batman_adv: batadv0: Adding interface: dummy0
batman_adv: batadv0: The MTU of interface dummy0 is too small (1500) 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.
batman_adv: batadv0: Interface activated: dummy0
loop0: detected capacity change from 0 to 2048
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
batadv0: mtu less than device minimum
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
------------[ cut here ]------------
kernel BUG at fs/ext4/inline.c:235!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.14.0-rc5-syzkaller-00234-gb7c90e3e717a #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ext4_write_inline_data+0x37d/0x380 fs/ext4/inline.c:235
Code: 89 f9 80 e1 07 fe c1 38 c1 0f 8c 22 ff ff ff 4c 89 ff e8 e6 2f ac ff e9 15 ff ff ff e8 3c f4 44 ff 90 0f 0b e8 34 f4 44 ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e
RSP: 0018:ffffc9000d4ff820 EFLAGS: 00010287
RAX: ffffffff827ceadc RBX: 000000000000003c RCX: 0000000000100000
RDX: ffffc9000e362000 RSI: 000000000000038a RDI: 000000000000038b
RBP: 0000000000000001 R08: ffffffff827ce888 R09: 1ffff11008128c70
R10: dffffc0000000000 R11: ffffed1008128c71 R12: 0000010000000006
R13: dffffc0000000000 R14: 0000010000000005 R15: ffffc9000d4ff900
FS:  00007f8f5663a6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8f496ffe00 CR3: 0000000043474000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_write_inline_data_end+0x2f7/0xa80 fs/ext4/inline.c:774
 generic_perform_write+0x6f6/0x990 mm/filemap.c:4203
 ext4_buffered_write_iter+0xc7/0x390 fs/ext4/file.c:299
 ext4_file_write_iter+0x88f/0x1ce0
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xacf/0xd10 fs/read_write.c:679
 ksys_pwrite64 fs/read_write.c:786 [inline]
 __do_sys_pwrite64 fs/read_write.c:794 [inline]
 __se_sys_pwrite64 fs/read_write.c:791 [inline]
 __x64_sys_pwrite64+0x1ac/0x240 fs/read_write.c:791
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8f5578d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8f5663a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f8f559a5fa0 RCX: 00007f8f5578d169
RDX: 0000000000000001 RSI: 0000400000000300 RDI: 000000000000000c
RBP: 00007f8f5580e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000010000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8f559a5fa0 R15: 00007ffc6b11a918
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_write_inline_data+0x37d/0x380 fs/ext4/inline.c:235
Code: 89 f9 80 e1 07 fe c1 38 c1 0f 8c 22 ff ff ff 4c 89 ff e8 e6 2f ac ff e9 15 ff ff ff e8 3c f4 44 ff 90 0f 0b e8 34 f4 44 ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e
RSP: 0018:ffffc9000d4ff820 EFLAGS: 00010287
RAX: ffffffff827ceadc RBX: 000000000000003c RCX: 0000000000100000
RDX: ffffc9000e362000 RSI: 000000000000038a RDI: 000000000000038b
RBP: 0000000000000001 R08: ffffffff827ce888 R09: 1ffff11008128c70
R10: dffffc0000000000 R11: ffffed1008128c71 R12: 0000010000000006
R13: dffffc0000000000 R14: 0000010000000005 R15: ffffc9000d4ff900
FS:  00007f8f5663a6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8f496ffe00 CR3: 0000000043474000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400