raw: 00000000000027ed ffff88018e7565e8 00000003ffffffff ffff8801b463a1c0 page dumped because: VM_BUG_ON_PAGE(page_to_pgoff(page) != index) page->mem_cgroup:ffff8801b463a1c0 ------------[ cut here ]------------ IPVS: sync thread started: state = BACKUP, mcast_ifn = veth1_to_bond, syncid = 0, id = 0 kernel BUG at mm/shmem.c:815! IPVS: stopping backup sync thread 19842 ... invalid opcode: 0000 [#1] SMP KASAN CPU: 1 PID: 19801 Comm: syz-executor4 Not tainted 4.18.0-rc3-next-20180706+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 IPVS: sync thread started: state = BACKUP, mcast_ifn = veth1_to_bond, syncid = 0, id = 0 RIP: 0010:shmem_undo_range+0xdaa/0x29a0 mm/shmem.c:815 Code: 00 0f 85 bd 19 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e IPVS: stopping backup sync thread 19853 ... 41 5f 5d c3 e8 a5 f0 d6 ff 48 c7 c6 e0 32 f1 87 4c 89 e7 e8 16 10 05 00 <0f> 0b e8 8f f0 d6 ff 49 8d 7c 24 20 48 89 f8 48 c1 e8 03 80 3c 18 RSP: 0018:ffff8801ca12eb80 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000011977 RSI: ffffffff81aaab95 RDI: ffffed0039425d60 RBP: ffff8801ca12f2f8 R08: ffff88019db10080 R09: ffffed003b5e4fc0 R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: ffffea000634fac0 R13: ffff8801ca12f2d0 R14: 0000000000000001 R15: 00000000000027ed FS: 00007f81ecc6b700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f26d7509518 CR3: 0000000195d56000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: shmem_truncate_range+0x27/0xa0 mm/shmem.c:971 shmem_evict_inode+0x3b2/0xcb0 mm/shmem.c:1071 evict+0x4ae/0x990 fs/inode.c:558 iput_final fs/inode.c:1508 [inline] iput+0x635/0xaa0 fs/inode.c:1534 dentry_unlink_inode+0x4ae/0x640 fs/dcache.c:377 __dentry_kill+0x44c/0x7a0 fs/dcache.c:569 dentry_kill+0xc9/0x5a0 fs/dcache.c:688 dput.part.26+0x66b/0x7a0 fs/dcache.c:849 dput+0x15/0x20 fs/dcache.c:831 __fput+0x558/0x930 fs/file_table.c:235 ____fput+0x15/0x20 fs/file_table.c:251 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:192 [inline] exit_to_usermode_loop+0x313/0x370 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x40fc81 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f81ecc6aa80 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f81ecc6ab30 RCX: 000000000040fc81 RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000015 RBP: 0000000020000100 R08: 00007f81ecc6ab30 R09: 00007f81ecc6aad0 R10: 0000000000180040 R11: 0000000000000293 R12: 0000000000000015 R13: 0000000000180040 R14: 00000000004d39c0 R15: 0000000000000006 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 92e6fa5b2c9f643a ]--- RIP: 0010:shmem_undo_range+0xdaa/0x29a0 mm/shmem.c:815 Code: 00 0f 85 bd 19 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a5 f0 d6 ff 48 c7 c6 e0 32 f1 87 4c 89 e7 e8 16 10 05 00 <0f> 0b e8 8f f0 d6 ff 49 8d 7c 24 20 48 89 f8 48 c1 e8 03 80 3c 18 RSP: 0018:ffff8801ca12eb80 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000011977 RSI: ffffffff81aaab95 RDI: ffffed0039425d60 RBP: ffff8801ca12f2f8 R08: ffff88019db10080 R09: ffffed003b5e4fc0 R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: ffffea000634fac0 R13: ffff8801ca12f2d0 R14: 0000000000000001 R15: 00000000000027ed FS: 00007f81ecc6b700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f26d7509518 CR3: 0000000195d56000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400