R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ kernel BUG at mm/page_table_check.c:157! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 9115 Comm: syz.0.969 Not tainted 6.11.0-rc2-syzkaller-00302-gcb2e5ee8e7a0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__page_table_check_zero+0x306/0x370 mm/page_table_check.c:157 Code: ff 48 89 ef e8 ab d0 ff ff 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 08 2c 97 ff e8 03 2c 97 ff 90 0f 0b e8 fb 2b 97 ff 90 <0f> 0b e8 f3 2b 97 ff 90 0f 0b e8 ab c5 f5 ff e9 85 fd ff ff 48 c7 RSP: 0018:ffffc900041afa20 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81f3f51b RDX: ffff88801bb7a440 RSI: ffffffff81f3f635 RDI: 0000000000000005 RBP: ffff888041940000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000a R14: ffff88804194004c R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88802c000000(0063) knlGS:00000000f5716b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f5715fbc CR3: 00000000155f0000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: page_table_check_free include/linux/page_table_check.h:41 [inline] free_pages_prepare mm/page_alloc.c:1095 [inline] __free_pages_ok+0x5d4/0xbd0 mm/page_alloc.c:1214 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 usbdev_mmap+0x7a8/0xae0 drivers/usb/core/devio.c:285 call_mmap include/linux/fs.h:2129 [inline] mmap_region+0x757/0x2760 mm/mmap.c:2957 do_mmap+0xbfb/0xfb0 mm/mmap.c:1468 vm_mmap_pgoff+0x1ba/0x360 mm/util.c:588 ksys_mmap_pgoff+0x332/0x5d0 mm/mmap.c:1514 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f64579 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:00000000f571656c EFLAGS: 00000296 ORIG_RAX: 00000000000000c0 RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000400000 RDX: 000000000000000f RSI: 0000000000011012 RDI: 0000000000000004 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+0x306/0x370 mm/page_table_check.c:157 Code: ff 48 89 ef e8 ab d0 ff ff 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 08 2c 97 ff e8 03 2c 97 ff 90 0f 0b e8 fb 2b 97 ff 90 <0f> 0b e8 f3 2b 97 ff 90 0f 0b e8 ab c5 f5 ff e9 85 fd ff ff 48 c7 RSP: 0018:ffffc900041afa20 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81f3f51b RDX: ffff88801bb7a440 RSI: ffffffff81f3f635 RDI: 0000000000000005 RBP: ffff888041940000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000a R14: ffff88804194004c R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5716b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000572de4ac CR3: 00000000155f0000 CR4: 0000000000350ef0 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