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Re: Fwd: Crashing the Linux System
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From: |
Greg Wooledge |
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Subject: |
Re: Fwd: Crashing the Linux System |
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Date: |
Sat, 17 Jun 2023 10:17:10 -0400 |
On Sat, Jun 17, 2023 at 09:09:23AM +0530, LitHack wrote:
> Running the yes command in command substitution will crash the linux shell.
Not surprising, really. You're trying to capture and store an
infinite number of bytes in memory. Eventually, either the malloc is
going to fail due to lack of virtual memory, or the Linux OOM (Out Of
Memory) Killer is going to step in and start killing random processes.
> According to me inside command the substitution it is creating multiple
> process(fork). Command: `yes` or $(yes)
The command substitution only creates one new process, but that process
will try to consume an infinite amount of memory.