syzkaller login: [ 32.264693] BUG: Bad rss-counter state mm:0000000098eca69c type:MM_FILEPAGES val:33 [ 32.266218] BUG: Bad rss-counter state mm:0000000098eca69c type:MM_ANONPAGES val:22 [ 32.434353] ================================================================== [ 32.435412] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.436521] Read of size 8 at addr ffff888009505c20 by task sshd/218 [ 32.437669] [ 32.437929] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.438958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.440145] Call Trace: [ 32.440527] [ 32.440894] dump_stack_lvl+0x91/0xf0 [ 32.441460] print_report+0xcc/0x620 [ 32.441948] ? __virt_addr_valid+0x102/0x340 [ 32.442507] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.443128] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.443742] kasan_report+0xbe/0xf0 [ 32.444219] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.444860] vma_interval_tree_remove+0xc75/0xec0 [ 32.445456] vma_prepare+0xc54/0x11a0 [ 32.445933] __split_vma+0x5af/0x950 [ 32.446405] ? __pfx___split_vma+0x10/0x10 [ 32.446927] ? find_held_lock+0x2c/0x110 [ 32.447447] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.448010] ? lock_is_held_type+0x9f/0x120 [ 32.448544] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.449157] ? mtree_range_walk+0x632/0x900 [ 32.449705] ? mas_walk+0x5c7/0x7c0 [ 32.450192] do_vmi_munmap+0x1f1/0x2b0 [ 32.450689] mmap_region+0x1f9/0x2660 [ 32.451178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.451689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.452392] ? __pfx_lock_acquire+0x10/0x10 [ 32.452944] ? __pfx_mmap_region+0x10/0x10 [ 32.453473] ? security_mmap_addr+0x7d/0xa0 [ 32.454000] ? get_unmapped_area+0x1f5/0x3f0 [ 32.454546] do_mmap+0x854/0xf00 [ 32.454982] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.455471] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.456032] ksys_mmap_pgoff+0x3af/0x500 [ 32.456550] do_syscall_64+0x3f/0x90 [ 32.457045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.457692] RIP: 0033:0x7feec82ded82 [ 32.458150] 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 [ 32.460263] RSP: 002b:00007fff4bb6c8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.461184] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feec82ded82 [ 32.462048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feec7718000 [ 32.462910] RBP: 00007feec7718000 R08: 0000000000000009 R09: 0000000000001000 [ 32.463749] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641bd642980 [ 32.464587] R13: 00007fff4bb6c900 R14: 00007fff4bb6c930 R15: 00007fff4bb6cc90 [ 32.465446] [ 32.465737] [ 32.465953] Allocated by task 211: [ 32.466374] kasan_save_stack+0x22/0x50 [ 32.466872] kasan_set_track+0x25/0x30 [ 32.467367] __kasan_slab_alloc+0x59/0x70 [ 32.467891] kmem_cache_alloc+0x16b/0x370 [ 32.468410] vm_area_dup+0x20/0x160 [ 32.468868] __split_vma+0x170/0x950 [ 32.469337] split_vma+0xc6/0x110 [ 32.469771] mprotect_fixup+0x8d2/0xb30 [ 32.470270] do_mprotect_pkey+0x87e/0xd40 [ 32.470784] __x64_sys_mprotect+0x78/0xc0 [ 32.471302] do_syscall_64+0x3f/0x90 [ 32.471774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.472417] [ 32.472651] Freed by task 202: [ 32.473047] kasan_save_stack+0x22/0x50 [ 32.473547] kasan_set_track+0x25/0x30 [ 32.474039] kasan_save_free_info+0x2b/0x50 [ 32.474569] __kasan_slab_free+0x10a/0x190 [ 32.475097] kmem_cache_free+0x10d/0x4d0 [ 32.475605] rcu_core+0x8c8/0x2860 [ 32.476045] __do_softirq+0x1b7/0x7d4 [ 32.476515] [ 32.476743] Last potentially related work creation: [ 32.477334] kasan_save_stack+0x22/0x50 [ 32.477832] __kasan_record_aux_stack+0x8e/0xa0 [ 32.478466] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.479109] remove_vma+0x139/0x170 [ 32.479560] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.480110] do_vmi_munmap+0x1f1/0x2b0 [ 32.480616] __vm_munmap+0x138/0x3a0 [ 32.481087] __x64_sys_munmap+0x59/0x80 [ 32.481582] do_syscall_64+0x3f/0x90 [ 32.482054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.482695] [ 32.482908] The buggy address belongs to the object at ffff888009505bc8 [ 32.482908] which belongs to the cache vm_area_struct of size 168 [ 32.484369] The buggy address is located 88 bytes inside of [ 32.484369] freed 168-byte region [ffff888009505bc8, ffff888009505c70) [ 32.485776] [ 32.485988] The buggy address belongs to the physical page: [ 32.486647] page:000000004aa55e39 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9505 [ 32.487743] memcg:ffff888009506001 [ 32.488174] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.488825] page_type: 0xffffffff() [ 32.489273] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.490197] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009506001 [ 32.491091] page dumped because: kasan: bad access detected [ 32.491760] [ 32.491972] Memory state around the buggy address: [ 32.492551] ffff888009505b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.493424] ffff888009505b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.494287] >ffff888009505c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.495141] ^ [ 32.495675] ffff888009505c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.496530] ffff888009505d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.497378] ================================================================== [ 32.498289] Disabling lock debugging due to kernel taint [ 34.767077] BUG: Bad rss-counter state mm:00000000f55c2f5c type:MM_FILEPAGES val:33 [ 34.768263] BUG: Bad rss-counter state mm:00000000f55c2f5c type:MM_ANONPAGES val:22 [ 35.155034] BUG: Bad rss-counter state mm:000000004e7767b3 type:MM_FILEPAGES val:33 [ 35.156085] BUG: Bad rss-counter state mm:000000004e7767b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59932' (ECDSA) to the list of known hosts. 2023/06/20 06:55:19 fuzzer started 2023/06/20 06:55:19 dialing manager at localhost:44161 2023/06/20 06:55:19 checking machine... 2023/06/20 06:55:19 checking revisions... [ 35.907171] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:55:19 testing simple program... [ 35.959206] cgroup: Unknown subsys name 'net' [ 36.014252] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:55:17 Registers: info registers vcpu 0 RAX=ffffffff8180c42f RBX=0000000000000001 RCX=ffffffff86137501 RDX=ffff88801cd2f970 RSI=ffffffff8180c42f RDI=ffff88801cd2f928 RBP=ffff88801cd2f980 RSP=ffff88801cd2f8b8 R8 =ffffffff86137542 R9 =ffff88801cd2f968 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801cd2f9f0 R13=ffff88801cd2f970 R14=ffff888019aa0000 R15=ffff88801cd2f928 RIP=ffffffff81130641 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 00007f79d5c8e900 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=00007f79d62460b0 CR3=000000001670a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffaa799ce60 CR3=0000000009a9a000 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=9e6cdb2e719ae08c3841ea47a40ed1e3 XMM02=000000000011dc98ec2efd57dc4c00df XMM03=0000000000124a403e55747f460fe166 XMM04=9d1de67d11c837ab00000000000ae988 XMM05=751b9502027dc0b90000000000134300 XMM06=d13ffa46de4f8e4100000000001334d8 XMM07=e042d86d42eb936e0000000000124d18 XMM08=3e55747f460fe166000000000011dcf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000