Messages in this thread Patch in this message | | | Subject | [PATCH 2.6] fix mmap() return value to conform POSIX | From | Gordon Jin <> | Date | Tue, 15 Mar 2005 11:04:12 +0800 |
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This patch fixes 2 return values in mmap() to conform POSIX spec:
[EINVAL] The value of len is zero.
[ENOMEM] MAP_FIXED was specified, and the range [addr,addr+len) exceeds that allowed for the address space of a process; or, if MAP_FIXED was not specified and there is insufficient room in the address space to effect the mapping.
--- linux-2.6.11.3/mm/mmap.c.orig 2005-03-14 13:20:11.000000000 -0800 +++ linux-2.6.11.3/mm/mmap.c 2005-03-14 17:24:37.000000000 -0800 @@ -897,12 +897,12 @@ unsigned long do_mmap_pgoff(struct file prot |= PROT_EXEC; if (!len) - return addr; + return -EINVAL; /* Careful about overflows.. */ len = PAGE_ALIGN(len); if (!len || len > TASK_SIZE) - return -EINVAL; + return -ENOMEM; /* offset overflow? */ if ((pgoff + (len >> PAGE_SHIFT)) < pgoff)
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