BUG: unable to handle page fault for address: fffff5200179c004
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 7ffcd067 P4D 7ffcd067 PUD 2cd1a067 PMD 22e48067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 2 PID: 10427 Comm: kworker/2:4 Not tainted 5.6.0-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: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+0xe0/0x190 mm/kasan/generic.c:192
Code: 00 00 4d 85 c0 75 61 5b 5d 41 5c c3 41 bc 08 00 00 00 45 29 c4 49 89 d8 4d 8d 0c 1c eb 0c 49 83 c0 01 4c 89 c8 4d 39 c8 74 0f <41> 80 38 00 74 ee 49 8d 04 1c 4d 85 c0 75 2f 49 89 e9 49 29 c1 e9
RSP: 0018:ffffc9000177fc58 EFLAGS: 00010202
RAX: fffff5200179c004 RBX: fffff5200179c004 RCX: ffffffff83f52505
RDX: 0000000000000001 RSI: 0000000000000fe0 RDI: ffffc9000bce0020
RBP: fffff5200179c200 R08: fffff5200179c004 R09: fffff5200179c008
R10: fffff5200179c1ff R11: ffffc9000bce0fff R12: 0000000000000004
R13: ffffc90009f91020 R14: ffff888076c2a600 R15: ffff888029d8e168
FS:  0000000000000000(0000) GS:ffff88802d200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff5200179c004 CR3: 00000000638c8000 CR4: 0000000000340ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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:2266
 worker_thread+0x96/0xe20 kernel/workqueue.c:2412
 kthread+0x357/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: fffff5200179c004
---[ end trace 6e35c1b73d9c4f89 ]---
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+0xe0/0x190 mm/kasan/generic.c:192
Code: 00 00 4d 85 c0 75 61 5b 5d 41 5c c3 41 bc 08 00 00 00 45 29 c4 49 89 d8 4d 8d 0c 1c eb 0c 49 83 c0 01 4c 89 c8 4d 39 c8 74 0f <41> 80 38 00 74 ee 49 8d 04 1c 4d 85 c0 75 2f 49 89 e9 49 29 c1 e9
RSP: 0018:ffffc9000177fc58 EFLAGS: 00010202
RAX: fffff5200179c004 RBX: fffff5200179c004 RCX: ffffffff83f52505
RDX: 0000000000000001 RSI: 0000000000000fe0 RDI: ffffc9000bce0020
RBP: fffff5200179c200 R08: fffff5200179c004 R09: fffff5200179c008
R10: fffff5200179c1ff R11: ffffc9000bce0fff R12: 0000000000000004
R13: ffffc90009f91020 R14: ffff888076c2a600 R15: ffff888029d8e168
FS:  0000000000000000(0000) GS:ffff88802d200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff5200179c004 CR3: 00000000638c8000 CR4: 0000000000340ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400