5.15-stable review patch. If anyone has any objections, please let me know.
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From: Enzo Matsumiya ematsumiya@suse.de
[ 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 --- fs/cifs/smb2transport.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c index 0f2e0ce84a03f..ffae3a7f46ce4 100644 --- a/fs/cifs/smb2transport.c +++ b/fs/cifs/smb2transport.c @@ -194,8 +194,8 @@ smb2_find_smb_tcon(struct TCP_Server_Info *server, __u64 ses_id, __u32 tid) } tcon = smb2_find_smb_sess_tcon_unlocked(ses, tid); if (!tcon) { - cifs_put_smb_ses(ses); spin_unlock(&cifs_tcp_ses_lock); + cifs_put_smb_ses(ses); return NULL; } spin_unlock(&cifs_tcp_ses_lock);