diff options
| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2019-05-05 07:34:13 -0500 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2019-05-05 07:34:13 -0500 |
| commit | 4a696f5ebd6bb22258e32b409134f57bd97fe7ed (patch) | |
| tree | 32c711be07cab4038a7697deba01df3cdb8059a1 /man2 | |
| parent | c7dc46d0a278cdeeb37107727bcf0bfe58d53ab6 (diff) | |
| download | man-pages-4a696f5ebd6bb22258e32b409134f57bd97fe7ed.tar.gz | |
execve.2: Note that stack+environ size is also limited to 3/4 of _STK_LIM
In fs/exec.c::prepare_arg_pages(), we have:
limit = _STK_LIM / 4 * 3;
limit = min(limit, bprm->rlim_stack.rlim_cur / 4);
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Diffstat (limited to 'man2')
| -rw-r--r-- | man2/execve.2 | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/man2/execve.2 b/man2/execve.2 index 082bcb1a4c..25360ceb15 100644 --- a/man2/execve.2 +++ b/man2/execve.2 @@ -387,6 +387,10 @@ stack size. ensures that the new program always has some stack space.) .\" Ollie: That doesn't include the lists of pointers, though, .\" so the actual usage is a bit higher (1 pointer per argument). +Additionally, the total size is limited to 3/4 of the value +of the kernel constant +.B _STK_LIM +(8 Mibibytes). Since Linux 2.6.25, the kernel places a floor of 32 pages on this size limit, so that, even when |