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Bug #5944

closed

crash against latest media-tree?

Added by th0ma7 ^ over 4 years ago. Updated about 4 years ago.

Status:
Invalid
Priority:
Normal
Assignee:
-
Category:
Crashes
Target version:
-
Start date:
2020-08-25
Due date:
% Done:

0%

Estimated time:
Found in version:
4.3~ce09077
Affected Versions:

Description

I've been hitting a crash with the latest snapshot of the media-tree (for details see thread at https://www.spinics.net/lists/linux-media/msg175724.html)

Interestingly the bug is triggerred "by" tvheadend while not necessarely being the root-cause neither:
[42655.375808] kernel tried to execute NX-protected page - exploit attempt? (uid: 276776)
[42655.384655] BUG: unable to handle kernel paging request at ffff8803f8e18000
...
[42658.950335] note: tvheadend[21050] exited with preempt_count 1

Today tvheadend crashed for apparently no reason on my box and generated a 2.5Gb dump. Interestingly, I'm exclusively running TVH against dual/quad hdhomerun but I had a few high-level media-tree kernel modules loaded in memory, although nothing related tuners or dvbs (e.g. only had rc-core.ko, mc.ko, videodev.ko, tveeprom.ko, videobuf2-*.ko).

I'm running the latest TVH github snapshot (4.3~ce09077) provided through SynoCommunity on apollolake Intel 64-bit arch (and I'm the SynoCommunity package maintainer as wel) and has been really stable for me in the past months up until playing with the media-tree in the last two days.

Question is: I'm seeking advice as to could tvheadend have an incompatibility of some sort with OR trigering an existing flaw/flacky code from the latest media-tree snapshot.

Thnx in advance.

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