ffff888092259850): kobject_uevent_env __dentry_kill+0x39a/0x580 fs/dcache.c:596 kobject: 'rx-0' (ffff888092259850): fill_kobj_path: path = '/devices/virtual/net/veth4/queues/rx-0' dentry_kill fs/dcache.c:632 [inline] dput.part.0+0x59f/0x750 fs/dcache.c:847 dput fs/dcache.c:811 [inline] do_one_tree+0x44/0x50 fs/dcache.c:1507 shrink_dcache_for_umount+0x67/0x140 fs/dcache.c:1521 generic_shutdown_super+0x6d/0x370 fs/super.c:431 kill_anon_super+0x3f/0x60 fs/super.c:1006 kobject: 'tx-0' (ffff88808b0695d8): kobject_add_internal: parent: 'queues', set: 'queues' v9fs_kill_super+0x3e/0xa0 fs/9p/vfs_super.c:230 deactivate_locked_super+0x74/0xe0 fs/super.c:319 deactivate_super fs/super.c:350 [inline] deactivate_super+0x85/0xa0 fs/super.c:346 cleanup_mnt+0xb2/0x150 fs/namespace.c:1183 __cleanup_mnt+0x16/0x20 fs/namespace.c:1190 task_work_run+0x114/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297 kobject: 'tx-0' (ffff88808b0695d8): kobject_uevent_env entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459a59 kobject: 'tx-0' (ffff88808b0695d8): fill_kobj_path: path = '/devices/virtual/net/veth4/queues/tx-0' RSP: 002b:00007f79b3685c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000459a59 RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000020000140 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f79b36866d4 R13: 00000000004c9494 R14: 00000000004e0b60 R15: 00000000ffffffff Code: kobject: 'batman_adv' (ffff88808aa0f280): kobject_add_internal: parent: 'veth4', set: '' e9 56 ff ff ff 4c 89 e1 48 c7 c7 00 31 9d 86 kobject: 'veth5' (ffff888058d9d3f0): kobject_add_internal: parent: 'net', set: 'devices' e8 1f 9f 72 fe 0f 0b 48 89 f2 4c 89 e1 4c 89 ee 48 c7 c7 40 32 9d kobject: 'veth5' (ffff888058d9d3f0): kobject_uevent_env 86 e8 08 9f 72 fe <0f> 0b 48 89 kobject: 'veth5' (ffff888058d9d3f0): fill_kobj_path: path = '/devices/virtual/net/veth5' f1 48 c7 c7 c0 31 9d 86 4c 89 e6 e8 f4 9e 72 fe 0f RIP: __list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 RSP: ffff888059707a00 ---[ end trace a6da925e78a2f0b8 ]--- kobject: 'queues' (ffff88808a923448): kobject_add_internal: parent: 'veth5', set: ''