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| author | David Howells <dhowells@redhat.com> | 2020-06-24 19:00:24 +0300 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2020-06-30 22:37:02 +0300 |
| commit | bfd4981fe3d64b49662920925fead26cf37c4834 (patch) | |
| tree | 7a29827cddbc9beff28d497a0f19e11b6648a20c /fs/afs | |
| parent | 5cee9e67596f7d694e94d7def7cd9d65a7599f66 (diff) | |
| download | linux-bfd4981fe3d64b49662920925fead26cf37c4834.tar.xz | |
afs: Fix storage of cell names
[ Upstream commit 719fdd32921fb7e3208db8832d32ae1c2d68900f ]
The cell name stored in the afs_cell struct is a 64-char + NUL buffer -
when it needs to be able to handle up to AFS_MAXCELLNAME (256 chars) + NUL.
Fix this by changing the array to a pointer and allocating the string.
Found using Coverity.
Fixes: 989782dcdc91 ("afs: Overhaul cell database management")
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/afs')
| -rw-r--r-- | fs/afs/cell.c | 9 | ||||
| -rw-r--r-- | fs/afs/internal.h | 2 |
2 files changed, 10 insertions, 1 deletions
diff --git a/fs/afs/cell.c b/fs/afs/cell.c index 78ba5f932287..296b489861a9 100644 --- a/fs/afs/cell.c +++ b/fs/afs/cell.c @@ -154,10 +154,17 @@ static struct afs_cell *afs_alloc_cell(struct afs_net *net, return ERR_PTR(-ENOMEM); } + cell->name = kmalloc(namelen + 1, GFP_KERNEL); + if (!cell->name) { + kfree(cell); + return ERR_PTR(-ENOMEM); + } + cell->net = net; cell->name_len = namelen; for (i = 0; i < namelen; i++) cell->name[i] = tolower(name[i]); + cell->name[i] = 0; atomic_set(&cell->usage, 2); INIT_WORK(&cell->manager, afs_manage_cell); @@ -203,6 +210,7 @@ parse_failed: if (ret == -EINVAL) printk(KERN_ERR "kAFS: bad VL server IP address\n"); error: + kfree(cell->name); kfree(cell); _leave(" = %d", ret); return ERR_PTR(ret); @@ -483,6 +491,7 @@ static void afs_cell_destroy(struct rcu_head *rcu) afs_put_vlserverlist(cell->net, rcu_access_pointer(cell->vl_servers)); key_put(cell->anonymous_key); + kfree(cell->name); kfree(cell); _leave(" [destroyed]"); diff --git a/fs/afs/internal.h b/fs/afs/internal.h index 555ad7c9afcb..7fe88d918b23 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -397,7 +397,7 @@ struct afs_cell { struct afs_vlserver_list __rcu *vl_servers; u8 name_len; /* Length of name */ - char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */ + char *name; /* Cell name, case-flattened and NUL-padded */ }; /* |