IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 0 PID: 9831 Comm: syz-executor6 Not tainted 4.18.0-rc3-next-20180706+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:83 Code: 48 c1 ea 03 80 3c 02 00 0f 85 80 00 00 00 48 8b 9b 50 12 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 38 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 51 44 8b 63 38 31 ff 41 83 e4 01 RSP: 0018:ffff88019382e688 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005427000 RDX: 0000000000000007 RSI: ffffffff817d8ba1 RDI: 0000000000000038 RBP: ffff88019382e6a0 R08: ffffed00338291b1 R09: 0000000000000001 R10: ffff88019382e7b0 R11: ffff88019c148d83 R12: ffff8801d70e4280 R13: ffff88019c148600 R14: ffff88019c14863c R15: 0000000000000002 FS: 00007f02088eb700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f020890bc88 CR3: 0000000193432000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: delayacct_blkio_end include/linux/delayacct.h:128 [inline] try_to_wake_up+0xacb/0x12b0 kernel/sched/core.c:2056 default_wake_function+0x30/0x50 kernel/sched/core.c:3739 autoremove_wake_function+0x80/0x370 kernel/sched/wait.c:373 wake_page_function+0x15f/0x1c0 mm/filemap.c:989 __wake_up_common+0x191/0x740 kernel/sched/wait.c:90 __wake_up_locked_key_bookmark+0x16/0x20 kernel/sched/wait.c:165 wake_up_page_bit+0x2ab/0x5b0 mm/filemap.c:1009 unlock_page+0x223/0x2c0 mm/filemap.c:1186 do_huge_pmd_wp_page+0x13f6/0x45a0 mm/huge_memory.c:1286 wp_huge_pmd mm/memory.c:3879 [inline] __handle_mm_fault+0x231c/0x4480 mm/memory.c:4092 handle_mm_fault+0x53e/0xc80 mm/memory.c:4139 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1397 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1472 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0010:copy_user_generic_unrolled+0x89/0xc0 arch/x86/lib/copy_user_64.S:66 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:ffff88019382fa58 EFLAGS: 00010202 RAX: ffffed0032705f60 RBX: 0000000000000020 RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffff88019382fae0 RDI: 0000000020000400 RBP: ffff88019382fa90 R08: 0000000000000013 R09: ffffed0032705f5c R10: ffffed0032705f5f R11: ffff88019382faff R12: 0000000020000420 R13: 0000000020000400 R14: ffff88019382fae0 R15: 00007ffffffff000 copy_to_user include/linux/uaccess.h:155 [inline] userfaultfd_read+0x17e/0x2c0 fs/userfaultfd.c:1194 __vfs_read+0x117/0xa80 fs/read_write.c:416 vfs_read+0x17f/0x3c0 fs/read_write.c:452 ksys_read+0x101/0x260 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455ba9 Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f02088eac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f02088eb6d4 RCX: 0000000000455ba9 RDX: 0000000000000064 RSI: 0000000020000400 RDI: 0000000000000013 RBP: 000000000072bf48 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c00c1 R14: 00000000004d0948 R15: 0000000000000001 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 0f5dafb6789e74f4 ]--- RIP: 0010:__delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:83 Code: 48 c1 ea 03 80 3c 02 00 0f 85 80 00 00 00 48 8b 9b 50 12 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 38 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 51 44 8b 63 38 31 ff 41 83 e4 01 RSP: 0018:ffff88019382e688 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005427000 RDX: 0000000000000007 RSI: ffffffff817d8ba1 RDI: 0000000000000038 RBP: ffff88019382e6a0 R08: ffffed00338291b1 R09: 0000000000000001 R10: ffff88019382e7b0 R11: ffff88019c148d83 R12: ffff8801d70e4280 R13: ffff88019c148600 R14: ffff88019c14863c R15: 0000000000000002 FS: 00007f02088eb700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f020890bc88 CR3: 0000000193432000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400