Marc Dionne e37d22f23e afs: Don't cross .backup mountpoint from backup volume ... commit 29be9100aca2915fab54b5693309bc42956542e5 upstream. Don't cross a mountpoint that explicitly specifies a backup volume (target is <vol>.backup) when starting from a backup volume. It it not uncommon to mount a volume's backup directly in the volume itself. This can cause tools that are not paying attention to get into a loop mounting the volume onto itself as they attempt to traverse the tree, leading to a variety of problems. This doesn't prevent the general case of loops in a sequence of mountpoints, but addresses a common special case in the same way as other afs clients. Reported-by: Jan Henrik Sylvester <jan.henrik.sylvester@uni-hamburg.de> Link: http://lists.infradead.org/pipermail/linux-afs/2024-May/008454.html Reported-by: Markus Suvanto <markus.suvanto@gmail.com> Link: http://lists.infradead.org/pipermail/linux-afs/2024-February/008074.html Signed-off-by: Marc Dionne <marc.dionne@auristor.com> Signed-off-by: David Howells <dhowells@redhat.com> Link: https://lore.kernel.org/r/768760.1716567475@warthog.procyon.org.uk Reviewed-by: Jeffrey Altman <jaltman@auristor.com> cc: linux-afs@lists.infradead.org Signed-off-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-11-19 12:27:12 +01:00
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addr_list.c
afs.h
afs_cm.h
afs_fs.h
afs_vl.h
cache.c
callback.c
cell.c
cmservice.c
dir.c
dir_edit.c
dir_silly.c
dynroot.c
file.c
flock.c
fs_operation.c
fs_probe.c
fsclient.c
inode.c
internal.h
Kconfig
main.c
Makefile
misc.c
mntpt.c	afs: Don't cross .backup mountpoint from backup volume	2024-11-19 12:27:12 +01:00
proc.c
protocol_uae.h
protocol_yfs.h
rotate.c
rxrpc.c
security.c
server.c
server_list.c
super.c
vl_alias.c
vl_list.c
vl_probe.c
vl_rotate.c
vlclient.c
volume.c
write.c
xattr.c
xdr_fs.h
yfsclient.c