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| author |   Tim Gardner <tim.gardner@canonical.com> | 2013-02-11 14:34:32 -0700 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2013-02-20 08:51:19 -0500 |
| commit | 0e34d0945ed16aeb72c863be4efe4cd0c62f9c53 (patch) | |
| tree | acc055d3c3fd2c4ec2972b7d5d16a729097e670f /drivers/gpu/drm/radeon/radeon_device.c | |
| parent | drm/radeon: remove overzealous warning in hdmi handling (diff) | |
| download | linux-dev-0e34d0945ed16aeb72c863be4efe4cd0c62f9c53.tar.xz linux-dev-0e34d0945ed16aeb72c863be4efe4cd0c62f9c53.zip | |
drm/radeon: Avoid NULL pointer dereference from atom_index_iio() allocation failure
Smatch anlysis:
drivers/gpu/drm/radeon/atom.c:1242 atom_index_iio() error: potential null
dereference 'ctx->iio'. (kzalloc returns null)
Also cleaned up some checks before calls to kfree(). kfree(NULL) is OK.
Cc: David Airlie <airlied@linux.ie>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Michel Dänzer" <michel.daenzer@amd.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_device.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index 6a36f4b67680..9f02fdd68f51 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -758,6 +758,11 @@ int radeon_atombios_init(struct radeon_device *rdev) atom_card_info->pll_write = cail_pll_write; rdev->mode_info.atom_context = atom_parse(atom_card_info, rdev->bios); + if (!rdev->mode_info.atom_context) { + radeon_atombios_fini(rdev); + return -ENOMEM; + } + mutex_init(&rdev->mode_info.atom_context->mutex); radeon_atom_initialize_bios_scratch_regs(rdev->ddev); atom_allocate_fb_scratch(rdev->mode_info.atom_context); @@ -777,9 +782,11 @@ void radeon_atombios_fini(struct radeon_device *rdev) { if (rdev->mode_info.atom_context) { kfree(rdev->mode_info.atom_context->scratch); - kfree(rdev->mode_info.atom_context); } + kfree(rdev->mode_info.atom_context); + rdev->mode_info.atom_context = NULL; kfree(rdev->mode_info.atom_card_info); + rdev->mode_info.atom_card_info = NULL; } /* COMBIOS */ |