BUG: unable to handle page fault for address: fffff520014e9c00
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 7ffcd067 P4D 7ffcd067 PUD 2cd1a067 PMD 2888e067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.6.0-rc4-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: events drm_fb_helper_dirty_work
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:121 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline]
RIP: 0010:check_memory_region_inline mm/kasan/generic.c:182 [inline]
RIP: 0010:check_memory_region+0x96/0x190 mm/kasan/generic.c:192
Code: c9 4d 0f 49 c1 49 c1 f8 03 45 85 c0 0f 84 08 01 00 00 41 83 e8 01 4e 8d 44 c0 08 eb 0d 48 83 c0 08 4c 39 c0 0f 84 9f 00 00 00 <48> 83 38 00 74 ed 4c 8d 40 08 eb 09 48 83 c0 01 49 39 c0 74 4f 80
RSP: 0018:ffffc9000038fc58 EFLAGS: 00010216
RAX: fffff520014e9c00 RBX: fffff520014e9c00 RCX: ffffffff83f50205
RDX: 0000000000000001 RSI: 0000000000001000 RDI: ffffc9000a74e000
RBP: fffff520014e9e00 R08: fffff520014e9e00 R09: 0000000000000200
R10: fffff520014e9dff R11: ffffc9000a74efff R12: 0000000000001000
R13: ffffc9000882f000 R14: ffff888028476400 R15: ffff888078d53168
FS:  0000000000000000(0000) GS:ffff88802d000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520014e9c00 CR3: 0000000061829000 CR4: 0000000000340ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 memcpy+0x35/0x50 mm/kasan/common.c:128
 memcpy include/linux/string.h:381 [inline]
 drm_fb_helper_dirty_blit_real drivers/gpu/drm/drm_fb_helper.c:396 [inline]
 drm_fb_helper_dirty_work+0x3f5/0x6b0 drivers/gpu/drm/drm_fb_helper.c:425
 process_one_work+0x94b/0x1690 kernel/workqueue.c:2264
 worker_thread+0x96/0xe20 kernel/workqueue.c:2410
 kthread+0x357/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: fffff520014e9c00
---[ end trace 9afd33b3c50b7370 ]---
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:121 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline]
RIP: 0010:check_memory_region_inline mm/kasan/generic.c:182 [inline]
RIP: 0010:check_memory_region+0x96/0x190 mm/kasan/generic.c:192
Code: c9 4d 0f 49 c1 49 c1 f8 03 45 85 c0 0f 84 08 01 00 00 41 83 e8 01 4e 8d 44 c0 08 eb 0d 48 83 c0 08 4c 39 c0 0f 84 9f 00 00 00 <48> 83 38 00 74 ed 4c 8d 40 08 eb 09 48 83 c0 01 49 39 c0 74 4f 80
RSP: 0018:ffffc9000038fc58 EFLAGS: 00010216
RAX: fffff520014e9c00 RBX: fffff520014e9c00 RCX: ffffffff83f50205
RDX: 0000000000000001 RSI: 0000000000001000 RDI: ffffc9000a74e000
RBP: fffff520014e9e00 R08: fffff520014e9e00 R09: 0000000000000200
R10: fffff520014e9dff R11: ffffc9000a74efff R12: 0000000000001000
R13: ffffc9000882f000 R14: ffff888028476400 R15: ffff888078d53168
FS:  0000000000000000(0000) GS:ffff88802d000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520014e9c00 CR3: 0000000061829000 CR4: 0000000000340ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600