Subject says offlist, but this isn't... On Wed, Jul 04, 2018 at 08:33:20AM +0100, Peter Robinson wrote: > Sorry for the delay on this from my end. I noticed there was some bpf > bits land in the last net fixes pull request landed Monday so I built > a kernel with the JIT reenabled. It seems it's improved in that the > completely dead no output boot has gone but the original problem that > arrived in the merge window still persists: > > [ 17.564142] note: systemd-udevd[194] exited with preempt_count 1 > [ 17.592739] Unable to handle kernel NULL pointer dereference at > virtual address 0000000c > [ 17.601002] pgd = (ptrval) > [ 17.603819] [0000000c] *pgd=00000000 > [ 17.607487] Internal error: Oops: 805 [#10] SMP ARM > [ 17.612396] Modules linked in: > [ 17.615484] CPU: 0 PID: 195 Comm: systemd-udevd Tainted: G D > 4.18.0-0.rc3.git1.1.bpf1.fc29.armv7hl #1 > [ 17.626056] Hardware name: Generic AM33XX (Flattened Device Tree) > [ 17.632198] PC is at sk_filter_trim_cap+0x218/0x2fc > [ 17.637102] LR is at (null) > [ 17.640086] pc : [<c0ab03b4>] lr : [<00000000>] psr: 60000013 > [ 17.646384] sp : cfe1dd48 ip : 00000000 fp : 00000000 > [ 17.651635] r10: d837e000 r9 : d833be00 r8 : 00000000 > [ 17.656887] r7 : 00000001 r6 : e003d000 r5 : 00000000 r4 : 00000000 > [ 17.663447] r3 : 00000007 r2 : 00000000 r1 : 00000000 r0 : 00000000 > [ 17.670009] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment > none > [ 17.677180] Control: 10c5387d Table: 8fe20019 DAC: 00000051 > [ 17.682956] Process systemd-udevd (pid: 195, stack limit = 0x(ptrval)) > [ 17.689518] Stack: (0xcfe1dd48 to 0xcfe1e000)
Can you provide a full disassembly of sk_filter_trim_cap from vmlinux (iow, annotated with its linked address) for the above dump please - alternatively a new dump with matching disassembly. Thanks. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 13.8Mbps down 630kbps up According to speedtest.net: 13Mbps down 490kbps up
