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smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()

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Commit 96c4af4185 ("cifs: Fix locking usage for tcon fields")
refactored cifs code to change cifs_tcp_ses_lock for tc_lock around
tc_count changes.

There was missing lock around tc_count increment inside
smb2_find_smb_sess_tcon_unlocked().

Cc: stable@vger.kernel.org
Fixes: 96c4af4185 ("cifs: Fix locking usage for tcon fields")
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Henrique Carvalho <henrique.carvalho@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Henrique Carvalho 2026-05-14 20:18:25 -03:00 committed by Steve French
parent 5200f5f493
commit 4d8690dace
1 changed files with 2 additions and 0 deletions
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2
fs/smb/client/smb2transport.c
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@ -169,7 +169,9 @@ smb2_find_smb_sess_tcon_unlocked(struct cifs_ses *ses, __u32 tid)
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
if (tcon->tid != tid)
continue;
spin_lock(&tcon->tc_lock);
++tcon->tc_count;
spin_unlock(&tcon->tc_lock);
trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count,
netfs_trace_tcon_ref_get_find_sess_tcon);
return tcon;