kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access kobject: 'loop5' (00000000fc9b34d0): fill_kobj_path: path = '/devices/virtual/block/loop5' general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 28304 Comm: syz-executor.1 Not tainted 4.19.0-rc6+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] RIP: 0010:do_raw_spin_lock+0x27/0x200 kernel/locking/spinlock_debug.c:112 Code: 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 56 41 55 41 54 53 48 89 fb 48 83 c7 04 48 89 fa 48 83 ec 08 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 7b RSP: 0018:ffff8800921aef88 EFLAGS: 00010003 RAX: dffffc0000000000 RBX: 0000000000000118 RCX: 0000000000000000 RDX: 0000000000000023 RSI: 0000000000000000 RDI: 000000000000011c RBP: ffff8800921aefb0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffed00116e00cc R11: 0000000000000000 R12: 0000000000000286 R13: ffff88008b700580 R14: 0000000000000118 R15: ffff88008a2a7748 FS: 00007f92070ec700(0000) GS:ffff8800aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcd3e9bdac CR3: 000000009ff97000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline] _raw_spin_lock_irqsave+0xa1/0xd0 kernel/locking/spinlock.c:152 kobject: 'loop5' (00000000fc9b34d0): kobject_uevent_env skb_queue_tail+0x21/0x150 net/core/skbuff.c:2918 rxrpc_reject_packet net/rxrpc/input.c:1082 [inline] rxrpc_data_ready+0x6ec/0x471b net/rxrpc/input.c:1398 kobject: 'loop5' (00000000fc9b34d0): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000fc9b34d0): kobject_uevent_env kobject: 'loop5' (00000000fc9b34d0): fill_kobj_path: path = '/devices/virtual/block/loop5' __udp_enqueue_schedule_skb+0x3a7/0x5e0 net/ipv4/udp.c:1412 kobject: 'loop3' (00000000e3001a1a): kobject_uevent_env __udp_queue_rcv_skb net/ipv4/udp.c:1875 [inline] udp_queue_rcv_skb+0x9dd/0x1350 net/ipv4/udp.c:1999 udp_unicast_rcv_skb.isra.52+0x2c8/0x350 net/ipv4/udp.c:2139 __udp4_lib_rcv+0x5fe/0x2ba0 net/ipv4/udp.c:2195 udp_rcv+0x15/0x20 net/ipv4/udp.c:2376 kobject: 'loop3' (00000000e3001a1a): fill_kobj_path: path = '/devices/virtual/block/loop3' ip_local_deliver_finish+0x23a/0x9c0 net/ipv4/ip_input.c:215 NF_HOOK include/linux/netfilter.h:289 [inline] ip_local_deliver+0x2f7/0x440 net/ipv4/ip_input.c:256 kobject: 'loop0' (000000009b57a8d0): kobject_uevent_env kobject: 'loop0' (000000009b57a8d0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (0000000058445527): kobject_uevent_env dst_input include/net/dst.h:450 [inline] ip_rcv_finish+0x173/0x270 net/ipv4/ip_input.c:415 NF_HOOK include/linux/netfilter.h:289 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 kobject: 'loop4' (0000000058445527): fill_kobj_path: path = '/devices/virtual/block/loop4' __netif_receive_skb_one_core+0xeb/0x170 net/core/dev.c:4894 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5004 netif_receive_skb_internal+0xd1/0x3c0 net/core/dev.c:5107 napi_frags_finish net/core/dev.c:5643 [inline] napi_gro_frags+0x4d6/0x950 net/core/dev.c:5716 tun_get_user+0x21b0/0x32c0 drivers/net/tun.c:1957 tun_chr_write_iter+0xaf/0x150 drivers/net/tun.c:2002 call_write_iter include/linux/fs.h:1808 [inline] do_iter_readv_writev+0x4b8/0x960 fs/read_write.c:680 do_iter_write+0x128/0x540 fs/read_write.c:959 vfs_writev+0x16f/0x2d0 fs/read_write.c:1004 do_writev+0xda/0x260 fs/read_write.c:1039 __do_sys_writev fs/read_write.c:1112 [inline] __se_sys_writev fs/read_write.c:1109 [inline] __x64_sys_writev+0x70/0xb0 fs/read_write.c:1109 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458ae1 Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 e4 b9 fb ff c3 48 83 ec 08 e8 1a 2d 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 63 2d 00 00 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f92070ebba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 000000000000002a RCX: 0000000000458ae1 RDX: 0000000000000001 RSI: 00007f92070ebc00 RDI: 00000000000000f0 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 00007f92070ec9d0 R11: 0000000000000293 R12: 00007f92070ec6d4 R13: 00000000004c7523 R14: 00000000004dd490 R15: 00000000ffffffff Modules linked in: ---[ end trace 5f3a5239820325d9 ]--- RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] RIP: 0010:do_raw_spin_lock+0x27/0x200 kernel/locking/spinlock_debug.c:112 Code: 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 56 41 55 41 54 53 48 89 fb 48 83 c7 04 48 89 fa 48 83 ec 08 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 7b RSP: 0018:ffff8800921aef88 EFLAGS: 00010003 RAX: dffffc0000000000 RBX: 0000000000000118 RCX: 0000000000000000 RDX: 0000000000000023 RSI: 0000000000000000 RDI: 000000000000011c RBP: ffff8800921aefb0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffed00116e00cc R11: 0000000000000000 R12: 0000000000000286 R13: ffff88008b700580 R14: 0000000000000118 R15: ffff88008a2a7748 FS: 00007f92070ec700(0000) GS:ffff8800aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcd3e9bdac CR3: 000000009ff97000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400