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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-27 14:49:35 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-27 14:49:35 -0800 |
commit | 3498e7f2bb415e447354a3debef6738d9655768c (patch) | |
tree | 8eec2dc8d5ff1cf709c63a192d0d7a3deb37df58 | |
parent | 00169a9245f841ec666c70959bfd1dcacce74324 (diff) | |
parent | 178ca6f85aa3231094467691f5ea1ff2f398aa8d (diff) | |
download | lwn-3498e7f2bb415e447354a3debef6738d9655768c.tar.gz lwn-3498e7f2bb415e447354a3debef6738d9655768c.zip |
Merge tag '5.16-rc2-ksmbd-fixes' of git://git.samba.org/ksmbd
Pull ksmbd fixes from Steve French:
"Five ksmbd server fixes, four of them for stable:
- memleak fix
- fix for default data stream on filesystems that don't support xattr
- error logging fix
- session setup fix
- minor doc cleanup"
* tag '5.16-rc2-ksmbd-fixes' of git://git.samba.org/ksmbd:
ksmbd: fix memleak in get_file_stream_info()
ksmbd: contain default data stream even if xattr is empty
ksmbd: downgrade addition info error msg to debug in smb2_get_info_sec()
docs: filesystem: cifs: ksmbd: Fix small layout issues
ksmbd: Fix an error handling path in 'smb2_sess_setup()'
-rw-r--r-- | Documentation/filesystems/cifs/ksmbd.rst | 10 | ||||
-rw-r--r-- | fs/ksmbd/smb2pdu.c | 30 |
2 files changed, 22 insertions, 18 deletions
diff --git a/Documentation/filesystems/cifs/ksmbd.rst b/Documentation/filesystems/cifs/ksmbd.rst index a1326157d53f..b0d354fd8066 100644 --- a/Documentation/filesystems/cifs/ksmbd.rst +++ b/Documentation/filesystems/cifs/ksmbd.rst @@ -50,11 +50,11 @@ ksmbd.mountd (user space daemon) -------------------------------- ksmbd.mountd is userspace process to, transfer user account and password that -are registered using ksmbd.adduser(part of utils for user space). Further it +are registered using ksmbd.adduser (part of utils for user space). Further it allows sharing information parameters that parsed from smb.conf to ksmbd in kernel. For the execution part it has a daemon which is continuously running and connected to the kernel interface using netlink socket, it waits for the -requests(dcerpc and share/user info). It handles RPC calls (at a minimum few +requests (dcerpc and share/user info). It handles RPC calls (at a minimum few dozen) that are most important for file server from NetShareEnum and NetServerGetInfo. Complete DCE/RPC response is prepared from the user space and passed over to the associated kernel thread for the client. @@ -154,11 +154,11 @@ Each layer 1. Enable all component prints # sudo ksmbd.control -d "all" -2. Enable one of components(smb, auth, vfs, oplock, ipc, conn, rdma) +2. Enable one of components (smb, auth, vfs, oplock, ipc, conn, rdma) # sudo ksmbd.control -d "smb" -3. Show what prints are enable. - # cat/sys/class/ksmbd-control/debug +3. Show what prints are enabled. + # cat /sys/class/ksmbd-control/debug [smb] auth vfs oplock ipc conn [rdma] 4. Disable prints: diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 121f8e8c70ac..49c9da37315c 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -1697,8 +1697,10 @@ int smb2_sess_setup(struct ksmbd_work *work) negblob_off = le16_to_cpu(req->SecurityBufferOffset); negblob_len = le16_to_cpu(req->SecurityBufferLength); if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) || - negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) - return -EINVAL; + negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { + rc = -EINVAL; + goto out_err; + } negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + negblob_off); @@ -4457,6 +4459,12 @@ static void get_file_stream_info(struct ksmbd_work *work, &stat); file_info = (struct smb2_file_stream_info *)rsp->Buffer; + buf_free_len = + smb2_calc_max_out_buf_len(work, 8, + le32_to_cpu(req->OutputBufferLength)); + if (buf_free_len < 0) + goto out; + xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); if (xattr_list_len < 0) { goto out; @@ -4465,12 +4473,6 @@ static void get_file_stream_info(struct ksmbd_work *work, goto out; } - buf_free_len = - smb2_calc_max_out_buf_len(work, 8, - le32_to_cpu(req->OutputBufferLength)); - if (buf_free_len < 0) - goto out; - while (idx < xattr_list_len) { stream_name = xattr_list + idx; streamlen = strlen(stream_name); @@ -4496,8 +4498,10 @@ static void get_file_stream_info(struct ksmbd_work *work, ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); next = sizeof(struct smb2_file_stream_info) + streamlen * 2; - if (next > buf_free_len) + if (next > buf_free_len) { + kfree(stream_buf); break; + } file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, @@ -4514,6 +4518,7 @@ static void get_file_stream_info(struct ksmbd_work *work, file_info->NextEntryOffset = cpu_to_le32(next); } +out: if (!S_ISDIR(stat.mode) && buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { file_info = (struct smb2_file_stream_info *) @@ -4522,14 +4527,13 @@ static void get_file_stream_info(struct ksmbd_work *work, "::$DATA", 7, conn->local_nls, 0); streamlen *= 2; file_info->StreamNameLength = cpu_to_le32(streamlen); - file_info->StreamSize = 0; - file_info->StreamAllocationSize = 0; + file_info->StreamSize = cpu_to_le64(stat.size); + file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); nbytes += sizeof(struct smb2_file_stream_info) + streamlen; } /* last entry offset should be 0 */ file_info->NextEntryOffset = 0; -out: kvfree(xattr_list); rsp->OutputBufferLength = cpu_to_le32(nbytes); @@ -5068,7 +5072,7 @@ static int smb2_get_info_sec(struct ksmbd_work *work, if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | PROTECTED_DACL_SECINFO | UNPROTECTED_DACL_SECINFO)) { - pr_err("Unsupported addition info: 0x%x)\n", + ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", addition_info); pntsd->revision = cpu_to_le16(1); |