RDX: 0000000020000140 RSI: 0000000020000180 RDI: 00007fe7b6875fe0
RBP: 00007fe7b6876020 R08: 00007fe7b6876020 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000140
R13: 0000000020000180 R14: 00007fe7b6875fe0 R15: 00000000200001c0
------------[ cut here ]------------
WARNING: CPU: 1 PID: 13031 at fs/super.c:1163 kill_block_super+0xbe/0xe0 fs/super.c:1163
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 13031 Comm: syz-executor.4 Not tainted 4.14.302-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
batman_adv: Cannot find parent device
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
batman_adv: batadv0: Adding interface: gretap1
 __warn.cold+0x20/0x44 kernel/panic.c:547
audit: type=1800 audit(1671042080.914:5): pid=13063 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.1" name="SYSV00000000" dev="hugetlbfs" ino=0 res=0
batman_adv: batadv0: The MTU of interface gretap1 is too small (1462) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967
RIP: 0010:kill_block_super+0xbe/0xe0 fs/super.c:1163
RSP: 0018:ffff88804d82fbb0 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90006412000
batman_adv: batadv0: Not using interface gretap1 (retrying later): interface not active
RDX: 0000000000040000 RSI: ffffffff81877b4e RDI: ffff8880906c4cf0
RBP: ffff88805692e4c0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88805708c6c0 R12: ffff8880906c4840
R13: ffffffff890a3cb0 R14: ffffffff88f45bc0 R15: dffffc0000000000
 cramfs_kill_sb+0x38/0x50 fs/cramfs/inode.c:247
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 sget_userns+0x9c4/0xc10 fs/super.c:537
 sget+0xd1/0x110 fs/super.c:572
 mount_bdev+0xcd/0x360 fs/super.c:1107
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fe7b830560a
RSP: 002b:00007fe7b6875f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000140 RCX: 00007fe7b830560a
RDX: 0000000020000140 RSI: 0000000020000180 RDI: 00007fe7b6875fe0
RBP: 00007fe7b6876020 R08: 00007fe7b6876020 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000140
R13: 0000000020000180 R14: 00007fe7b6875fe0 R15: 00000000200001c0
Kernel Offset: disabled
Rebooting in 86400 seconds..