Opened 13 months ago

Last modified 6 days ago

#15160 new bug

app_server: NULL dereference in SimpleTransform::Apply

Reported by: waddlesplash Owned by: axeld
Priority: normal Milestone: Unscheduled
Component: Servers/app_server Version: R1/Development
Keywords: Cc:
Blocked By: Blocking:
Platform: All

Description (last modified by pulkomandy)

Found by KapiX. Occurs reproducibly on scrolling down on http://1.1.1.1.

Attachments (1)

app_server-528-debug-13-07-2019-22-41-16.report (57.1 KB ) - added by waddlesplash 13 months ago.

Download all attachments as: .zip

Change History (8)

comment:1 by pulkomandy, 10 months ago

Description: modified (diff)

comment:2 by pulkomandy, 10 months ago

This is strange, the gradient itself is already checked for NULLness at this point (when reading it from the app_server link) and I don't see anything else that would be dynamically allocated.

comment:3 by waddlesplash, 10 months ago

Most likely something down the line is getting dynamically allocated; i.e. via inlining. The code looks like it's using a bunch of SSE here, which is indicative of a lot of math going on. Is it possible to run Web+ under test_app_server?

comment:4 by ambroff, 6 months ago

Can anyone else still reproduce this? I'm unable to. It's possible this got fixed at some point.

comment:5 by pulkomandy, 6 months ago

We have switched back from rpmalloc to hoard, so currently it will not be reproducible. However the missing error handling in app_server is likely still a problem

comment:6 by pulkomandy, 4 months ago

Milestone: R1/beta2R1/beta3

comment:7 by pulkomandy, 6 days ago

Milestone: R1/beta3Unscheduled

Moving out of beta3 milestone since it is not so easily reproductible with hoard malloc, making it less urgent to fix.

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