------------[ cut here ]------------
WARNING: CPU: 1 PID: 3921 at fs/ext4/inode.c:3264 ext4_invalidatepage+0x109/0x3a0 fs/ext4/inode.c:3264
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3921 Comm: syz-executor1 Not tainted 4.9.128+ #41
 ffff8801a9e174e8 ffffffff81af2469 ffffffff82838ba0 00000000ffffffff
 0000000000000000 0000000000000001 0000000000000cc0 ffff8801a9e175a8
 ffffffff813df985 0000000041b58ab3 ffffffff82c2896b ffffffff813df7c6
Call Trace:
 [<ffffffff81af2469>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81af2469>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813df985>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813dfc54>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff810d973c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff816962a9>] ext4_invalidatepage+0x109/0x3a0 fs/ext4/inode.c:3264
 [<ffffffff81426b05>] do_invalidatepage mm/truncate.c:99 [inline]
 [<ffffffff81426b05>] truncate_complete_page mm/truncate.c:119 [inline]
 [<ffffffff81426b05>] truncate_inode_page+0x125/0x260 mm/truncate.c:167
 [<ffffffff81426fae>] truncate_inode_pages_range+0x2be/0x1060 mm/truncate.c:291
 [<ffffffff81427e96>] truncate_inode_pages mm/truncate.c:401 [inline]
 [<ffffffff81427e96>] truncate_pagecache+0x66/0x90 mm/truncate.c:706
 [<ffffffff816bbaaf>] ext4_setattr+0x14ef/0x2170 fs/ext4/inode.c:5301
 [<ffffffff81547d67>] notify_change2+0xad7/0xe00 fs/attr.c:313
 [<ffffffff814e3d9d>] do_truncate2+0x13d/0x1f0 fs/open.c:63
 [<ffffffff8151d426>] handle_truncate fs/namei.c:2990 [inline]
 [<ffffffff8151d426>] do_last fs/namei.c:3419 [inline]
 [<ffffffff8151d426>] path_openat+0xb86/0x2790 fs/namei.c:3534
 [<ffffffff81521eb7>] do_filp_open+0x197/0x270 fs/namei.c:3568
 [<ffffffff814e6b8d>] do_sys_open+0x30d/0x5c0 fs/open.c:1072
 [<ffffffff814e6ee7>] SYSC_open fs/open.c:1090 [inline]
 [<ffffffff814e6ee7>] SyS_open fs/open.c:1085 [inline]
 [<ffffffff814e6ee7>] SYSC_creat fs/open.c:1110 [inline]
 [<ffffffff814e6ee7>] SyS_creat+0x27/0x30 fs/open.c:1108
 [<ffffffff8100554f>] do_syscall_64+0x19f/0x480 arch/x86/entry/common.c:282
 [<ffffffff8278df13>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..