drm/msm: dpu: Allocate proper amount for dpu_crtc_state
PATCH 1/1 drm/msm: dpu: Allocate proper amount for dpu_crtc_state
From: Sean Paul <[email protected]>
Since dpu_crtc subclasses crtc_state, we need a custom .reset hook in order to allocate the right amount of memory to accommodate the additional struct members in dpu_crtc_state. So bring it [partially] back.
Relevant KASAN splat:
[ 10.333382] ================================================================== [ 10.344288] BUG: KASAN: slab-out-of-bounds in kmemdup+0x50/0x80 [ 10.350390] Read of size 736 at addr ffffffc0d9f06080 by task frecon/394
[ 10.358861] CPU: 6 PID: 394 Comm: frecon Tainted: G W 4.19.4 #121 [ 10.366476] Hardware name: Google Cheza (rev2) (DT) [ 10.371514] Call trace: [ 10.374087] dump_backtrace+0x0/0x194 [ 10.377878] show_stack+0x20/0x28 [ 10.381330] dump_stack+0xa0/0xc8 [ 10.384783] print_address_description+0x78/0x2e0 [ 10.389639] kasan_report+0x290/0x2d0 [ 10.393428] check_memory_region+0x20/0x14c [ 10.397740] __asan_loadN+0x14/0x1c [ 10.401345] kmemdup+0x50/0x80 [ 10.404524] dpu_crtc_duplicate_state+0x58/0xa0 [ 10.409228] drm_atomic_get_crtc_state+0xac/0x178 [ 10.414095] __drm_atomic_helper_set_config+0x54/0x4a4 [ 10.419393] drm_atomic_helper_set_config+0x60/0xb4 [ 10.424435] drm_mode_setcrtc+0x720/0x760 [ 10.428570] drm_ioctl_kernel+0xd8/0x13c [ 10.432617] drm_ioctl+0x380/0x4f4 [ 10.436150] drm_compat_ioctl+0x54/0x13c [ 10.440219] __arm64_compat_sys_ioctl+0x1d8/0xef4 [ 10.445086] el0_svc_common+0xd8/0x138 [ 10.448961] el0_svc_compat_handler+0x58/0x68 [ 10.453463] el0_svc_compat+0x8/0x18
[ 10.458712] Allocated by task 56: [ 10.462148] kasan_kmalloc.part.4+0x48/0xf4 [ 10.466465] kasan_kmalloc+0x8c/0xa0 [ 10.470165] kmem_cache_alloc_trace+0x25c/0x27c [ 10.474848] drm_atomic_helper_crtc_reset+0x68/0x98 [ 10.479877] drm_mode_config_reset+0xc4/0x19c [ 10.484383] msm_drm_bind+0x814/0x8dc [ 10.488169] try_to_bring_up_master.part.7+0x48/0xac [ 10.493282] component_master_add_with_match+0x158/0x198 [ 10.498758] msm_pdev_probe+0x328/0x348 [ 10.502736] platform_drv_probe+0x74/0xc8 [ 10.506877] really_probe+0x1ac/0x35c [ 10.510659] driver_probe_device+0xd4/0x118 [ 10.514975] __device_attach_driver+0xc8/0xf4 [ 10.519477] bus_for_each_drv+0xb4/0xe4 [ 10.523439] __device_attach+0xd0/0x158 [ 10.527394] device_initial_probe+0x24/0x30 [ 10.531715] bus_probe_device+0x50/0xe4 [ 10.535681] deferred_probe_work_func+0xac/0xdc [ 10.540376] process_one_work+0x3f0/0x6d4 [ 10.544521] worker_thread+0x3f4/0x520 [ 10.548399] kthread+0x1b4/0x1c8 [ 10.551740] ret_from_fork+0x10/0x18
[ 10.556986] Freed by task 0: [ 10.559967] (stack is not available)
[ 10.565216] The buggy address belongs to the object at ffffffc0d9f06080
which belongs to the cache kmalloc-1024 of size 1024
[ 10.578268] The buggy address is located 0 bytes inside of
1024-byte region [ffffffc0d9f06080, ffffffc0d9f06480)
[ 10.590248] The buggy address belongs to the page:
[ 10.595195] page:ffffffbf0367c000 count:1 mapcount:0 mapping:ffffffc0de40f680 index:0x0 compound_mapcount: 0
[ 10.605321] flags: 0x4000000000008100(slab|head)
[ 10.610100] raw: 4000000000008100 ffffffbf0369fa08 ffffffbf0367f008 ffffffc0de40f680
[ 10.618077] raw: 0000000000000000 0000000000150015 00000001ffffffff 0000000000000000
[ 10.626049] page dumped because: kasan: bad access detected[ 10.633341] Memory state around the buggy address: [ 10.638282] ffffffc0d9f06180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 10.645710] ffffffc0d9f06200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 10.653139] >ffffffc0d9f06280: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc [ 10.660571] ^ [ 10.665774] ffffffc0d9f06300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.673210] ffffffc0d9f06380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.680639] ==================================================================
Fixes a6ba45afda41 ("drm/msm/dpu: Replace dpu_crtc_reset by atomic helper")
Cc Sean Paul <[email protected]>
Cc Bruce Wang <[email protected]>
Cc Rob Clark <[email protected]>
Signed-off-by Sean Paul <[email protected]>
--- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +13 -1
@@ -819,6 +819,18 @@ static void _dpu_crtc_vblank_enable_no_lock( } } +static void dpu_crtc_reset (struct drm_crtc *crtc) +{ +struct dpu_crtc_state *cstate; + +if (crtc->state) +dpu_crtc_destroy_state (crtc, crtc->state); + + crtc->state =kzalloc (sizeof (*cstate),GFP_KERNEL ); +if (crtc->state) + crtc->state->crtc = crtc; +} +/** * dpu_crtc_duplicate_state - state duplicate hook * @crtc: Pointer to drm crtc structure
@@ -1466,7 +1478,7 @@ static const struct drm_crtc_funcs dpu_crtc_funcs = { .set_config = drm_atomic_helper_set_config, .destroy = dpu_crtc_destroy, .page_flip = drm_atomic_helper_page_flip, - .reset = drm_atomic_helper_crtc_reset, + .reset = dpu_crtc_reset, .atomic_duplicate_state = dpu_crtc_duplicate_state, .atomic_destroy_state = dpu_crtc_destroy_state, .late_register = dpu_crtc_late_register,
Signature · 6 lines
Sean Paul, Software Engineer, Google / Chromium OS _______________________________________________ Freedreno mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/freedreno
A message that is not in the archive (sent off-list or not yet received): 20181203195604.65338-1-sean-p7yTbzM4H96eqtR555YLDQ@public.gmane.org
Bruce Wang
Reviewed-byQuoted 84 lines · Sean Paul
From: Sean Paul <[email protected]>
Since
dpu_crtcsubclassescrtc_state, we need a custom .reset hook in order to allocate the right amount of memory to accommodate the additional struct members indpu_crtc_state. So bring it [partially] back.Relevant KASAN splat:
[ 10.333382] ================================================================== [ 10.344288] BUG: KASAN: slab-out-of-bounds in kmemdup+0x50/0x80 [ 10.350390] Read of size 736 at addr ffffffc0d9f06080 by task frecon/394[ 10.358861] CPU: 6 PID: 394 Comm: frecon Tainted: G W 4.19.4 #121 [ 10.366476] Hardware name: Google Cheza (rev2) (DT) [ 10.371514] Call trace: [ 10.374087] dump_backtrace+0x0/0x194 [ 10.377878] show_stack+0x20/0x28 [ 10.381330] dump_stack+0xa0/0xc8 [ 10.384783] print_address_description+0x78/0x2e0 [ 10.389639] kasan_report+0x290/0x2d0 [ 10.393428] check_memory_region+0x20/0x14c [ 10.397740] __asan_loadN+0x14/0x1c [ 10.401345] kmemdup+0x50/0x80 [ 10.404524] dpu_crtc_duplicate_state+0x58/0xa0 [ 10.409228] drm_atomic_get_crtc_state+0xac/0x178 [ 10.414095] __drm_atomic_helper_set_config+0x54/0x4a4 [ 10.419393] drm_atomic_helper_set_config+0x60/0xb4 [ 10.424435] drm_mode_setcrtc+0x720/0x760 [ 10.428570] drm_ioctl_kernel+0xd8/0x13c [ 10.432617] drm_ioctl+0x380/0x4f4 [ 10.436150] drm_compat_ioctl+0x54/0x13c [ 10.440219] __arm64_compat_sys_ioctl+0x1d8/0xef4 [ 10.445086] el0_svc_common+0xd8/0x138 [ 10.448961] el0_svc_compat_handler+0x58/0x68 [ 10.453463] el0_svc_compat+0x8/0x18[ 10.458712] Allocated by task 56: [ 10.462148] kasan_kmalloc.part.4+0x48/0xf4 [ 10.466465] kasan_kmalloc+0x8c/0xa0 [ 10.470165] kmem_cache_alloc_trace+0x25c/0x27c [ 10.474848] drm_atomic_helper_crtc_reset+0x68/0x98 [ 10.479877] drm_mode_config_reset+0xc4/0x19c [ 10.484383] msm_drm_bind+0x814/0x8dc [ 10.488169] try_to_bring_up_master.part.7+0x48/0xac [ 10.493282] component_master_add_with_match+0x158/0x198 [ 10.498758] msm_pdev_probe+0x328/0x348 [ 10.502736] platform_drv_probe+0x74/0xc8 [ 10.506877] really_probe+0x1ac/0x35c [ 10.510659] driver_probe_device+0xd4/0x118 [ 10.514975] __device_attach_driver+0xc8/0xf4 [ 10.519477] bus_for_each_drv+0xb4/0xe4 [ 10.523439] __device_attach+0xd0/0x158 [ 10.527394] device_initial_probe+0x24/0x30 [ 10.531715] bus_probe_device+0x50/0xe4 [ 10.535681] deferred_probe_work_func+0xac/0xdc [ 10.540376] process_one_work+0x3f0/0x6d4 [ 10.544521] worker_thread+0x3f4/0x520 [ 10.548399] kthread+0x1b4/0x1c8 [ 10.551740] ret_from_fork+0x10/0x18[ 10.556986] Freed by task 0: [ 10.559967] (stack is not available)[ 10.565216] The buggy address belongs to the object at ffffffc0d9f06080 which belongs to the cache kmalloc-1024 of size 1024 [ 10.578268] The buggy address is located 0 bytes inside of 1024-byte region [ffffffc0d9f06080, ffffffc0d9f06480) [ 10.590248] The buggy address belongs to the page: [ 10.595195] page:ffffffbf0367c000 count:1 mapcount:0 mapping:ffffffc0de40f680 index:0x0 compound_mapcount: 0 [ 10.605321] flags: 0x4000000000008100(slab|head) [ 10.610100] raw: 4000000000008100 ffffffbf0369fa08 ffffffbf0367f008 ffffffc0de40f680 [ 10.618077] raw: 0000000000000000 0000000000150015 00000001ffffffff 0000000000000000 [ 10.626049] page dumped because: kasan: bad access detected[ 10.633341] Memory state around the buggy address: [ 10.638282] ffffffc0d9f06180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 10.645710] ffffffc0d9f06200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 10.653139] >ffffffc0d9f06280: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc [ 10.660571] ^ [ 10.665774] ffffffc0d9f06300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.673210] ffffffc0d9f06380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.680639] ==================================================================
Quoted 5 lines
Fixes a6ba45afda41 ("drm/msm/dpu: Replace dpu_crtc_reset by atomic helper")Cc Sean Paul <[email protected]>Cc Bruce Wang <[email protected]>Cc Rob Clark <[email protected]>Signed-off-by Sean Paul <[email protected]>
Reviewed-by Bruce Wang <[email protected]>
Quoted 37 lines
--- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +13
-2@@ -819,6 +819,18 @@ static void _dpu_crtc_vblank_enable_no_lock( } } +static void dpu_crtc_reset (struct drm_crtc *crtc) +{ +struct dpu_crtc_state *cstate; + +if (crtc->state) +dpu_crtc_destroy_state (crtc, crtc->state); + + crtc->state =kzalloc (sizeof (*cstate),GFP_KERNEL ); +if (crtc->state) + crtc->state->crtc = crtc; +} +/** * dpu_crtc_duplicate_state - state duplicate hook * @crtc: Pointer to drm crtc structure @@ -1466,7 +1478,7 @@ static const struct drm_crtc_funcs dpu_crtc_funcs = { .set_config = drm_atomic_helper_set_config, .destroy = dpu_crtc_destroy, .page_flip = drm_atomic_helper_page_flip, - .reset = drm_atomic_helper_crtc_reset, + .reset = dpu_crtc_reset, .atomic_duplicate_state = dpu_crtc_duplicate_state, .atomic_destroy_state = dpu_crtc_destroy_state, .late_register = dpu_crtc_late_register, --
Quoted 2 lines
Sean Paul, Software Engineer, Google / Chromium OS
_______________________________________________
Freedreno mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/freedreno
A message that is not in the archive (sent off-list or not yet received): CAA3FfWVLViMqN74=UxM1otSqaYnixnixmnoNmHJj9H+MiFDrQA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org
Quoted 85 lines · Bruce Wang
Quoted 84 lines · Sean Paul
From: Sean Paul <[email protected]>
Since
dpu_crtcsubclassescrtc_state, we need a custom .reset hook in order to allocate the right amount of memory to accommodate the additional struct members indpu_crtc_state. So bring it [partially] back.Relevant KASAN splat:
[ 10.333382] ================================================================== [ 10.344288] BUG: KASAN: slab-out-of-bounds in kmemdup+0x50/0x80 [ 10.350390] Read of size 736 at addr ffffffc0d9f06080 by task frecon/394[ 10.358861] CPU: 6 PID: 394 Comm: frecon Tainted: G W 4.19.4 #121 [ 10.366476] Hardware name: Google Cheza (rev2) (DT) [ 10.371514] Call trace: [ 10.374087] dump_backtrace+0x0/0x194 [ 10.377878] show_stack+0x20/0x28 [ 10.381330] dump_stack+0xa0/0xc8 [ 10.384783] print_address_description+0x78/0x2e0 [ 10.389639] kasan_report+0x290/0x2d0 [ 10.393428] check_memory_region+0x20/0x14c [ 10.397740] __asan_loadN+0x14/0x1c [ 10.401345] kmemdup+0x50/0x80 [ 10.404524] dpu_crtc_duplicate_state+0x58/0xa0 [ 10.409228] drm_atomic_get_crtc_state+0xac/0x178 [ 10.414095] __drm_atomic_helper_set_config+0x54/0x4a4 [ 10.419393] drm_atomic_helper_set_config+0x60/0xb4 [ 10.424435] drm_mode_setcrtc+0x720/0x760 [ 10.428570] drm_ioctl_kernel+0xd8/0x13c [ 10.432617] drm_ioctl+0x380/0x4f4 [ 10.436150] drm_compat_ioctl+0x54/0x13c [ 10.440219] __arm64_compat_sys_ioctl+0x1d8/0xef4 [ 10.445086] el0_svc_common+0xd8/0x138 [ 10.448961] el0_svc_compat_handler+0x58/0x68 [ 10.453463] el0_svc_compat+0x8/0x18[ 10.458712] Allocated by task 56: [ 10.462148] kasan_kmalloc.part.4+0x48/0xf4 [ 10.466465] kasan_kmalloc+0x8c/0xa0 [ 10.470165] kmem_cache_alloc_trace+0x25c/0x27c [ 10.474848] drm_atomic_helper_crtc_reset+0x68/0x98 [ 10.479877] drm_mode_config_reset+0xc4/0x19c [ 10.484383] msm_drm_bind+0x814/0x8dc [ 10.488169] try_to_bring_up_master.part.7+0x48/0xac [ 10.493282] component_master_add_with_match+0x158/0x198 [ 10.498758] msm_pdev_probe+0x328/0x348 [ 10.502736] platform_drv_probe+0x74/0xc8 [ 10.506877] really_probe+0x1ac/0x35c [ 10.510659] driver_probe_device+0xd4/0x118 [ 10.514975] __device_attach_driver+0xc8/0xf4 [ 10.519477] bus_for_each_drv+0xb4/0xe4 [ 10.523439] __device_attach+0xd0/0x158 [ 10.527394] device_initial_probe+0x24/0x30 [ 10.531715] bus_probe_device+0x50/0xe4 [ 10.535681] deferred_probe_work_func+0xac/0xdc [ 10.540376] process_one_work+0x3f0/0x6d4 [ 10.544521] worker_thread+0x3f4/0x520 [ 10.548399] kthread+0x1b4/0x1c8 [ 10.551740] ret_from_fork+0x10/0x18[ 10.556986] Freed by task 0: [ 10.559967] (stack is not available)[ 10.565216] The buggy address belongs to the object at ffffffc0d9f06080 which belongs to the cache kmalloc-1024 of size 1024 [ 10.578268] The buggy address is located 0 bytes inside of 1024-byte region [ffffffc0d9f06080, ffffffc0d9f06480) [ 10.590248] The buggy address belongs to the page: [ 10.595195] page:ffffffbf0367c000 count:1 mapcount:0 mapping:ffffffc0de40f680 index:0x0 compound_mapcount: 0 [ 10.605321] flags: 0x4000000000008100(slab|head) [ 10.610100] raw: 4000000000008100 ffffffbf0369fa08 ffffffbf0367f008 ffffffc0de40f680 [ 10.618077] raw: 0000000000000000 0000000000150015 00000001ffffffff 0000000000000000 [ 10.626049] page dumped because: kasan: bad access detected[ 10.633341] Memory state around the buggy address: [ 10.638282] ffffffc0d9f06180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 10.645710] ffffffc0d9f06200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 10.653139] >ffffffc0d9f06280: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc [ 10.660571] ^ [ 10.665774] ffffffc0d9f06300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.673210] ffffffc0d9f06380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.680639] ==================================================================
Quoted 7 lines
Quoted 5 lines
Fixes a6ba45afda41 ("drm/msm/dpu: Replace dpu_crtc_reset by atomic helper")Cc Sean Paul <[email protected]>Cc Bruce Wang <[email protected]>Cc Rob Clark <[email protected]>Signed-off-by Sean Paul <[email protected]>Reviewed-by Bruce Wang <[email protected]>
Thanks for the review, this has been pushed to dpu-staging/for-next
Sean
Quoted 40 lines
Quoted 40 lines
--- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +13
-2@@ -819,6 +819,18 @@ static void _dpu_crtc_vblank_enable_no_lock( } } +static void dpu_crtc_reset (struct drm_crtc *crtc) +{ +struct dpu_crtc_state *cstate; + +if (crtc->state) +dpu_crtc_destroy_state (crtc, crtc->state); + + crtc->state =kzalloc (sizeof (*cstate),GFP_KERNEL ); +if (crtc->state) + crtc->state->crtc = crtc; +} +/** * dpu_crtc_duplicate_state - state duplicate hook * @crtc: Pointer to drm crtc structure @@ -1466,7 +1478,7 @@ static const struct drm_crtc_funcs dpu_crtc_funcs = { .set_config = drm_atomic_helper_set_config, .destroy = dpu_crtc_destroy, .page_flip = drm_atomic_helper_page_flip, - .reset = drm_atomic_helper_crtc_reset, + .reset = dpu_crtc_reset, .atomic_duplicate_state = dpu_crtc_duplicate_state, .atomic_destroy_state = dpu_crtc_destroy_state, .late_register = dpu_crtc_late_register, --Sean Paul, Software Engineer, Google / Chromium OS
Signature · 5 lines
Sean Paul, Software Engineer, Google / Chromium OS _______________________________________________ Freedreno mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/freedreno