syzkaller login: [ 30.730640] BUG: Bad rss-counter state mm:0000000021addd87 type:MM_FILEPAGES val:33 [ 30.731915] BUG: Bad rss-counter state mm:0000000021addd87 type:MM_ANONPAGES val:22 [ 30.769119] ================================================================== [ 30.770512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.771973] Read of size 8 at addr ffff888009a244e0 by task sshd/219 [ 30.773161] [ 30.773467] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.774804] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.776286] Call Trace: [ 30.776773] [ 30.777236] dump_stack_lvl+0x91/0xf0 [ 30.777967] print_report+0xcc/0x620 [ 30.778710] ? __virt_addr_valid+0x102/0x340 [ 30.779423] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.780439] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.781262] kasan_report+0xbe/0xf0 [ 30.781879] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782699] vma_interval_tree_remove+0xc75/0xec0 [ 30.783486] vma_prepare+0xc54/0x11a0 [ 30.784107] __split_vma+0x5af/0x950 [ 30.784711] ? __pfx___split_vma+0x10/0x10 [ 30.785402] ? find_held_lock+0x2c/0x110 [ 30.786075] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.786829] ? lock_is_held_type+0x9f/0x120 [ 30.787532] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.788328] ? mtree_range_walk+0x632/0x900 [ 30.789041] ? mas_walk+0x5c7/0x7c0 [ 30.789661] do_vmi_munmap+0x1f1/0x2b0 [ 30.790329] mmap_region+0x1f9/0x2660 [ 30.790963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.791637] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.792563] ? __pfx_lock_acquire+0x10/0x10 [ 30.793249] ? __pfx_mmap_region+0x10/0x10 [ 30.793946] ? security_mmap_addr+0x7d/0xa0 [ 30.794650] ? get_unmapped_area+0x1f5/0x3f0 [ 30.795355] do_mmap+0x854/0xf00 [ 30.795926] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.796576] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.797302] ksys_mmap_pgoff+0x3af/0x500 [ 30.797963] do_syscall_64+0x3f/0x90 [ 30.798593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.799322] RIP: 0033:0x7fdcd840dd82 [ 30.799825] 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 [ 30.802133] RSP: 002b:00007ffeff6194e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.803152] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcd840dd82 [ 30.804072] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdcd7847000 [ 30.805056] RBP: 00007fdcd7847000 R08: 0000000000000009 R09: 0000000000001000 [ 30.805968] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606953bff70 [ 30.806882] R13: 00007ffeff619500 R14: 00007ffeff619530 R15: 00007ffeff619890 [ 30.807799] [ 30.808118] [ 30.808348] Allocated by task 212: [ 30.808808] kasan_save_stack+0x22/0x50 [ 30.809387] kasan_set_track+0x25/0x30 [ 30.809957] __kasan_slab_alloc+0x59/0x70 [ 30.810581] kmem_cache_alloc+0x16b/0x370 [ 30.811188] vm_area_dup+0x20/0x160 [ 30.811719] __split_vma+0x170/0x950 [ 30.812263] split_vma+0xc6/0x110 [ 30.812773] mprotect_fixup+0x8d2/0xb30 [ 30.813353] do_mprotect_pkey+0x87e/0xd40 [ 30.813971] __x64_sys_mprotect+0x78/0xc0 [ 30.814587] do_syscall_64+0x3f/0x90 [ 30.815135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.815883] [ 30.816125] Freed by task 202: [ 30.816555] kasan_save_stack+0x22/0x50 [ 30.817104] kasan_set_track+0x25/0x30 [ 30.817635] kasan_save_free_info+0x2b/0x50 [ 30.818217] __kasan_slab_free+0x10a/0x190 [ 30.818802] kmem_cache_free+0x10d/0x4d0 [ 30.819348] rcu_core+0x8c8/0x2860 [ 30.819833] __do_softirq+0x1b7/0x7d4 [ 30.820356] [ 30.820601] Last potentially related work creation: [ 30.821228] kasan_save_stack+0x22/0x50 [ 30.821773] __kasan_record_aux_stack+0x8e/0xa0 [ 30.822417] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.823124] remove_vma+0x139/0x170 [ 30.823615] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.824211] do_vmi_munmap+0x1f1/0x2b0 [ 30.824736] __vm_munmap+0x138/0x3a0 [ 30.825240] __x64_sys_munmap+0x59/0x80 [ 30.825768] do_syscall_64+0x3f/0x90 [ 30.826289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.826978] [ 30.827207] Second to last potentially related work creation: [ 30.827929] kasan_save_stack+0x22/0x50 [ 30.828463] __kasan_record_aux_stack+0x8e/0xa0 [ 30.829080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.829763] remove_vma+0x139/0x170 [ 30.830266] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.831084] do_vmi_munmap+0x1f1/0x2b0 [ 30.831645] mmap_region+0x1f9/0x2660 [ 30.832161] do_mmap+0x854/0xf00 [ 30.832619] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.833146] ksys_mmap_pgoff+0x3af/0x500 [ 30.833684] do_syscall_64+0x3f/0x90 [ 30.834200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834883] [ 30.835116] The buggy address belongs to the object at ffff888009a24488 [ 30.835116] which belongs to the cache vm_area_struct of size 168 [ 30.836674] The buggy address is located 88 bytes inside of [ 30.836674] freed 168-byte region [ffff888009a24488, ffff888009a24530) [ 30.838197] [ 30.838433] The buggy address belongs to the physical page: [ 30.839135] page:00000000d1aaaf0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a24 [ 30.840289] memcg:ffff88800e35c601 [ 30.840743] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.841498] page_type: 0xffffffff() [ 30.841983] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7780 dead000000000005 [ 30.842971] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e35c601 [ 30.843941] page dumped because: kasan: bad access detected [ 30.844645] [ 30.844877] Memory state around the buggy address: [ 30.845506] ffff888009a24380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.846428] ffff888009a24400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.847343] >ffff888009a24480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.848269] ^ [ 30.849108] ffff888009a24500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.850069] ffff888009a24580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.851046] ================================================================== [ 30.852236] Disabling lock debugging due to kernel taint [ 32.468954] BUG: Bad rss-counter state mm:00000000791af564 type:MM_FILEPAGES val:33 [ 32.470140] BUG: Bad rss-counter state mm:00000000791af564 type:MM_ANONPAGES val:22 [ 32.891239] BUG: Bad rss-counter state mm:0000000034a960e4 type:MM_FILEPAGES val:33 [ 32.892743] BUG: Bad rss-counter state mm:0000000034a960e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57453' (ECDSA) to the list of known hosts. 2023/06/20 15:39:00 fuzzer started 2023/06/20 15:39:01 dialing manager at localhost:36067 2023/06/20 15:39:01 checking machine... 2023/06/20 15:39:01 checking revisions... [ 33.587905] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:39:01 testing simple program... [ 33.632145] cgroup: Unknown subsys name 'net' [ 33.669128] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:39:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028fceb0 RSI=ffffffff8366b8df RDI=ffff8880147e7580 RBP=ffff8880147e7618 RSP=ffff8880147e7558 R8 =0000000000000001 R9 =ffff8880147e75c0 R10=0000000000038001 R11=0000000000020cbd R12=ffff8880147e7648 R13=0000000000000000 R14=ffff888014603680 R15=ffff8880147e7580 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007f723c57b900 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=00007f723ba10500 CR3=000000000ca44000 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=cb9651a19d8653ab8e467a5e59947bc1 XMM02=000000000011b070d59e07bde36eea69 XMM03=000000000011b198ec2efd57dc4c00df XMM04=4e35a2c1dc26fd1200000000000ae988 XMM05=92e3220d8053aa3a00000000001340d0 XMM06=806171799158d9670000000000132ec0 XMM07=fb795ef6d65770560000000000121ea0 XMM08=2c67c8bc2e329bc3000000000011b198 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000559d22c023b0 RSI=0000000000000007 RDI=ffff88801653ff58 RBP=ffff88801653ff58 RSP=ffff88801653ff20 R8 =0000000000000006 R9 =0000559d22c023b0 R10=00007ffffffff000 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=0000559d22c023b0 R15=0000000000000000 RIP=ffffffff8113b3f4 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f01b38dd900 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=0000559d22c023b0 CR3=000000000c57a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000