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linux-stable/fs/ksmbd
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Namjae Jeon a54c509c32 ksmbd: fix use-after-free bug in smb2_tree_disconect 
commit cf6531d981 upstream.

smb2_tree_disconnect() freed the struct ksmbd_tree_connect,
but it left the dangling pointer. It can be accessed
again under compound requests.

This bug can lead an oops looking something link:

[ 1685.468014 ] BUG: KASAN: use-after-free in ksmbd_tree_conn_disconnect+0x131/0x160 [ksmbd]
[ 1685.468068 ] Read of size 4 at addr ffff888102172180 by task kworker/1:2/4807
...
[ 1685.468130 ] Call Trace:
[ 1685.468132 ]  <TASK>
[ 1685.468135 ]  dump_stack_lvl+0x49/0x5f
[ 1685.468141 ]  print_report.cold+0x5e/0x5cf
[ 1685.468145 ]  ? ksmbd_tree_conn_disconnect+0x131/0x160 [ksmbd]
[ 1685.468157 ]  kasan_report+0xaa/0x120
[ 1685.468194 ]  ? ksmbd_tree_conn_disconnect+0x131/0x160 [ksmbd]
[ 1685.468206 ]  __asan_report_load4_noabort+0x14/0x20
[ 1685.468210 ]  ksmbd_tree_conn_disconnect+0x131/0x160 [ksmbd]
[ 1685.468222 ]  smb2_tree_disconnect+0x175/0x250 [ksmbd]
[ 1685.468235 ]  handle_ksmbd_work+0x30e/0x1020 [ksmbd]
[ 1685.468247 ]  process_one_work+0x778/0x11c0
[ 1685.468251 ]  ? _raw_spin_lock_irq+0x8e/0xe0
[ 1685.468289 ]  worker_thread+0x544/0x1180
[ 1685.468293 ]  ? __cpuidle_text_end+0x4/0x4
[ 1685.468297 ]  kthread+0x282/0x320
[ 1685.468301 ]  ? process_one_work+0x11c0/0x11c0
[ 1685.468305 ]  ? kthread_complete_and_exit+0x30/0x30
[ 1685.468309 ]  ret_from_fork+0x1f/0x30

Fixes: e2f34481b2 ("cifsd: add server-side procedures for SMB3")
Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-17816
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-08-17 14:22:56 +02:00
..
mgmt ksmbd: throttle session setup failures to avoid dictionary attacks 2021-10-20 00:07:10 -05:00
asn1.c
asn1.h
auth.c ksmbd: add buffer validation in session setup 2021-10-20 00:07:10 -05:00
auth.h
connection.c ksmbd: fix outstanding credits related bugs 2022-06-09 10:23:27 +02:00
connection.h ksmbd: limits exceeding the maximum allowable outstanding requests 2022-01-27 11:02:53 +01:00
crypto_ctx.c ksmbd: remove NTLMv1 authentication 2021-09-29 16:17:34 -05:00
crypto_ctx.h ksmbd: remove NTLMv1 authentication 2021-09-29 16:17:34 -05:00
glob.h ksmbd: fix version mismatch with out of tree 2021-10-07 10:18:34 -05:00
Kconfig ksmbd: set unique value to volume serial field in FS_VOLUME_INFORMATION 2021-11-18 19:16:07 +01:00
ksmbd_netlink.h ksmbd: add reserved room in ipc request/response 2022-01-27 11:02:53 +01:00
ksmbd_spnego_negtokeninit.asn1
ksmbd_spnego_negtokentarg.asn1
ksmbd_work.c ksmbd: reorder and document on-disk and netlink structures in headers 2021-06-30 14:47:24 +09:00
ksmbd_work.h ksmbd: change data type of volatile/persistent id to u64 2021-07-09 08:23:16 +09:00
Makefile
misc.c ksmbd: missing check for NULL in convert_to_nt_pathname() 2021-09-30 20:00:05 -05:00
misc.h ksmbd: use LOOKUP_BENEATH to prevent the out of share access 2021-09-24 21:25:23 -05:00
ndr.c ksmbd: fix error code in ndr_read_int32() 2021-12-29 12:28:57 +01:00
ndr.h ksmbd: add user namespace support 2021-07-02 16:27:10 +09:00
nterr.h
ntlmssp.h
oplock.c ksmbd: add buffer validation for SMB2_CREATE_CONTEXT 2021-09-30 09:58:07 -05:00
oplock.h ksmbd: remove SMB1 oplock level macros 2021-06-30 14:43:51 +09:00
server.c ksmbd: set unique value to volume serial field in FS_VOLUME_INFORMATION 2021-11-18 19:16:07 +01:00
server.h ksmbd: change server config string index to enumeration 2021-06-30 14:44:01 +09:00
smb2misc.c ksmbd: prevent out of bound read for SMB2_TREE_CONNNECT 2022-08-17 14:22:56 +02:00
smb2ops.c ksmbd: add support for smb2 max credit parameter 2022-01-27 11:02:53 +01:00
smb2pdu.c ksmbd: fix use-after-free bug in smb2_tree_disconect 2022-08-17 14:22:56 +02:00
smb2pdu.h ksmbd: add support for smb2 max credit parameter 2022-01-27 11:02:53 +01:00
smb_common.c ksmbd: fix outstanding credits related bugs 2022-06-09 10:23:27 +02:00
smb_common.h ksmbd: add support for smb2 max credit parameter 2022-01-27 11:02:53 +01:00
smbacl.c fs: use low-level mapping helpers 2022-07-02 16:41:16 +02:00
smbacl.h fs: use low-level mapping helpers 2022-07-02 16:41:16 +02:00
smbfsctl.h
smbstatus.h
transport_ipc.c ksmbd: add support for smb2 max credit parameter 2022-01-27 11:02:53 +01:00
transport_ipc.h ksmbd: throttle session setup failures to avoid dictionary attacks 2021-10-20 00:07:10 -05:00
transport_rdma.c ksmbd: add buffer validation for smb direct 2021-10-15 09:18:29 -05:00
transport_rdma.h ksmbd: fix typo of MS-SMBD 2021-07-22 09:55:58 +09:00
transport_tcp.c ksmbd: use SOCK_NONBLOCK type for kernel_accept() 2022-07-21 21:24:32 +02:00
transport_tcp.h
unicode.c
unicode.h
uniupr.h
vfs.c vfs: fix copy_file_range() regression in cross-fs copies 2022-07-07 17:53:27 +02:00
vfs.h ksmbd: don't align last entry offset in smb2 query directory 2022-02-23 12:03:18 +01:00
vfs_cache.c ksmbd: increment reference count of parent fp 2022-05-09 09:14:40 +02:00
vfs_cache.h ksmbd: remove unused ksmbd_file_table_flush function 2021-09-03 23:29:45 -05:00
xattr.h ksmbd: reorder and document on-disk and netlink structures in headers 2021-06-30 14:47:24 +09:00