BUG: Bad page state in process syz-executor3  pfn:1d9873
page:ffffea0007661cc0 count:1 mapcount:1 mapping:          (null) index:0x0
flags: 0x2fffc0000000004(referenced)
raw: 02fffc0000000004 0000000000000000 0000000000000000 0000000100000000
raw: dead000000000100 dead000000000200 0000000000000000 0000000000000000
page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
Modules linked in:
CPU: 0 PID: 17481 Comm: syz-executor3 Not tainted 4.15.0-rc6+ #251
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 bad_page+0x230/0x2b0 mm/page_alloc.c:577
 free_pages_check_bad+0x1f0/0x2e0 mm/page_alloc.c:955
 free_pages_check mm/page_alloc.c:964 [inline]
 free_pages_prepare mm/page_alloc.c:1054 [inline]
 free_pcp_prepare mm/page_alloc.c:1079 [inline]
 free_unref_page_prepare mm/page_alloc.c:2622 [inline]
 free_unref_page+0x594/0x9e0 mm/page_alloc.c:2672
 __free_pages+0x107/0x150 mm/page_alloc.c:4297
 free_pages+0x51/0x90 mm/page_alloc.c:4309
 mon_free_buff drivers/usb/mon/mon_bin.c:1331 [inline]
 mon_bin_ioctl+0x653/0xd40 drivers/usb/mon/mon_bin.c:1039
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007fdbf784fc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452ac9
RDX: 000000000000f0b1 RSI: 0000000000009204 RDI: 0000000000000013
RBP: 000000000000027a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f1c10
R13: 00000000ffffffff R14: 00007fdbf78506d4 R15: 0000000000000002
dccp_invalid_packet: P.CsCov 9 exceeds packet length 28
dccp_invalid_packet: P.CsCov 9 exceeds packet length 28
dccp_invalid_packet: P.CsCov 9 exceeds packet length 28
dccp_invalid_packet: P.CsCov 9 exceeds packet length 28
dccp_invalid_packet: P.CsCov 9 exceeds packet length 28
dccp_invalid_packet: P.CsCov 9 exceeds packet length 28
dccp_invalid_packet: P.CsCov 9 exceeds packet length 28
dccp_invalid_packet: P.CsCov 9 exceeds packet length 28
dccp_invalid_packet: P.CsCov 9 exceeds packet length 28
dccp_invalid_packet: P.CsCov 9 exceeds packet length 28
device eql entered promiscuous mode