BUG: unable to handle page fault for address: ffffc900067db000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 10c00067 P4D 10c00067 PUD 10dc4067 PMD 19c90067 PTE 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 2 PID: 5017 Comm: kworker/2:9 Not tainted 5.18.0-syzkaller-10643-g9d004b2f4fea #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: events drm_fb_helper_damage_work
RIP: 0010:rep_movs arch/x86/lib/iomem.c:12 [inline]
RIP: 0010:string_memcpy_toio arch/x86/lib/iomem.c:56 [inline]
RIP: 0010:memcpy_toio+0x83/0xe0 arch/x86/lib/iomem.c:102
Code: 5b fd 49 89 dd 31 ff 41 83 e5 02 4c 89 ee e8 54 0f 5b fd 4d 85 ed 75 2e e8 ea 12 5b fd 48 89 e9 48 89 df 4c 89 e6 48 c1 e9 02 <f3> a5 40 f6 c5 02 74 02 66 a5 40 f6 c5 01 74 01 a4 5b 5d 41 5c 41
RSP: 0018:ffffc90028d9fbc0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: ffffc900067db000 RCX: 0000000000000400
RDX: ffff888019cb9d80 RSI: ffffc90004514000 RDI: ffffc900067db000
RBP: 0000000000001000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc90004514000
R13: 0000000000000000 R14: ffffc90004514000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900067db000 CR3: 000000006f26e000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
iosys_map_memcpy_to include/linux/iosys-map.h:276 [inline]
drm_fb_helper_damage_blit_real drivers/gpu/drm/drm_fb_helper.c:388 [inline]
drm_fb_helper_damage_blit drivers/gpu/drm/drm_fb_helper.c:419 [inline]
drm_fb_helper_damage_work+0x733/0xac0 drivers/gpu/drm/drm_fb_helper.c:450
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
</TASK>
Modules linked in:
CR2: ffffc900067db000
---[ end trace 0000000000000000 ]---
RIP: 0010:rep_movs arch/x86/lib/iomem.c:12 [inline]
RIP: 0010:string_memcpy_toio arch/x86/lib/iomem.c:56 [inline]
RIP: 0010:memcpy_toio+0x83/0xe0 arch/x86/lib/iomem.c:102
Code: 5b fd 49 89 dd 31 ff 41 83 e5 02 4c 89 ee e8 54 0f 5b fd 4d 85 ed 75 2e e8 ea 12 5b fd 48 89 e9 48 89 df 4c 89 e6 48 c1 e9 02 <f3> a5 40 f6 c5 02 74 02 66 a5 40 f6 c5 01 74 01 a4 5b 5d 41 5c 41
RSP: 0018:ffffc90028d9fbc0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: ffffc900067db000 RCX: 0000000000000400
RDX: ffff888019cb9d80 RSI: ffffc90004514000 RDI: ffffc900067db000
RBP: 0000000000001000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc90004514000
R13: 0000000000000000 R14: ffffc90004514000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900067db000 CR3: 000000006f26e000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 5b pop %rbx
1: fd std
2: 49 89 dd mov %rbx,%r13
5: 31 ff xor %edi,%edi
7: 41 83 e5 02 and $0x2,%r13d
b: 4c 89 ee mov %r13,%rsi
e: e8 54 0f 5b fd callq 0xfd5b0f67
13: 4d 85 ed test %r13,%r13
16: 75 2e jne 0x46
18: e8 ea 12 5b fd callq 0xfd5b1307
1d: 48 89 e9 mov %rbp,%rcx
20: 48 89 df mov %rbx,%rdi
23: 4c 89 e6 mov %r12,%rsi
26: 48 c1 e9 02 shr $0x2,%rcx
* 2a: f3 a5 rep movsl %ds:(%rsi),%es:(%rdi) <-- trapping instruction
2c: 40 f6 c5 02 test $0x2,%bpl
30: 74 02 je 0x34
32: 66 a5 movsw %ds:(%rsi),%es:(%rdi)
34: 40 f6 c5 01 test $0x1,%bpl
38: 74 01 je 0x3b
3a: a4 movsb %ds:(%rsi),%es:(%rdi)
3b: 5b pop %rbx
3c: 5d pop %rbp
3d: 41 5c pop %r12
3f: 41 rex.B