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| author | Konstantin Belousov <kib@FreeBSD.org> | 2011-03-28 13:21:26 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2011-03-28 13:21:26 +0000 |
| commit | 937060a8433525dc6ed7857ffd2b661719a5683c (patch) | |
| tree | 3b999fcf1064d910dfbb09855482d5d2884848d0 /sys/kern | |
| parent | 0f502d1c4e60dc883af7dfc7833956d62db9ff69 (diff) | |
| download | src-937060a8433525dc6ed7857ffd2b661719a5683c.tar.gz src-937060a8433525dc6ed7857ffd2b661719a5683c.zip | |
Handle zero length in copyout_unmap().
Submitted by: John Wehle <john feith com>
MFC after: 2 weeks
Notes
Notes:
svn path=/head/; revision=220101
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/subr_uio.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/kern/subr_uio.c b/sys/kern/subr_uio.c index 8304aeaf2d80..d8fa68f37e0b 100644 --- a/sys/kern/subr_uio.c +++ b/sys/kern/subr_uio.c @@ -498,6 +498,9 @@ copyout_unmap(struct thread *td, vm_offset_t addr, size_t sz) vm_map_t map; vm_size_t size; + if (sz == 0) + return (0); + map = &td->td_proc->p_vmspace->vm_map; size = (vm_size_t) round_page(sz); |