syzkaller login: [ 31.084692] BUG: Bad rss-counter state mm:00000000f1c37020 type:MM_FILEPAGES val:33 [ 31.085723] BUG: Bad rss-counter state mm:00000000f1c37020 type:MM_ANONPAGES val:22 [ 31.293038] ================================================================== [ 31.293901] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.294784] Read of size 8 at addr ffff88800fced880 by task sshd/221 [ 31.295505] [ 31.295715] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.296665] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.297587] Call Trace: [ 31.297889] [ 31.298162] dump_stack_lvl+0x91/0xf0 [ 31.298662] print_report+0xcc/0x620 [ 31.299122] ? __virt_addr_valid+0x102/0x340 [ 31.299641] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300243] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300825] kasan_report+0xbe/0xf0 [ 31.301278] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.301868] vma_interval_tree_remove+0xc75/0xec0 [ 31.302449] vma_prepare+0xc54/0x11a0 [ 31.302910] __split_vma+0x5af/0x950 [ 31.303397] ? __pfx___split_vma+0x10/0x10 [ 31.303937] ? find_held_lock+0x2c/0x110 [ 31.304467] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.305024] ? lock_is_held_type+0x9f/0x120 [ 31.305573] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.306174] ? mtree_range_walk+0x632/0x900 [ 31.306730] ? mas_walk+0x5c7/0x7c0 [ 31.307215] do_vmi_munmap+0x1f1/0x2b0 [ 31.307710] mmap_region+0x1f9/0x2660 [ 31.308192] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.308714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.309424] ? __pfx_lock_acquire+0x10/0x10 [ 31.309964] ? __pfx_mmap_region+0x10/0x10 [ 31.310504] ? security_mmap_addr+0x7d/0xa0 [ 31.311044] ? get_unmapped_area+0x1f5/0x3f0 [ 31.311589] do_mmap+0x854/0xf00 [ 31.312036] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.312549] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.313118] ksys_mmap_pgoff+0x3af/0x500 [ 31.313635] do_syscall_64+0x3f/0x90 [ 31.314120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314769] RIP: 0033:0x7f152699ad82 [ 31.315224] 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 [ 31.317418] RSP: 002b:00007ffe92a61de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.318342] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f152699ad82 [ 31.319196] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1525dd4000 [ 31.320060] RBP: 00007f1525dd4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.320930] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2dda0eec0 [ 31.321797] R13: 00007ffe92a61e00 R14: 00007ffe92a61e30 R15: 00007ffe92a62190 [ 31.322674] [ 31.322969] [ 31.323188] Allocated by task 212: [ 31.323626] kasan_save_stack+0x22/0x50 [ 31.324148] kasan_set_track+0x25/0x30 [ 31.324652] __kasan_slab_alloc+0x59/0x70 [ 31.325180] kmem_cache_alloc+0x16b/0x370 [ 31.325707] vm_area_dup+0x20/0x160 [ 31.326172] __split_vma+0x170/0x950 [ 31.326637] split_vma+0xc6/0x110 [ 31.327086] mprotect_fixup+0x8d2/0xb30 [ 31.327589] do_mprotect_pkey+0x87e/0xd40 [ 31.328104] __x64_sys_mprotect+0x78/0xc0 [ 31.328645] do_syscall_64+0x3f/0x90 [ 31.329129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.329775] [ 31.329995] Freed by task 212: [ 31.330394] kasan_save_stack+0x22/0x50 [ 31.330908] kasan_set_track+0x25/0x30 [ 31.331401] kasan_save_free_info+0x2b/0x50 [ 31.331934] __kasan_slab_free+0x10a/0x190 [ 31.332493] kmem_cache_free+0x10d/0x4d0 [ 31.333007] rcu_core+0x8c8/0x2860 [ 31.333462] __do_softirq+0x1b7/0x7d4 [ 31.333941] [ 31.334157] Last potentially related work creation: [ 31.334758] kasan_save_stack+0x22/0x50 [ 31.335262] __kasan_record_aux_stack+0x8e/0xa0 [ 31.335832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.336513] remove_vma+0x139/0x170 [ 31.336980] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.337535] do_vmi_munmap+0x1f1/0x2b0 [ 31.338023] __vm_munmap+0x138/0x3a0 [ 31.338495] __x64_sys_munmap+0x59/0x80 [ 31.338992] do_syscall_64+0x3f/0x90 [ 31.339466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.340115] [ 31.340337] The buggy address belongs to the object at ffff88800fced828 [ 31.340337] which belongs to the cache vm_area_struct of size 168 [ 31.341824] The buggy address is located 88 bytes inside of [ 31.341824] freed 168-byte region [ffff88800fced828, ffff88800fced8d0) [ 31.343260] [ 31.343482] The buggy address belongs to the physical page: [ 31.344165] page:00000000eae9899b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfced [ 31.345273] memcg:ffff88800e56d601 [ 31.345704] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.346365] page_type: 0xffffffff() [ 31.346821] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.347761] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e56d601 [ 31.348701] page dumped because: kasan: bad access detected [ 31.349379] [ 31.349595] Memory state around the buggy address: [ 31.350186] ffff88800fced780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.351050] ffff88800fced800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.351929] >ffff88800fced880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.352960] ^ [ 31.353462] ffff88800fced900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.354530] ffff88800fced980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.355566] ================================================================== [ 31.356855] Disabling lock debugging due to kernel taint [ 33.303937] BUG: Bad rss-counter state mm:000000003361c589 type:MM_FILEPAGES val:33 [ 33.305120] BUG: Bad rss-counter state mm:000000003361c589 type:MM_ANONPAGES val:22 [ 33.779990] BUG: Bad rss-counter state mm:0000000008ed4c4d type:MM_FILEPAGES val:33 [ 33.781211] BUG: Bad rss-counter state mm:0000000008ed4c4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34936' (ECDSA) to the list of known hosts. 2023/06/21 06:23:14 fuzzer started 2023/06/21 06:23:14 dialing manager at localhost:36067 2023/06/21 06:23:14 checking machine... 2023/06/21 06:23:14 checking revisions... [ 34.425745] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:23:15 testing simple program... [ 34.474288] cgroup: Unknown subsys name 'net' [ 34.511944] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:23:14 Registers: info registers vcpu 0 RAX=ffff888015bdca00 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000007 RDI=ffff8880160d7f58 RBP=ffff8880160d7f58 RSP=ffff8880160d7f28 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00007fca641ff044 R15=0000000000000000 RIP=ffffffff845115e2 RFL=00000087 [--S--PC] 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 00007fca636ab900 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=00007fca641ff044 CR3=000000000b3bc000 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=000000000000000000000000000000ff XMM02=2f34e30d8d50a395b19e5140264697a1 XMM03=58393ef8ca7cc0dc16c494df4b70e219 XMM04=5cb71d508af9cf7b483f1a0bf84e3ffe XMM05=000000000000000000000000000000ff XMM06=58391d508a7cc07b163f1a0b4b4e3f19 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fc0fb178f70 CR3=0000000008ed6000 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=268f49bc2dbaac86364613b3a0758642 XMM02=000000000011c390eff9b2d0a8fce9cb XMM03=000000000011c4602c67c8bc2e329bc3 XMM04=8fa88f22d0f6e39500000000000ae988 XMM05=dfcdbad4f1609c370000000000133068 XMM06=806171799158d9670000000000132ef0 XMM07=e042d86d42eb936e0000000000123158 XMM08=7bfdea36cc9d22b5000000000011c460 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000