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authorZhang Yanmin <yanmin.zhang@intel.com>2005-05-22 20:47:00 -0400
committerTony Luck <tony.luck@intel.com>2005-05-26 13:19:07 -0400
commitd11cf326bd5e785cc5a3f5a3d3f4e3a5522f4fb7 (patch)
tree56912a4b84f6db3aa1d615a4174b2c2845fe870e /arch/ia64/kernel/sys_ia64.c
parentfe12e25ebdd195a57d3fd655061fd2525609b16b (diff)
[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.c7
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
182 } 182 }
183 } 183 }
184 184
185 /*
186 * A zero mmap always succeeds in Linux, independent of whether or not the
187 * remaining arguments are valid.
188 */
189 if (len == 0)
190 goto out;
191
192 /* Careful about overflows.. */ 185 /* Careful about overflows.. */
193 len = PAGE_ALIGN(len); 186 len = PAGE_ALIGN(len);
194 if (!len || len > TASK_SIZE) { 187 if (!len || len > TASK_SIZE) {