Using kernels 3.11.9-300 and 3.11.10-301 on a BeagleBone Black Cortex A8 board, I get a kernel Oops every time I try to make an outgoing SSH connection. Earlier kernels worked OK. The Oops report from /var/log/messages is as follows: Dec 13 09:17:05 beagle kernel: [ 157.924918] Unable to handle kernel NULL pointer dereference at virtual address 00000000 Dec 13 09:17:05 beagle kernel: [ 157.933472] pgd = dbe6c000 Dec 13 09:17:05 beagle kernel: [ 157.936323] [00000000] *pgd=00000000 Dec 13 09:17:05 beagle kernel: [ 157.940106] Internal error: Oops: 5 [#1] SMP ARM Dec 13 09:17:05 beagle kernel: [ 157.944969] Modules linked in: nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6t_REJECT omapdss(+) xt_conntrack cfg80211 rfkill ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw snd_soc_omap snd_soc_core snd_compress vfat fat ac97_bus snd_seq snd_seq_device snd_pcm snd_page_alloc tps65217_regulator snd_timer snd omap_wdt soundcore nfsd mmc_block Dec 13 09:17:05 beagle kernel: [ 158.003714] CPU: 0 PID: 978 Comm: ssh Not tainted 3.11.10-301.fc20.armv7hl #1 Dec 13 09:17:05 beagle kernel: [ 158.011234] task: dbb40480 ti: dc56e000 task.ti: dc56e000 Dec 13 09:17:05 beagle kernel: [ 158.016943] PC is at __list_add+0x34/0xa4 Dec 13 09:17:05 beagle kernel: [ 158.021185] LR is at __down_write_nested+0x48/0xa0 Dec 13 09:17:05 beagle kernel: [ 158.026237] pc : [<c02c1f68>] lr : [<c05c2abc>] psr: 600f0093 Dec 13 09:17:05 beagle kernel: [ 158.026237] sp : dc56ff08 ip : 00000000 fp : b7392570 Dec 13 09:17:05 beagle kernel: [ 158.038328] r10: 00000200 r9 : c09184c8 r8 : 00000002 Dec 13 09:17:05 beagle kernel: [ 158.043833] r7 : dbb40480 r6 : dc56ff20 r5 : c095d438 r4 : 00000000 Dec 13 09:17:05 beagle kernel: [ 158.050709] r3 : 00000000 r2 : c095d438 r1 : 00000000 r0 : dc56ff20 Dec 13 09:17:05 beagle kernel: [ 158.057587] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user Dec 13 09:17:05 beagle kernel: [ 158.065196] Control: 10c5387d Table: 9be6c019 DAC: 00000015 Dec 13 09:17:05 beagle kernel: [ 158.071249] Process ssh (pid: 978, stack limit = 0xdc56e240) Dec 13 09:17:05 beagle kernel: [ 158.077211] Stack: (0xdc56ff08 to 0xdc570000) Dec 13 09:17:05 beagle kernel: [ 158.081808] ff00: dc56ff20 00000000 c095d430 c095d434 600f0013 c05c2abc Dec 13 09:17:05 beagle kernel: [ 158.090430] ff20: c095d430 00000000 dbb40480 00000000 00000000 000003e8 dc56e008 c095d350 Dec 13 09:17:05 beagle kernel: [ 158.099053] ff40: dbd76b80 c0258208 ffffffff c00b04f4 dc57c800 c00b0340 c097b320 dc56ff64 Dec 13 09:17:05 beagle kernel: [ 158.107674] ff60: 00000010 7265705f 74736973 2e746e65 30303031 dc56ff00 00000137 dc56e000 Dec 13 09:17:05 beagle kernel: [ 158.116295] ff80: dc56e000 271ae616 fffffffe b7392c2c beb23cac 5fb11c00 00000137 c000e904 Dec 13 09:17:05 beagle kernel: [ 158.124915] ffa0: dc56e000 c000e8e8 b7392c2c beb23cac 00000016 000003e8 fffffffe 00000000 Dec 13 09:17:05 beagle kernel: [ 158.133534] ffc0: b7392c2c beb23cac 5fb11c00 00000137 00000000 b7392670 beb23d34 b7392570 Dec 13 09:17:05 beagle kernel: [ 158.142156] ffe0: beb23c88 beb23c78 b66a331c b6a7a960 600f0010 00000016 9fef6821 9fef6c21 Dec 13 09:17:05 beagle kernel: [ 158.150800] [<c02c1f68>] (__list_add+0x34/0xa4) from [<c05c2abc>] (__down_write_nested+0x48/0xa0) Dec 13 09:17:05 beagle kernel: [ 158.160165] [<c05c2abc>] (__down_write_nested+0x48/0xa0) from [<c0258208>] (keyctl_get_persistent+0xf0/0x274) Dec 13 09:17:05 beagle kernel: [ 158.170629] [<c0258208>] (keyctl_get_persistent+0xf0/0x274) from [<c000e8e8>] (__sys_trace_return+0x0/0x18) Dec 13 09:17:05 beagle kernel: [ 158.180909] [<c000e8e8>] (__sys_trace_return+0x0/0x18) from [<fffffffe>] (0xfffffffe) Dec 13 09:17:05 beagle kernel: [ 158.189166] Code: e59f0068 e1a03004 e59f2064 ebf615da (e5943000) Dec 13 09:17:05 beagle kernel: [ 158.195592] ---[ end trace b350fa760c1abd18 ]---
This is likely a generic bug. I've committed patches to fix it, but they won't make F20 GA. Should be in 3.12.5-301 or newer.
kernel-3.12.5-301.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/kernel-3.12.5-301.fc20
Package kernel-3.12.5-301.fc20: * should fix your issue, * was pushed to the Fedora 20 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing kernel-3.12.5-301.fc20' as soon as you are able to, then reboot. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2013-23445/kernel-3.12.5-301.fc20 then log in and leave karma (feedback).
Package kernel-3.12.5-302.fc20: * should fix your issue, * was pushed to the Fedora 20 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing kernel-3.12.5-302.fc20' as soon as you are able to, then reboot. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2013-23445/kernel-3.12.5-302.fc20 then log in and leave karma (feedback).
I tried updating to kernel-3.12.5-302.fc20.armv7hl.rpm, and I got the following, which doesn't look good. Now the board will not boot. I have not had time to investigate further. [root@beagle steveu]# yum localupdate kern*rpm Loaded plugins: langpacks, refresh-packagekit Examining kernel-3.12.5-302.fc20.armv7hl.rpm: kernel-3.12.5-302.fc20.armv7hl Marking kernel-3.12.5-302.fc20.armv7hl.rpm as an update to kernel-3.11.7-300.fc20.armv7hl Marking kernel-3.12.5-302.fc20.armv7hl.rpm as an update to kernel-3.11.9-300.fc20.armv7hl Marking kernel-3.12.5-302.fc20.armv7hl.rpm as an update to kernel-3.11.10-301.fc20.armv7hl Resolving Dependencies --> Running transaction check ---> Package kernel.armv7hl 0:3.12.5-302.fc20 will be installed --> Finished Dependency Resolution --> Running transaction check ---> Package kernel.armv7hl 0:3.11.7-300.fc20 will be erased --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: kernel armv7hl 3.12.5-302.fc20 /kernel-3.12.5-302.fc20.armv7hl 92 M Removing: kernel armv7hl 3.11.7-300.fc20 @updates-testing 92 M Transaction Summary ================================================================================ Install 1 Package Remove 1 Package Total size: 92 M Is this ok [y/d/N]: y Downloading packages: Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : kernel-3.12.5-302.fc20.armv7hl 1/2 Cleanup : kernel-3.11.7-300.fc20.armv7hl 2/2 dracut-install: ERROR: installing 'sgdisk' /usr/lib/dracut/dracut-install -D /var/tmp/initramfs.DeqtLj -a sgdisk /usr/sbin/prelink: /usr/lib/libc-2.18.so: Unknown arm relocation type 160 Image Name: 3.12.5-302.fc20.armv7hl Created: Fri Dec 20 23:17:45 2013 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 5065168 Bytes = 4946.45 kB = 4.83 MB Load Address: 00008000 Entry Point: 00008000 Image Name: initramfs Created: Fri Dec 20 23:17:48 2013 Image Type: ARM Linux RAMDisk Image (uncompressed) Data Size: 10471326 Bytes = 10225.90 kB = 9.99 MB Load Address: 00000000 Entry Point: 00000000 Verifying : kernel-3.12.5-302.fc20.armv7hl 1/2 Verifying : kernel-3.11.7-300.fc20.armv7hl 2/2 Removed: kernel.armv7hl 0:3.11.7-300.fc20 Installed: kernel.armv7hl 0:3.12.5-302.fc20 Complete! [root@beagle steveu]#
kernel-3.12.5-302.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.