syzkaller login: [ 35.130776] BUG: Bad rss-counter state mm:00000000e2a7c0c0 type:MM_FILEPAGES val:33 [ 35.132034] BUG: Bad rss-counter state mm:00000000e2a7c0c0 type:MM_ANONPAGES val:22 [ 35.280208] ================================================================== [ 35.281270] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.282381] Read of size 8 at addr ffff88801a115310 by task sshd/221 [ 35.283285] [ 35.283546] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.284550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.285702] Call Trace: [ 35.286085] [ 35.286420] dump_stack_lvl+0x91/0xf0 [ 35.286950] print_report+0xcc/0x620 [ 35.287436] ? __virt_addr_valid+0x102/0x340 [ 35.287981] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.288599] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.289220] kasan_report+0xbe/0xf0 [ 35.289701] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.290312] vma_interval_tree_remove+0xc75/0xec0 [ 35.290905] vma_prepare+0xc54/0x11a0 [ 35.291384] __split_vma+0x5af/0x950 [ 35.291850] ? __pfx___split_vma+0x10/0x10 [ 35.292379] ? find_held_lock+0x2c/0x110 [ 35.292893] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.293455] ? lock_is_held_type+0x9f/0x120 [ 35.294001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.294596] ? mtree_range_walk+0x632/0x900 [ 35.295144] ? mas_walk+0x5c7/0x7c0 [ 35.295611] do_vmi_munmap+0x1f1/0x2b0 [ 35.296099] mmap_region+0x1f9/0x2660 [ 35.296575] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.297084] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.297826] ? __pfx_lock_acquire+0x10/0x10 [ 35.298361] ? __pfx_mmap_region+0x10/0x10 [ 35.298893] ? security_mmap_addr+0x7d/0xa0 [ 35.299419] ? get_unmapped_area+0x1f5/0x3f0 [ 35.299976] do_mmap+0x854/0xf00 [ 35.300420] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.300911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.301482] ksys_mmap_pgoff+0x3af/0x500 [ 35.301989] do_syscall_64+0x3f/0x90 [ 35.302460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.303099] RIP: 0033:0x7fc4fe77ed82 [ 35.303557] 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 [ 35.305696] RSP: 002b:00007ffe54674068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.306589] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4fe77ed82 [ 35.307433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4fdbb8000 [ 35.308286] RBP: 00007fc4fdbb8000 R08: 0000000000000009 R09: 0000000000001000 [ 35.309129] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f3946f980 [ 35.309990] R13: 00007ffe54674080 R14: 00007ffe546740b0 R15: 00007ffe54674410 [ 35.310847] [ 35.311137] [ 35.311350] Allocated by task 214: [ 35.311775] kasan_save_stack+0x22/0x50 [ 35.312270] kasan_set_track+0x25/0x30 [ 35.312757] __kasan_slab_alloc+0x59/0x70 [ 35.313282] kmem_cache_alloc+0x16b/0x370 [ 35.313805] vm_area_dup+0x20/0x160 [ 35.314257] __split_vma+0x170/0x950 [ 35.314720] split_vma+0xc6/0x110 [ 35.315156] mprotect_fixup+0x8d2/0xb30 [ 35.315651] do_mprotect_pkey+0x87e/0xd40 [ 35.316173] __x64_sys_mprotect+0x78/0xc0 [ 35.316696] do_syscall_64+0x3f/0x90 [ 35.317166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.317810] [ 35.318024] Freed by task 214: [ 35.318411] kasan_save_stack+0x22/0x50 [ 35.318914] kasan_set_track+0x25/0x30 [ 35.319406] kasan_save_free_info+0x2b/0x50 [ 35.319934] __kasan_slab_free+0x10a/0x190 [ 35.320458] kmem_cache_free+0x10d/0x4d0 [ 35.320964] rcu_core+0x8c8/0x2860 [ 35.321407] __do_softirq+0x1b7/0x7d4 [ 35.321903] [ 35.322117] Last potentially related work creation: [ 35.322706] kasan_save_stack+0x22/0x50 [ 35.323207] __kasan_record_aux_stack+0x8e/0xa0 [ 35.323785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.324425] remove_vma+0x139/0x170 [ 35.324874] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.325428] do_vmi_munmap+0x1f1/0x2b0 [ 35.325920] __vm_munmap+0x138/0x3a0 [ 35.326385] __x64_sys_munmap+0x59/0x80 [ 35.326873] do_syscall_64+0x3f/0x90 [ 35.327347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.327982] [ 35.328194] The buggy address belongs to the object at ffff88801a1152b8 [ 35.328194] which belongs to the cache vm_area_struct of size 168 [ 35.329667] The buggy address is located 88 bytes inside of [ 35.329667] freed 168-byte region [ffff88801a1152b8, ffff88801a115360) [ 35.331054] [ 35.331267] The buggy address belongs to the physical page: [ 35.331917] page:00000000b82f3a59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a115 [ 35.333007] memcg:ffff888013e4a501 [ 35.333432] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.334090] page_type: 0xffffffff() [ 35.334537] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.335447] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013e4a501 [ 35.336360] page dumped because: kasan: bad access detected [ 35.337014] [ 35.337228] Memory state around the buggy address: [ 35.337811] ffff88801a115200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 35.338650] ffff88801a115280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.339512] >ffff88801a115300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.340354] ^ [ 35.340821] ffff88801a115380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.341681] ffff88801a115400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.342524] ================================================================== [ 35.343630] Disabling lock debugging due to kernel taint [ 37.624447] BUG: Bad rss-counter state mm:0000000020d97e11 type:MM_FILEPAGES val:33 [ 37.625610] BUG: Bad rss-counter state mm:0000000020d97e11 type:MM_ANONPAGES val:22 [ 38.014133] BUG: Bad rss-counter state mm:000000004f03415a type:MM_FILEPAGES val:33 [ 38.015365] BUG: Bad rss-counter state mm:000000004f03415a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2251' (ECDSA) to the list of known hosts. 2023/06/19 17:50:12 fuzzer started 2023/06/19 17:50:12 dialing manager at localhost:44161 2023/06/19 17:50:12 checking machine... 2023/06/19 17:50:12 checking revisions... [ 38.684620] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:50:12 testing simple program... [ 38.727734] cgroup: Unknown subsys name 'net' [ 38.785464] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:50:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f5f8000 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800d967568 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000092cc0 RIP=ffffffff81374466 RFL=00000293 [--S-A-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 00007f99948d6900 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=00007f9993cdf480 CR3=00000000093c2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d1a5ce095c4a545c00000000000ae988 XMM05=20231fdc9c3992a90000000000134cc0 XMM06=c291bd5c70af25b90000000000133ab0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83ab4255 RDX=0000000000000000 RSI=00000000000000fe RDI=00000000000000ff RBP=0000000000000000 RSP=ffff8880147c7500 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000b1900000b19 R12=0000000000000000 R13=00000000000000fe R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c0388 RFL=00000282 [--S----] 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 00007fdd97a6b900 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=00007ffeeb3ae000 CR3=000000000ff2a000 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