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| author | Dmitry Vyukov <[email protected]> | 2017-03-04 12:46:12 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2017-03-17 05:07:10 +0000 |
| commit | a4a3e061149f09c075f108b6f1cf04d9739a6bc2 (patch) | |
| tree | 1539f1e567023aeda89d8ea8af68d885d6b8f7dd /drivers/fpga/xilinx-spi.c | |
| parent | tty: don't panic on OOM in tty_set_ldisc() (diff) | |
| download | kernel-a4a3e061149f09c075f108b6f1cf04d9739a6bc2.tar.gz kernel-a4a3e061149f09c075f108b6f1cf04d9739a6bc2.zip | |
tty: fix data race in tty_ldisc_ref_wait()
tty_ldisc_ref_wait() checks tty->ldisc under tty->ldisc_sem.
But if ldisc==NULL it releases them sem and reloads
tty->ldisc without holding the sem. This is wrong and
can lead to returning non-NULL ldisc without protection.
Don't reload tty->ldisc second time.
Signed-off-by: Dmitry Vyukov <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Jiri Slaby <[email protected]>
Cc: Peter Hurley <[email protected]>
Cc: One Thousand Gnomes <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'drivers/fpga/xilinx-spi.c')
0 files changed, 0 insertions, 0 deletions