kasan: CONFIG_KASAN_INLINE enabled
kobject: 'loop0' (000000006ea8c6d3): kobject_uevent_env
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 17010 Comm: syz-executor4 Not tainted 5.0.0-rc3 #30
kobject: 'loop0' (000000006ea8c6d3): fill_kobj_path: path = '/devices/virtual/block/loop0'
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__skb_unlink include/linux/skbuff.h:1924 [inline]
RIP: 0010:skb_unlink+0xc4/0x160 net/core/skbuff.c:2989
Code: 00 00 49 8d 7d 08 4c 8b 63 08 48 b8 00 00 00 00 00 fc ff df 48 c7 43 08 00 00 00 00 48 89 fa 48 c7 03 00 00 00 00 48 c1 ea 03 <80> 3c 02 00 75 58 4c 89 e2 4d 89 65 08 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffff8880a4567808 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff888090a086c0 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000282 RDI: 0000000000000008
RBP: ffff8880a4567830 R08: 1ffff110148aceed R09: ffffed10148aceee
R10: ffffed10148aceed R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888062dae1e0 R15: ffff8880a4567d00
FS:  00007f1e9b84b700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30026000 CR3: 0000000052f00000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kcm_recvmsg+0x4bf/0x5b0 net/kcm/kcmsock.c:1160
 sock_recvmsg_nosec+0x8c/0xb0 net/socket.c:794
 ___sys_recvmsg+0x2a8/0x680 net/socket.c:2278
 do_recvmmsg+0x2f8/0xc40 net/socket.c:2391
 __sys_recvmmsg+0x259/0x270 net/socket.c:2470
 __do_sys_recvmmsg net/socket.c:2493 [inline]
 __se_sys_recvmmsg net/socket.c:2486 [inline]
 __x64_sys_recvmmsg+0xe6/0x140 net/socket.c:2486
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458099
Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1e9b84ac78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458099
RDX: 0000000000000006 RSI: 0000000020006740 RDI: 0000000000000005
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000040000000 R11: 0000000000000246 R12: 00007f1e9b84b6d4
R13: 00000000004c4cee R14: 00000000004d8590 R15: 00000000ffffffff
Modules linked in:
---[ end trace 1862fcfe60729cc8 ]---
RIP: 0010:__skb_unlink include/linux/skbuff.h:1924 [inline]
RIP: 0010:skb_unlink+0xc4/0x160 net/core/skbuff.c:2989
Code: 00 00 49 8d 7d 08 4c 8b 63 08 48 b8 00 00 00 00 00 fc ff df 48 c7 43 08 00 00 00 00 48 89 fa 48 c7 03 00 00 00 00 48 c1 ea 03 <80> 3c 02 00 75 58 4c 89 e2 4d 89 65 08 48 b8 00 00 00 00 00 fc ff
kobject: 'loop2' (00000000d9ac337f): kobject_uevent_env
RSP: 0018:ffff8880a4567808 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff888090a086c0 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000282 RDI: 0000000000000008
RBP: ffff8880a4567830 R08: 1ffff110148aceed R09: ffffed10148aceee
R10: ffffed10148aceed R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888062dae1e0 R15: ffff8880a4567d00
FS:  00007f1e9b84b700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
kobject: 'loop2' (00000000d9ac337f): fill_kobj_path: path = '/devices/virtual/block/loop2'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30026000 CR3: 0000000052f00000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400