syzkaller login: [ 68.128928] BUG: Bad rss-counter state mm:000000007f5a68e4 type:MM_FILEPAGES val:33 [ 68.130985] BUG: Bad rss-counter state mm:000000007f5a68e4 type:MM_ANONPAGES val:22 [ 68.307417] ================================================================== [ 68.308643] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.310035] Read of size 8 at addr ffff88800e583a50 by task sshd/220 [ 68.311101] [ 68.311395] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 68.312567] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.313868] Call Trace: [ 68.314297] [ 68.314708] dump_stack_lvl+0x91/0xf0 [ 68.315338] print_report+0xcc/0x620 [ 68.315834] ? __virt_addr_valid+0x102/0x340 [ 68.316385] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.316994] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.317598] kasan_report+0xbe/0xf0 [ 68.318072] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.318705] vma_interval_tree_remove+0xc75/0xec0 [ 68.319314] vma_prepare+0xc54/0x11a0 [ 68.319790] __split_vma+0x5af/0x950 [ 68.320257] ? __pfx___split_vma+0x10/0x10 [ 68.320779] ? find_held_lock+0x2c/0x110 [ 68.321295] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.321858] ? lock_is_held_type+0x9f/0x120 [ 68.322391] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.323022] ? mtree_range_walk+0x632/0x900 [ 68.323569] ? mas_walk+0x5c7/0x7c0 [ 68.324042] do_vmi_munmap+0x1f1/0x2b0 [ 68.324532] mmap_region+0x1f9/0x2660 [ 68.325011] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.325517] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.326216] ? __pfx_lock_acquire+0x10/0x10 [ 68.326755] ? __pfx_mmap_region+0x10/0x10 [ 68.327272] ? security_mmap_addr+0x7d/0xa0 [ 68.327797] ? get_unmapped_area+0x1f5/0x3f0 [ 68.328341] do_mmap+0x854/0xf00 [ 68.328773] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.329271] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.329832] ksys_mmap_pgoff+0x3af/0x500 [ 68.330337] do_syscall_64+0x3f/0x90 [ 68.330814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.331454] RIP: 0033:0x7ff4d304dd82 [ 68.331913] 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 [ 68.333997] RSP: 002b:00007ffdea488018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.334906] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4d304dd82 [ 68.335745] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4d2487000 [ 68.336623] RBP: 00007ff4d2487000 R08: 0000000000000009 R09: 0000000000001000 [ 68.337610] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636fc66aec0 [ 68.338600] R13: 00007ffdea488030 R14: 00007ffdea488060 R15: 00007ffdea4883c0 [ 68.339595] [ 68.339935] [ 68.340187] Allocated by task 213: [ 68.340683] kasan_save_stack+0x22/0x50 [ 68.341266] kasan_set_track+0x25/0x30 [ 68.341835] __kasan_slab_alloc+0x59/0x70 [ 68.342450] kmem_cache_alloc+0x16b/0x370 [ 68.343050] vm_area_dup+0x20/0x160 [ 68.343574] __split_vma+0x170/0x950 [ 68.344116] split_vma+0xc6/0x110 [ 68.344624] mprotect_fixup+0x8d2/0xb30 [ 68.345207] do_mprotect_pkey+0x87e/0xd40 [ 68.345813] __x64_sys_mprotect+0x78/0xc0 [ 68.346437] do_syscall_64+0x3f/0x90 [ 68.346991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.347741] [ 68.347990] Freed by task 213: [ 68.348450] kasan_save_stack+0x22/0x50 [ 68.349035] kasan_set_track+0x25/0x30 [ 68.349608] kasan_save_free_info+0x2b/0x50 [ 68.350216] __kasan_slab_free+0x10a/0x190 [ 68.350833] kmem_cache_free+0x10d/0x4d0 [ 68.351493] rcu_core+0x8c8/0x2860 [ 68.352000] __do_softirq+0x1b7/0x7d4 [ 68.352546] [ 68.352790] Last potentially related work creation: [ 68.353460] kasan_save_stack+0x22/0x50 [ 68.354040] __kasan_record_aux_stack+0x8e/0xa0 [ 68.354719] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.355457] remove_vma+0x139/0x170 [ 68.355974] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.356608] do_vmi_munmap+0x1f1/0x2b0 [ 68.357170] __vm_munmap+0x138/0x3a0 [ 68.357712] __x64_sys_munmap+0x59/0x80 [ 68.358285] do_syscall_64+0x3f/0x90 [ 68.358860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.359598] [ 68.359843] The buggy address belongs to the object at ffff88800e5839f8 [ 68.359843] which belongs to the cache vm_area_struct of size 168 [ 68.361525] The buggy address is located 88 bytes inside of [ 68.361525] freed 168-byte region [ffff88800e5839f8, ffff88800e583aa0) [ 68.363119] [ 68.363366] The buggy address belongs to the physical page: [ 68.364124] page:000000005a16df7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe583 [ 68.365356] memcg:ffff888009ec9301 [ 68.365843] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.366605] page_type: 0xffffffff() [ 68.367112] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 68.368156] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ec9301 [ 68.369186] page dumped because: kasan: bad access detected [ 68.369941] [ 68.370183] Memory state around the buggy address: [ 68.370855] ffff88800e583900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.371837] ffff88800e583980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 68.372816] >ffff88800e583a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.373787] ^ [ 68.374597] ffff88800e583a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 68.375559] ffff88800e583b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.376522] ================================================================== [ 68.377563] Disabling lock debugging due to kernel taint [ 71.074101] BUG: Bad rss-counter state mm:00000000acea5d6e type:MM_FILEPAGES val:33 [ 71.075145] BUG: Bad rss-counter state mm:00000000acea5d6e type:MM_ANONPAGES val:22 [ 71.552895] BUG: Bad rss-counter state mm:00000000c8164a8b type:MM_FILEPAGES val:33 [ 71.553822] BUG: Bad rss-counter state mm:00000000c8164a8b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63256' (ECDSA) to the list of known hosts. 2023/06/19 19:54:01 fuzzer started 2023/06/19 19:54:02 dialing manager at localhost:44161 2023/06/19 19:54:02 checking machine... 2023/06/19 19:54:02 checking revisions... [ 72.235914] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:54:02 testing simple program... [ 72.286511] cgroup: Unknown subsys name 'net' [ 72.330769] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:53:54 Registers: info registers vcpu 0 RAX=ffffffff852beb10 RBX=1ffff1100285ced8 RCX=1ffffffff0a57d6b RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff852beb58 RBP=ffff88800a0c51c0 RSP=ffff8880142e7680 R8 =ffff88800a0c51d8 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000083 R13=ffff88800a0c5ad0 R14=ffff88800a0c51d4 R15=0000000000000000 RIP=ffffffff8124d9d8 RFL=00000046 [---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 00007fb7398eb900 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=00007fb738d5bd20 CR3=000000000f020000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f805aef7d1f65d4200000000000ae988 XMM05=e63029d4f55201a50000000000135898 XMM06=4fda316b135da52b0000000000134688 XMM07=fb795ef6d65770560000000000124bf8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801819fa00 RCX=0000000000000001 RDX=1ffff11003033f40 RSI=ffff88801819fcd8 RDI=ffff88801819fa00 RBP=ffff88801819fa98 RSP=ffff88801819f9e8 R8 =0000000000000001 R9 =ffff88801819fa40 R10=0000000000038001 R11=0000000000020cf8 R12=ffff88801819fac8 R13=0000000000000000 R14=ffff88800e6c51c0 R15=ffff88800e15be40 RIP=ffffffff8113035a 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 00007f86bcf93900 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=00007ffdef090000 CR3=000000000e626000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000