BUG: unable to handle page fault for address: fffff520056213fc
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 7ffcd067 P4D 7ffcd067 PUD 2c91e067 PMD 653f3067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 27045 Comm: kworker/1:2 Not tainted 5.8.0-rc6-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:91 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:134 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline]
RIP: 0010:check_memory_region_inline mm/kasan/generic.c:183 [inline]
RIP: 0010:check_memory_region+0xdb/0x180 mm/kasan/generic.c:192
Code: 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 <80> 38 00 74 f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c
RSP: 0018:ffffc90000937c08 EFLAGS: 00010296
RAX: fffff520056213fc RBX: fffff52005621400 RCX: ffffffff8406a3e5
RDX: fffff52005621400 RSI: 0000000000000020 RDI: ffffc9002b109fe0
RBP: fffff520056213fc R08: 0000000000000001 R09: ffffc9002b109fff
R10: fffff520056213ff R11: 0000000000000000 R12: 0000000000000020
R13: ffffc9002b109fe0 R14: ffffc9000a29cfe0 R15: ffff888029c67600
FS:  0000000000000000(0000) GS:ffff88802cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520056213fc CR3: 000000006e1e9000 CR4: 0000000000340ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 memcpy+0x39/0x60 mm/kasan/common.c:106
 memcpy include/linux/string.h:406 [inline]
 drm_fb_helper_dirty_blit_real drivers/gpu/drm/drm_fb_helper.c:402 [inline]
 drm_fb_helper_dirty_work+0x405/0x730 drivers/gpu/drm/drm_fb_helper.c:431
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Modules linked in:
CR2: fffff520056213fc
---[ end trace 8d7ee9566d3c47f8 ]---
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:91 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:134 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline]
RIP: 0010:check_memory_region_inline mm/kasan/generic.c:183 [inline]
RIP: 0010:check_memory_region+0xdb/0x180 mm/kasan/generic.c:192
Code: 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 <80> 38 00 74 f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c
RSP: 0018:ffffc90000937c08 EFLAGS: 00010296
RAX: fffff520056213fc RBX: fffff52005621400 RCX: ffffffff8406a3e5
RDX: fffff52005621400 RSI: 0000000000000020 RDI: ffffc9002b109fe0
RBP: fffff520056213fc R08: 0000000000000001 R09: ffffc9002b109fff
R10: fffff520056213ff R11: 0000000000000000 R12: 0000000000000020
R13: ffffc9002b109fe0 R14: ffffc9000a29cfe0 R15: ffff888029c67600
FS:  0000000000000000(0000) GS:ffff88802cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520056213fc CR3: 000000006e1e9000 CR4: 0000000000340ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400