syzkaller login: [ 30.089511] BUG: Bad rss-counter state mm:00000000c8be8e91 type:MM_FILEPAGES val:33 [ 30.090519] BUG: Bad rss-counter state mm:00000000c8be8e91 type:MM_ANONPAGES val:22 [ 30.266152] ================================================================== [ 30.267235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.268349] Read of size 8 at addr ffff88800db70310 by task sshd/221 [ 30.269502] [ 30.269765] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.270794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.271931] Call Trace: [ 30.272248] [ 30.272531] dump_stack_lvl+0x91/0xf0 [ 30.273038] print_report+0xcc/0x620 [ 30.273515] ? __virt_addr_valid+0x102/0x340 [ 30.274056] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.274687] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.275348] kasan_report+0xbe/0xf0 [ 30.275875] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.276490] vma_interval_tree_remove+0xc75/0xec0 [ 30.277117] vma_prepare+0xc54/0x11a0 [ 30.277602] __split_vma+0x5af/0x950 [ 30.278072] ? __pfx___split_vma+0x10/0x10 [ 30.278600] ? find_held_lock+0x2c/0x110 [ 30.279117] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.279681] ? lock_is_held_type+0x9f/0x120 [ 30.280219] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.280847] ? mtree_range_walk+0x632/0x900 [ 30.281396] ? mas_walk+0x5c7/0x7c0 [ 30.281872] do_vmi_munmap+0x1f1/0x2b0 [ 30.282359] mmap_region+0x1f9/0x2660 [ 30.282835] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.283346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.284052] ? __pfx_lock_acquire+0x10/0x10 [ 30.284582] ? __pfx_mmap_region+0x10/0x10 [ 30.285116] ? security_mmap_addr+0x7d/0xa0 [ 30.285641] ? get_unmapped_area+0x1f5/0x3f0 [ 30.286183] do_mmap+0x854/0xf00 [ 30.286618] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.287104] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.287667] ksys_mmap_pgoff+0x3af/0x500 [ 30.288167] do_syscall_64+0x3f/0x90 [ 30.288645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.289313] RIP: 0033:0x7fbbfa7e1d82 [ 30.289770] 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 [ 30.291871] RSP: 002b:00007ffd2ecb5ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.292784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbbfa7e1d82 [ 30.293626] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbbf9c1b000 [ 30.294470] RBP: 00007fbbf9c1b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.295318] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650ca4f2ec0 [ 30.296157] R13: 00007ffd2ecb5cc0 R14: 00007ffd2ecb5cf0 R15: 00007ffd2ecb6050 [ 30.297013] [ 30.297301] [ 30.297516] Allocated by task 214: [ 30.297945] kasan_save_stack+0x22/0x50 [ 30.298447] kasan_set_track+0x25/0x30 [ 30.298940] __kasan_slab_alloc+0x59/0x70 [ 30.299461] kmem_cache_alloc+0x16b/0x370 [ 30.299974] vm_area_dup+0x20/0x160 [ 30.300426] __split_vma+0x170/0x950 [ 30.300903] split_vma+0xc6/0x110 [ 30.301336] mprotect_fixup+0x8d2/0xb30 [ 30.301833] do_mprotect_pkey+0x87e/0xd40 [ 30.302351] __x64_sys_mprotect+0x78/0xc0 [ 30.302870] do_syscall_64+0x3f/0x90 [ 30.303341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.303977] [ 30.304189] Freed by task 214: [ 30.304580] kasan_save_stack+0x22/0x50 [ 30.305084] kasan_set_track+0x25/0x30 [ 30.305574] kasan_save_free_info+0x2b/0x50 [ 30.306107] __kasan_slab_free+0x10a/0x190 [ 30.306642] kmem_cache_free+0x10d/0x4d0 [ 30.307144] rcu_core+0x8c8/0x2860 [ 30.307580] __do_softirq+0x1b7/0x7d4 [ 30.308050] [ 30.308263] Last potentially related work creation: [ 30.308857] kasan_save_stack+0x22/0x50 [ 30.309357] __kasan_record_aux_stack+0x8e/0xa0 [ 30.309976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.310615] remove_vma+0x139/0x170 [ 30.311068] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.311619] do_vmi_munmap+0x1f1/0x2b0 [ 30.312100] __vm_munmap+0x138/0x3a0 [ 30.312561] __x64_sys_munmap+0x59/0x80 [ 30.313065] do_syscall_64+0x3f/0x90 [ 30.313534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.314175] [ 30.314388] Second to last potentially related work creation: [ 30.315062] kasan_save_stack+0x22/0x50 [ 30.315555] __kasan_record_aux_stack+0x8e/0xa0 [ 30.316121] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.316779] remove_vma+0x139/0x170 [ 30.317225] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.317777] do_vmi_munmap+0x1f1/0x2b0 [ 30.318260] mmap_region+0x1f9/0x2660 [ 30.318740] do_mmap+0x854/0xf00 [ 30.319173] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.319656] ksys_mmap_pgoff+0x3af/0x500 [ 30.320153] do_syscall_64+0x3f/0x90 [ 30.320627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.321268] [ 30.321480] The buggy address belongs to the object at ffff88800db702b8 [ 30.321480] which belongs to the cache vm_area_struct of size 168 [ 30.322939] The buggy address is located 88 bytes inside of [ 30.322939] freed 168-byte region [ffff88800db702b8, ffff88800db70360) [ 30.324333] [ 30.324547] The buggy address belongs to the physical page: [ 30.325211] page:00000000e8cd526c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb70 [ 30.326288] memcg:ffff88800df9ed01 [ 30.326713] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.327406] page_type: 0xffffffff() [ 30.327853] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.328785] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df9ed01 [ 30.329686] page dumped because: kasan: bad access detected [ 30.330336] [ 30.330548] Memory state around the buggy address: [ 30.331124] ffff88800db70200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.331983] ffff88800db70280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.332858] >ffff88800db70300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.333695] ^ [ 30.334168] ffff88800db70380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.335037] ffff88800db70400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.335883] ================================================================== [ 30.336882] Disabling lock debugging due to kernel taint [ 32.320609] BUG: Bad rss-counter state mm:00000000adbd34f2 type:MM_FILEPAGES val:33 [ 32.321605] BUG: Bad rss-counter state mm:00000000adbd34f2 type:MM_ANONPAGES val:22 [ 32.807248] BUG: Bad rss-counter state mm:0000000048b873be type:MM_FILEPAGES val:33 [ 32.808746] BUG: Bad rss-counter state mm:0000000048b873be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33467' (ECDSA) to the list of known hosts. 2023/06/20 21:00:48 fuzzer started 2023/06/20 21:00:49 dialing manager at localhost:36067 2023/06/20 21:00:49 checking machine... 2023/06/20 21:00:49 checking revisions... [ 33.549266] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:00:49 testing simple program... [ 33.604437] cgroup: Unknown subsys name 'net' [ 33.661885] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:00:48 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f5785dd3650 CR3=0000000016754000 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=2038343a30303a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a30303a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880094afc20 RCX=0000000000000000 RDX=ffff8880164fd1c0 RSI=ffffffff81f759e5 RDI=0000000000000002 RBP=ffff8880094afc38 RSP=ffff8880094af9b8 R8 =0000000000000002 R9 =0000000000000002 R10=000000000000002b R11=00000000000b6a61 R12=ffff888008dfc0f8 R13=ffff888008dfc0e0 R14=1ffff11001295f3b R15=0000000000000001 RIP=ffffffff81f759ea RFL=00000293 [--S-A-C] 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 00007f578581e900 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=00007f5785dd5618 CR3=000000000ef40000 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