------------[ cut here ]------------ current->flags & PF_MEMALLOC WARNING: mm/page_alloc.c:4816 at __alloc_pages_slowpath mm/page_alloc.c:4816 [inline], CPU#2: udevd/16182 WARNING: mm/page_alloc.c:4816 at __alloc_frozen_pages_noprof+0x1eac/0x3300 mm/page_alloc.c:5449, CPU#2: udevd/16182 Modules linked in: CPU: 2 UID: 0 PID: 16182 Comm: udevd Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP 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 mm/page_alloc.c:4816 [inline] RIP: 0010:__alloc_frozen_pages_noprof+0x1eac/0x3300 mm/page_alloc.c:5449 Code: 38 d0 7c 08 84 d2 0f 85 de 12 00 00 65 48 8b 05 82 23 1c 12 c7 84 24 94 00 00 00 00 80 00 00 f6 40 2d 08 0f 84 ba e7 ff ff 90 <0f> 0b 90 e9 b1 e7 ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 RSP: 0018:ffffc900065be328 EFLAGS: 00010202 RAX: ffff888029214b00 RBX: 0000000000000000 RCX: 1ffff1100fffad29 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88803fffd938 RBP: ffff888029214b2c R08: 0000000000008000 R09: 0000000000000001 R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000148c48 R13: ffff88803fffb900 R14: 0000000000000000 R15: 1ffff92000cb7c7f FS: 00007f37f0b96880(0000) GS:ffff888096b68000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f748d2a8 CR3: 000000004e98e000 CR4: 0000000000352ef0 Call Trace: alloc_pages_mpol+0x201/0x550 mm/mempolicy.c:2486 alloc_pages_noprof mm/mempolicy.c:2577 [inline] folio_alloc_noprof+0x22/0x250 mm/mempolicy.c:2587 filemap_alloc_folio_noprof.part.0+0x3db/0x440 mm/filemap.c:1019 filemap_alloc_folio_noprof mm/filemap.c:2033 [inline] __filemap_get_folio_mpol+0x653/0x1320 mm/filemap.c:2018 __filemap_get_folio include/linux/pagemap.h:761 [inline] grow_dev_folio fs/buffer.c:858 [inline] grow_buffers fs/buffer.c:924 [inline] __getblk_slow fs/buffer.c:942 [inline] bdev_getblk+0x246/0x6a0 fs/buffer.c:1346 __getblk include/linux/buffer_head.h:378 [inline] sb_getblk include/linux/buffer_head.h:384 [inline] __ext4_get_inode_loc+0x571/0x1510 fs/ext4/inode.c:4921 ext4_get_inode_loc+0xbd/0x160 fs/ext4/inode.c:5049 ext4_reserve_inode_write+0x145/0x330 fs/ext4/inode.c:6506 __ext4_mark_inode_dirty+0x18f/0x910 fs/ext4/inode.c:6694 ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6731 __mark_inode_dirty+0x1f3/0x16e0 fs/fs-writeback.c:2729 mark_inode_dirty_sync include/linux/fs.h:2211 [inline] sync_lazytime fs/fs-writeback.c:1761 [inline] sync_lazytime+0x39b/0x5d0 fs/fs-writeback.c:1753 iput.part.0+0x207/0x1050 fs/inode.c:2046 iput+0x35/0x40 fs/inode.c:2030 dentry_unlink_inode+0x284/0x470 fs/dcache.c:479 dentry_kill+0x25d/0xc20 fs/dcache.c:826 shrink_kill fs/dcache.c:1275 [inline] shrink_dentry_list+0x1e8/0x310 fs/dcache.c:1292 prune_dcache_sb+0xea/0x150 fs/dcache.c:1374 super_cache_scan+0x361/0x5c0 fs/super.c:238 do_shrink_slab+0x416/0x1200 mm/shrinker.c:443 shrink_slab+0x171/0x12e0 mm/shrinker.c:674 shrink_node_memcgs mm/vmscan.c:6222 [inline] shrink_node+0x812/0x4320 mm/vmscan.c:6264 shrink_zones mm/vmscan.c:6503 [inline] do_try_to_free_pages+0x33e/0x16d0 mm/vmscan.c:6565 try_to_free_pages+0x2a0/0x740 mm/vmscan.c:6804 __perform_reclaim mm/page_alloc.c:4451 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4478 [inline] __alloc_pages_slowpath mm/page_alloc.c:4939 [inline] __alloc_frozen_pages_noprof+0xf8a/0x3300 mm/page_alloc.c:5449 alloc_pages_mpol+0x201/0x550 mm/mempolicy.c:2486 folio_alloc_mpol_noprof+0x36/0x260 mm/mempolicy.c:2505 shmem_alloc_folio+0x135/0x160 mm/shmem.c:1933 shmem_alloc_and_add_folio+0x371/0xd40 mm/shmem.c:1975 shmem_get_folio_gfp+0x75b/0x1980 mm/shmem.c:2528 shmem_get_folio mm/shmem.c:2634 [inline] shmem_write_begin+0x1a4/0x420 mm/shmem.c:3265 generic_perform_write+0x292/0xa40 mm/filemap.c:4374 shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3440 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6af/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x121/0x770 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f37f04a7407 Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP: 002b:00007ffc7452f1f0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f37f0b96880 RCX: 00007f37f04a7407 RDX: 0000000000000020 RSI: 000055a5bbe6d550 RDI: 0000000000000009 RBP: 000055a5bbe6d550 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000020 R13: 000055a5bbe698a0 R14: 00007f37f05efea0 R15: 000055a58241c9dd