syzbot

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current->flags & PF_MEMALLOC
WARNING: mm/page_alloc.c:4741 at __alloc_pages_slowpath+0xd0a/0xd40 mm/page_alloc.c:4741, CPU#0: kswapd0/70
Modules linked in:
CPU: 0 UID: 0 PID: 70 Comm: kswapd0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__alloc_pages_slowpath+0xd0a/0xd40 mm/page_alloc.c:4741
Code: 48 8b 1d 31 3b f9 10 48 83 c3 2c 48 89 d8 48 c1 e8 03 0f b6 04 08 84 c0 75 23 f6 43 01 08 48 8b 54 24 08 0f 84 41 f3 ff ff 90 <0f> 0b 90 e9 38 f3 ff ff e8 59 7c 8c 09 90 0f 0b 90 eb c2 89 d9 80
RSP: 0018:ffffc90000b1ec98 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff888000e3c9ac RCX: dffffc0000000000
RDX: ffffc90000b1edc0 RSI: 0000000000000000 RDI: 00000000000cacc0
RBP: 00000000000cacc0 R08: ffff88802fffd9b0 R09: 1ffff1100bffae52
R10: dffffc0000000000 R11: ffffed100bffae53 R12: ffffc90000b1edc0
R13: 1ffff92000163db4 R14: 00000000000cacc0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88808ca56000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc9045ff000 CR3: 00000000121ca000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __alloc_frozen_pages_noprof+0x322/0x380 mm/page_alloc.c:5263
 alloc_slab_page mm/slub.c:3296 [inline]
 allocate_slab+0x11f/0x660 mm/slub.c:3493
 new_slab mm/slub.c:3543 [inline]
 refill_objects+0x331/0x3c0 mm/slub.c:7178
 __pcs_replace_empty_main+0x2f9/0x5e0 mm/slub.c:-1
 alloc_from_pcs mm/slub.c:4720 [inline]
 slab_alloc_node mm/slub.c:4854 [inline]
 kmem_cache_alloc_noprof+0x37d/0x650 mm/slub.c:4876
 __xfs_trans_alloc+0x26/0x410 fs/xfs/xfs_trans.c:220
 xfs_trans_alloc+0xd7/0x9b0 fs/xfs/xfs_trans.c:254
 xfs_vn_sync_lazytime+0xaf/0x150 fs/xfs/xfs_iops.c:1238
 sync_lazytime+0x12d/0x2d0 fs/fs-writeback.c:1721
 iput+0x230/0xe80 fs/inode.c:1997
 __dentry_kill+0x1a2/0x5e0 fs/dcache.c:670
 shrink_kill+0xa9/0x2c0 fs/dcache.c:1147
 shrink_dentry_list+0x2e0/0x5e0 fs/dcache.c:1174
 prune_dcache_sb+0x119/0x180 fs/dcache.c:1256
 super_cache_scan+0x369/0x4b0 fs/super.c:223
 do_shrink_slab+0x6df/0x1170 mm/shrinker.c:437
 shrink_slab_memcg mm/shrinker.c:550 [inline]
 shrink_slab+0x830/0x1150 mm/shrinker.c:628
 shrink_one+0x2d9/0x710 mm/vmscan.c:4928
 shrink_many mm/vmscan.c:4989 [inline]
 lru_gen_shrink_node mm/vmscan.c:5067 [inline]
 shrink_node+0x3197/0x3a90 mm/vmscan.c:6047
 kswapd_shrink_node mm/vmscan.c:6894 [inline]
 balance_pgdat mm/vmscan.c:7070 [inline]
 kswapd+0x1742/0x2e10 mm/vmscan.c:7343
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>