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| author | Zhang Yanmin | 2005-05-23 02:47:00 +0200 |
|---|---|---|
| committer | Tony Luck | 2005-05-26 19:19:07 +0200 |
| commit | d11cf326bd5e785cc5a3f5a3d3f4e3a5522f4fb7 (patch) | |
| tree | 56912a4b84f6db3aa1d615a4174b2c2845fe870e /arch/ia64/kernel/sys_ia64.c | |
| parent | [IA64] initialize spinlock pfm_alt_install_check (diff) | |
| download | kernel-qcow2-linux-d11cf326bd5e785cc5a3f5a3d3f4e3a5522f4fb7.tar.gz kernel-qcow2-linux-d11cf326bd5e785cc5a3f5a3d3f4e3a5522f4fb7.tar.xz kernel-qcow2-linux-d11cf326bd5e785cc5a3f5a3d3f4e3a5522f4fb7.zip | |
[IA64] sys_mmap doesn't follow posix.1 when parameter len=0
In IA64 kernel, sys_mmap calls do_mmap2 and do_mmap2 returns addr if
len=0, which means the mmap sys call succeeds.
Posix.1 says:
The mmap() function shall fail if:
[EINVAL] The value of len is zero.
Here is a patch to fix it.
Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com>
Acked-by: David Mosberger <davidm@hpl.hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/sys_ia64.c')
| -rw-r--r-- | arch/ia64/kernel/sys_ia64.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c index a8cf6d8a509c..770fab37928e 100644 --- a/arch/ia64/kernel/sys_ia64.c +++ b/arch/ia64/kernel/sys_ia64.c @@ -182,13 +182,6 @@ do_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, un } } - /* - * A zero mmap always succeeds in Linux, independent of whether or not the - * remaining arguments are valid. - */ - if (len == 0) - goto out; - /* Careful about overflows.. */ len = PAGE_ALIGN(len); if (!len || len > TASK_SIZE) { |