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| author | Randy Dunlap <rdunlap@infradead.org> | 2019-09-16 16:12:23 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2019-12-19 15:58:11 +0000 |
| commit | ed5da1455def82331805e192c03e4eb909276257 (patch) | |
| tree | c49306e2fadcf836ceb657b93dff47f4a59c44ab /net/sched/sch_teql.c | |
| parent | 6e6d80f302ad1fcc3ef3b290d9796cbad2bd1a5e (diff) | |
| download | linux-stable-ed5da1455def82331805e192c03e4eb909276257.tar.gz linux-stable-ed5da1455def82331805e192c03e4eb909276257.tar.bz2 linux-stable-ed5da1455def82331805e192c03e4eb909276257.zip | |
serial: uartlite: fix exit path null pointer
commit a553add0846f355a28ed4e81134012e4a1e280c2 upstream.
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: 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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net/sched/sch_teql.c')
0 files changed, 0 insertions, 0 deletions