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| author | Paulo Alcantara <pc@manguebit.com> | 2024-04-02 16:33:55 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-10 16:36:05 +0200 |
| commit | cf03020c56d3ed28c4942280957a007b5e9544f7 (patch) | |
| tree | 3ce183be7fc83821ec6f3a8ffc23801aa11377f6 | |
| parent | a65f2b56334ba4dc30bd5ee9ce5b2691b973344d (diff) | |
| download | linux-stable-cf03020c56d3ed28c4942280957a007b5e9544f7.tar.gz linux-stable-cf03020c56d3ed28c4942280957a007b5e9544f7.tar.bz2 linux-stable-cf03020c56d3ed28c4942280957a007b5e9544f7.zip | |
smb: client: fix potential UAF in cifs_stats_proc_write()
commit d3da25c5ac84430f89875ca7485a3828150a7e0a upstream.
Skip sessions that are being teared down (status == SES_EXITING) to
avoid UAF.
Cc: stable@vger.kernel.org
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/smb/client/cifs_debug.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/smb/client/cifs_debug.c b/fs/smb/client/cifs_debug.c index 82cac8169602..b4d2ee2d5e6c 100644 --- a/fs/smb/client/cifs_debug.c +++ b/fs/smb/client/cifs_debug.c @@ -656,6 +656,8 @@ static ssize_t cifs_stats_proc_write(struct file *file, } #endif /* CONFIG_CIFS_STATS2 */ list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { + if (cifs_ses_exiting(ses)) + continue; list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { atomic_set(&tcon->num_smbs_sent, 0); spin_lock(&tcon->stat_lock); |