Starting network: [    0.174025] macb 43080000.ethernet eth0: tracing fwnode_get_phy_node IS_ERR(phy_fwnode) 0
[    0.174025] macb 43080000.ethernet eth0: tracing  fwnode_phy_find_device 0
[    0.174025] Generic PHY 43080000.ethernet-ffffffff:07: trace using_genphy  1 
[    0.174025] macb: tracing macb_mdio_wait_for_idle -110
[    0.174025] macb 43080000.ethernet eth0: tracing  phy_attach_direct -110
[    0.174025] macb 43080000.ethernet eth0: Could not attach PHY (-110) and NULL == dn 0 
ip: SIOCSIFFLAGS: Connection timed out
FAIL
Starting dropbear sshd: [    0.174025] random: dropbear: uninitialized urandom read (32 bytes read)
OK

Welcome to Buildroot
buildroot login: root
Password: 
# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
    link/ether d6:4e:43:b5:42:1c brd ff:ff:ff:ff:ff:ff
3: sit0@NONE: <NOARP> mtu 1480 qdisc noop qlen 1000
    link/sit 0.0.0.0 brd 0.0.0.0
# ip link set eth0 up
[    0.174025] macb 43080000.ethernet eth0: tracing fwnode_get_phy_node IS_ERR(phy_fwnode) 0
[    0.174025] macb 43080000.ethernet eth0: tracing  fwnode_phy_find_device 0
[    0.174025] Generic PHY 43080000.ethernet-ffffffff:07: trace using_genphy  0 
[    0.174025] Generic PHY 43080000.ethernet-ffffffff:07: tracing phy_init_hw 0 
[    0.174025] Generic PHY 43080000.ethernet-ffffffff:07: tracing phy_disable_interrupts 0 
[    0.174025] tracing phy_modify phydev->mdio.addr 7 
[    0.174025] macb: tracing macb_mdio_wait_for_idle -110
[    0.174025] macb 43080000.ethernet eth0: tracing  phy_attach_direct 0
[    0.174025] macb 43080000.ethernet eth0: validation of rgmii with support 0000000,00000000,000002c0 and advertisement 0000000,00000000,00000000 failed: -22
[    0.174025] macb 43080000.ethernet eth0: tracing  phylink_bringup_phy -22
[    0.174025] tracing phy_modify phydev->mdio.addr 7 
[    0.174025] macb: tracing macb_mdio_wait_for_idle -110
[    0.174025] Unable to handle kernel access to user memory without uaccess routines at virtual address 0000000000000030
[    0.174025] Oops [#1]
[    0.174025] Modules linked in:
[    0.174025] CPU: 1 PID: 113 Comm: ip Not tainted 5.14.0 #102
[    0.174025] Hardware name: sifive,hifive-unleashed-a00 (DT)
[    0.174025] epc : klist_put+0x1a/0x84
[    0.174025]  ra : klist_remove+0x86/0xe8
[    0.174025] epc : ffffffff80269146 ra : ffffffff80269274 sp : ffffffd0042cb9b0
[    0.174025]  gp : ffffffff816dc9a0 tp : ffffffe07ffe4600 t0 : ffffffd0042cbd28
[    0.174025]  t1 : 0000000000000063 t2 : 00000000000dc840 s0 : ffffffd0042cb9e0
[    0.174025]  s1 : 0000000000000000 a0 : 0000000000000000 a1 : 0000000000000001
[    0.174025]  a2 : ffffffff81690808 a3 : 0000000000000000 a4 : 0000000000000001
[    0.174025]  a5 : 0000000000000000 a6 : c0000000ffffefff a7 : 0000000000000033
[    0.174025]  s2 : ffffffe081210158 s3 : ffffffff81690808 s4 : 0000000000000001
[    0.174025]  s5 : 0000000000000001 s6 : 0000000000000003 s7 : 0000000000000002
[    0.174025]  s8 : ffffffe080ff87b8 s9 : ffffffe080ff8780 s10: 0000000000000000
[    0.174025]  s11: 0000003fff823d40 t3 : 0000000000000037 t4 : 0000000000000030
[    0.174025]  t5 : ffffffffffffffff t6 : 0000000000000033
[    0.174025] status: 0000000200000120 badaddr: 0000000000000030 cause: 000000000000000d
[    0.174025] [<ffffffff80269146>] klist_put+0x1a/0x84
[    0.174025] [<ffffffff80269274>] klist_remove+0x86/0xe8
[    0.174025] [<ffffffff8040e5b2>] device_release_driver_internal+0xd2/0x108
[    0.174025] [<ffffffff8040e5f8>] device_release_driver+0x10/0x18
[    0.174025] [<ffffffff804673ca>] phy_detach+0x86/0xe4
[    0.174025] [<ffffffff80462146>] phylink_fwnode_phy_connect+0xea/0x1ea
[    0.174025] [<ffffffff80462256>] phylink_of_phy_connect+0x10/0x18
[    0.174025] [<ffffffff8046e522>] macb_phylink_connect+0x32/0xc8
[    0.174025] [<ffffffff80470c82>] macb_open+0x1fe/0x3e8
[    0.174025] [<ffffffff8053214e>] __dev_open+0xa8/0x10e
[    0.174025] [<ffffffff805324cc>] __dev_change_flags+0x166/0x1c0
[    0.174025] [<ffffffff80532544>] dev_change_flags+0x1e/0x54
[    0.174025] [<ffffffff805b599a>] devinet_ioctl+0x1f2/0x664
[    0.174025] [<ffffffff805b73f4>] inet_ioctl+0x90/0x118
[    0.174025] [<ffffffff8050d3ae>] sock_ioctl+0x1b8/0x328
[    0.174025] [<ffffffff80137d80>] sys_ioctl+0xb4/0x7e6
[    0.174025] [<ffffffff800030b2>] ret_from_syscall+0x0/0x2
[    0.174025] ---[ end trace daee3cfade5acdcd ]---
Segmentation fault
# ip [    0.174025] random: fast init done
a