------------[ cut here ]------------ current->flags & PF_MEMALLOC WARNING: mm/page_alloc.c:4800 at __alloc_pages_slowpath mm/page_alloc.c:4800 [inline], CPU#3: syz.1.5485/28070 WARNING: mm/page_alloc.c:4800 at __alloc_frozen_pages_noprof+0x1d63/0x3280 mm/page_alloc.c:5457, CPU#3: syz.1.5485/28070 Modules linked in: CPU: 3 UID: 0 PID: 28070 Comm: syz.1.5485 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:4800 [inline] RIP: 0010:__alloc_frozen_pages_noprof+0x1d63/0x3280 mm/page_alloc.c:5457 Code: 38 d0 7c 08 84 d2 0f 85 ae 12 00 00 65 48 8b 05 eb 3d 41 13 c7 84 24 94 00 00 00 00 80 00 00 f6 40 2d 08 0f 84 6b e7 ff ff 90 <0f> 0b 90 e9 62 e7 ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 RSP: 0000:ffffc9000052e4d8 EFLAGS: 00010202 RAX: ffff88805a114b00 RBX: 0000000000000000 RCX: 1ffff1100fffad69 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88803fffd938 RBP: 0000000000008000 R08: 0000000000000001 R09: 000000000000257d R10: 0000000000000000 R11: 0000000000048c40 R12: ffff88805a114b2c R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff920000a5cb5 FS: 0000000000000000(0000) GS:ffff88809557e000(0063) knlGS:00000000569f8480 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f73f3e18 CR3: 0000000059f2d000 CR4: 0000000000352ef0 Call Trace: alloc_pages_mpol+0x201/0x560 mm/mempolicy.c:2511 alloc_pages_noprof mm/mempolicy.c:2602 [inline] folio_alloc_noprof+0x22/0x250 mm/mempolicy.c:2612 filemap_alloc_folio_noprof.part.0+0x3db/0x440 mm/filemap.c:1018 filemap_alloc_folio_noprof mm/filemap.c:2051 [inline] __filemap_get_folio_mpol+0x64e/0x1230 mm/filemap.c:2036 __filemap_get_folio include/linux/pagemap.h:758 [inline] ext4_mb_load_buddy_gfp+0x708/0x1b20 fs/ext4/mballoc.c:1730 ext4_discard_preallocations+0x584/0x10c0 fs/ext4/mballoc.c:5684 ext4_clear_inode+0x6e/0x280 fs/ext4/super.c:1574 ext4_evict_inode+0x1de/0x1890 fs/ext4/inode.c:400 evict+0x3c2/0xad0 fs/inode.c:821 dispose_list+0x117/0x1e0 fs/inode.c:863 prune_icache_sb+0xea/0x150 fs/inode.c:1021 super_cache_scan+0x37c/0x560 fs/super.c:227 do_shrink_slab+0x411/0x1200 mm/shrinker.c:452 shrink_slab_memcg mm/shrinker.c:569 [inline] shrink_slab+0xa78/0x12d0 mm/shrinker.c:647 shrink_node_memcgs mm/vmscan.c:6440 [inline] shrink_node+0x7c1/0x4410 mm/vmscan.c:6482 shrink_zones mm/vmscan.c:6701 [inline] do_try_to_free_pages+0x2da/0x1500 mm/vmscan.c:6763 try_to_free_pages+0x2a0/0x740 mm/vmscan.c:7002 __perform_reclaim mm/page_alloc.c:4436 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4459 [inline] __alloc_pages_slowpath mm/page_alloc.c:4939 [inline] __alloc_frozen_pages_noprof+0x1119/0x3280 mm/page_alloc.c:5457 alloc_pages_mpol+0x201/0x560 mm/mempolicy.c:2511 folio_alloc_mpol_noprof+0x36/0x260 mm/mempolicy.c:2530 __swap_cache_alloc mm/swap_state.c:458 [inline] __swap_cache_alloc_folio+0x3d7/0xc50 mm/swap_state.c:550 swap_cache_read_folio+0x47/0x150 mm/swap_state.c:714 swap_cache_read_folio_sync mm/swap_state.c:800 [inline] swap_cluster_readahead+0x477/0x5d0 mm/swap_state.c:922 swapin_readahead+0xf0/0x260 mm/swap_state.c:1061 do_swap_page+0xf95/0x53c0 mm/memory.c:5040 handle_pte_fault mm/memory.c:6630 [inline] __handle_mm_fault+0x15bd/0x2f60 mm/memory.c:6776 handle_mm_fault+0x363/0xa20 mm/memory.c:6943 do_user_addr_fault+0x59c/0x12f0 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0023:0xf7086b24 Code: 82 61 17 00 00 8b 85 b0 fe ff ff 8b 8d dc fe ff ff 8b b5 68 fe ff ff 8b bd 6c fe ff ff 69 c0 84 00 00 00 8d 84 01 ac 8f ee ff <8b> 58 18 8b 50 1c 89 f8 39 de 19 d0 73 2a 8b b9 a0 65 b6 00 8b 81 RSP: 002b:00000000ffdb16a0 EFLAGS: 00010206 RAX: 00000000f73f3e00 RBX: 0000000000001c98 RCX: 00000000f741eff4 RDX: 00000000ffffffff RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000ffdb18e8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 00 00 add %al,(%rax) 2: 8b 85 b0 fe ff ff mov -0x150(%rbp),%eax 8: 8b 8d dc fe ff ff mov -0x124(%rbp),%ecx e: 8b b5 68 fe ff ff mov -0x198(%rbp),%esi 14: 8b bd 6c fe ff ff mov -0x194(%rbp),%edi 1a: 69 c0 84 00 00 00 imul $0x84,%eax,%eax 20: 8d 84 01 ac 8f ee ff lea -0x117054(%rcx,%rax,1),%eax * 27: 8b 58 18 mov 0x18(%rax),%ebx <-- trapping instruction 2a: 8b 50 1c mov 0x1c(%rax),%edx 2d: 89 f8 mov %edi,%eax 2f: 39 de cmp %ebx,%esi 31: 19 d0 sbb %edx,%eax 33: 73 2a jae 0x5f 35: 8b b9 a0 65 b6 00 mov 0xb665a0(%rcx),%edi 3b: 8b .byte 0x8b 3c: 81 .byte 0x81