Description

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix memory leak when build ntlmssp negotiate blob failed There is a memory leak when mount cifs: unreferenced object 0xffff888166059600 (size 448): comm "mount.cifs", pid 51391, jiffies 4295596373 (age 330.596s) hex dump (first 32 bytes): fe 53 4d 42 40 00 00 00 00 00 00 00 01 00 82 00 .SMB@........... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] mempool_alloc+0xe1/0x260 [] cifs_small_buf_get+0x24/0x60 [] __smb2_plain_req_init+0x32/0x460 [] SMB2_sess_alloc_buffer+0xa4/0x3f0 [] SMB2_sess_auth_rawntlmssp_negotiate+0xf5/0x480 [] SMB2_sess_setup+0x253/0x410 [] cifs_setup_session+0x18f/0x4c0 [] cifs_get_smb_ses+0xae7/0x13c0 [] mount_get_conns+0x7a/0x730 [] cifs_mount+0x103/0xd10 [] cifs_smb3_do_mount+0x1dd/0xc90 [] smb3_get_tree+0x1d5/0x300 [] vfs_get_tree+0x41/0xf0 [] path_mount+0x9b3/0xdd0 [] __x64_sys_mount+0x190/0x1d0 [] do_syscall_64+0x35/0x80 When build ntlmssp negotiate blob failed, the session setup request should be freed.