BUG: unable to handle page fault for address: fffff520016dddfc
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 7ffcd067 P4D 7ffcd067 PUD 2cd1d067 PMD 76cdd067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 3 PID: 8060 Comm: kworker/3:3 Not tainted 5.5.0-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:109 [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+0x123/0x1a0 mm/kasan/generic.c:192
Code: 49 89 d9 49 29 c1 e9 68 ff ff ff 5b b8 01 00 00 00 41 5c 41 5d 5d c3 4d 85 c9 74 ef 4d 01 e1 eb 09 48 83 c0 01 4c 39 c8 74 e1 <80> 38 00 74 f2 eb 8c 4d 39 c2 74 4d e8 4c e2 ff ff 31 c0 5b 41 5c
RSP: 0018:ffffc90005597c20 EFLAGS: 00010296
RAX: fffff520016dddfc RBX: fffff520016dde00 RCX: ffffffff840736cc
RDX: 0000000000000001 RSI: 0000000000000020 RDI: ffffc9000b6eefe0
RBP: ffffc90005597c38 R08: 1ffff920016dddfc R09: fffff520016dde00
R10: fffff520016dddff R11: ffffc9000b6eefff R12: fffff520016dddfc
R13: ffffc9000b6eefe0 R14: ffffc9000af6ffe0 R15: ffffc9000af6ffe0
FS:  0000000000000000(0000) GS:ffff88802d300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520016dddfc CR3: 000000005d9f8000 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+0xa05/0x17a0 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: fffff520016dddfc
---[ end trace 8b1b99d5c53d7c34 ]---
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:92 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:109 [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+0x123/0x1a0 mm/kasan/generic.c:192
Code: 49 89 d9 49 29 c1 e9 68 ff ff ff 5b b8 01 00 00 00 41 5c 41 5d 5d c3 4d 85 c9 74 ef 4d 01 e1 eb 09 48 83 c0 01 4c 39 c8 74 e1 <80> 38 00 74 f2 eb 8c 4d 39 c2 74 4d e8 4c e2 ff ff 31 c0 5b 41 5c
RSP: 0018:ffffc90005597c20 EFLAGS: 00010296
RAX: fffff520016dddfc RBX: fffff520016dde00 RCX: ffffffff840736cc
RDX: 0000000000000001 RSI: 0000000000000020 RDI: ffffc9000b6eefe0
RBP: ffffc90005597c38 R08: 1ffff920016dddfc R09: fffff520016dde00
R10: fffff520016dddff R11: ffffc9000b6eefff R12: fffff520016dddfc
R13: ffffc9000b6eefe0 R14: ffffc9000af6ffe0 R15: ffffc9000af6ffe0
FS:  0000000000000000(0000) GS:ffff88802d300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520016dddfc CR3: 000000005d9f8000 CR4: 0000000000340ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400