arg_start 7ffe85206ec5 arg_end 7ffe85206edd env_start 7ffe85206edd env_end 7ffe85206fe0 binfmt ffffffff89544d80 flags cd core_state ffffc90001777b40 ioctx_table 0000000000000000 owner ffff8880a7468380 exe_file ffff8880a93b2d40 ------------[ cut here ]------------ kernel BUG at mm/khugepaged.c:469! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 6852 Comm: syz-executor729 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__khugepaged_enter+0x316/0x320 mm/khugepaged.c:469 Code: 03 38 c1 0f 8c 7e fd ff ff 48 89 df e8 b3 ae fc ff e9 71 fd ff ff e8 b9 d8 bc ff eb 05 e8 b2 d8 bc ff 4c 89 f7 e8 0a ca eb ff <0f> 0b 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 54 53 49 89 RSP: 0018:ffffc90001707aa8 EFLAGS: 00010292 RAX: 0000000000000365 RBX: ffff8880945b5640 RCX: a87539d00bd46c00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff815e2c59 R09: ffffed1015d062c0 R10: ffffed1015d062c0 R11: 0000000000000000 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff8880945b5100 R15: ffff888092fe9420 FS: 00007fa95a15b700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa95a139e78 CR3: 000000009d495000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: khugepaged_enter include/linux/khugepaged.h:62 [inline] do_huge_pmd_anonymous_page+0x358/0xd40 mm/huge_memory.c:706 create_huge_pmd mm/memory.c:4108 [inline] __handle_mm_fault mm/memory.c:4329 [inline] handle_mm_fault+0x1e25/0x29a0 mm/memory.c:4456 do_user_addr_fault+0x515/0xa90 arch/x86/mm/fault.c:1294 handle_page_fault arch/x86/mm/fault.c:1351 [inline] exc_page_fault+0x124/0x1f0 arch/x86/mm/fault.c:1404 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:538 RIP: 0010:copy_user_generic_unrolled+0x89/0xc0 arch/x86/lib/copy_user_64.S:91 Code: 38 4c 89 47 20 4c 89 4f 28 4c 89 57 30 4c 89 5f 38 48 8d 76 40 48 8d 7f 40 ff c9 75 b6 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 89 d1 8a RSP: 0018:ffffc90001707e38 EFLAGS: 00010206 RAX: ffffffff839f5b01 RBX: 0000000020000031 RCX: 0000000000000006 RDX: 0000000000000001 RSI: ffff888095324800 RDI: 0000000020000000 RBP: 0000000000000031 R08: 312020205b3e353c R09: ffffed1012a64907 R10: ffffed1012a64907 R11: 0000000000000000 R12: 0000000000000031 R13: 00007ffffffff000 R14: ffff888095324800 R15: 0000000020000000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:74 [inline] _copy_to_user+0x100/0x140 lib/usercopy.c:30 copy_to_user include/linux/uaccess.h:168 [inline] syslog_print_all kernel/printk/printk.c:1508 [inline] do_syslog+0xf31/0x16e0 kernel/printk/printk.c:1579 __do_sys_syslog kernel/printk/printk.c:1656 [inline] __se_sys_syslog kernel/printk/printk.c:1654 [inline] __x64_sys_syslog+0x78/0x90 kernel/printk/printk.c:1654 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4467d9 Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 db 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa95a15adb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000067 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004467d9 RDX: 00000000000000ce RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 00007fa95a15b700 R09: 0000000000000000 R10: 00007fa95a15b700 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007ffe8520542f R14: 00007fa95a15b9c0 R15: 000000000000002d Modules linked in: ---[ end trace a51a5a7c5a3fe671 ]--- RIP: 0010:__khugepaged_enter+0x316/0x320 mm/khugepaged.c:469 Code: 03 38 c1 0f 8c 7e fd ff ff 48 89 df e8 b3 ae fc ff e9 71 fd ff ff e8 b9 d8 bc ff eb 05 e8 b2 d8 bc ff 4c 89 f7 e8 0a ca eb ff <0f> 0b 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 54 53 49 89 RSP: 0018:ffffc90001707aa8 EFLAGS: 00010292 RAX: 0000000000000365 RBX: ffff8880945b5640 RCX: a87539d00bd46c00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff815e2c59 R09: ffffed1015d062c0 R10: ffffed1015d062c0 R11: 0000000000000000 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff8880945b5100 R15: ffff888092fe9420 FS: 00007fa95a15b700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 000000009d495000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400