syzkaller login: [ 96.297497] BUG: Bad rss-counter state mm:00000000bca6ca51 type:MM_FILEPAGES val:33 [ 96.298731] BUG: Bad rss-counter state mm:00000000bca6ca51 type:MM_ANONPAGES val:22 [ 96.333789] ================================================================== [ 96.334784] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 96.335780] Read of size 8 at addr ffff88801a8b83f8 by task sshd/221 [ 96.336571] [ 96.336795] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 96.337855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 96.338861] Call Trace: [ 96.339183] [ 96.339481] dump_stack_lvl+0x91/0xf0 [ 96.339975] print_report+0xcc/0x620 [ 96.340503] ? __virt_addr_valid+0x102/0x340 [ 96.341062] ? vma_interval_tree_remove+0xc75/0xec0 [ 96.341690] ? vma_interval_tree_remove+0xc75/0xec0 [ 96.342309] kasan_report+0xbe/0xf0 [ 96.342787] ? vma_interval_tree_remove+0xc75/0xec0 [ 96.343434] vma_interval_tree_remove+0xc75/0xec0 [ 96.344038] vma_prepare+0xc54/0x11a0 [ 96.344534] __split_vma+0x5af/0x950 [ 96.345007] ? __pfx___split_vma+0x10/0x10 [ 96.345658] ? find_held_lock+0x2c/0x110 [ 96.346218] do_vmi_align_munmap+0x2ba/0x11f0 [ 96.346791] ? lock_is_held_type+0x9f/0x120 [ 96.347324] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 96.347939] ? mtree_range_walk+0x632/0x900 [ 96.348530] ? mas_walk+0x5c7/0x7c0 [ 96.349022] do_vmi_munmap+0x1f1/0x2b0 [ 96.349523] mmap_region+0x1f9/0x2660 [ 96.350011] ? vm_mmap_pgoff+0x15c/0x3a0 [ 96.350532] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 96.351253] ? __pfx_lock_acquire+0x10/0x10 [ 96.351789] ? __pfx_mmap_region+0x10/0x10 [ 96.352335] ? security_mmap_addr+0x7d/0xa0 [ 96.352870] ? get_unmapped_area+0x1f5/0x3f0 [ 96.353421] do_mmap+0x854/0xf00 [ 96.353869] vm_mmap_pgoff+0x1a6/0x3a0 [ 96.354375] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 96.354941] ksys_mmap_pgoff+0x3af/0x500 [ 96.355454] do_syscall_64+0x3f/0x90 [ 96.355937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 96.356608] RIP: 0033:0x7efd02628d82 [ 96.357072] 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 [ 96.359202] RSP: 002b:00007ffd29b8ea08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 96.360110] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd02628d82 [ 96.360983] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd01a62000 [ 96.361836] RBP: 00007efd01a62000 R08: 0000000000000009 R09: 0000000000001000 [ 96.362696] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7af2c9ec0 [ 96.363541] R13: 00007ffd29b8ea20 R14: 00007ffd29b8ea50 R15: 00007ffd29b8edb0 [ 96.364425] [ 96.364720] [ 96.364942] Allocated by task 214: [ 96.365384] kasan_save_stack+0x22/0x50 [ 96.365892] kasan_set_track+0x25/0x30 [ 96.366396] __kasan_slab_alloc+0x59/0x70 [ 96.366927] kmem_cache_alloc+0x16b/0x370 [ 96.367449] vm_area_dup+0x20/0x160 [ 96.367905] __split_vma+0x170/0x950 [ 96.368405] split_vma+0xc6/0x110 [ 96.368851] mprotect_fixup+0x8d2/0xb30 [ 96.369361] do_mprotect_pkey+0x87e/0xd40 [ 96.369888] __x64_sys_mprotect+0x78/0xc0 [ 96.370418] do_syscall_64+0x3f/0x90 [ 96.370900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 96.371557] [ 96.371781] Freed by task 214: [ 96.372173] kasan_save_stack+0x22/0x50 [ 96.372691] kasan_set_track+0x25/0x30 [ 96.373201] kasan_save_free_info+0x2b/0x50 [ 96.373738] __kasan_slab_free+0x10a/0x190 [ 96.374281] kmem_cache_free+0x10d/0x4d0 [ 96.374801] rcu_core+0x8c8/0x2860 [ 96.375251] __do_softirq+0x1b7/0x7d4 [ 96.375736] [ 96.375951] Last potentially related work creation: [ 96.376542] kasan_save_stack+0x22/0x50 [ 96.377052] __kasan_record_aux_stack+0x8e/0xa0 [ 96.377627] __call_rcu_common.constprop.0+0x6a/0xb90 [ 96.378282] remove_vma+0x139/0x170 [ 96.378729] do_vmi_align_munmap+0xd4a/0x11f0 [ 96.379291] do_vmi_munmap+0x1f1/0x2b0 [ 96.379778] __vm_munmap+0x138/0x3a0 [ 96.380256] __x64_sys_munmap+0x59/0x80 [ 96.380794] do_syscall_64+0x3f/0x90 [ 96.381272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 96.381915] [ 96.382130] The buggy address belongs to the object at ffff88801a8b83a0 [ 96.382130] which belongs to the cache vm_area_struct of size 168 [ 96.383590] The buggy address is located 88 bytes inside of [ 96.383590] freed 168-byte region [ffff88801a8b83a0, ffff88801a8b8448) [ 96.384992] [ 96.385212] The buggy address belongs to the physical page: [ 96.385869] page:00000000269648ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a8b8 [ 96.386959] memcg:ffff88801a8bb101 [ 96.387388] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 96.388091] page_type: 0xffffffff() [ 96.388563] raw: 0100000000000200 ffff88800879fc80 0000000000000000 0000000000000001 [ 96.389496] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a8bb101 [ 96.390408] page dumped because: kasan: bad access detected [ 96.391078] [ 96.391294] Memory state around the buggy address: [ 96.391878] ffff88801a8b8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 96.392740] ffff88801a8b8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 96.393602] >ffff88801a8b8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 96.394464] ^ [ 96.395318] ffff88801a8b8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 96.396180] ffff88801a8b8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 96.397071] ================================================================== [ 96.398295] Disabling lock debugging due to kernel taint [ 97.628593] BUG: Bad rss-counter state mm:00000000af896958 type:MM_FILEPAGES val:33 [ 97.629492] BUG: Bad rss-counter state mm:00000000af896958 type:MM_ANONPAGES val:22 [ 98.131489] BUG: Bad rss-counter state mm:0000000071e55c84 type:MM_FILEPAGES val:33 [ 98.132484] BUG: Bad rss-counter state mm:0000000071e55c84 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41052' (ECDSA) to the list of known hosts. 2023/06/19 13:29:04 fuzzer started 2023/06/19 13:29:04 dialing manager at localhost:44161 2023/06/19 13:29:04 checking machine... 2023/06/19 13:29:04 checking revisions... [ 98.755264] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:29:04 testing simple program... [ 98.800189] cgroup: Unknown subsys name 'net' [ 98.838005] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:27:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=1ffffffff0aca531 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880158f78e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f8878bea477 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000cc0 RIP=ffffffff814c844b 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 00007f88786f7900 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=00007f8878cac650 CR3=0000000019768000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86141d62 RDX=1ffff11001b15f38 RSI=ffff88800d8afe28 RDI=ffff88800d8af9c0 RBP=ffff88800d8afe28 RSP=ffff88800d8af928 R8 =0000000000000001 R9 =ffff88800d8afa00 R10=0000000000038001 R11=0000000000022999 R12=0000000000000008 R13=ffff88800d8afa08 R14=ffff88800d8afe28 R15=ffff88800d8af9c0 RIP=ffffffff8113040e 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 00007f1b551e1900 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=00007f1b54677e20 CR3=000000000d5f6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5d6a7247a7935fdc00000000000ae988 XMM05=628cfe0cd0ae662b000000000013df78 XMM06=c291bd5c70af25b9000000000013cd68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000