__build_skb+0x35/0x2e0 net/core/skbuff.c:281
 build_skb+0x1f/0x160 net/core/skbuff.c:312
kobject: 'loop2' (ffff8880a49626e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
 bpf_prog_test_run_skb+0x157/0x9a0 net/bpf/test_run.c:122
------------[ cut here ]------------
WARNING: CPU: 0 PID: 11899 at fs/super.c:1163 kill_block_super+0xc9/0xf0 fs/super.c:1163
Kernel panic - not syncing: panic_on_warn set ...

 bpf_prog_test_run kernel/bpf/syscall.c:1258 [inline]
 SYSC_bpf kernel/bpf/syscall.c:1520 [inline]
 SyS_bpf+0x749/0x38f3 kernel/bpf/syscall.c:1469
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459279
RSP: 002b:00007f12dadfbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f12dadfbc90 RCX: 0000000000459279
RDX: 0000000000000028 RSI: 00000000200000c0 RDI: 000000000000000a
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f12dadfc6d4
R13: 00000000004bf56e R14: 00000000004d0b58 R15: 0000000000000004
CPU: 0 PID: 11899 Comm: syz-executor.4 Not tainted 4.14.124 #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
 panic+0x1f2/0x426 kernel/panic.c:182
 __warn.cold+0x2f/0x36 kernel/panic.c:546
 report_bug+0x216/0x254 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:960
RIP: 0010:kill_block_super+0xc9/0xf0 fs/super.c:1163
RSP: 0018:ffff88808e447b98 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000bc6c000
RDX: 0000000000040000 RSI: ffffffff818d9929 RDI: ffff88808892a5a0
RBP: ffff88808e447bb0 R08: ffff888067674740 R09: 0000000000000001
R10: 0000000000000000 R11: ffff888067674740 R12: ffff888067a7cbc0
R13: ffff88808892a200 R14: ffff888067a7cbc0 R15: dffffc0000000000
 deactivate_locked_super+0x74/0xe0 fs/super.c:319
 sget_userns+0x9d9/0xc30 fs/super.c:537
 sget+0xd6/0x120 fs/super.c:572
 mount_bdev+0xd5/0x370 fs/super.c:1107
 jfs_do_mount+0x35/0x40 fs/jfs/super.c:703
 mount_fs+0x97/0x2a1 fs/super.c:1237
 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x417/0x27d0 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xab/0x120 fs/namespace.c:3072
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45bcca
RSP: 002b:00007fcbb007fa88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fcbb007fb40 RCX: 000000000045bcca
RDX: 00007fcbb007fae0 RSI: 0000000020000080 RDI: 00007fcbb007fb00
RBP: 0000000000000000 R08: 00007fcbb007fb40 R09: 00007fcbb007fae0
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000005
R13: 00000000004c8211 R14: 00000000004dea48 R15: 0000000000000004
Kernel Offset: disabled
Rebooting in 86400 seconds..