------------[ cut here ]------------ current->flags & PF_MEMALLOC WARNING: mm/page_alloc.c:4816 at __alloc_pages_slowpath mm/page_alloc.c:4816 [inline], CPU#3: syz.9.2118/12593 WARNING: mm/page_alloc.c:4816 at __alloc_frozen_pages_noprof+0x1eac/0x3300 mm/page_alloc.c:5449, CPU#3: syz.9.2118/12593 Modules linked in: CPU: 3 UID: 0 PID: 12593 Comm: syz.9.2118 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 22 63 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: 0000:ffffc90024ebd5a8 EFLAGS: 00010202 RAX: ffff8880518d0000 RBX: 0000000000000000 RCX: 1ffff1100fffad29 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88803fffd938 RBP: ffff8880518d002c R08: 0000000000008000 R09: 0000000000000001 R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000148c48 R13: ffff88803fffb900 R14: 0000000000000000 R15: 1ffff920049d7acf FS: 0000000000000000(0000) GS:ffff888096c63000(0063) knlGS:00000000f53e5b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00005622f0f4eb20 CR3: 000000004b480000 CR4: 0000000000352ef0 DR0: 0000000000000007 DR1: 0000000000000001 DR2: 0000000000000002 DR3: 000004000000bdf0 DR6: 00000000ffff0ff0 DR7: 0000000000000400 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_one+0x398/0x850 mm/vmscan.c:5119 shrink_many mm/vmscan.c:5180 [inline] lru_gen_shrink_node mm/vmscan.c:5258 [inline] shrink_node+0x2b20/0x4320 mm/vmscan.c:6247 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 __kernel_write_iter+0x2ac/0x930 fs/read_write.c:621 dump_emit_page fs/coredump.c:1293 [inline] dump_user_range+0x3f9/0xad0 fs/coredump.c:1367 elf_core_dump+0x31f8/0x42f0 fs/binfmt_elf.c:2106 coredump_write fs/coredump.c:1047 [inline] do_coredump fs/coredump.c:1126 [inline] vfs_coredump+0x281a/0x54a0 fs/coredump.c:1195 get_signal+0x1f2a/0x21e0 kernel/signal.c:3024 arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop kernel/entry/common.c:101 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline] irqentry_exit+0x402/0xa10 kernel/entry/common.c:165 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0023:0xf7f47fec Code: Unable to access opcode bytes at 0xf7f47fc2. RSP: 002b:0000000000000040 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000064144000 RCX: 0000000000000040 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000f53e55ec R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000