5.15-stable review patch. If anyone has any objections, please let me know.
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From: Denis Arefev arefev@swemel.ru
commit f23e9116ebb71b63fe9cec0dcac792aa9af30b0c upstream.
The user can set any speed value. If speed is greater than UINT_MAX/8, division by zero is possible.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: c05d1c401572 ("drm/amd/swsmu: add aldebaran smu13 ip support (v3)") Signed-off-by: Denis Arefev arefev@swemel.ru Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c @@ -1154,7 +1154,7 @@ int smu_v13_0_set_fan_speed_rpm(struct s int ret; uint32_t tach_period, crystal_clock_freq;
- if (!speed) + if (!speed || speed > UINT_MAX/8) return -EINVAL;
ret = smu_v13_0_auto_fan_control(smu, 0);