general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 14633 Comm: syz-executor.1 Not tainted 5.10.0-rc3-next-20201116-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:drm_atomic_set_crtc_for_connector+0x426/0x5f0 drivers/gpu/drm/drm_atomic_uapi.c:342 Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e a6 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 8b 4d 28 <80> 38 00 0f 85 83 01 00 00 48 8b 2c 25 00 00 00 00 48 b8 00 00 00 RSP: 0018:ffffc9000c057a80 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88801aec6700 RCX: 0000000000000022 RDX: 1ffff11028711a66 RSI: ffffffff84302d10 RDI: ffff88814388d330 RBP: 0000000000000000 R08: ffff8880140a4420 R09: ffff88814388d343 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801a19a800 R13: ffff88814388d308 R14: ffff88801aec6708 R15: ffff888012f39380 FS: 00007fa4257cc700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000768000 CR3: 0000000024a59000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: update_output_state drivers/gpu/drm/drm_atomic.c:1454 [inline] __drm_atomic_helper_set_config+0x72a/0xe80 drivers/gpu/drm/drm_atomic.c:1568 drm_client_modeset_commit_atomic+0x527/0x7c0 drivers/gpu/drm/drm_client_modeset.c:1023 drm_client_modeset_commit_locked+0x145/0x580 drivers/gpu/drm/drm_client_modeset.c:1145 drm_client_modeset_commit+0x4d/0x80 drivers/gpu/drm/drm_client_modeset.c:1171 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:252 [inline] __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:231 [inline] drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:279 [inline] drm_fb_helper_lastclose drivers/gpu/drm/drm_fb_helper.c:1942 [inline] drm_fbdev_client_restore+0xe3/0x1a0 drivers/gpu/drm/drm_fb_helper.c:2334 drm_client_dev_restore+0x17f/0x270 drivers/gpu/drm/drm_client.c:226 drm_lastclose drivers/gpu/drm/drm_file.c:468 [inline] drm_release+0x441/0x530 drivers/gpu/drm/drm_file.c:499 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:274 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4179b1 Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 6a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 b3 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fa4257cb820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffea RBX: 6666666666666667 RCX: 00000000004179b1 RDX: 0000000000000000 RSI: 000000000000c501 RDI: 00007fa4257cb850 RBP: 000000000118bf60 R08: 000000000000000f R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000293 R12: 000000000118bf2c R13: 00007fff5f3772af R14: 00007fa4257cc9c0 R15: 000000000118bf2c Modules linked in: ---[ end trace cb63a9724c8bb1c4 ]--- RIP: 0010:drm_atomic_set_crtc_for_connector+0x426/0x5f0 drivers/gpu/drm/drm_atomic_uapi.c:342 Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e a6 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 8b 4d 28 <80> 38 00 0f 85 83 01 00 00 48 8b 2c 25 00 00 00 00 48 b8 00 00 00 RSP: 0018:ffffc9000c057a80 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88801aec6700 RCX: 0000000000000022 RDX: 1ffff11028711a66 RSI: ffffffff84302d10 RDI: ffff88814388d330 RBP: 0000000000000000 R08: ffff8880140a4420 R09: ffff88814388d343 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801a19a800 R13: ffff88814388d308 R14: ffff88801aec6708 R15: ffff888012f39380 FS: 00007fa4257cc700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f29f083e008 CR3: 0000000024a59000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600