syzkaller login: [ 37.646998] BUG: Bad rss-counter state mm:00000000eeec4795 type:MM_FILEPAGES val:33 [ 37.648352] BUG: Bad rss-counter state mm:00000000eeec4795 type:MM_ANONPAGES val:22 [ 37.686788] ================================================================== [ 37.687851] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.688815] Read of size 8 at addr ffff88800df92968 by task sshd/220 [ 37.689600] [ 37.689826] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.690719] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.691756] Call Trace: [ 37.692098] [ 37.692394] dump_stack_lvl+0x91/0xf0 [ 37.692903] print_report+0xcc/0x620 [ 37.693408] ? __virt_addr_valid+0x102/0x340 [ 37.693981] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.694631] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.695274] kasan_report+0xbe/0xf0 [ 37.695801] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.696454] vma_interval_tree_remove+0xc75/0xec0 [ 37.697083] vma_prepare+0xc54/0x11a0 [ 37.697594] __split_vma+0x5af/0x950 [ 37.698093] ? __pfx___split_vma+0x10/0x10 [ 37.698649] ? find_held_lock+0x2c/0x110 [ 37.699194] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.699798] ? lock_is_held_type+0x9f/0x120 [ 37.700359] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.700997] ? mtree_range_walk+0x632/0x900 [ 37.701573] ? mas_walk+0x5c7/0x7c0 [ 37.702071] do_vmi_munmap+0x1f1/0x2b0 [ 37.702585] mmap_region+0x1f9/0x2660 [ 37.703093] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.703632] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.704386] ? __pfx_lock_acquire+0x10/0x10 [ 37.704953] ? __pfx_mmap_region+0x10/0x10 [ 37.705510] ? security_mmap_addr+0x7d/0xa0 [ 37.706073] ? get_unmapped_area+0x1f5/0x3f0 [ 37.706654] do_mmap+0x854/0xf00 [ 37.707114] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.707666] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.708260] ksys_mmap_pgoff+0x3af/0x500 [ 37.708798] do_syscall_64+0x3f/0x90 [ 37.709298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.709973] RIP: 0033:0x7f5cc665ad82 [ 37.710449] 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 [ 37.712711] RSP: 002b:00007ffec52e8628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.713664] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5cc665ad82 [ 37.714736] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5cc5a94000 [ 37.715847] RBP: 00007f5cc5a94000 R08: 0000000000000009 R09: 0000000000001000 [ 37.716968] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a49c535f70 [ 37.718097] R13: 00007ffec52e8640 R14: 00007ffec52e8670 R15: 00007ffec52e89d0 [ 37.719206] [ 37.719591] [ 37.719863] Allocated by task 213: [ 37.720426] kasan_save_stack+0x22/0x50 [ 37.721092] kasan_set_track+0x25/0x30 [ 37.721741] __kasan_slab_alloc+0x59/0x70 [ 37.722423] kmem_cache_alloc+0x16b/0x370 [ 37.723099] vm_area_dup+0x20/0x160 [ 37.723694] __split_vma+0x170/0x950 [ 37.724298] split_vma+0xc6/0x110 [ 37.724873] mprotect_fixup+0x8d2/0xb30 [ 37.725527] do_mprotect_pkey+0x87e/0xd40 [ 37.726201] __x64_sys_mprotect+0x78/0xc0 [ 37.726875] do_syscall_64+0x3f/0x90 [ 37.727499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.728339] [ 37.728616] Freed by task 213: [ 37.729118] kasan_save_stack+0x22/0x50 [ 37.729767] kasan_set_track+0x25/0x30 [ 37.730405] kasan_save_free_info+0x2b/0x50 [ 37.731093] __kasan_slab_free+0x10a/0x190 [ 37.731781] kmem_cache_free+0x10d/0x4d0 [ 37.732430] rcu_core+0x8c8/0x2860 [ 37.733009] __do_softirq+0x1b7/0x7d4 [ 37.733624] [ 37.733893] Last potentially related work creation: [ 37.734641] kasan_save_stack+0x22/0x50 [ 37.735296] __kasan_record_aux_stack+0x8e/0xa0 [ 37.736065] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.736886] remove_vma+0x139/0x170 [ 37.737472] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.738176] do_vmi_munmap+0x1f1/0x2b0 [ 37.738791] __vm_munmap+0x138/0x3a0 [ 37.739386] __x64_sys_munmap+0x59/0x80 [ 37.740029] do_syscall_64+0x3f/0x90 [ 37.740639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.741456] [ 37.741733] Second to last potentially related work creation: [ 37.742619] kasan_save_stack+0x22/0x50 [ 37.743248] __kasan_record_aux_stack+0x8e/0xa0 [ 37.743986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.744803] remove_vma+0x139/0x170 [ 37.745381] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.746095] do_vmi_munmap+0x1f1/0x2b0 [ 37.746690] mmap_region+0x1f9/0x2660 [ 37.747247] do_mmap+0x854/0xf00 [ 37.747770] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.748339] ksys_mmap_pgoff+0x3af/0x500 [ 37.748918] do_syscall_64+0x3f/0x90 [ 37.749479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.750218] [ 37.750466] The buggy address belongs to the object at ffff88800df92910 [ 37.750466] which belongs to the cache vm_area_struct of size 168 [ 37.752180] The buggy address is located 88 bytes inside of [ 37.752180] freed 168-byte region [ffff88800df92910, ffff88800df929b8) [ 37.753812] [ 37.754065] The buggy address belongs to the physical page: [ 37.754886] page:0000000022d5ad97 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf92 [ 37.756241] memcg:ffff88800db20d01 [ 37.756731] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.757472] page_type: 0xffffffff() [ 37.757987] raw: 0100000000000200 ffff88800879fc80 ffffea000036d900 dead000000000008 [ 37.759038] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db20d01 [ 37.760091] page dumped because: kasan: bad access detected [ 37.760878] [ 37.761129] Memory state around the buggy address: [ 37.761829] ffff88800df92800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.762846] ffff88800df92880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.763886] >ffff88800df92900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.764885] ^ [ 37.765812] ffff88800df92980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 37.766824] ffff88800df92a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.767848] ================================================================== [ 37.769270] Disabling lock debugging due to kernel taint [ 39.731666] BUG: Bad rss-counter state mm:00000000bb973c08 type:MM_FILEPAGES val:33 [ 39.732841] BUG: Bad rss-counter state mm:00000000bb973c08 type:MM_ANONPAGES val:22 [ 40.124870] BUG: Bad rss-counter state mm:00000000f005967a type:MM_FILEPAGES val:33 [ 40.125885] BUG: Bad rss-counter state mm:00000000f005967a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54088' (ECDSA) to the list of known hosts. 2023/06/19 14:49:02 fuzzer started 2023/06/19 14:49:03 dialing manager at localhost:44161 2023/06/19 14:49:03 checking machine... 2023/06/19 14:49:03 checking revisions... [ 40.834456] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:49:03 testing simple program... [ 40.888149] cgroup: Unknown subsys name 'net' [ 40.940835] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:48:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8542a6c0 RCX=0000000000000000 RDX=1ffffffff0a8573c RSI=ffffffff815d97de RDI=ffffffff8542b9e0 RBP=ffff88806ce34b60 RSP=ffff88806ce09d68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=0000000000000000 R13=ffff88806ce39518 R14=0000000000000000 R15=ffffffff8542a6c0 RIP=ffffffff815d9803 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 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=00007f8b039d5f70 CR3=00000000098a4000 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=4240e8b4664339a1d547e145e8db0dff XMM02=000000000011cd98eff9b2d0a8fce9cb XMM03=000000000011ce682c67c8bc2e329bc3 XMM04=287252de1da89e3000000000000ae988 XMM05=19e9129bd510f2350000000000135208 XMM06=4fda316b135da52b0000000000135090 XMM07=e042d86d42eb936e0000000000124528 XMM08=59ee5973c1bee45a000000000011ce68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86141eb2 RDX=ffff88806cf09af8 RSI=1ffff1100d9e135e RDI=1ffff1100d9e135e RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86141eb6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000229cd R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800f5cfd98 R15=ffff88806cf09a98 RIP=ffffffff811310bc 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 00007ffbc3266900 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=00007ffbc381d618 CR3=000000001a12c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000