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Do not try to increase the refcount of a NULL vnode

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osi_lookup is not guaranteed to give us a valid vnode, so
check before calling VN_HOLD().

Change-Id: I3d2a4d441f6991c08beccb6b10a428f5746db146
Reviewed-on: http://gerrit.openafs.org/1967
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
This commit is contained in:
Ben Kaduk 2010-05-15 17:11:15 -04:00 committed by Derrick Brashear
parent c0afd1419d
commit 0f36d82e89
1 changed files with 2 additions and 1 deletions
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3
src/afs/afs_pioctl.c
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@ -1133,7 +1133,8 @@ afs_syscall_pioctl(char *path, unsigned int com, caddr_t cmarg, int follow)
#else
code = gop_lookupname_user(path, AFS_UIOUSER, follow, &vp);
#if defined(AFS_FBSD80_ENV) /* XXX check on 7x */
VN_HOLD(vp);
if (vp != NULL)
VN_HOLD(vp);
#endif /* AFS_FBSD80_ENV */
#endif /* AFS_LINUX22_ENV */
#endif /* AFS_AIX41_ENV */