------------[ cut here ]------------ kernel BUG at mm/memory.c:2230! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 5207 Comm: syz.2.447 Not tainted 6.1.101-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:vmf_insert_pfn_prot+0x2b3/0x2d0 mm/memory.c:2230 Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 77 03 be ff b8 02 00 00 00 eb c4 e8 6b 03 be ff 0f 0b e8 64 03 be ff 0f 0b e8 5d 03 be ff <0f> 0b e8 06 42 d8 08 e8 51 03 be ff 0f 0b 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc9000324f900 EFLAGS: 00010287 RAX: ffffffff81cc9833 RBX: 0000000000000420 RCX: 0000000000040000 RDX: ffffc9000572a000 RSI: 000000000000060b RDI: 000000000000060c RBP: ffffc9000324f9c0 R08: ffffffff81cc967d R09: ffffffff81cc9651 R10: 0000000000000002 R11: ffff888025928000 R12: ffffc9000324f940 R13: ffff88807f0e80d8 R14: 1ffff92000649f24 R15: 000000000c040471 FS: 00007f6f979ff6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020019680 CR3: 0000000052dba000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: drm_gem_shmem_fault+0x1d9/0x230 drivers/gpu/drm/drm_gem_shmem_helper.c:562 __do_fault+0x136/0x4f0 mm/memory.c:4261 do_read_fault mm/memory.c:4612 [inline] do_fault mm/memory.c:4741 [inline] handle_pte_fault mm/memory.c:5013 [inline] __handle_mm_fault mm/memory.c:5155 [inline] handle_mm_fault+0x3412/0x5340 mm/memory.c:5276 do_user_addr_fault arch/x86/mm/fault.c:1340 [inline] handle_page_fault arch/x86/mm/fault.c:1431 [inline] exc_page_fault+0x26f/0x620 arch/x86/mm/fault.c:1487 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:copy_user_short_string+0xa/0x40 arch/x86/lib/copy_user_64.S:232 Code: 83 f8 12 74 0a 89 d1 f3 a4 89 c8 0f 01 ca c3 89 d0 0f 01 ca c3 01 ca eb e7 0f 1f 80 00 00 00 00 89 d1 83 e2 07 c1 e9 03 74 12 <4c> 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 RSP: 0018:ffffc9000324fe30 EFLAGS: 00050202 RAX: ffffffff8438a701 RBX: 00007fffffffeff8 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000020000080 RDI: ffffc9000324fea0 RBP: ffffc9000324ff20 R08: dffffc0000000000 R09: fffff52000649fd5 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000008 R13: 0000000000000000 R14: ffffc9000324fea0 R15: 0000000020000080 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline] _copy_from_user+0xf3/0x170 lib/usercopy.c:23 copy_from_user include/linux/uaccess.h:161 [inline] __do_sys_signalfd4 fs/signalfd.c:309 [inline] __se_sys_signalfd4 fs/signalfd.c:302 [inline] __x64_sys_signalfd4+0x12d/0x1b0 fs/signalfd.c:302 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f6f97b77299 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6f979ff048 EFLAGS: 00000246 ORIG_RAX: 0000000000000121 RAX: ffffffffffffffda RBX: 00007f6f97d05f80 RCX: 00007f6f97b77299 RDX: 0000000000000008 RSI: 0000000020000080 RDI: ffffffffffffffff RBP: 00007f6f97be48e6 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f6f97d05f80 R15: 00007ffe4574ef78 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vmf_insert_pfn_prot+0x2b3/0x2d0 mm/memory.c:2230 Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 77 03 be ff b8 02 00 00 00 eb c4 e8 6b 03 be ff 0f 0b e8 64 03 be ff 0f 0b e8 5d 03 be ff <0f> 0b e8 06 42 d8 08 e8 51 03 be ff 0f 0b 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc9000324f900 EFLAGS: 00010287 RAX: ffffffff81cc9833 RBX: 0000000000000420 RCX: 0000000000040000 RDX: ffffc9000572a000 RSI: 000000000000060b RDI: 000000000000060c RBP: ffffc9000324f9c0 R08: ffffffff81cc967d R09: ffffffff81cc9651 R10: 0000000000000002 R11: ffff888025928000 R12: ffffc9000324f940 R13: ffff88807f0e80d8 R14: 1ffff92000649f24 R15: 000000000c040471 FS: 00007f6f979ff6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc136794d58 CR3: 0000000052dba000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 83 f8 12 cmp $0x12,%eax 3: 74 0a je 0xf 5: 89 d1 mov %edx,%ecx 7: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) 9: 89 c8 mov %ecx,%eax b: 0f 01 ca clac e: c3 ret f: 89 d0 mov %edx,%eax 11: 0f 01 ca clac 14: c3 ret 15: 01 ca add %ecx,%edx 17: eb e7 jmp 0x0 19: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 20: 89 d1 mov %edx,%ecx 22: 83 e2 07 and $0x7,%edx 25: c1 e9 03 shr $0x3,%ecx 28: 74 12 je 0x3c * 2a: 4c 8b 06 mov (%rsi),%r8 <-- trapping instruction 2d: 4c 89 07 mov %r8,(%rdi) 30: 48 8d 76 08 lea 0x8(%rsi),%rsi 34: 48 8d 7f 08 lea 0x8(%rdi),%rdi 38: ff c9 dec %ecx 3a: 75 ee jne 0x2a 3c: 21 d2 and %edx,%edx 3e: 74 10 je 0x50