syzkaller login: [ 38.711345] BUG: Bad rss-counter state mm:000000006bcc8e6b type:MM_FILEPAGES val:33 [ 38.712464] BUG: Bad rss-counter state mm:000000006bcc8e6b type:MM_ANONPAGES val:22 [ 38.893587] ================================================================== [ 38.894568] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.895543] Read of size 8 at addr ffff88801824a880 by task sshd/220 [ 38.896420] [ 38.896744] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.897810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.898990] Call Trace: [ 38.899364] [ 38.899698] dump_stack_lvl+0x91/0xf0 [ 38.900277] print_report+0xcc/0x620 [ 38.900848] ? __virt_addr_valid+0x102/0x340 [ 38.901505] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.902240] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.902988] kasan_report+0xbe/0xf0 [ 38.903559] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.904301] vma_interval_tree_remove+0xc75/0xec0 [ 38.905022] vma_prepare+0xc54/0x11a0 [ 38.905589] __split_vma+0x5af/0x950 [ 38.906160] ? __pfx___split_vma+0x10/0x10 [ 38.906815] ? find_held_lock+0x2c/0x110 [ 38.907438] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.908115] ? lock_is_held_type+0x9f/0x120 [ 38.908757] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.909487] ? mtree_range_walk+0x632/0x900 [ 38.910149] ? mas_walk+0x5c7/0x7c0 [ 38.910733] do_vmi_munmap+0x1f1/0x2b0 [ 38.911311] mmap_region+0x1f9/0x2660 [ 38.911875] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.912470] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.913304] ? __pfx_lock_acquire+0x10/0x10 [ 38.913925] ? __pfx_mmap_region+0x10/0x10 [ 38.914560] ? security_mmap_addr+0x7d/0xa0 [ 38.915184] ? get_unmapped_area+0x1f5/0x3f0 [ 38.915823] do_mmap+0x854/0xf00 [ 38.916344] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.916924] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.917588] ksys_mmap_pgoff+0x3af/0x500 [ 38.918179] do_syscall_64+0x3f/0x90 [ 38.918755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919512] RIP: 0033:0x7f346b4dad82 [ 38.920050] 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 [ 38.922540] RSP: 002b:00007ffca049fa18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.923603] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f346b4dad82 [ 38.924573] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f346a914000 [ 38.925519] RBP: 00007f346a914000 R08: 0000000000000009 R09: 0000000000001000 [ 38.926481] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e6cc25ec0 [ 38.927432] R13: 00007ffca049fa30 R14: 00007ffca049fa60 R15: 00007ffca049fdc0 [ 38.928388] [ 38.928716] [ 38.928959] Allocated by task 213: [ 38.929434] kasan_save_stack+0x22/0x50 [ 38.929997] kasan_set_track+0x25/0x30 [ 38.930563] __kasan_slab_alloc+0x59/0x70 [ 38.931166] kmem_cache_alloc+0x16b/0x370 [ 38.931753] vm_area_dup+0x20/0x160 [ 38.932274] __split_vma+0x170/0x950 [ 38.932815] split_vma+0xc6/0x110 [ 38.933327] mprotect_fixup+0x8d2/0xb30 [ 38.933911] do_mprotect_pkey+0x87e/0xd40 [ 38.934520] __x64_sys_mprotect+0x78/0xc0 [ 38.935127] do_syscall_64+0x3f/0x90 [ 38.935678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936423] [ 38.936672] Freed by task 213: [ 38.937129] kasan_save_stack+0x22/0x50 [ 38.937709] kasan_set_track+0x25/0x30 [ 38.938281] kasan_save_free_info+0x2b/0x50 [ 38.938920] __kasan_slab_free+0x10a/0x190 [ 38.939543] kmem_cache_free+0x10d/0x4d0 [ 38.940137] rcu_core+0x8c8/0x2860 [ 38.940653] __do_softirq+0x1b7/0x7d4 [ 38.941207] [ 38.941457] Last potentially related work creation: [ 38.942131] kasan_save_stack+0x22/0x50 [ 38.942734] __kasan_record_aux_stack+0x8e/0xa0 [ 38.943393] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.944136] remove_vma+0x139/0x170 [ 38.944654] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.945296] do_vmi_munmap+0x1f1/0x2b0 [ 38.945849] __vm_munmap+0x138/0x3a0 [ 38.946381] __x64_sys_munmap+0x59/0x80 [ 38.946964] do_syscall_64+0x3f/0x90 [ 38.947506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948246] [ 38.948489] The buggy address belongs to the object at ffff88801824a828 [ 38.948489] which belongs to the cache vm_area_struct of size 168 [ 38.950178] The buggy address is located 88 bytes inside of [ 38.950178] freed 168-byte region [ffff88801824a828, ffff88801824a8d0) [ 38.951805] [ 38.952053] The buggy address belongs to the physical page: [ 38.952817] page:00000000112858cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1824a [ 38.954072] memcg:ffff88801a155c01 [ 38.954566] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.955300] page_type: 0xffffffff() [ 38.955817] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.956879] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a155c01 [ 38.957917] page dumped because: kasan: bad access detected [ 38.958698] [ 38.958946] Memory state around the buggy address: [ 38.959617] ffff88801824a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.960592] ffff88801824a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.961568] >ffff88801824a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.962543] ^ [ 38.963003] ffff88801824a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.963947] ffff88801824a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.964874] ================================================================== [ 38.966010] Disabling lock debugging due to kernel taint [ 41.280568] BUG: Bad rss-counter state mm:0000000006e44238 type:MM_FILEPAGES val:33 [ 41.282130] BUG: Bad rss-counter state mm:0000000006e44238 type:MM_ANONPAGES val:22 [ 41.790963] BUG: Bad rss-counter state mm:000000009412d3f1 type:MM_FILEPAGES val:33 [ 41.791950] BUG: Bad rss-counter state mm:000000009412d3f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28526' (ECDSA) to the list of known hosts. 2023/06/20 16:02:15 fuzzer started 2023/06/20 16:02:15 dialing manager at localhost:36067 2023/06/20 16:02:15 checking machine... 2023/06/20 16:02:15 checking revisions... [ 42.449612] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:02:15 testing simple program... [ 42.497191] cgroup: Unknown subsys name 'net' [ 42.539855] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:02:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff86097f2a RDX=0000000000000001 RSI=dffffc0000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86097f2e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006054 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888006807170 R15=ffff88806ce09a98 RIP=ffffffff811311b8 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 00007f98f0ee2900 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=00007f98f03778f0 CR3=000000000ca3e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=fc517eb7ca42d06800000000000ae988 XMM05=01804afb41828cce0000000000133990 XMM06=e4cb8bb95a7664b600000000001327f0 XMM07=fb795ef6d657705600000000001222e8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0ff3380 RBX=0000000000000024 RCX=dffffc0000000000 RDX=ffff88800fdb51c0 RSI=ffffffff83723c5c RDI=0000000000000005 RBP=0000000000000025 RSP=ffff888016bcf7c0 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99c00 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff83723c71 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 00007f1993a32900 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=00007ffd65ea3000 CR3=00000000147f4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000