BUG: unable to handle page fault for address: fffff520014e9c04
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 7ffcd067 P4D 7ffcd067 PUD 2cd1d067 PMD 28fc8067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 2 PID: 19613 Comm: kworker/2:0 Not tainted 5.5.0-rc5-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:bytes_is_nonzero mm/kasan/generic.c:92 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:113 [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+0xe9/0x1a0 mm/kasan/generic.c:192
Code: 85 c0 75 67 5b 41 5c 41 5d 5d c3 41 bd 08 00 00 00 45 29 c5 4d 89 e0 4f 8d 4c 25 00 eb 0c 49 83 c0 01 4c 89 c8 4d 39 c8 74 10 <41> 80 38 00 74 ee 4b 8d 44 25 00 4d 85 c0 75 31 49 89 d9 49 29 c1
RSP: 0018:ffffc90005db7c30 EFLAGS: 00010202
RAX: fffff520014e9c04 RBX: fffff520014e9e00 RCX: ffffffff840623dc
RDX: 0000000000000001 RSI: 0000000000000fe0 RDI: ffffc9000a74e020
RBP: ffffc90005db7c48 R08: fffff520014e9c04 R09: fffff520014e9c08
R10: fffff520014e9dff R11: ffffc9000a74efff R12: fffff520014e9c04
R13: 0000000000000004 R14: ffffc90008a6f020 R15: ffffc90008a6f020
FS:  0000000000000000(0000) GS:ffff88802d200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520014e9c04 CR3: 0000000023883000 CR4: 0000000000340ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 memcpy+0x38/0x50 mm/kasan/common.c:126
 memcpy include/linux/string.h:380 [inline]
 drm_fb_helper_dirty_blit_real drivers/gpu/drm/drm_fb_helper.c:399 [inline]
 drm_fb_helper_dirty_work+0x44c/0x780 drivers/gpu/drm/drm_fb_helper.c:428
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2264
 worker_thread+0x98/0xe40 kernel/workqueue.c:2410
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: fffff520014e9c04
---[ end trace 63e3bdedb8311252 ]---
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:92 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:113 [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+0xe9/0x1a0 mm/kasan/generic.c:192
Code: 85 c0 75 67 5b 41 5c 41 5d 5d c3 41 bd 08 00 00 00 45 29 c5 4d 89 e0 4f 8d 4c 25 00 eb 0c 49 83 c0 01 4c 89 c8 4d 39 c8 74 10 <41> 80 38 00 74 ee 4b 8d 44 25 00 4d 85 c0 75 31 49 89 d9 49 29 c1
RSP: 0018:ffffc90005db7c30 EFLAGS: 00010202
RAX: fffff520014e9c04 RBX: fffff520014e9e00 RCX: ffffffff840623dc
RDX: 0000000000000001 RSI: 0000000000000fe0 RDI: ffffc9000a74e020
RBP: ffffc90005db7c48 R08: fffff520014e9c04 R09: fffff520014e9c08
R10: fffff520014e9dff R11: ffffc9000a74efff R12: fffff520014e9c04
R13: 0000000000000004 R14: ffffc90008a6f020 R15: ffffc90008a6f020
FS:  0000000000000000(0000) GS:ffff88802d200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520014e9c04 CR3: 0000000023883000 CR4: 0000000000340ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400