diff options
| author | Paulo Alcantara <[email protected]> | 2023-10-25 14:58:35 -0300 |
|---|---|---|
| committer | Steve French <[email protected]> | 2023-10-31 12:38:02 -0500 |
| commit | e6322fd177c6885a21dd4609dc5e5c973d1a2eb7 (patch) | |
| tree | ef37d8ba5db90d1c2eda090137ac422df0ad8d87 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 72bc63f5e23a38b65ff2a201bdc11401d4223fa9 (diff) | |
smb: client: fix potential deadlock when releasing mids
All release_mid() callers seem to hold a reference of @mid so there is
no need to call kref_put(&mid->refcount, __release_mid) under
@server->mid_lock spinlock. If they don't, then an use-after-free bug
would have occurred anyways.
By getting rid of such spinlock also fixes a potential deadlock as
shown below
CPU 0 CPU 1
------------------------------------------------------------------
cifs_demultiplex_thread() cifs_debug_data_proc_show()
release_mid()
spin_lock(&server->mid_lock);
spin_lock(&cifs_tcp_ses_lock)
spin_lock(&server->mid_lock)
__release_mid()
smb2_find_smb_tcon()
spin_lock(&cifs_tcp_ses_lock) *deadlock*
Cc: [email protected]
Signed-off-by: Paulo Alcantara (SUSE) <[email protected]>
Signed-off-by: Steve French <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions