syzbot

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current->flags & PF_MEMALLOC
WARNING: fs/gfs2/super.c:1254 at evict_should_delete fs/gfs2/super.c:1254 [inline], CPU#0: kswapd0/76
WARNING: fs/gfs2/super.c:1254 at gfs2_evict_inode+0x123f/0x1400 fs/gfs2/super.c:1466, CPU#0: kswapd0/76
Modules linked in:
CPU: 0 UID: 0 PID: 76 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:evict_should_delete fs/gfs2/super.c:1254 [inline]
RIP: 0010:gfs2_evict_inode+0x123f/0x1400 fs/gfs2/super.c:1466
Code: 47 56 f8 ff 45 31 f6 49 bd 00 00 00 00 00 fc ff df 4c 8d 7b 28 e9 02 f7 ff ff e8 2c cf 95 fd e9 91 fe ff ff e8 22 cf 95 fd 90 <0f> 0b 90 e9 a9 f3 ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 15
RSP: 0018:ffffc90000cef0c0 EFLAGS: 00010293
RAX: ffffffff8430a2ee RBX: ffff8880129d0cc0 RCX: ffff888000a6a540
RDX: 0000000000000000 RSI: 0000000000000800 RDI: 0000000000000000
RBP: ffffc90000cef1f0 R08: ffff8880524692c7 R09: 1ffff1100a48d258
R10: dffffc0000000000 R11: ffffed100a48d259 R12: ffff888000a6a56c
R13: 1ffff1100253a1a1 R14: ffff88805b3a0668 R15: 0000000000000800
FS:  0000000000000000(0000) GS:ffff88808c815000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb7980769a0 CR3: 000000000e746000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 evict+0x624/0xb50 fs/inode.c:825
 dispose_list fs/inode.c:867 [inline]
 prune_icache_sb+0x223/0x2d0 fs/inode.c:1014
 super_cache_scan+0x38d/0x4a0 fs/super.c:225
 do_shrink_slab+0x6d0/0x10e0 mm/shrinker.c:434
 shrink_slab_memcg mm/shrinker.c:551 [inline]
 shrink_slab+0x838/0x1220 mm/shrinker.c:629
 shrink_one+0x2a2/0x730 mm/vmscan.c:5026
 shrink_many mm/vmscan.c:5087 [inline]
 lru_gen_shrink_node mm/vmscan.c:5165 [inline]
 shrink_node+0x3303/0x3b60 mm/vmscan.c:6154
 kswapd_shrink_node mm/vmscan.c:7008 [inline]
 balance_pgdat mm/vmscan.c:7186 [inline]
 kswapd+0x17b6/0x31c0 mm/vmscan.c:7462
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>