syzkaller login: [ 26.314689] BUG: Bad rss-counter state mm:000000007a10b99e type:MM_FILEPAGES val:33 [ 26.316001] BUG: Bad rss-counter state mm:000000007a10b99e type:MM_ANONPAGES val:22 [ 26.354404] ================================================================== [ 26.355308] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.356478] Read of size 8 at addr ffff88801680c058 by task sshd/218 [ 26.357363] [ 26.357585] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.358501] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.359522] Call Trace: [ 26.359841] [ 26.360132] dump_stack_lvl+0x91/0xf0 [ 26.360615] print_report+0xcc/0x620 [ 26.361101] ? __virt_addr_valid+0x102/0x340 [ 26.361646] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.362272] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.363031] kasan_report+0xbe/0xf0 [ 26.363544] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.364161] vma_interval_tree_remove+0xc75/0xec0 [ 26.364769] vma_prepare+0xc54/0x11a0 [ 26.365260] __split_vma+0x5af/0x950 [ 26.365727] ? __pfx___split_vma+0x10/0x10 [ 26.366284] ? find_held_lock+0x2c/0x110 [ 26.366804] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.367364] ? lock_is_held_type+0x9f/0x120 [ 26.367910] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.368516] ? mtree_range_walk+0x632/0x900 [ 26.369064] ? mas_walk+0x5c7/0x7c0 [ 26.369546] do_vmi_munmap+0x1f1/0x2b0 [ 26.370036] mmap_region+0x1f9/0x2660 [ 26.370534] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.371048] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.371756] ? __pfx_lock_acquire+0x10/0x10 [ 26.372292] ? __pfx_mmap_region+0x10/0x10 [ 26.372819] ? security_mmap_addr+0x7d/0xa0 [ 26.373346] ? get_unmapped_area+0x1f5/0x3f0 [ 26.373893] do_mmap+0x854/0xf00 [ 26.374339] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.374828] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.375383] ksys_mmap_pgoff+0x3af/0x500 [ 26.375882] do_syscall_64+0x3f/0x90 [ 26.376356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.376996] RIP: 0033:0x7feb04b76d82 [ 26.377452] 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 [ 26.379580] RSP: 002b:00007ffe734c3e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.380474] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb04b76d82 [ 26.381314] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb03fb0000 [ 26.382167] RBP: 00007feb03fb0000 R08: 0000000000000009 R09: 0000000000001000 [ 26.383004] R10: 0000000000000812 R11: 0000000000000206 R12: 000055648eae4d90 [ 26.383845] R13: 00007ffe734c3e30 R14: 00007ffe734c3e60 R15: 00007ffe734c41c0 [ 26.384698] [ 26.384990] [ 26.385206] Allocated by task 211: [ 26.385631] kasan_save_stack+0x22/0x50 [ 26.386154] kasan_set_track+0x25/0x30 [ 26.386647] __kasan_slab_alloc+0x59/0x70 [ 26.387170] kmem_cache_alloc+0x16b/0x370 [ 26.387693] vm_area_dup+0x20/0x160 [ 26.388157] __split_vma+0x170/0x950 [ 26.388620] split_vma+0xc6/0x110 [ 26.389062] mprotect_fixup+0x8d2/0xb30 [ 26.389563] do_mprotect_pkey+0x87e/0xd40 [ 26.390085] __x64_sys_mprotect+0x78/0xc0 [ 26.390620] do_syscall_64+0x3f/0x90 [ 26.391112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.391751] [ 26.391965] Freed by task 211: [ 26.392356] kasan_save_stack+0x22/0x50 [ 26.392873] kasan_set_track+0x25/0x30 [ 26.393372] kasan_save_free_info+0x2b/0x50 [ 26.393903] __kasan_slab_free+0x10a/0x190 [ 26.394443] kmem_cache_free+0x10d/0x4d0 [ 26.394948] rcu_core+0x8c8/0x2860 [ 26.395392] __do_softirq+0x1b7/0x7d4 [ 26.395867] [ 26.396081] Last potentially related work creation: [ 26.396668] kasan_save_stack+0x22/0x50 [ 26.397168] __kasan_record_aux_stack+0x8e/0xa0 [ 26.397737] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.398394] remove_vma+0x139/0x170 [ 26.398848] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.399407] do_vmi_munmap+0x1f1/0x2b0 [ 26.399894] __vm_munmap+0x138/0x3a0 [ 26.400361] __x64_sys_munmap+0x59/0x80 [ 26.400856] do_syscall_64+0x3f/0x90 [ 26.401329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.401963] [ 26.402188] Second to last potentially related work creation: [ 26.402868] kasan_save_stack+0x22/0x50 [ 26.403375] __kasan_record_aux_stack+0x8e/0xa0 [ 26.403943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.404582] remove_vma+0x139/0x170 [ 26.405037] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.405601] do_vmi_munmap+0x1f1/0x2b0 [ 26.406130] mmap_region+0x1f9/0x2660 [ 26.406609] do_mmap+0x854/0xf00 [ 26.407053] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.407542] ksys_mmap_pgoff+0x3af/0x500 [ 26.408053] do_syscall_64+0x3f/0x90 [ 26.408527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.409177] [ 26.409391] The buggy address belongs to the object at ffff88801680c000 [ 26.409391] which belongs to the cache vm_area_struct of size 168 [ 26.410866] The buggy address is located 88 bytes inside of [ 26.410866] freed 168-byte region [ffff88801680c000, ffff88801680c0a8) [ 26.412269] [ 26.412489] The buggy address belongs to the physical page: [ 26.413149] page:00000000a9e8a387 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1680c [ 26.414249] memcg:ffff888018022b01 [ 26.414679] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.415370] page_type: 0xffffffff() [ 26.415867] raw: 0100000000000200 ffff88800879fc80 ffffea0000317300 000000000000000d [ 26.416819] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018022b01 [ 26.417731] page dumped because: kasan: bad access detected [ 26.418426] [ 26.418647] Memory state around the buggy address: [ 26.419223] ffff88801680bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 26.420145] ffff88801680bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.421025] >ffff88801680c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.421864] ^ [ 26.422599] ffff88801680c080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 26.423444] ffff88801680c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.424286] ================================================================== [ 26.425277] Disabling lock debugging due to kernel taint [ 28.725001] BUG: Bad rss-counter state mm:0000000005eae8fd type:MM_FILEPAGES val:33 [ 28.726073] BUG: Bad rss-counter state mm:0000000005eae8fd type:MM_ANONPAGES val:22 [ 29.218529] BUG: Bad rss-counter state mm:00000000f7a02bb0 type:MM_FILEPAGES val:33 [ 29.220117] BUG: Bad rss-counter state mm:00000000f7a02bb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64435' (ECDSA) to the list of known hosts. 2023/06/19 23:47:28 fuzzer started 2023/06/19 23:47:28 dialing manager at localhost:44161 2023/06/19 23:47:28 checking machine... 2023/06/19 23:47:28 checking revisions... [ 30.004029] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:47:28 testing simple program... [ 30.053667] cgroup: Unknown subsys name 'net' [ 30.156671] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:47:25 Registers: info registers vcpu 0 RAX=ffffffff8614b8a7 RBX=0000000000000001 RCX=ffffffff8614b8a2 RDX=0000000000000000 RSI=0000000000000007 RDI=ffffffff85e0a19c RBP=ffff888010237980 RSP=ffff8880102378b8 R8 =ffffffff8614b878 R9 =ffff888010237968 R10=0000000000038001 R11=0000000000024372 R12=ffff888010237988 R13=ffff888010237970 R14=ffff888010237969 R15=ffff888010237928 RIP=ffffffff81130a6e 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 00007fbef7ac1900 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=00007fbef8078618 CR3=0000000008ed2000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffd6d72c2d8 CR3=000000000de80000 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=2037323a37343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a37343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000