/* * Generator for GIMPLE pass related boilerplate code/data * * Supports gcc 4.5-6 * * Usage: * * 1. before inclusion define PASS_NAME * 2. before inclusion define NO_* for unimplemented callbacks * NO_GATE * NO_EXECUTE * 3. before inclusion define PROPERTIES_* and TODO_FLAGS_* to override * the default 0 values * 4. for convenience, all the above will be undefined after inclusion! * 5. the only exported name is make_PASS_NAME_pass() to register with gcc */ #ifndef PASS_NAME #error at least PASS_NAME must be defined #else #define __GCC_PLUGIN_STRINGIFY(n) #n #define _GCC_PLUGIN_STRINGIFY(n) __GCC_PLUGIN_STRINGIFY(n) #define _GCC_PLUGIN_CONCAT2(x, y) x ## y #define _GCC_PLUGIN_CONCAT3(x, y, z) x ## y ## z #define __PASS_NAME_PASS_DATA(n) _GCC_PLUGIN_CONCAT2(n, _pass_data) #define _PASS_NAME_PASS_DATA __PASS_NAME_PASS_DATA(PASS_NAME) #define __PASS_NAME_PASS(n) _GCC_PLUGIN_CONCAT2(n, _pass) #define _PASS_NAME_PASS __PASS_NAME_PASS(PASS_NAME) #define _PASS_NAME_NAME _GCC_PLUGIN_STRINGIFY(PASS_NAME) #define __MAKE_PASS_NAME_PASS(n) _GCC_PLUGIN_CONCAT3(make_, n, _pass) #define _MAKE_PASS_NAME_PASS __MAKE_PASS_NAME_PASS(PASS_NAME) #ifdef NO_GATE #define _GATE NULL #define _HAS_GATE false #else #define __GATE(n) _GCC_PLUGIN_CONCAT2(n, _gate) #define _GATE __GATE(PASS_NAME) #define _HAS_GATE true #endif #ifdef NO_EXECUTE #define _EXECUTE NULL #define _HAS_EXECUTE false #else #define __EXECUTE(n) _GCC_PLUGIN_CONCAT2(n, _execute) #define _EXECUTE __EXECUTE(PASS_NAME) #define _HAS_EXECUTE true #endif #ifndef PROPERTIES_REQUIRED #define PROPERTIES_REQUIRED 0 #endif #ifndef PROPERTIES_PROVIDED #define PROPERTIES_PROVIDED 0 #endif #ifndef PROPERTIES_DESTROYED #define PROPERTIES_DESTROYED 0 #endif #ifndef TODO_FLAGS_START #define TODO_FLAGS_START 0 #endif #ifndef TODO_FLAGS_FINISH #define TODO_FLAGS_FINISH 0 #endif #if BUILDING_GCC_VERSION >= 4009 namespace { static const pass_data _PASS_NAME_PASS_DATA = { #else static struct gimple_opt_pass _PASS_NAME_PASS = { .pass = { #endif .type = GIMPLE_PASS, .name = _PASS_NAME_NAME, #if BUILDING_GCC_VERSION >= 4008 .optinfo_flags = OPTGROUP_NONE, #endif #if BUILDING_GCC_VERSION >= 5000 #elif BUILDING_GCC_VERSION == 4009 .has_gate = _HAS_GATE, .has_execute = _HAS_EXECUTE, #else .gate = _GATE, .execute = _EXECUTE, .sub = NULL, .next = NULL, .static_pass_number = 0, #endif .tv_id = TV_NONE, .properties_required = PROPERTIES_REQUIRED, .properties_provided = PROPERTIES_PROVIDED, .properties_destroyed = PROPERTIES_DESTROYED, .todo_flags_start = TODO_FLAGS_START, .todo_flags_finish = TODO_FLAGS_FINISH, #if BUILDING_GCC_VERSION < 4009 } #endif }; #if BUILDING_GCC_VERSION >= 4009 class _PASS_NAME_PASS : public gimple_opt_pass { public: _PASS_NAME_PASS() : gimple_opt_pass(_PASS_NAME_PASS_DATA, g) {} #ifndef NO_GATE #if BUILDING_GCC_VERSION >= 5000 virtual bool gate(function *) { return _GATE(); } #else virtual bool gate(void) { return _GATE(); } #endif #endif virtual opt_pass * clone () { return new _PASS_NAME_PASS(); } #ifndef NO_EXECUTE #if BUILDING_GCC_VERSION >= 5000 virtual unsigned int execute(function *) { return _EXECUTE(); } #else virtual unsigned int execute(void) { return _EXECUTE(); } #endif #endif }; } opt_pass *_MAKE_PASS_NAME_PASS(void) { return new _PASS_NAME_PASS(); } #else struct opt_pass *_MAKE_PASS_NAME_PASS(void) { return &_PASS_NAME_PASS.pass; } #endif /* clean up user provided defines */ #undef PASS_NAME #undef NO_GATE #undef NO_EXECUTE #undef PROPERTIES_DESTROYED #undef PROPERTIES_PROVIDED #undef PROPERTIES_REQUIRED #undef TODO_FLAGS_FINISH #undef TODO_FLAGS_START /* clean up generated defines */ #undef _EXECUTE #undef __EXECUTE #undef _GATE #undef __GATE #undef _GCC_PLUGIN_CONCAT2 #undef _GCC_PLUGIN_CONCAT3 #undef _GCC_PLUGIN_STRINGIFY #undef __GCC_PLUGIN_STRINGIFY #undef _HAS_EXECUTE #undef _HAS_GATE #undef _MAKE_PASS_NAME_PASS #undef __MAKE_PASS_NAME_PASS #undef _PASS_NAME_NAME #undef _PASS_NAME_PASS #undef __PASS_NAME_PASS #undef _PASS_NAME_PASS_DATA #undef __PASS_NAME_PASS_DATA #endif /* PASS_NAME */ elect name='dt' onchange='this.form.submit();'>
authorMaarten Lankhorst <maarten.lankhorst@linux.intel.com>2017-01-31 10:25:25 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-31 13:41:46 +0100
commit92c715fca907686f5298220ece53423e38ba3aed (patch)
tree286158fdad04c9b54955350abb95d4f1c0dc860a /net/core/netevent.c
parente6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0 (diff)
drm/atomic: Fix double free in drm_atomic_state_default_clear
drm_atomic_helper_page_flip and drm_atomic_ioctl set their own events in crtc_state->event. But when it's set the event is freed in 2 places. Solve this by only freeing the event in the atomic ioctl when it allocated its own event. This has been broken twice. The first time when the code was introduced, but only in the corner case when an event is allocated, but more crtc's were included by atomic check and then failing. This can mostly happen when you do an atomic modeset in i915 and the display clock is changed, which forces all crtc's to be included to the state. This has been broken worse by adding in-fences support, which caused the double free to be done unconditionally. [IGT] kms_rotation_crc: starting subtest primary-rotation-180 ============================================================================= BUG kmalloc-128 (Tainted: G U ): Object already free ----------------------------------------------------------------------------- Disabling lock debugging due to kernel taint INFO: Allocated in drm_atomic_helper_setup_commit+0x285/0x2f0 [drm_kms_helper] age=0 cpu=3 pid=1529 ___slab_alloc+0x308/0x3b0 __slab_alloc+0xd/0x20 kmem_cache_alloc_trace+0x92/0x1c0 drm_atomic_helper_setup_commit+0x285/0x2f0 [drm_kms_helper] intel_atomic_commit+0x35/0x4f0 [i915] drm_atomic_commit+0x46/0x50 [drm] drm_mode_atomic_ioctl+0x7d4/0xab0 [drm] drm_ioctl+0x2b3/0x490 [drm] do_vfs_ioctl+0x69c/0x700 SyS_ioctl+0x4e/0x80 entry_SYSCALL_64_fastpath+0x13/0x94 INFO: Freed in drm_event_cancel_free+0xa3/0xb0 [drm] age=0 cpu=3 pid=1529 __slab_free+0x48/0x2e0 kfree+0x159/0x1a0 drm_event_cancel_free+0xa3/0xb0 [drm] drm_mode_atomic_ioctl+0x86d/0xab0 [drm] drm_ioctl+0x2b3/0x490 [drm] do_vfs_ioctl+0x69c/0x700 SyS_ioctl+0x4e/0x80 entry_SYSCALL_64_fastpath+0x13/0x94 INFO: Slab 0xffffde1f0997b080 objects=17 used=2 fp=0xffff92fb65ec2578 flags=0x200000000008101 INFO: Object 0xffff92fb65ec2578 @offset=1400 fp=0xffff92fb65ec2ae8 Redzone ffff92fb65ec2570: bb bb bb bb bb bb bb bb ........ Object ffff92fb65ec2578: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec2588: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec2598: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25a8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25b8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25c8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25e8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk. Redzone ffff92fb65ec25f8: bb bb bb bb bb bb bb bb ........ Padding ffff92fb65ec2738: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ CPU: 3 PID: 180 Comm: kworker/3:2 Tainted: G BU 4.10.0-rc6-patser+ #5039 Hardware name: /NUC5PPYB, BIOS PYBSWCEL.86A.0031.2015.0601.1712 06/01/2015 Workqueue: events intel_atomic_helper_free_state [i915] Call Trace: dump_stack+0x4d/0x6d print_trailer+0x20c/0x220 free_debug_processing+0x1c6/0x330 ? drm_atomic_state_default_clear+0xf7/0x1c0 [drm] __slab_free+0x48/0x2e0 ? drm_atomic_state_default_clear+0xf7/0x1c0 [drm] kfree+0x159/0x1a0 drm_atomic_state_default_clear+0xf7/0x1c0 [drm] ? drm_atomic_state_clear+0x30/0x30 [drm] intel_atomic_state_clear+0xd/0x20 [i915] drm_atomic_state_clear+0x1a/0x30 [drm] __drm_atomic_state_free+0x13/0x60 [drm] intel_atomic_helper_free_state+0x5d/0x70 [i915] process_one_work+0x260/0x4a0 worker_thread+0x2d1/0x4f0 kthread+0x127/0x130 ? process_one_work+0x4a0/0x4a0 ? kthread_stop+0x120/0x120 ret_from_fork+0x29/0x40 FIX kmalloc-128: Object at 0xffff92fb65ec2578 not freed Fixes: 3b24f7d67581 ("drm/atomic: Add struct drm_crtc_commit to track async updates") Fixes: 9626014258a5 ("drm/fence: add in-fences support") Cc: <stable@vger.kernel.org> # v4.8+ Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1485854725-27640-1-git-send-email-maarten.lankhorst@linux.intel.com
Diffstat (limited to 'net/core/netevent.c')