[bluez/bluez] 64916d: bass: Fix crashing on BT_BASS_MOD_SRC

[bluez/bluez] 64916d: bass: Fix crashing on BT_BASS_MOD_SRC

[Luiz Augusto von Dentz]

  Branch: refs/heads/1081219
  Home:   https://github.com/bluez/bluez
  Commit: 64916d787eb437b49954c0e87564d9e77ab3a060
      https://github.com/bluez/bluez/commit/64916d787eb437b49954c0e87564d9e77ab3a060
  Author: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
  Date:   2026-04-14 (Tue, 14 Apr 2026)

  Changed paths:
    M profiles/audio/bass.c

  Log Message:
  -----------
  bass: Fix crashing on BT_BASS_MOD_SRC

If assistant attempt o modify source the code would attempt to iterate
over all valid range of BIS indexes which may lead to the following
trace since the delegator maybe freed in the process:

 #0  queue_find (queue=<optimized out>, function=function@entry=0x58b8761109c0 <setup_match_bis>, match_data=match_data@entry=0x3) at src/shared/queue.c:230
 #1  0x000058b8761127fb in bass_update_bis_sync (bcast_src=<optimized out>, dg=<optimized out>) at profiles/audio/bass.c:1824
 #2  handle_mod_src_req (data=<optimized out>, params=<optimized out>, bcast_src=0x58b894661be0) at profiles/audio/bass.c:1862
 #3  cp_handler (bcast_src=0x58b894661be0, op=<optimized out>, params=<optimized out>, user_data=<optimized out>) at profiles/audio/bass.c:1910
 #4  0x000058b8761bc978 in bass_handle_mod_src_op (bass=<optimized out>, attrib=<optimized out>, opcode=<optimized out>, id=<optimized out>, iov=<optimized out>, att=<optimized out>)
    at src/shared/bass.c:1069

To fix the code will now just interate at existing setups checking if
they match the BIS index then adding/removing the stream so it is no
longer possible to free the delegator before all setups are processed.



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