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| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/spawni.c | 5 |
2 files changed, 11 insertions, 0 deletions
@@ -1,3 +1,9 @@ +2017-04-03 Mike Frysinger <vapier@gentoo.org> + + [BZ #21253] + * sysdeps/unix/sysv/linux/spawni.c (__spawnix): Increase argv_size + slack space by 32KiB. + 2017-04-03 Wladimir van der Laan <laanwj@gmail.com> [BZ# 21338] diff --git a/sysdeps/unix/sysv/linux/spawni.c b/sysdeps/unix/sysv/linux/spawni.c index c96aac8..29d8f25 100644 --- a/sysdeps/unix/sysv/linux/spawni.c +++ b/sysdeps/unix/sysv/linux/spawni.c @@ -319,6 +319,11 @@ __spawnix (pid_t * pid, const char *file, /* Add a slack area for child's stack. */ size_t argv_size = (argc * sizeof (void *)) + 512; + /* We need at least a few pages in case the compiler's stack checking is + enabled. In some configs, it is known to use at least 24KiB. We use + 32KiB to be "safe" from anything the compiler might do. Besides, the + extra pages won't actually be allocated unless they get used. */ + argv_size += (32 * 1024); size_t stack_size = ALIGN_UP (argv_size, GLRO(dl_pagesize)); void *stack = __mmap (NULL, stack_size, prot, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0); |