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| author | Ayush Ranjan <ayushranjan@google.com> | 2021-11-01 16:48:16 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2021-11-01 16:51:12 -0700 |
| commit | 58017e655399384afed2cedea0e269cb1ad2dd7e (patch) | |
| tree | 7612b782dcde958ac12f8844ebff893e01bd3b1b /pkg | |
| parent | 9776edb3fa9e67a28182aedc9342ef9c1b556d7c (diff) | |
Handle UMOUNT_NOFOLLOW in VFS2 umount(2).
Reported-by: syzbot+f9ecb181a4b3abdde9b9@syzkaller.appspotmail.com
Reported-by: syzbot+8c5cb9d7a044a91a513b@syzkaller.appspotmail.com
PiperOrigin-RevId: 406951359
Diffstat (limited to 'pkg')
| -rw-r--r-- | pkg/sentry/syscalls/linux/vfs2/mount.go | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/pkg/sentry/syscalls/linux/vfs2/mount.go b/pkg/sentry/syscalls/linux/vfs2/mount.go index 4d73d46ef..fd0ab4c76 100644 --- a/pkg/sentry/syscalls/linux/vfs2/mount.go +++ b/pkg/sentry/syscalls/linux/vfs2/mount.go @@ -136,14 +136,14 @@ func Umount2(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca if err != nil { return 0, nil, err } - tpop, err := getTaskPathOperation(t, linux.AT_FDCWD, path, disallowEmptyPath, nofollowFinalSymlink) + tpop, err := getTaskPathOperation(t, linux.AT_FDCWD, path, disallowEmptyPath, shouldFollowFinalSymlink(flags&linux.UMOUNT_NOFOLLOW == 0)) if err != nil { return 0, nil, err } defer tpop.Release(t) opts := vfs.UmountOptions{ - Flags: uint32(flags), + Flags: uint32(flags &^ linux.UMOUNT_NOFOLLOW), } return 0, nil, t.Kernel().VFS().UmountAt(t, creds, &tpop.pop, &opts) |