syzkaller login: [ 32.066718] BUG: Bad rss-counter state mm:00000000a38f4a8b type:MM_FILEPAGES val:33 [ 32.067966] BUG: Bad rss-counter state mm:00000000a38f4a8b type:MM_ANONPAGES val:22 [ 32.210836] ================================================================== [ 32.211801] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.212770] Read of size 8 at addr ffff88800db373f8 by task sshd/220 [ 32.213560] [ 32.213788] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.214739] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.215766] Call Trace: [ 32.216095] [ 32.216406] dump_stack_lvl+0x91/0xf0 [ 32.216912] print_report+0xcc/0x620 [ 32.217413] ? __virt_addr_valid+0x102/0x340 [ 32.217983] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.218623] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.219268] kasan_report+0xbe/0xf0 [ 32.219760] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.220409] vma_interval_tree_remove+0xc75/0xec0 [ 32.221039] vma_prepare+0xc54/0x11a0 [ 32.221533] __split_vma+0x5af/0x950 [ 32.222022] ? __pfx___split_vma+0x10/0x10 [ 32.222567] ? find_held_lock+0x2c/0x110 [ 32.223108] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.223712] ? lock_is_held_type+0x9f/0x120 [ 32.224266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.224893] ? mtree_range_walk+0x632/0x900 [ 32.225462] ? mas_walk+0x5c7/0x7c0 [ 32.225949] do_vmi_munmap+0x1f1/0x2b0 [ 32.226459] mmap_region+0x1f9/0x2660 [ 32.226963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.227519] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.228254] ? __pfx_lock_acquire+0x10/0x10 [ 32.228815] ? __pfx_mmap_region+0x10/0x10 [ 32.229361] ? security_mmap_addr+0x7d/0xa0 [ 32.229914] ? get_unmapped_area+0x1f5/0x3f0 [ 32.230481] do_mmap+0x854/0xf00 [ 32.230937] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.231458] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.232045] ksys_mmap_pgoff+0x3af/0x500 [ 32.232578] do_syscall_64+0x3f/0x90 [ 32.233081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.233747] RIP: 0033:0x7f4620421d82 [ 32.234218] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 32.236465] RSP: 002b:00007fff9e3655a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.237407] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4620421d82 [ 32.238296] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f461f85b000 [ 32.239178] RBP: 00007f461f85b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.240039] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ae5171ec0 [ 32.240903] R13: 00007fff9e3655c0 R14: 00007fff9e3655f0 R15: 00007fff9e365950 [ 32.241791] [ 32.242082] [ 32.242300] Allocated by task 213: [ 32.242733] kasan_save_stack+0x22/0x50 [ 32.243240] kasan_set_track+0x25/0x30 [ 32.243760] __kasan_slab_alloc+0x59/0x70 [ 32.244290] kmem_cache_alloc+0x16b/0x370 [ 32.244814] vm_area_dup+0x20/0x160 [ 32.245281] __split_vma+0x170/0x950 [ 32.245758] split_vma+0xc6/0x110 [ 32.246203] mprotect_fixup+0x8d2/0xb30 [ 32.246711] do_mprotect_pkey+0x87e/0xd40 [ 32.247237] __x64_sys_mprotect+0x78/0xc0 [ 32.247782] do_syscall_64+0x3f/0x90 [ 32.248262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.248923] [ 32.249143] Freed by task 213: [ 32.249539] kasan_save_stack+0x22/0x50 [ 32.250054] kasan_set_track+0x25/0x30 [ 32.250553] kasan_save_free_info+0x2b/0x50 [ 32.251088] __kasan_slab_free+0x10a/0x190 [ 32.251629] kmem_cache_free+0x10d/0x4d0 [ 32.252142] rcu_core+0x8c8/0x2860 [ 32.252590] __do_softirq+0x1b7/0x7d4 [ 32.253069] [ 32.253287] Last potentially related work creation: [ 32.253877] kasan_save_stack+0x22/0x50 [ 32.254394] __kasan_record_aux_stack+0x8e/0xa0 [ 32.254973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.255635] remove_vma+0x139/0x170 [ 32.256087] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.256653] do_vmi_munmap+0x1f1/0x2b0 [ 32.257137] __vm_munmap+0x138/0x3a0 [ 32.257614] __x64_sys_munmap+0x59/0x80 [ 32.258110] do_syscall_64+0x3f/0x90 [ 32.258598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.259246] [ 32.259474] The buggy address belongs to the object at ffff88800db373a0 [ 32.259474] which belongs to the cache vm_area_struct of size 168 [ 32.260945] The buggy address is located 88 bytes inside of [ 32.260945] freed 168-byte region [ffff88800db373a0, ffff88800db37448) [ 32.262387] [ 32.262614] The buggy address belongs to the physical page: [ 32.263290] page:00000000febf0313 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb37 [ 32.264381] memcg:ffff88800ed9e901 [ 32.264811] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.265473] page_type: 0xffffffff() [ 32.265934] raw: 0100000000000200 ffff88800879fc80 ffffea0000361c00 dead000000000002 [ 32.266862] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed9e901 [ 32.267802] page dumped because: kasan: bad access detected [ 32.268469] [ 32.268686] Memory state around the buggy address: [ 32.269282] ffff88800db37280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.270140] ffff88800db37300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.271005] >ffff88800db37380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.271870] ^ [ 32.272715] ffff88800db37400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.273578] ffff88800db37480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.274448] ================================================================== [ 32.275941] Disabling lock debugging due to kernel taint [ 34.144030] BUG: Bad rss-counter state mm:00000000d9b420d7 type:MM_FILEPAGES val:33 [ 34.144762] BUG: Bad rss-counter state mm:00000000d9b420d7 type:MM_ANONPAGES val:22 [ 34.631674] BUG: Bad rss-counter state mm:000000008f40b301 type:MM_FILEPAGES val:33 [ 34.632852] BUG: Bad rss-counter state mm:000000008f40b301 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34126' (ECDSA) to the list of known hosts. 2023/06/20 03:24:15 fuzzer started 2023/06/20 03:24:16 dialing manager at localhost:44161 2023/06/20 03:24:16 checking machine... 2023/06/20 03:24:16 checking revisions... [ 35.331135] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:24:16 testing simple program... [ 35.368536] cgroup: Unknown subsys name 'net' [ 35.415231] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:24:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800e77f868 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000216 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f478bc84900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f478c239650 CR3=0000000010044000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fe133f9ae40 CR3=0000000009a52000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=036f5eae1339a79dff4ff643e95d5da7 XMM02=eff9b2d0a8fce9cb000000000011dd10 XMM03=2c67c8bc2e329bc3000000000011de38 XMM04=f2456e68597872ff00000000000ae988 XMM05=e5876b1419f7c38600000000001358c8 XMM06=4fda316b135da52b00000000001346b8 XMM07=fb795ef6d65770560000000000124c18 XMM08=2c67c8bc2e329bc3000000000011de38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000