------------[ cut here ]------------ current->flags & PF_MEMALLOC WARNING: mm/page_alloc.c:4817 at __alloc_pages_slowpath mm/page_alloc.c:4817 [inline], CPU#1: syz-executor/10914 WARNING: mm/page_alloc.c:4817 at __alloc_frozen_pages_noprof+0x1d7e/0x31e0 mm/page_alloc.c:5477, CPU#1: syz-executor/10914 Modules linked in: CPU: 1 UID: 0 PID: 10914 Comm: syz-executor 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:4817 [inline] RIP: 0010:__alloc_frozen_pages_noprof+0x1d7e/0x31e0 mm/page_alloc.c:5477 Code: 38 d0 7c 08 84 d2 0f 85 02 14 00 00 65 48 8b 05 70 7a 41 13 c7 84 24 90 00 00 00 00 80 00 00 f6 40 2d 08 0f 84 6a e7 ff ff 90 <0f> 0b 90 e9 61 e7 ff ff 8b bc 24 90 00 00 00 85 ff 0f 85 90 07 00 RSP: 0018:ffffc90002d66248 EFLAGS: 00010202 RAX: ffff8880282da580 RBX: 0000000000000000 RCX: 1ffff1100fffad69 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88803fffd938 RBP: 0000000000000000 R08: 0000000000008000 R09: 0000000000003db7 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880282da5ac R13: 1ffff920005acc63 R14: 0000000000048c40 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888095379000(0063) knlGS:0000000057ea4480 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000ffba5544 CR3: 00000000576d6000 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:1017 filemap_alloc_folio_noprof mm/filemap.c:2062 [inline] __filemap_get_folio_mpol+0x64e/0x11d0 mm/filemap.c:2047 __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_one+0x3d3/0x870 mm/vmscan.c:5320 shrink_many mm/vmscan.c:5381 [inline] lru_gen_shrink_node mm/vmscan.c:5459 [inline] shrink_node+0x2a61/0x4410 mm/vmscan.c:6465 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:4441 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4464 [inline] __alloc_pages_slowpath mm/page_alloc.c:4959 [inline] __alloc_frozen_pages_noprof+0x11b6/0x31e0 mm/page_alloc.c:5477 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_cluster_readahead+0x369/0x5d0 mm/swap_state.c:913 swapin_readahead+0xf0/0x260 mm/swap_state.c:1061 do_swap_page+0xf98/0x54a0 mm/memory.c:5083 handle_pte_fault mm/memory.c:6668 [inline] __handle_mm_fault+0x190a/0x2f40 mm/memory.c:6817 handle_mm_fault+0x363/0xa30 mm/memory.c:6984 do_user_addr_fault+0x745/0x12f0 arch/x86/mm/fault.c:1394 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: 0010:copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] RIP: 0010:raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline] RIP: 0010:_inline_copy_to_user include/linux/uaccess.h:202 [inline] RIP: 0010:_copy_to_user+0x9f/0xd0 lib/usercopy.c:24 Code: 89 ee 48 89 ef e8 01 38 d4 fc 4d 85 ff 75 26 e8 17 3e d4 fc 89 de 4c 89 e7 e8 dd b5 4d fd 0f 01 cb 48 89 d9 48 89 ef 4c 89 e6 a4 0f 1f 00 0f 01 ca 48 89 cb e8 f1 3d d4 fc 48 89 d8 5b 5d 41 RSP: 0018:ffffc90002d67dd0 EFLAGS: 00050246 RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000000008 RDX: 0000000000000001 RSI: ffffc90002d67e38 RDI: 00000000ffba5544 RBP: 00000000ffba5544 R08: 0000000000000000 R09: fffff520005acfc7 R10: ffffc90002d67e3f R11: 0000000000000000 R12: ffffc90002d67e38 R13: 00000000ffba554c R14: 00007ffffffff000 R15: 0000000000000000 copy_to_user include/linux/uaccess.h:230 [inline] put_compat_sigset include/linux/compat.h:469 [inline] __do_compat_sys_rt_sigprocmask kernel/signal.c:3454 [inline] __se_compat_sys_rt_sigprocmask kernel/signal.c:3434 [inline] __ia32_compat_sys_rt_sigprocmask+0x326/0x460 kernel/signal.c:3434 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] __do_fast_syscall_32+0x14d/0x8e0 arch/x86/entry/syscall_32.c:286 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:311 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7ff7fbc Code: d2 74 05 c1 e8 0c 89 02 8b 5d fc 31 c0 c9 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 2e 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 58 b8 RSP: 002b:00000000ffba5500 EFLAGS: 00000246 ORIG_RAX: 00000000000000af RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000f72d87d0 RDX: 00000000ffba5544 RSI: 0000000000000008 RDI: 00000000f747eff4 RBP: 00000000ffba5544 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 89 ee mov %ebp,%esi 2: 48 89 ef mov %rbp,%rdi 5: e8 01 38 d4 fc call 0xfcd4380b a: 4d 85 ff test %r15,%r15 d: 75 26 jne 0x35 f: e8 17 3e d4 fc call 0xfcd43e2b 14: 89 de mov %ebx,%esi 16: 4c 89 e7 mov %r12,%rdi 19: e8 dd b5 4d fd call 0xfd4db5fb 1e: 0f 01 cb stac 21: 48 89 d9 mov %rbx,%rcx 24: 48 89 ef mov %rbp,%rdi 27: 4c 89 e6 mov %r12,%rsi * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: 0f 1f 00 nopl (%rax) 2f: 0f 01 ca clac 32: 48 89 cb mov %rcx,%rbx 35: e8 f1 3d d4 fc call 0xfcd43e2b 3a: 48 89 d8 mov %rbx,%rax 3d: 5b pop %rbx 3e: 5d pop %rbp 3f: 41 rex.B