NULL dereference in console_write

[SnodBlatter]

Upon closing Netsurf the screen turned white, but moving the cursor around left "refreshed" squares behind which showed the desktop. Deskbar was still responding so I tried to reboot but nothing happened. Hit ctrl+alt+delete (I don't even know if that does anything in Haiku!) and the panic scrolled down the screen. See attached picture.

Specs:

hrev53230

1.3GHz Tualatin Celeron @ 1.6GHz

Asus P2B-F

512MB memory

GF4 MX460

ES1371 sound card

Intel Pro 100 NIC

Currently rolled back to hrev53047 which is rock solid in comparison.

[SnodBlatter]

backtrace

[waddlesplash]

The backtrace is a bit cut off. Can you try to take a picture with the bottom visible, too?

[waddlesplash]

When you say "since June", can you give a more specific hrev or a date that the crashes started occurring on? hrev53225 is a potential culprit but was merged on 1 July.

[waddlesplash]

Ah, probably hrev53172 is the real culprit.

[SnodBlatter]

hrev53047 is fine, hrev53092 also appears to work fine. I often don't use this machine for 2-3 weeks so it could be any version since then that started it.

Attached are three more panics, the name of the file is what I was running when it happened. Larger programs really speed up the process, if I boot to desktop and run Netsurf then it'll last about 2 minutes before panicking, HaikuDepot is about 45 seconds and never fully loads. HaikuDepot is also finicky on hrev53092 though.. Sitting at desktop lasted at least 5 minutes until I launched mediaplayer.

[waddlesplash]

MediaPlayer picture is actually an app_server crash, not a KDL, so this appears unrelated.

[waddlesplash]

HaikuDepot picture is #14928, so also unrelated.

[waddlesplash]

And the NetSurf picture is also #14928. So, out of all these pictures, only the first one you attached is actually a relevant KDL :)

[korli]

src/bin/consoled/consoled.cpp:	con->console_writer = spawn_thread(&console_writer, "console writer",
src/tests/apps/miniterminal/MiniView.cpp:	fConsoleWriter = spawn_thread(&MiniView::ConsoleWriter, "console writer", B_URGENT_DISPLAY_PRIORITY, this);

[korli]

Seems like a bug in the console driver.

[korli]

how to reproduce:

sh -c "cat /dev/zero > /dev/console &" ; echo hello > /dev/console

[korli]

see ​https://review.haiku-os.org/c/haiku/+/1566

[waddlesplash]

Fix merged in hrev53237.

[nielx]

Assign tickets with status=closed and resolution=fixed within the R1/beta2 development window to the R1/beta2 Milestone