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authorPaulo Alcantara <pc@manguebit.com>2024-04-02 21:33:53 +0200
committerSteve French <stfrench@microsoft.com>2024-04-03 21:43:34 +0200
commitca545b7f0823f19db0f1148d59bc5e1a56634502 (patch)
tree084dc86ae37199f48f5652ca7bc7900ef6af62e6 /fs/smb/client/cifsglob.h
parentsmb3: retrying on failed server close (diff)
downloadlinux-ca545b7f0823f19db0f1148d59bc5e1a56634502.tar.xz
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smb: client: fix potential UAF in cifs_debug_files_proc_show()
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>
Diffstat (limited to 'fs/smb/client/cifsglob.h')
-rw-r--r--fs/smb/client/cifsglob.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h
index 77ca7861a2cc..f6a302205f89 100644
--- a/fs/smb/client/cifsglob.h
+++ b/fs/smb/client/cifsglob.h
@@ -2325,4 +2325,14 @@ struct smb2_compound_vars {
struct kvec ea_iov;
};
+static inline bool cifs_ses_exiting(struct cifs_ses *ses)
+{
+ bool ret;
+
+ spin_lock(&ses->ses_lock);
+ ret = ses->ses_status == SES_EXITING;
+ spin_unlock(&ses->ses_lock);
+ return ret;
+}
+
#endif /* _CIFS_GLOB_H */