syzkaller login: [ 28.751599] BUG: Bad rss-counter state mm:00000000d1eb4737 type:MM_FILEPAGES val:33 [ 28.752961] BUG: Bad rss-counter state mm:00000000d1eb4737 type:MM_ANONPAGES val:22 [ 28.940047] ================================================================== [ 28.941121] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.942235] Read of size 8 at addr ffff88800d526c20 by task sshd/219 [ 28.943246] [ 28.943508] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.944420] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.945397] Call Trace: [ 28.945717] [ 28.946003] dump_stack_lvl+0x91/0xf0 [ 28.946500] print_report+0xcc/0x620 [ 28.946998] ? __virt_addr_valid+0x102/0x340 [ 28.947555] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.948175] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.948798] kasan_report+0xbe/0xf0 [ 28.949274] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.949900] vma_interval_tree_remove+0xc75/0xec0 [ 28.950507] vma_prepare+0xc54/0x11a0 [ 28.950999] __split_vma+0x5af/0x950 [ 28.951476] ? __pfx___split_vma+0x10/0x10 [ 28.952011] ? find_held_lock+0x2c/0x110 [ 28.952537] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.953106] ? lock_is_held_type+0x9f/0x120 [ 28.953650] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.954265] ? mtree_range_walk+0x632/0x900 [ 28.954816] ? mas_walk+0x5c7/0x7c0 [ 28.955313] do_vmi_munmap+0x1f1/0x2b0 [ 28.955807] mmap_region+0x1f9/0x2660 [ 28.956290] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.956803] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.957521] ? __pfx_lock_acquire+0x10/0x10 [ 28.958058] ? __pfx_mmap_region+0x10/0x10 [ 28.958591] ? security_mmap_addr+0x7d/0xa0 [ 28.959127] ? get_unmapped_area+0x1f5/0x3f0 [ 28.959685] do_mmap+0x854/0xf00 [ 28.960126] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.960623] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.961190] ksys_mmap_pgoff+0x3af/0x500 [ 28.961698] do_syscall_64+0x3f/0x90 [ 28.962180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.962832] RIP: 0033:0x7fdf17f2ed82 [ 28.963303] 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 [ 28.965441] RSP: 002b:00007ffd70138aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.966352] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf17f2ed82 [ 28.967210] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf17368000 [ 28.968068] RBP: 00007fdf17368000 R08: 0000000000000009 R09: 0000000000001000 [ 28.968922] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646f4ce6ec0 [ 28.969774] R13: 00007ffd70138ac0 R14: 00007ffd70138af0 R15: 00007ffd70138e50 [ 28.970638] [ 28.970930] [ 28.971158] Allocated by task 212: [ 28.971590] kasan_save_stack+0x22/0x50 [ 28.972099] kasan_set_track+0x25/0x30 [ 28.972594] __kasan_slab_alloc+0x59/0x70 [ 28.973122] kmem_cache_alloc+0x16b/0x370 [ 28.973638] vm_area_dup+0x20/0x160 [ 28.974095] __split_vma+0x170/0x950 [ 28.974561] split_vma+0xc6/0x110 [ 28.975017] mprotect_fixup+0x8d2/0xb30 [ 28.975521] do_mprotect_pkey+0x87e/0xd40 [ 28.976045] __x64_sys_mprotect+0x78/0xc0 [ 28.976565] do_syscall_64+0x3f/0x90 [ 28.977041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.977691] [ 28.977906] Freed by task 19: [ 28.978292] kasan_save_stack+0x22/0x50 [ 28.978794] kasan_set_track+0x25/0x30 [ 28.979297] kasan_save_free_info+0x2b/0x50 [ 28.979831] __kasan_slab_free+0x10a/0x190 [ 28.980364] kmem_cache_free+0x10d/0x4d0 [ 28.980871] rcu_core+0x8c8/0x2860 [ 28.981317] __do_softirq+0x1b7/0x7d4 [ 28.981794] [ 28.982011] Last potentially related work creation: [ 28.982603] kasan_save_stack+0x22/0x50 [ 28.983103] __kasan_record_aux_stack+0x8e/0xa0 [ 28.983699] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.984340] remove_vma+0x139/0x170 [ 28.984795] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.985361] do_vmi_munmap+0x1f1/0x2b0 [ 28.985852] __vm_munmap+0x138/0x3a0 [ 28.986333] __x64_sys_munmap+0x59/0x80 [ 28.986843] do_syscall_64+0x3f/0x90 [ 28.987380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.988037] [ 28.988254] Second to last potentially related work creation: [ 28.988961] kasan_save_stack+0x22/0x50 [ 28.989469] __kasan_record_aux_stack+0x8e/0xa0 [ 28.990041] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.990698] remove_vma+0x139/0x170 [ 28.991170] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.991735] do_vmi_munmap+0x1f1/0x2b0 [ 28.992232] mmap_region+0x1f9/0x2660 [ 28.992721] do_mmap+0x854/0xf00 [ 28.993163] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.993656] ksys_mmap_pgoff+0x3af/0x500 [ 28.994163] do_syscall_64+0x3f/0x90 [ 28.994661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.995349] [ 28.995573] The buggy address belongs to the object at ffff88800d526bc8 [ 28.995573] which belongs to the cache vm_area_struct of size 168 [ 28.997133] The buggy address is located 88 bytes inside of [ 28.997133] freed 168-byte region [ffff88800d526bc8, ffff88800d526c70) [ 28.998604] [ 28.998828] The buggy address belongs to the physical page: [ 28.999532] page:00000000a2285eda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd526 [ 29.000687] memcg:ffff88800d2c5001 [ 29.001136] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.001807] page_type: 0xffffffff() [ 29.002280] raw: 0100000000000200 ffff8880087a0c80 ffffea0000389b00 dead000000000008 [ 29.003263] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2c5001 [ 29.004240] page dumped because: kasan: bad access detected [ 29.004956] [ 29.005180] Memory state around the buggy address: [ 29.005802] ffff88800d526b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.006689] ffff88800d526b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.007560] >ffff88800d526c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.008430] ^ [ 29.008959] ffff88800d526c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.009823] ffff88800d526d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.010677] ================================================================== [ 29.011679] Disabling lock debugging due to kernel taint [ 31.459162] BUG: Bad rss-counter state mm:0000000074d47d8d type:MM_FILEPAGES val:33 [ 31.460281] BUG: Bad rss-counter state mm:0000000074d47d8d type:MM_ANONPAGES val:22 [ 31.903122] BUG: Bad rss-counter state mm:00000000923deeff type:MM_FILEPAGES val:33 [ 31.904104] BUG: Bad rss-counter state mm:00000000923deeff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19886' (ECDSA) to the list of known hosts. 2023/06/20 19:39:50 fuzzer started 2023/06/20 19:39:50 dialing manager at localhost:36067 2023/06/20 19:39:50 checking machine... 2023/06/20 19:39:50 checking revisions... [ 32.531039] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:39:50 testing simple program... [ 32.585421] cgroup: Unknown subsys name 'net' [ 32.637947] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:39:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016dbf9c0 RCX=ffff888016dbfa60 RDX=1ffff11002db7f43 RSI=ffff888016dbfa58 RDI=ffffffff813ad720 RBP=ffff888016dbfa18 RSP=ffff888016dbf9a8 R8 =0000000000000001 R9 =ffff888016dbfa00 R10=0000000000038001 R11=0000000000003c0d R12=ffff888016dbfa88 R13=0000000000000000 R14=ffff88800cbd3680 R15=ffff888019f66fa8 RIP=ffffffff811303b2 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 00007fea67fee900 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=00007ffca1899000 CR3=0000000016aea000 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=00000000000000000000000000000000 XMM01=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86138e8c RDX=1ffff1100d9e1353 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86138e90 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09de8 R15=ffff88806cf09a98 RIP=ffffffff81131271 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 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=00007f8260e22fe0 CR3=000000000f708000 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=d17b995c3c1c53847142b083181d9d0c XMM02=2c67c8bc2e329bc3000000000011b750 XMM03=fb795ef6d65770560000000000121cd0 XMM04=107b3c348608d6b500000000000ae988 XMM05=19e9129bd510f2350000000000133588 XMM06=d116d13d2c4ef3b100000000001323f0 XMM07=e042d86d42eb936e0000000000121fa8 XMM08=0aac488a2818cbae000000000011b7b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000