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: 8157 Comm: kworker/u4:5 Not tainted 4.20.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:__skb_unlink include/linux/skbuff.h:1924 [inline] RIP: 0010:__skb_dequeue include/linux/skbuff.h:1941 [inline] RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2655 [inline] RIP: 0010:gro_cells_destroy net/core/gro_cells.c:89 [inline] RIP: 0010:gro_cells_destroy+0x19d/0x360 net/core/gro_cells.c:78 Code: 03 42 80 3c 20 00 0f 85 53 01 00 00 48 8d 7a 08 49 8b 47 08 49 c7 07 00 00 00 00 48 89 f9 49 c7 47 08 00 00 00 00 48 c1 e9 03 <42> 80 3c 21 00 0f 85 10 01 00 00 48 89 c1 48 89 42 08 48 c1 e9 03 RSP: 0018:ffff888069c874b0 EFLAGS: 00010206 RAX: ffffffe8ffffd883 RBX: ffffe8ffffd88260 RCX: 0b9ffffd1ffffb11 RDX: 5cffffe8ffffd882 RSI: ffffffff8634f68a RDI: 5cffffe8ffffd88a RBP: ffff888069c87510 R08: ffff88808e484180 R09: fffffbfff1460a79 R10: fffffbfff1460a78 R11: ffffffff8a3053c3 R12: dffffc0000000000 R13: 0000000000000001 R14: ffffe8ffffd88270 R15: ffffe8ffffd88261 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000247f978 CR3: 00000000917fa000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ip_tunnel_dev_free+0x19/0x60 net/ipv4/ip_tunnel.c:969 netdev_run_todo+0x647/0xae0 net/core/dev.c:8885 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:117 ip_tunnel_delete_nets+0x4df/0x6d0 net/ipv4/ip_tunnel.c:1083 ipgre_exit_batch_net+0x23/0x30 net/ipv4/ip_gre.c:1062 ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156 cleanup_net+0x51d/0xb10 net/core/net_namespace.c:551 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: kobject: 'loop4' (0000000054086c97): kobject_uevent_env kobject: 'loop4' (0000000054086c97): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000c7d4cbe6): kobject_uevent_env kobject: 'loop1' (00000000c7d4cbe6): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000054086c97): kobject_uevent_env ---[ end trace 2d3f2447199d43da ]--- RIP: 0010:__skb_unlink include/linux/skbuff.h:1924 [inline] RIP: 0010:__skb_dequeue include/linux/skbuff.h:1941 [inline] RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2655 [inline] RIP: 0010:gro_cells_destroy net/core/gro_cells.c:89 [inline] RIP: 0010:gro_cells_destroy+0x19d/0x360 net/core/gro_cells.c:78 Code: 03 42 80 3c 20 00 0f 85 53 01 00 00 48 8d 7a 08 49 8b 47 08 49 c7 07 00 00 00 00 48 89 f9 49 c7 47 08 00 00 00 00 48 c1 e9 03 <42> 80 3c 21 00 0f 85 10 01 00 00 48 89 c1 48 89 42 08 48 c1 e9 03 kobject: 'loop4' (0000000054086c97): fill_kobj_path: path = '/devices/virtual/block/loop4' RSP: 0018:ffff888069c874b0 EFLAGS: 00010206 RAX: ffffffe8ffffd883 RBX: ffffe8ffffd88260 RCX: 0b9ffffd1ffffb11 RDX: 5cffffe8ffffd882 RSI: ffffffff8634f68a RDI: 5cffffe8ffffd88a kobject: 'loop2' (000000002c950655): kobject_uevent_env RBP: ffff888069c87510 R08: ffff88808e484180 R09: fffffbfff1460a79 kobject: 'loop2' (000000002c950655): fill_kobj_path: path = '/devices/virtual/block/loop2' R10: fffffbfff1460a78 R11: ffffffff8a3053c3 R12: dffffc0000000000 R13: 0000000000000001 R14: ffffe8ffffd88270 R15: ffffe8ffffd88261 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop3' (00000000387a3678): kobject_uevent_env CR2: 0000000020f40ff8 CR3: 0000000097b37000 CR4: 00000000001406f0 kobject: 'loop3' (00000000387a3678): fill_kobj_path: path = '/devices/virtual/block/loop3' DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop0' (00000000ae5ddd32): kobject_uevent_env DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop0' (00000000ae5ddd32): fill_kobj_path: path = '/devices/virtual/block/loop0'