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	Commit message (Collapse)	Author	Age	Files	Lines
*	stdlib: Fix BZ #26241 testcase on GNU/Hurd	Samuel Thibault	2021-03-24	1	-3/+4
\| \| \| \| \| \| \| \|	GNU/Hurd's readlink system call is partly implemented in userspace, which also allocates a buffer on the stack for the result, and thus needs one more path. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
*	stdlib: Add testcase for BZ #26241	Adhemerval Zanella	2021-01-20	1	-0/+101
	Old implementation of realpath allocates a PATH_MAX using alloca for each symlink in the path, leading to MAXSYMLINKS times PATH_MAX maximum stack usage. The test create a symlink with __eloop_threshold() loops and creates a thread with minimum stack size (obtained through support_small_stack_thread_attribute). The thread issues a stack allocations that fill the thread allocated stack minus some slack plus and the realpath usage (which assumes a bounded stack usage). If realpath uses more than about 2 * PATH_MAX plus some slack it triggers a stackoverflow. Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: DJ Delorie <dj@redhat.com>