From 8e86549d1417a4618ab98d10aaba427350b321c6 Mon Sep 17 00:00:00 2001 From: John David Anglin Date: Wed, 29 Jan 2025 16:51:16 -0500 Subject: [PATCH] nptl: Correct stack size attribute when stack grows up [BZ #32574] Set stack size attribute to the size of the mmap'd region only when the size of the remaining stack space is less than the size of the mmap'd region. This was reversed. As a result, the initial stack size was only 135168 bytes. On architectures where the stack grows down, the initial stack size is approximately 8384512 bytes with the default rlimit settings. The small main stack size on hppa broke applications like ruby that check for stack overflows. Signed-off-by: John David Anglin --- nptl/pthread_getattr_np.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/nptl/pthread_getattr_np.c b/nptl/pthread_getattr_np.c index e98e2df152..43dd16d59c 100644 --- a/nptl/pthread_getattr_np.c +++ b/nptl/pthread_getattr_np.c @@ -145,9 +145,9 @@ __pthread_getattr_np (pthread_t thread_id, pthread_attr_t *attr) > (size_t) iattr->stackaddr - last_to) iattr->stacksize = (size_t) iattr->stackaddr - last_to; #else - /* The limit might be too high. */ + /* The limit might be too low. */ if ((size_t) iattr->stacksize - > to - (size_t) iattr->stackaddr) + < to - (size_t) iattr->stackaddr) iattr->stacksize = to - (size_t) iattr->stackaddr; #endif /* We succeed and no need to look further. */