batman_adv: batadv0: The MTU of interface team0 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: team0
EXT4-fs (loop0): VFS: Can't find ext4 filesystem
------------[ cut here ]------------
kernel BUG at arch/x86/mm/physaddr.c:27!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4696 Comm: systemd-udevd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__phys_addr+0xa7/0x110 arch/x86/mm/physaddr.c:27
Code: 67 fb 09 4c 89 e3 31 ff 48 d3 eb 48 89 de e8 40 28 37 00 48 85 db 75 0d e8 a6 26 37 00 4c 89 e0 5b 5d 41 5c c3 e8 99 26 37 00 <0f> 0b e8 92 26 37 00 48 c7 c0 10 30 e7 89 48 ba 00 00 00 00 00 fc
RSP: 0018:ffff88809ba1fa90 EFLAGS: 00010293
RAX: ffff88809ba16680 RBX: 0077707700777700 RCX: ffffffff812b5e78
RDX: 0000000000000000 RSI: ffffffff812b5ed7 RDI: 0000000000000006
RBP: 0077707780777700 R08: 0000000000000000 R09: 0077707780777700
R10: 0000000000000006 R11: 0000000000000000 R12: 0077e7f700777700
R13: ffff88809ba1fae8 R14: 0000000000000000 R15: 0000000000000286
FS:  00007f07cba958c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005622b715e980 CR3: 000000009b0be000 CR4: 00000000003426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 virt_to_head_page include/linux/mm.h:665 [inline]
 qlink_to_cache mm/kasan/quarantine.c:127 [inline]
 qlist_free_all+0xbb/0x140 mm/kasan/quarantine.c:163
 quarantine_reduce+0x1a9/0x230 mm/kasan/quarantine.c:259
 kasan_kmalloc+0xa2/0x160 mm/kasan/kasan.c:538
 slab_post_alloc_hook mm/slab.h:445 [inline]
 slab_alloc mm/slab.c:3397 [inline]
 kmem_cache_alloc+0x110/0x370 mm/slab.c:3557
 getname_flags+0xce/0x590 fs/namei.c:140
 user_path_at_empty+0x2a/0x50 fs/namei.c:2609
 do_readlinkat+0xcd/0x2f0 fs/stat.c:394
 __do_sys_readlinkat fs/stat.c:421 [inline]
 __se_sys_readlinkat fs/stat.c:418 [inline]
 __x64_sys_readlinkat+0x93/0xf0 fs/stat.c:418
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f07ca9090ba
Code: 48 8b 0d e1 bd 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 0b 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ae bd 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd86282ce8 EFLAGS: 00000202 ORIG_RAX: 000000000000010b
RAX: ffffffffffffffda RBX: 00005622b7160b80 RCX: 00007f07ca9090ba
RDX: 00005622b7160b80 RSI: 00005622b71512f0 RDI: 00000000ffffff9c
RBP: 0000000000000064 R08: 00005622b7120670 R09: 0000000000000070
R10: 0000000000000063 R11: 0000000000000202 R12: 00005622b71512f0
R13: 00000000ffffff9c R14: 00007ffd86282d40 R15: 0000000000000063
Modules linked in:
---[ end trace e744b4ca17907f95 ]---
RIP: 0010:__phys_addr+0xa7/0x110 arch/x86/mm/physaddr.c:27
Code: 67 fb 09 4c 89 e3 31 ff 48 d3 eb 48 89 de e8 40 28 37 00 48 85 db 75 0d e8 a6 26 37 00 4c 89 e0 5b 5d 41 5c c3 e8 99 26 37 00 <0f> 0b e8 92 26 37 00 48 c7 c0 10 30 e7 89 48 ba 00 00 00 00 00 fc
RSP: 0018:ffff88809ba1fa90 EFLAGS: 00010293
RAX: ffff88809ba16680 RBX: 0077707700777700 RCX: ffffffff812b5e78
RDX: 0000000000000000 RSI: ffffffff812b5ed7 RDI: 0000000000000006
RBP: 0077707780777700 R08: 0000000000000000 R09: 0077707780777700
R10: 0000000000000006 R11: 0000000000000000 R12: 0077e7f700777700
R13: ffff88809ba1fae8 R14: 0000000000000000 R15: 0000000000000286
FS:  00007f07cba958c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
netlink: 'syz-executor.4': attribute type 10 has an invalid length.
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f15b1dd0718 CR3: 000000009b0be000 CR4: 00000000003426f0
MTD: Attempt to mount non-MTD device "/dev/loop0"
caif:caif_disconnect_client(): nothing to disconnect
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
batman_adv: batadv0: Interface deactivated: team0
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
batman_adv: batadv0: Removing interface: team0