smb: client: fix deadlock in smb2_find_smb_tcon()
[ Upstream commit 02c418774f76a0a36a6195c9dbf8971eb4130a15 ] Unlock cifs_tcp_ses_lock before calling cifs_put_smb_ses() to avoid such deadlock. Cc: stable@vger.kernel.org Signed-off-by: Enzo Matsumiya <ematsumiya@suse.de> Reviewed-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:

committed by
Greg Kroah-Hartman

parent
78ebec450e
commit
b055752675
@@ -207,8 +207,8 @@ smb2_find_smb_tcon(struct TCP_Server_Info *server, __u64 ses_id, __u32 tid)
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}
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}
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tcon = smb2_find_smb_sess_tcon_unlocked(ses, tid);
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tcon = smb2_find_smb_sess_tcon_unlocked(ses, tid);
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if (!tcon) {
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if (!tcon) {
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cifs_put_smb_ses(ses);
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spin_unlock(&cifs_tcp_ses_lock);
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spin_unlock(&cifs_tcp_ses_lock);
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cifs_put_smb_ses(ses);
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return NULL;
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return NULL;
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}
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}
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spin_unlock(&cifs_tcp_ses_lock);
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spin_unlock(&cifs_tcp_ses_lock);
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