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linux/fs/cifs
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Paulo Alcantara 9ebaafec97 cifs: fix memory leak of smb3_fs_context_dup::server_hostname 
commit 869da64d071142d4ed562a3e909deb18e4e72c4e upstream.

Fix memory leak of smb3_fs_context_dup::server_hostname when parsing
and duplicating fs contexts during mount(2) as reported by kmemleak:

  unreferenced object 0xffff888125715c90 (size 16):
    comm "mount.cifs", pid 3832, jiffies 4304535868 (age 190.094s)
    hex dump (first 16 bytes):
      7a 65 6c 64 61 2e 74 65 73 74 00 6b 6b 6b 6b a5  zelda.test.kkkk.
    backtrace:
      [<ffffffff8168106e>] kstrdup+0x2e/0x60
      [<ffffffffa027a362>] smb3_fs_context_dup+0x392/0x8d0 [cifs]
      [<ffffffffa0136353>] cifs_smb3_do_mount+0x143/0x1700 [cifs]
      [<ffffffffa02795e8>] smb3_get_tree+0x2e8/0x520 [cifs]
      [<ffffffff817a19aa>] vfs_get_tree+0x8a/0x2d0
      [<ffffffff8181e3e3>] path_mount+0x423/0x1a10
      [<ffffffff8181fbca>] __x64_sys_mount+0x1fa/0x270
      [<ffffffff83ae364b>] do_syscall_64+0x3b/0x90
      [<ffffffff83c0007c>] entry_SYSCALL_64_after_hwframe+0x44/0xae
  unreferenced object 0xffff888111deed20 (size 32):
    comm "mount.cifs", pid 3832, jiffies 4304536044 (age 189.918s)
    hex dump (first 32 bytes):
      44 46 53 52 4f 4f 54 31 2e 5a 45 4c 44 41 2e 54  DFSROOT1.ZELDA.T
      45 53 54 00 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5  EST.kkkkkkkkkkk.
    backtrace:
      [<ffffffff8168118d>] kstrndup+0x2d/0x90
      [<ffffffffa027ab2e>] smb3_parse_devname+0x9e/0x360 [cifs]
      [<ffffffffa01870c8>] cifs_setup_volume_info+0xa8/0x470 [cifs]
      [<ffffffffa018c469>] connect_dfs_target+0x309/0xc80 [cifs]
      [<ffffffffa018d6cb>] cifs_mount+0x8eb/0x17f0 [cifs]
      [<ffffffffa0136475>] cifs_smb3_do_mount+0x265/0x1700 [cifs]
      [<ffffffffa02795e8>] smb3_get_tree+0x2e8/0x520 [cifs]
      [<ffffffff817a19aa>] vfs_get_tree+0x8a/0x2d0
      [<ffffffff8181e3e3>] path_mount+0x423/0x1a10
      [<ffffffff8181fbca>] __x64_sys_mount+0x1fa/0x270
      [<ffffffff83ae364b>] do_syscall_64+0x3b/0x90
      [<ffffffff83c0007c>] entry_SYSCALL_64_after_hwframe+0x44/0xae

Fixes: 7be3248f3139 ("cifs: To match file servers, make sure the server hostname matches")
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-11-18 19:17:20 +01:00
..
asn1.c
cifs: decoding negTokenInit with generic ASN1 decoder
2021-06-20 21:28:17 -05:00
cache.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifs_debug.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifs_debug.h
cifs: use SPDX-Licence-Identifier
2021-06-20 21:28:17 -05:00
cifs_dfs_ref.c
cifs: Do not use the original cruid when following DFS links for multiuser mounts
2021-07-14 10:06:33 -05:00
cifs_fs_sb.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifs_ioctl.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifs_spnego_negtokeninit.asn1
cifs: decoding negTokenInit with generic ASN1 decoder
2021-06-20 21:28:17 -05:00
cifs_spnego.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifs_spnego.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifs_swn.c
cifs: remove support for NTLM and weaker authentication algorithms
2021-08-25 15:47:06 -05:00
cifs_swn.h
cifs: simplify SWN code with dummy funcs instead of ifdefs
2021-04-25 16:28:22 -05:00
cifs_unicode.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifs_unicode.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
cifs_uniupr.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
cifsacl.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifsacl.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifsencrypt.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifsfs.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifsfs.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifsglob.h
cifs: set a minimum of 120s for next dns resolution
2021-11-18 19:16:06 +01:00
cifspdu.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
cifsproto.h
cifs: Deferred close performance improvements
2021-09-17 16:39:53 -05:00
cifsroot.c
cifs: Standardize logging output
2020-06-01 00:10:18 -05:00
cifssmb.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
connect.c
cifs: set a minimum of 120s for next dns resolution
2021-11-18 19:16:06 +01:00
dfs_cache.c
cifs: support share failover when remounting
2021-07-22 11:43:23 -05:00
dfs_cache.h
cifs: support share failover when remounting
2021-07-22 11:43:23 -05:00
dir.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
dns_resolve.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
dns_resolve.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
export.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
file.c
smb3: do not error on fsync when readonly
2021-11-18 19:17:13 +01:00
fs_context.c
cifs: fix memory leak of smb3_fs_context_dup::server_hostname
2021-11-18 19:17:20 +01:00
fs_context.h
cifs: To match file servers, make sure the server hostname matches
2021-11-18 19:16:06 +01:00
fscache.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
fscache.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
inode.c
cifs: Deferred close performance improvements
2021-09-17 16:39:53 -05:00
ioctl.c
cifs: fix incorrect kernel doc comments
2021-09-13 18:29:46 -05:00
Kconfig
cifs: create a MD4 module and switch cifs.ko to use it
2021-08-25 15:48:00 -05:00
link.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
Makefile
cifs: decoding negTokenInit with generic ASN1 decoder
2021-06-20 21:28:17 -05:00
misc.c
smb3: correct server pointer dereferencing check to be more consistent
2021-09-23 21:12:23 -05:00
netlink.c
cifs: Constify static struct genl_ops
2021-06-20 21:28:16 -05:00
netlink.h
cifs: Register generic netlink family
2020-12-14 09:16:22 -06:00
netmisc.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
nterr.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
nterr.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
ntlmssp.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
readdir.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
rfc1002pdu.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
sess.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
smb1ops.c
cifs: constify path argument of ->make_node()
2021-04-25 16:28:23 -05:00
smb2file.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
smb2glob.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
smb2inode.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
smb2maperror.c
cifs: cifs_md4 convert to SPDX identifier
2021-08-25 15:51:52 -05:00
smb2misc.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
smb2ops.c
cifs: properly invalidate cached root handle when closing it
2021-09-09 17:34:38 -05:00
smb2pdu.c
smb3: correct smb3 ACL security descriptor
2021-09-23 16:17:07 -05:00
smb2pdu.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
smb2proto.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
smb2status.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
smb2transport.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
smbdirect.c
smbdirect: missing rc checks while waiting for rdma events
2021-06-22 12:08:32 -05:00
smbdirect.h
cifs: smbd: Do not schedule work to send immediate packet on every receive
2020-04-07 12:41:16 -05:00
smbencrypt.c
cifs: rename cifs_common to smbfs_common
2021-09-08 23:59:26 -05:00
smberr.h
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
trace.c
smb3: Cleanup license mess
2019-01-24 09:37:33 -06:00
trace.h
cifs: fix string declarations and assignments in tracepoints
2021-05-27 14:04:32 -05:00
transport.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
unc.c
cifs: don't cargo-cult strndup()
2021-04-25 16:28:23 -05:00
winucase.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00
xattr.c
cifs: remove pathname for file from SPDX header
2021-09-13 14:51:10 -05:00