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| author | Randy Dunlap <rdunlap@infradead.org> | 2019-09-16 16:12:23 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-04 15:02:46 +0200 |
| commit | a553add0846f355a28ed4e81134012e4a1e280c2 (patch) | |
| tree | e43a77232310ce392d7e1291062772f1dc7e3326 /drivers/hv/hv_trace.c | |
| parent | 9050079719021776e48437827eb9d5986b6e45d4 (diff) | |
| download | linux-a553add0846f355a28ed4e81134012e4a1e280c2.tar.bz2 | |
serial: uartlite: fix exit path null pointer
Call uart_unregister_driver() conditionally instead of
unconditionally, only if it has been previously registered.
This uses driver.state, just as the sh-sci.c driver does.
Fixes this null pointer dereference in tty_unregister_driver(),
since the 'driver' argument is null:
general protection fault: 0000 [#1] PREEMPT SMP KASAN PTI
RIP: 0010:tty_unregister_driver+0x25/0x1d0
Fixes: 238b8721a554 ("[PATCH] serial uartlite driver")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: stable <stable@vger.kernel.org>
Cc: Peter Korsgaard <jacmet@sunsite.dk>
Link: https://lore.kernel.org/r/9c8e6581-6fcc-a595-0897-4d90f5d710df@infradead.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/hv_trace.c')
0 files changed, 0 insertions, 0 deletions