syzkaller login: [ 31.079640] BUG: Bad rss-counter state mm:000000008b195f8c type:MM_FILEPAGES val:33 [ 31.081495] BUG: Bad rss-counter state mm:000000008b195f8c type:MM_ANONPAGES val:22 [ 31.242386] ================================================================== [ 31.243306] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.244245] Read of size 8 at addr ffff88801681d968 by task sshd/220 [ 31.245005] [ 31.245222] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.246183] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.247161] Call Trace: [ 31.247521] <TASK> [ 31.247805] dump_stack_lvl+0x91/0xf0 [ 31.248312] print_report+0xcc/0x620 [ 31.248802] ? __virt_addr_valid+0x102/0x340 [ 31.249360] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249976] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.250593] kasan_report+0xbe/0xf0 [ 31.251083] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.251716] vma_interval_tree_remove+0xc75/0xec0 [ 31.252341] vma_prepare+0xc54/0x11a0 [ 31.252846] __split_vma+0x5af/0x950 [ 31.253332] ? __pfx___split_vma+0x10/0x10 [ 31.253885] ? find_held_lock+0x2c/0x110 [ 31.254433] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.255020] ? lock_is_held_type+0x9f/0x120 [ 31.255591] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.256228] ? mtree_range_walk+0x632/0x900 [ 31.256809] ? mas_walk+0x5c7/0x7c0 [ 31.257309] do_vmi_munmap+0x1f1/0x2b0 [ 31.257821] mmap_region+0x1f9/0x2660 [ 31.258320] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.258846] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.259599] ? __pfx_lock_acquire+0x10/0x10 [ 31.260154] ? __pfx_mmap_region+0x10/0x10 [ 31.260699] ? security_mmap_addr+0x7d/0xa0 [ 31.261237] ? get_unmapped_area+0x1f5/0x3f0 [ 31.261806] do_mmap+0x854/0xf00 [ 31.262263] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.262785] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.263377] ksys_mmap_pgoff+0x3af/0x500 [ 31.263905] do_syscall_64+0x3f/0x90 [ 31.264401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265078] RIP: 0033:0x7feae39f2d82 [ 31.265551] 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 [ 31.267789] RSP: 002b:00007ffd04296928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.268744] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feae39f2d82 [ 31.269626] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feae2e2c000 [ 31.270513] RBP: 00007feae2e2c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.271408] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f194301ec0 [ 31.272287] R13: 00007ffd04296940 R14: 00007ffd04296970 R15: 00007ffd04296cd0 [ 31.273169] </TASK> [ 31.273473] [ 31.273694] Allocated by task 213: [ 31.274142] kasan_save_stack+0x22/0x50 [ 31.274661] kasan_set_track+0x25/0x30 [ 31.275174] __kasan_slab_alloc+0x59/0x70 [ 31.275744] kmem_cache_alloc+0x16b/0x370 [ 31.276282] vm_area_dup+0x20/0x160 [ 31.276757] __split_vma+0x170/0x950 [ 31.277242] split_vma+0xc6/0x110 [ 31.277700] mprotect_fixup+0x8d2/0xb30 [ 31.278219] do_mprotect_pkey+0x87e/0xd40 [ 31.278761] __x64_sys_mprotect+0x78/0xc0 [ 31.279310] do_syscall_64+0x3f/0x90 [ 31.279807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.280491] [ 31.280717] Freed by task 213: [ 31.281124] kasan_save_stack+0x22/0x50 [ 31.281654] kasan_set_track+0x25/0x30 [ 31.282159] kasan_save_free_info+0x2b/0x50 [ 31.282720] __kasan_slab_free+0x10a/0x190 [ 31.283283] kmem_cache_free+0x10d/0x4d0 [ 31.283809] rcu_core+0x8c8/0x2860 [ 31.284278] __do_softirq+0x1b7/0x7d4 [ 31.284773] [ 31.284992] Last potentially related work creation: [ 31.285603] kasan_save_stack+0x22/0x50 [ 31.286127] __kasan_record_aux_stack+0x8e/0xa0 [ 31.286729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.287421] remove_vma+0x139/0x170 [ 31.287889] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.288462] do_vmi_munmap+0x1f1/0x2b0 [ 31.288969] __vm_munmap+0x138/0x3a0 [ 31.289452] __x64_sys_munmap+0x59/0x80 [ 31.289967] do_syscall_64+0x3f/0x90 [ 31.290459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.291128] [ 31.291356] The buggy address belongs to the object at ffff88801681d910 [ 31.291356] which belongs to the cache vm_area_struct of size 168 [ 31.292893] The buggy address is located 88 bytes inside of [ 31.292893] freed 168-byte region [ffff88801681d910, ffff88801681d9b8) [ 31.294360] [ 31.294582] The buggy address belongs to the physical page: [ 31.295289] page:0000000000eebf0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1681d [ 31.296445] memcg:ffff88800c518c01 [ 31.296884] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.297559] page_type: 0xffffffff() [ 31.298027] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.298980] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c518c01 [ 31.299947] page dumped because: kasan: bad access detected [ 31.300632] [ 31.300859] Memory state around the buggy address: [ 31.301461] ffff88801681d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.302359] ffff88801681d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.303281] >ffff88801681d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.304177] ^ [ 31.304987] ffff88801681d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.305889] ffff88801681da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.306779] ================================================================== [ 31.307896] Disabling lock debugging due to kernel taint [ 33.355088] BUG: Bad rss-counter state mm:00000000626d1e1a type:MM_FILEPAGES val:33 [ 33.356635] BUG: Bad rss-counter state mm:00000000626d1e1a type:MM_ANONPAGES val:22 [ 33.723600] BUG: Bad rss-counter state mm:00000000972376cb type:MM_FILEPAGES val:33 [ 33.725244] BUG: Bad rss-counter state mm:00000000972376cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46730' (ECDSA) to the list of known hosts. 2023/06/20 11:44:00 fuzzer started 2023/06/20 11:44:00 dialing manager at localhost:36067 2023/06/20 11:44:00 checking machine... 2023/06/20 11:44:00 checking revisions... [ 34.418347] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:44:00 testing simple program... [ 34.472685] cgroup: Unknown subsys name 'net' [ 34.538230] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:44:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180effe RCX=ffffffff86138e01 RDX=1ffff11001d68f43 RSI=0000000000000000 RDI=ffffffff8180effe RBP=ffffffff8180effe RSP=ffff88800eb47970 R8 =ffffffff86138e90 R9 =ffff88800eb47a00 R10=0000000000038001 R11=0000000000020d8f R12=0000000000000001 R13=0000000000000000 R14=ffff8880166851c0 R15=ffff888015f01680 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007f068a31c900 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=00007f068a8d40b0 CR3=000000000e236000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005600746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 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=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=00007ffffdc80fe8 CR3=0000000009522000 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=2030303a34343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a33343a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000