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17e7b8eacf
A batch of bug fixes for the smb client:
- Fix multiple out-of-bounds reads and use-after-frees in the SMB2/3
receive path that are reachable from a malicious or compromised
server: a stale next_buffer pointer and an integer overflow in
compound encrypted frame handling, missing minimum-PDU-size and
per-sub-PDU length validation before parsing command-specific
response fields, missing bounds checks in DFS referral, server
interface list, EA list, POSIX SID, snapshot enumeration and SMB1
reparse point parsing
- Fix use-after-frees and races in multichannel and connection
teardown, including an interface freed while still in use when
adding channels, a server used after its channel reference was
dropped, a reconnect work item left queued after the server is
freed and an uninitialized reconnect list node
- Fix a heap overflow in the native symlink parser: an absolute
target without an NT drive prefix caused out-of-bounds writes and a
u16 length underflow leading to a 64K memcpy into a small buffer,
triggerable by a user with write access to a mounted share under
default settings
- Fix WSL reparse point parsing: use unaligned accessors for the
packed extended-attribute payload to avoid alignment faults on some
architectures and stop leaving partially mutated fattr fields on
parse failure
- Fix lease break ACKs being sent through the wrong session on
multiuser mounts, which caused read failures (e.g. on NetApp
ONTAP/Azure Files) when copying files
- Fix an smbd_connection leak when cifs_get_tcp_session() fails after
an RDMA connection was already established
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Merge tag 'cifs-fixes-7.3-rc4' of https://git.manguebit.org/linux
Pull smb client fixes from Paulo Alcantara:
"A batch of bug fixes for the smb client:
- Fix multiple out-of-bounds reads and use-after-frees in the SMB2/3
receive path that are reachable from a malicious or compromised
server: a stale next_buffer pointer and an integer overflow in
compound encrypted frame handling, missing minimum-PDU-size and
per-sub-PDU length validation before parsing command-specific
response fields, missing bounds checks in DFS referral, server
interface list, EA list, POSIX SID, snapshot enumeration and SMB1
reparse point parsing
- Fix use-after-frees and races in multichannel and connection
teardown, including an interface freed while still in use when
adding channels, a server used after its channel reference was
dropped, a reconnect work item left queued after the server is
freed and an uninitialized reconnect list node
- Fix a heap overflow in the native symlink parser: an absolute
target without an NT drive prefix caused out-of-bounds writes and a
u16 length underflow leading to a 64K memcpy into a small buffer,
triggerable by a user with write access to a mounted share under
default settings
- Fix WSL reparse point parsing: use unaligned accessors for the
packed extended-attribute payload to avoid alignment faults on some
architectures and stop leaving partially mutated fattr fields on
parse failure
- Fix lease break ACKs being sent through the wrong session on
multiuser mounts, which caused read failures (e.g. on NetApp
ONTAP/Azure Files) when copying files
- Fix an smbd_connection leak when cifs_get_tcp_session() fails after
an RDMA connection was already established"
* tag 'cifs-fixes-7.3-rc4' of https://git.manguebit.org/linux:
cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
smb: client: fix reparse buffer bounds in cifs_query_reparse_point()
smb: client: fix potential OOB read in smb3_enum_snapshots()
smb: client: fix missing iov bounds check in parse_posix_sids()
smb: client: fix OOB struct field reads in move_smb2_ea_to_cifs()
smb: client: reject short Next offsets in parse_server_interfaces()
smb: client: fix missing lower-bound check on DFS referral string offsets
smb: client: fix server->total_read for compound encrypted PDUs
smb: client: validate minimum PDU size before smb2_get_data_area_len()
smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs
smb: client: fix use-after-free of iface in cifs_try_adding_channels()
smb: client: fix fattr leaking on wsl_to_fattr() failure
smb: client: fix unaligned access in WSL reparse point parser
smb: client: fix smbd_connection leak on cifs_get_tcp_session() error
smb: client: fix rlist race and missing initialization
smb: client: cancel reconnect work in clean_demultiplex_info()
smb/client: send lease break ACKs thru correct session for multiuser mounts
smb: client: validate absolute native symlink targets before NT fixups
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