What does "BUG: scheduling while atomic" mean and how do we get rid of that in ConnectPort LTS 32?

Here’s what Syslog reports about that issue which happens on all our ConnectPort LTS 32.

All units have been updated to the latest firmware version.

All ports use the UDP Socket Profile.

Problem initially showed up when all ports were configured at 1800bps. We changed speed for some but the problem remained.

Communication on the network side is done by a software simulator.

2019-02-04 13:55:33 User.Error 10.1.1.50 Feb 4 13:55:02 kernel: BUG: scheduling while atomic: lts.port/685/0x00000100
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: NIP: c01c0a74 LR: c01a9518 CTR: c01c0a44
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: REGS: ce7779a0 TRAP: 0901 Tainted: G D (2.6.25)
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: MSR: 00009032 CR: 84224088 XER: 00000000
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: TASK = ce71c7e0[685] ‘lts.port’ THREAD: ce776000
2019-02-04 13:55:33 User.Info 10.1.1.50 Feb 4 13:55:02 kernel: GPR00: 7c6df104 ce777a50 ce71c7e0 cf9d8e5c ce76c118 00000000 c036ec68 00000000
2019-02-04 13:55:33 User.Info 10.1.1.50 Feb 4 13:55:02 kernel: GPR08: 00000008 7c6df104 00000001 00000001 00000095
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: Call Trace:
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: [ce777a70] [c01a9518]
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: [ce777a90] [c01a4228]
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: [ce777ab0] [c007d7e4]
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: [ce777d90] [c007dcd8]
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: [ce777ef0] [c007e4c0]
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: [ce777f30] [c0004998]
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: [ce777f40] [c000fc58]
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: — Exception: c01Instruction dump:
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: 2c030000 9421ffe0 7c0802a6 bf61000c 90010024 41820024 80630134 2f830000
2019-02-04 13:55:33 User.Warning 10.1.1.50 Feb 4 13:55:02 kernel: 419e0018 3c007c6d 81230000 6000f104 <7f890000> 419e0020 3be00000 80010024