Date: Tue, 8 Aug 2000 18:57:11 -0700 (PDT) From: Tor Egge <tegge@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern vfs_syscalls.c Message-ID: <200008090157.SAA20408@freefall.freebsd.org>
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tegge 2000/08/08 18:57:11 PDT
Modified files:
sys/kern vfs_syscalls.c
Log:
Don't set flags on the mount structure before all permission checks have
been done.
Don't allow multiple mount operations with MNT_UPDATE at the same
time on the same mount point. When the first mount operation
completed, MNT_UPDATE was cleared in the mount structure, causing
the second to complete as if it was a no-update mount operation
with the following bad side effects:
- mount structure inserted multiple times onto the mountlist
- vp->v_mountedhere incorrectly set, causing next namei
operation walking into the mountpoint to crash with
a locking against myself panic.
Plug a vnode leak in case vinvalbuf fails.
Revision Changes Path
1.163 +20 -5 src/sys/kern/vfs_syscalls.c
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