R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ kernel BUG at mm/page_table_check.c:148! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 3 PID: 8153 Comm: syz-executor.2 Not tainted 6.5.0-rc2-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:__page_table_check_zero+0x409/0x5e0 mm/page_table_check.c:148 Code: 0f 84 f1 fc ff ff e8 06 55 a1 ff 48 83 ed 01 49 89 ec e9 eb fc ff ff e8 f5 54 a1 ff 0f 0b e8 ee 54 a1 ff 0f 0b e8 e7 54 a1 ff <0f> 0b e8 e0 54 a1 ff 4c 8b 63 08 31 ff 4c 89 e5 83 e5 01 48 89 ee RSP: 0018:ffffc9002a43fab0 EFLAGS: 00010283 RAX: 0000000000026ec4 RBX: 0000000000000001 RCX: ffffc9000d4a2000 RDX: 0000000000040000 RSI: ffffffff81e51c99 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 000000000009401a R12: ffff888014035e50 R13: 0000000000000001 R14: ffff888014035e94 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88802c900000(0063) knlGS:00000000f7f82b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f5ddcd80 CR3: 0000000026b85000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: page_table_check_free include/linux/page_table_check.h:46 [inline] free_pages_prepare mm/page_alloc.c:1162 [inline] free_unref_page_prepare+0x4f8/0xb90 mm/page_alloc.c:2348 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2443 hcd_buffer_free_pages+0xe8/0x180 drivers/usb/core/buffer.c:210 dec_usb_memory_use_count+0x27b/0x410 drivers/usb/core/devio.c:198 mmap_region+0x878/0x2650 mm/mmap.c:2873 do_mmap+0x884/0xee0 mm/mmap.c:1362 vm_mmap_pgoff+0x1a6/0x3b0 mm/util.c:543 ksys_mmap_pgoff+0x422/0x5b0 mm/mmap.c:1408 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f87579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f825ac EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 RAX: ffffffffffffffda RBX: 0000000020ffb000 RCX: 0000000000002000 RDX: 0000000000000005 RSI: 0000000000000011 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__page_table_check_zero+0x409/0x5e0 mm/page_table_check.c:148 Code: 0f 84 f1 fc ff ff e8 06 55 a1 ff 48 83 ed 01 49 89 ec e9 eb fc ff ff e8 f5 54 a1 ff 0f 0b e8 ee 54 a1 ff 0f 0b e8 e7 54 a1 ff <0f> 0b e8 e0 54 a1 ff 4c 8b 63 08 31 ff 4c 89 e5 83 e5 01 48 89 ee RSP: 0018:ffffc9002a43fab0 EFLAGS: 00010283 RAX: 0000000000026ec4 RBX: 0000000000000001 RCX: ffffc9000d4a2000 RDX: 0000000000040000 RSI: ffffffff81e51c99 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 000000000009401a R12: ffff888014035e50 R13: 0000000000000001 R14: ffff888014035e94 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:00000000f7f82b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000058532480 CR3: 0000000026b85000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi