Kernel warning “jump label: negative count” with Drive OS 5.2.6

Background: This (Kernel warning "jump label: negative count") post presents a kernel bug in Drive OS 5.2.0 that causes /var/log/kern.log and /var/log/syslog to be spammed with repeated errors from the kernel saying jump label: negative count among other info. That post provides a patch and instructions to fix the bug. We have been seeing a very similar looking error on systems running Drive OS 5.2.6.

My Question Did Nvidia fix the bug that linked post refers to in the Drive OS 5.2.6 release? I checked the source code and nvmap_init_t19x.c and nvmap_cache_t19x.c do not change between the 5.2.0 and 5.2.6 releases, but perhaps the bug was fixed elsewhere? I am wondering because I would like to know whether applying this patch as described in that post to the 5.2.6 release is recommended.

Please provide the following info (check/uncheck the boxes after creating this topic):
Software Version
DRIVE OS Linux 5.2.6
DRIVE OS Linux 5.2.6 and DriveWorks 4.0
DRIVE OS Linux 5.2.0
DRIVE OS Linux 5.2.0 and DriveWorks 3.5
NVIDIA DRIVE™ Software 10.0 (Linux)
NVIDIA DRIVE™ Software 9.0 (Linux)
other DRIVE OS version

Target Operating System

Hardware Platform
NVIDIA DRIVE™ AGX Xavier DevKit (E3550)
NVIDIA DRIVE™ AGX Pegasus DevKit (E3550)

SDK Manager Version

Host Machine Version
native Ubuntu 18.04

Dear @aarmbruster,
This issues is not fixed in DRIVE OS 5.2.6.

Dear @aarmbruster,
The fix is implemented in later release and is not part of DRIVE OS 5.2.6. Please try the patch given in post and let us know

Will do.

The patch in that post appears to have fixed the problem, thanks.

1 Like

Dear @aarmbruster,
Thanks for the update