BUG: Bad page state in process syz-executor.2 pfn:103348 page:00000000220b049a refcount:-1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103348 flags: 0x2fffc0000000000() raw: 02fffc0000000000 dead000000000100 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 ffffffffffffffff 0000000000000000 page dumped because: nonzero _refcount Modules linked in: CPU: 0 PID: 8305 Comm: syz-executor.2 Not tainted 5.9.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xbb/0xe3 lib/dump_stack.c:118 bad_page.cold+0x65/0x96 mm/page_alloc.c:636 check_new_page mm/page_alloc.c:2148 [inline] check_new_pages mm/page_alloc.c:2201 [inline] rmqueue mm/page_alloc.c:3404 [inline] get_page_from_freelist+0x4b2/0x1c50 mm/page_alloc.c:3841 __alloc_pages_nodemask+0x17b/0x330 mm/page_alloc.c:4895 alloc_pages_current+0x8b/0x150 mm/mempolicy.c:2275 alloc_pages include/linux/gfp.h:545 [inline] skb_page_frag_refill net/core/sock.c:2479 [inline] skb_page_frag_refill+0xb7/0x170 net/core/sock.c:2463 sk_page_frag_refill+0x22/0x90 net/core/sock.c:2499 kcm_sendmsg+0x33b/0xa60 net/kcm/kcmsock.c:959 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0x4c/0x60 net/socket.c:671 ____sys_sendmsg+0x118/0x2f0 net/socket.c:2353 ___sys_sendmsg+0x81/0xc0 net/socket.c:2407 __sys_sendmmsg+0xda/0x230 net/socket.c:2497 __do_sys_sendmmsg net/socket.c:2526 [inline] __se_sys_sendmmsg net/socket.c:2523 [inline] __x64_sys_sendmmsg+0x24/0x30 net/socket.c:2523 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cba9 Code: 8d b6 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2cda097c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00000000004fd7a0 RCX: 000000000045cba9 RDX: 0000000000000002 RSI: 0000000020001840 RDI: 0000000000000004 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000004008012 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000903 R14: 00000000004cbe93 R15: 00007f2cda0986d4