Red Hat Bugzilla – Bug 427296
"Leave message" accepts very large input that can kill system perf
Last modified: 2015-01-14 18:20:21 EST
Description of problem:
The "Leave a message" functionality when the screensaver is activated does not
limit the length of input which can cause the notification-daemon to go berserk.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Input 8 chars
2. CTRL-A, CTRL-C, CTRL-END, CTRL-V
4. repeat step 2 until text selection slows down too much... (>10s and around
>64MB worth of input?)
Once screen unlocked, notification-daemon virtual memory linearly increases from
~1GB to ~2GB of RAM and CPU usage eventually shots over 20. Process
notification-daemon needs to be killed to return system to normal.
Unauthenticated persons should not be able to kill system performance by giving
1) make the dialog box limited in text length
2) make notification daemon handle large messages sanely (drop it, or cut it
Yeah, makes sense to limit the input size somehow.
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