loop4: detected capacity change from 0 to 512
EXT4-fs (loop4): mounted filesystem without journal. Quota mode: none.
------------[ cut here ]------------
kernel BUG at net/phonet/socket.c:213!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4727 Comm: syz.4.128 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : pn_socket_autobind net/phonet/socket.c:213 [inline]
pc : pn_socket_sendmsg+0x210/0x214 net/phonet/socket.c:422
lr : pn_socket_autobind net/phonet/socket.c:213 [inline]
lr : pn_socket_sendmsg+0x210/0x214 net/phonet/socket.c:422
sp : ffff800020f17880
x29: ffff800020f178e0 x28: 0000000000000000 x27: 1fffe0001c0e8543
x26: dfff800000000000 x25: ffff7000041e2f10 x24: ffff800020f178a0
x23: ffff0000e0742a18 x22: 0000000000000000 x21: ffff0000f7f08000
x20: ffff800020f17c20 x19: 0000000000000060 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082d93d8 x15: 0000000000000002
x14: 0000000000000001 x13: 1fffe0001efe1013 x12: 0000000000080000
x11: 00000000000002fd x10: ffff80002921c000 x9 : ffff800010f16ffc
x8 : 00000000000002fe x7 : ffff80000fd55d00 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff800020f176a0 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 pn_socket_autobind net/phonet/socket.c:213 [inline]
 pn_socket_sendmsg+0x210/0x214 net/phonet/socket.c:422
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5c8/0x938 net/socket.c:2518
 ___sys_sendmsg net/socket.c:2572 [inline]
 __sys_sendmsg+0x288/0x374 net/socket.c:2601
 __do_sys_sendmsg net/socket.c:2610 [inline]
 __se_sys_sendmsg net/socket.c:2608 [inline]
 __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2608
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: aa1603e0 97c37a51 17ffffc1 97c379d6 (d4210000) 
---[ end trace 0000000000000000 ]---