diff options
| author | Keita Suzuki <[email protected]> | 2022-04-26 06:29:19 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <[email protected]> | 2022-11-25 10:02:57 +0000 |
| commit | 6b0d0477fce747d4137aa65856318b55fba72198 (patch) | |
| tree | 3b82dc04bbcf7071dd7b62ef8f5a1f9c571a091b /net/lapb/lapb_timer.c | |
| parent | af0dc3b0afae85941338aae9d6d3c1f0904d9979 (diff) | |
media: dvb-core: Fix double free in dvb_register_device()
In function dvb_register_device() -> dvb_register_media_device() ->
dvb_create_media_entity(), dvb->entity is allocated and initialized. If
the initialization fails, it frees the dvb->entity, and return an error
code. The caller takes the error code and handles the error by calling
dvb_media_device_free(), which unregisters the entity and frees the
field again if it is not NULL. As dvb->entity may not NULLed in
dvb_create_media_entity() when the allocation of dvbdev->pad fails, a
double free may occur. This may also cause an Use After free in
media_device_unregister_entity().
Fix this by storing NULL to dvb->entity when it is freed.
Link: https://lore.kernel.org/linux-media/[email protected]
Fixes: fcd5ce4b3936 ("media: dvb-core: fix a memory leak bug")
Cc: [email protected]
Cc: Wenwen Wang <[email protected]>
Signed-off-by: Keita Suzuki <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions