diff options
Diffstat (limited to 'libdiskfs/io-map.c')
| -rw-r--r-- | libdiskfs/io-map.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/libdiskfs/io-map.c b/libdiskfs/io-map.c index c9e897c6..6268f2c5 100644 --- a/libdiskfs/io-map.c +++ b/libdiskfs/io-map.c @@ -1,5 +1,5 @@ /* - Copyright (C) 1994 Free Software Foundation + Copyright (C) 1994, 1997 Free Software Foundation This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as @@ -44,13 +44,19 @@ diskfs_S_io_map (struct protid *cred, { case O_READ | O_WRITE: *wrobj = *rdobj = diskfs_get_filemap (node, VM_PROT_READ |VM_PROT_WRITE); + if (*wrobj == MACH_PORT_NULL) + goto error; mach_port_mod_refs (mach_task_self (), *rdobj, MACH_PORT_RIGHT_SEND, 1); break; case O_READ: *rdobj = diskfs_get_filemap (node, VM_PROT_READ); + if (*rdobj == MACH_PORT_NULL) + goto error; break; case O_WRITE: *wrobj = diskfs_get_filemap (node, VM_PROT_WRITE); + if (*wrobj == MACH_PORT_NULL) + goto error; break; } mutex_unlock (&node->lock); @@ -59,4 +65,9 @@ diskfs_S_io_map (struct protid *cred, *wrtype = MACH_MSG_TYPE_MOVE_SEND; return 0; + +error: + mutex_unlock (&node->lock); + return errno; } + |