syzkaller login: [ 30.602099] BUG: Bad rss-counter state mm:00000000e9d60d4a type:MM_FILEPAGES val:33 [ 30.603803] BUG: Bad rss-counter state mm:00000000e9d60d4a type:MM_ANONPAGES val:22 [ 30.758969] ================================================================== [ 30.760105] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.761277] Read of size 8 at addr ffff88800e61e5c8 by task sshd/219 [ 30.762288] [ 30.762538] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.763636] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.764618] Call Trace: [ 30.764925] [ 30.765192] dump_stack_lvl+0x91/0xf0 [ 30.765662] print_report+0xcc/0x620 [ 30.766133] ? __virt_addr_valid+0x102/0x340 [ 30.766661] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.767257] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.767867] kasan_report+0xbe/0xf0 [ 30.768323] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768918] vma_interval_tree_remove+0xc75/0xec0 [ 30.769503] vma_prepare+0xc54/0x11a0 [ 30.769959] __split_vma+0x5af/0x950 [ 30.770412] ? __pfx___split_vma+0x10/0x10 [ 30.770924] ? find_held_lock+0x2c/0x110 [ 30.771438] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.771992] ? lock_is_held_type+0x9f/0x120 [ 30.772519] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.773108] ? mtree_range_walk+0x632/0x900 [ 30.773645] ? mas_walk+0x5c7/0x7c0 [ 30.774107] do_vmi_munmap+0x1f1/0x2b0 [ 30.774579] mmap_region+0x1f9/0x2660 [ 30.775055] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.775579] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.776267] ? __pfx_lock_acquire+0x10/0x10 [ 30.776787] ? __pfx_mmap_region+0x10/0x10 [ 30.777291] ? security_mmap_addr+0x7d/0xa0 [ 30.777815] ? get_unmapped_area+0x1f5/0x3f0 [ 30.778342] do_mmap+0x854/0xf00 [ 30.778772] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.779245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.779809] ksys_mmap_pgoff+0x3af/0x500 [ 30.780295] do_syscall_64+0x3f/0x90 [ 30.780766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.781395] RIP: 0033:0x7f810c097d82 [ 30.781839] 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 [ 30.783892] RSP: 002b:00007ffe7a69f838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.784771] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f810c097d82 [ 30.785587] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f810b4d1000 [ 30.786429] RBP: 00007f810b4d1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.787290] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564df98f2f70 [ 30.788121] R13: 00007ffe7a69f850 R14: 00007ffe7a69f880 R15: 00007ffe7a69fbe0 [ 30.788961] [ 30.789245] [ 30.789456] Allocated by task 212: [ 30.789871] kasan_save_stack+0x22/0x50 [ 30.790361] kasan_set_track+0x25/0x30 [ 30.790841] __kasan_slab_alloc+0x59/0x70 [ 30.791367] kmem_cache_alloc+0x16b/0x370 [ 30.791868] vm_area_dup+0x20/0x160 [ 30.792313] __split_vma+0x170/0x950 [ 30.792766] split_vma+0xc6/0x110 [ 30.793189] mprotect_fixup+0x8d2/0xb30 [ 30.793678] do_mprotect_pkey+0x87e/0xd40 [ 30.794182] __x64_sys_mprotect+0x78/0xc0 [ 30.794697] do_syscall_64+0x3f/0x90 [ 30.795156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795787] [ 30.795999] Freed by task 202: [ 30.796388] kasan_save_stack+0x22/0x50 [ 30.796882] kasan_set_track+0x25/0x30 [ 30.797366] kasan_save_free_info+0x2b/0x50 [ 30.797885] __kasan_slab_free+0x10a/0x190 [ 30.798402] kmem_cache_free+0x10d/0x4d0 [ 30.798910] rcu_core+0x8c8/0x2860 [ 30.799349] __do_softirq+0x1b7/0x7d4 [ 30.799815] [ 30.800023] Last potentially related work creation: [ 30.800592] kasan_save_stack+0x22/0x50 [ 30.801080] __kasan_record_aux_stack+0x8e/0xa0 [ 30.801644] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.802253] remove_vma+0x139/0x170 [ 30.802741] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.803290] do_vmi_munmap+0x1f1/0x2b0 [ 30.803770] __vm_munmap+0x138/0x3a0 [ 30.804226] __x64_sys_munmap+0x59/0x80 [ 30.804710] do_syscall_64+0x3f/0x90 [ 30.805174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.805805] [ 30.806015] Second to last potentially related work creation: [ 30.806673] kasan_save_stack+0x22/0x50 [ 30.807160] __kasan_record_aux_stack+0x8e/0xa0 [ 30.807740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.808360] remove_vma+0x139/0x170 [ 30.808800] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.809334] do_vmi_munmap+0x1f1/0x2b0 [ 30.809812] mmap_region+0x1f9/0x2660 [ 30.810274] do_mmap+0x854/0xf00 [ 30.810688] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.811162] ksys_mmap_pgoff+0x3af/0x500 [ 30.811665] do_syscall_64+0x3f/0x90 [ 30.812132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812758] [ 30.812968] The buggy address belongs to the object at ffff88800e61e570 [ 30.812968] which belongs to the cache vm_area_struct of size 168 [ 30.814390] The buggy address is located 88 bytes inside of [ 30.814390] freed 168-byte region [ffff88800e61e570, ffff88800e61e618) [ 30.815761] [ 30.815969] The buggy address belongs to the physical page: [ 30.816615] page:000000000ed7710a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe61e [ 30.817671] memcg:ffff888013e5fc01 [ 30.818087] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.818719] page_type: 0xffffffff() [ 30.819163] raw: 0100000000000200 ffff8880087a0c80 ffffea00003dccc0 dead000000000004 [ 30.820055] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013e5fc01 [ 30.820919] page dumped because: kasan: bad access detected [ 30.821536] [ 30.821744] Memory state around the buggy address: [ 30.822293] ffff88800e61e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.823092] ffff88800e61e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.823905] >ffff88800e61e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.824704] ^ [ 30.825329] ffff88800e61e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.826130] ffff88800e61e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.826926] ================================================================== [ 30.827883] Disabling lock debugging due to kernel taint [ 32.974166] BUG: Bad rss-counter state mm:00000000f235cd76 type:MM_FILEPAGES val:33 [ 32.975284] BUG: Bad rss-counter state mm:00000000f235cd76 type:MM_ANONPAGES val:22 [ 33.513371] BUG: Bad rss-counter state mm:000000004453e4ca type:MM_FILEPAGES val:33 [ 33.514781] BUG: Bad rss-counter state mm:000000004453e4ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11719' (ECDSA) to the list of known hosts. 2023/06/20 21:59:47 fuzzer started 2023/06/20 21:59:47 dialing manager at localhost:36067 2023/06/20 21:59:47 checking machine... 2023/06/20 21:59:47 checking revisions... [ 34.160708] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:59:48 testing simple program... [ 34.219963] cgroup: Unknown subsys name 'net' [ 34.269644] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:59:47 Registers: info registers vcpu 0 RAX=1ffffffff0ff33d8 RBX=000000000000007c RCX=dffffc0000000000 RDX=ffff888016ded1c0 RSI=ffffffff83723c5c RDI=0000000000000005 RBP=000000000000007d RSP=ffff88801a8477c0 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99ec0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff83723c71 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 00007ff63deec900 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=00007ff63e4a3618 CR3=000000000eb90000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f0febe38380 CR3=000000000c5f0000 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=e0d977da4b54b281ea47e6426dbe5d6d XMM02=ec2efd57dc4c00df000000000011b2f8 XMM03=58ceb198fa083e47000000000011b3c8 XMM04=c9f4e4ac551be1ab00000000000ae988 XMM05=758029452642b21d0000000000133688 XMM06=806171799158d9670000000000133080 XMM07=e042d86d42eb936e00000000001222f0 XMM08=58ceb198fa083e47000000000011b3c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000