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Fix aio_suspend in 32-bit emulation

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An off-by-one error has been present since the system call was first present
in 185878.  It additionally became a memory corruption bug after change
324941.  The failure is actually revealed by our existing AIO tests.
However, apparently nobody's been running those in 32-bit emulation mode.

Reported by:	Coverity, cem
CID:		1382114
MFC after:	18 days
X-MFC-With:	324941
Sponsored by:	Spectra Logic Corp
This commit is contained in:
Alan Somers 2017-10-26 19:45:15 +00:00
parent 9a8ce256ed
commit df485bdb3c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=325018
1 changed files with 1 additions and 1 deletions
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2
sys/kern/vfs_aio.c
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@ -2814,7 +2814,7 @@ freebsd32_aio_suspend(struct thread *td, struct freebsd32_aio_suspend_args *uap)
error = copyin(uap->aiocbp, ujoblist32, uap->nent *
sizeof(ujoblist32[0]));
if (error == 0) {
for (i = uap->nent; i > 0; i--)
for (i = uap->nent - 1; i >= 0; i--)
ujoblist[i] = PTRIN(ujoblist32[i]);
error = kern_aio_suspend(td, uap->nent, ujoblist, tsp);