Ulimit file size unlimited

There are understandably many related questions on stack allocation What and where are the stack and heap? Improve this question. Community Bot 1 1 1 silver badge. Brian Hawkins Brian Hawkins 2, 1 1 gold badge 23 23 silver badges 17 17 bronze badges. Add a comment. Active Oldest Votes.

Improve this answer. Alex V Alex V 3, 1 1 gold badge 26 26 silver badges 49 49 bronze badges. BasileStarynkevitch Damn. I think the point is made pretty clearly. If you want gcc to not optimize away the stack smashing for educational expirementation just compiled it with gcc -O0. Maxwell Two mistakes: the stack size limit has nothing to do with preventing the "whole system" from crashing.

Making a GB stack is no more harmful than allocating GB on the heap: the operations will either fail sbrk or exec fail , or there'll be an overcommit and processes will be killed when you use the memory until the system can honour its memory commitments again. In either case, the integrity of the whole system is safe. There's nothing a process can do to defeat the kernel. Maxwell Secondly, exceeding the stack size is a completely different problem to stack smashing. When a stack overflow happens, the kernel kills the process and that's that.

Nothing is written to the stack that shouldn't be, and no harm results apart from process termination. This answer is plain wrong. Each process on Linux has its own stack - no such thing as system stack space.

Stack grows downwards on x86 and an overflow occurs when the top of the stack physically the bottom of the stack memory hits the pre-set limit or meets another memory mapping.

Stack buffer overflows occur in the opposite direction. It would be hard to overwrite the return address if the stack would instead grow upwards. Show 4 more comments. That doesn't seem to be true. This is also the value printed by "ulimit -s". Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Learn more. Asked 6 years, 6 months ago. Active 6 years, 6 months ago. Viewed 51k times. Questions: Are changes made using ulimit command affect only current process, i. I launch a program from shell as a fore- or-background process.

Does the ulimit change apply for new process? How can I make that all user processes are affected with this configuration? Improve this question. Did you search for it before asking? Note: In case you want to put resource limit on a group instead of users, then it can also be possible via limit.

This command is very helpful for admins. This command helps in fixing many of the number of file limitations in Linux based servers. Example is shown in above guide. Your email address will not be published. Tags: ulimit linux servers. Raji June 29, at am.