| TITLE: possible deadlock in tty_buffer_flush |
| CORRUPTED: Y |
| |
| [ 1722.511384] ====================================================== |
| [ 1722.511384] WARNING: possible circular locking dependency detected |
| [ 1722.511384] 4.12.0-rc2-next-20170529+ #1 Not tainted |
| [ 1722.511384] ------------------------------------------------------ |
| [ 1722.511384] kworker/u4:2/58 is trying to acquire lock: |
| [ 1722.511384] (&buf->lock){+.+...}, at: [<ffffffffa41b4e5b>] tty_buffer_flush+0xbb/0x3a0 drivers/tty/tty_buffer.c:221 |
| [ 1722.511384] |
| [ 1722.511384] but task is already holding lock: |
| [ 1722.511384] (&o_tty->termios_rwsem/1){++++..}, at: [<ffffffffa41a5601>] isig+0xa1/0x4d0 drivers/tty/n_tty.c:1100 |
| [ 1722.511384] |
| [ 1722.511384] which lock already depends on the new lock. |
