syzkaller login: [ 30.167065] BUG: Bad rss-counter state mm:000000008a94592c type:MM_FILEPAGES val:33 [ 30.168325] BUG: Bad rss-counter state mm:000000008a94592c type:MM_ANONPAGES val:22 [ 30.212027] ================================================================== [ 30.213188] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.214340] Read of size 8 at addr ffff88800e637798 by task sshd/220 [ 30.215253] [ 30.215519] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.216563] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.217719] Call Trace: [ 30.218106] [ 30.218445] dump_stack_lvl+0x91/0xf0 [ 30.218916] print_report+0xcc/0x620 [ 30.219459] ? __virt_addr_valid+0x102/0x340 [ 30.220018] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.220794] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.221450] kasan_report+0xbe/0xf0 [ 30.221961] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.222599] vma_interval_tree_remove+0xc75/0xec0 [ 30.223278] vma_prepare+0xc54/0x11a0 [ 30.223786] __split_vma+0x5af/0x950 [ 30.224301] ? __pfx___split_vma+0x10/0x10 [ 30.224874] ? find_held_lock+0x2c/0x110 [ 30.225440] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.226078] ? lock_is_held_type+0x9f/0x120 [ 30.226630] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.227265] ? mtree_range_walk+0x632/0x900 [ 30.227820] ? mas_walk+0x5c7/0x7c0 [ 30.228329] do_vmi_munmap+0x1f1/0x2b0 [ 30.228944] mmap_region+0x1f9/0x2660 [ 30.229441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.229963] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.230683] ? __pfx_lock_acquire+0x10/0x10 [ 30.231218] ? __pfx_mmap_region+0x10/0x10 [ 30.231737] ? security_mmap_addr+0x7d/0xa0 [ 30.232306] ? get_unmapped_area+0x1f5/0x3f0 [ 30.232860] do_mmap+0x854/0xf00 [ 30.233326] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.233850] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.234432] ksys_mmap_pgoff+0x3af/0x500 [ 30.234941] do_syscall_64+0x3f/0x90 [ 30.235421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.236049] RIP: 0033:0x7ff8bb1ebd82 [ 30.236501] 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 [ 30.238616] RSP: 002b:00007ffcce914218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.239528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8bb1ebd82 [ 30.240367] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8ba625000 [ 30.241204] RBP: 00007ff8ba625000 R08: 0000000000000009 R09: 0000000000001000 [ 30.242039] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c466a9ec0 [ 30.242888] R13: 00007ffcce914230 R14: 00007ffcce914260 R15: 00007ffcce9145c0 [ 30.243752] [ 30.244035] [ 30.244262] Allocated by task 213: [ 30.244680] kasan_save_stack+0x22/0x50 [ 30.245183] kasan_set_track+0x25/0x30 [ 30.245665] __kasan_slab_alloc+0x59/0x70 [ 30.246231] kmem_cache_alloc+0x16b/0x370 [ 30.246750] vm_area_dup+0x20/0x160 [ 30.247232] __split_vma+0x170/0x950 [ 30.247702] split_vma+0xc6/0x110 [ 30.248162] mprotect_fixup+0x8d2/0xb30 [ 30.248668] do_mprotect_pkey+0x87e/0xd40 [ 30.249207] __x64_sys_mprotect+0x78/0xc0 [ 30.249748] do_syscall_64+0x3f/0x90 [ 30.250237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.250890] [ 30.251129] Freed by task 213: [ 30.251537] kasan_save_stack+0x22/0x50 [ 30.252049] kasan_set_track+0x25/0x30 [ 30.252563] kasan_save_free_info+0x2b/0x50 [ 30.253110] __kasan_slab_free+0x10a/0x190 [ 30.253651] kmem_cache_free+0x10d/0x4d0 [ 30.254189] rcu_core+0x8c8/0x2860 [ 30.254635] __do_softirq+0x1b7/0x7d4 [ 30.255138] [ 30.255356] Last potentially related work creation: [ 30.255940] kasan_save_stack+0x22/0x50 [ 30.256463] __kasan_record_aux_stack+0x8e/0xa0 [ 30.257039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.257719] remove_vma+0x139/0x170 [ 30.258186] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.258743] do_vmi_munmap+0x1f1/0x2b0 [ 30.259264] __vm_munmap+0x138/0x3a0 [ 30.259740] __x64_sys_munmap+0x59/0x80 [ 30.260259] do_syscall_64+0x3f/0x90 [ 30.260744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.261409] [ 30.261626] The buggy address belongs to the object at ffff88800e637740 [ 30.261626] which belongs to the cache vm_area_struct of size 168 [ 30.263148] The buggy address is located 88 bytes inside of [ 30.263148] freed 168-byte region [ffff88800e637740, ffff88800e6377e8) [ 30.264574] [ 30.264790] The buggy address belongs to the physical page: [ 30.265466] page:000000003840493b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe637 [ 30.266591] memcg:ffff88800e63f501 [ 30.267018] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.267677] page_type: 0xffffffff() [ 30.268159] raw: 0100000000000200 ffff8880087a0c80 ffffea0000396b80 dead000000000004 [ 30.269095] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e63f501 [ 30.270031] page dumped because: kasan: bad access detected [ 30.270710] [ 30.270924] Memory state around the buggy address: [ 30.271519] ffff88800e637680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.272389] ffff88800e637700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.273273] >ffff88800e637780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.274161] ^ [ 30.274657] ffff88800e637800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.275529] ffff88800e637880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.276412] ================================================================== [ 30.277781] Disabling lock debugging due to kernel taint [ 32.442556] BUG: Bad rss-counter state mm:00000000003bdbad type:MM_FILEPAGES val:33 [ 32.443735] BUG: Bad rss-counter state mm:00000000003bdbad type:MM_ANONPAGES val:22 [ 32.870383] BUG: Bad rss-counter state mm:0000000006353be3 type:MM_FILEPAGES val:33 [ 32.871573] BUG: Bad rss-counter state mm:0000000006353be3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23086' (ECDSA) to the list of known hosts. 2023/06/21 06:24:04 fuzzer started 2023/06/21 06:24:04 dialing manager at localhost:36067 2023/06/21 06:24:04 checking machine... 2023/06/21 06:24:04 checking revisions... [ 33.486801] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:24:05 testing simple program... [ 33.536071] cgroup: Unknown subsys name 'net' [ 33.572762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:24:04 Registers: info registers vcpu 0 RAX=0000000000091a5f RBX=0000000000000001 RCX=ffffffff83863b7a RDX=0000000000000001 RSI=ffffffff863ddb42 RDI=ffffffff85fc1340 RBP=ffff8880180479b8 RSP=ffff8880180478e0 R8 =ffffffff863ddb42 R9 =ffff8880180479a0 R10=0000000000038001 R11=0000000000091a5f R12=ffff8880180479c0 R13=ffff8880180479a8 R14=ffff8880180479a1 R15=ffff888018047960 RIP=ffffffff8112fc12 RFL=00000212 [----A--] 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 00007f13c58e1900 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=00007f13c5e98618 CR3=000000000e344000 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=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=00007fd6afde3a70 CR3=0000000015a84000 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=2034303a34323a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a34323a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000