syzkaller login: [ 30.090162] BUG: Bad rss-counter state mm:00000000e98d7ab1 type:MM_FILEPAGES val:33 [ 30.091163] BUG: Bad rss-counter state mm:00000000e98d7ab1 type:MM_ANONPAGES val:22 [ 30.251493] ================================================================== [ 30.252443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.253385] Read of size 8 at addr ffff888019db94e0 by task sshd/220 [ 30.254201] [ 30.254427] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.255443] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.256476] Call Trace: [ 30.256811] [ 30.257110] dump_stack_lvl+0x91/0xf0 [ 30.257608] print_report+0xcc/0x620 [ 30.258092] ? __virt_addr_valid+0x102/0x340 [ 30.258648] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.259270] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.259911] kasan_report+0xbe/0xf0 [ 30.260387] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.261008] vma_interval_tree_remove+0xc75/0xec0 [ 30.261654] vma_prepare+0xc54/0x11a0 [ 30.262147] __split_vma+0x5af/0x950 [ 30.262627] ? __pfx___split_vma+0x10/0x10 [ 30.263179] ? find_held_lock+0x2c/0x110 [ 30.263732] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.264305] ? lock_is_held_type+0x9f/0x120 [ 30.264850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.265454] ? mtree_range_walk+0x632/0x900 [ 30.266015] ? mas_walk+0x5c7/0x7c0 [ 30.266495] do_vmi_munmap+0x1f1/0x2b0 [ 30.266988] mmap_region+0x1f9/0x2660 [ 30.267474] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.268014] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.268788] ? __pfx_lock_acquire+0x10/0x10 [ 30.269339] ? __pfx_mmap_region+0x10/0x10 [ 30.269887] ? security_mmap_addr+0x7d/0xa0 [ 30.270435] ? get_unmapped_area+0x1f5/0x3f0 [ 30.270997] do_mmap+0x854/0xf00 [ 30.271443] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.271949] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.272513] ksys_mmap_pgoff+0x3af/0x500 [ 30.273027] do_syscall_64+0x3f/0x90 [ 30.273514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.274168] RIP: 0033:0x7f09184aad82 [ 30.274632] 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 [ 30.276785] RSP: 002b:00007ffcb281d468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.277702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09184aad82 [ 30.278555] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09178e4000 [ 30.279416] RBP: 00007f09178e4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.280286] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e26bb0ec0 [ 30.281141] R13: 00007ffcb281d480 R14: 00007ffcb281d4b0 R15: 00007ffcb281d810 [ 30.281999] [ 30.282298] [ 30.282515] Allocated by task 213: [ 30.282951] kasan_save_stack+0x22/0x50 [ 30.283465] kasan_set_track+0x25/0x30 [ 30.283971] __kasan_slab_alloc+0x59/0x70 [ 30.284502] kmem_cache_alloc+0x16b/0x370 [ 30.285016] vm_area_dup+0x20/0x160 [ 30.285471] __split_vma+0x170/0x950 [ 30.285933] split_vma+0xc6/0x110 [ 30.286377] mprotect_fixup+0x8d2/0xb30 [ 30.286879] do_mprotect_pkey+0x87e/0xd40 [ 30.287401] __x64_sys_mprotect+0x78/0xc0 [ 30.287942] do_syscall_64+0x3f/0x90 [ 30.288418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.289071] [ 30.289285] Freed by task 213: [ 30.289681] kasan_save_stack+0x22/0x50 [ 30.290186] kasan_set_track+0x25/0x30 [ 30.290679] kasan_save_free_info+0x2b/0x50 [ 30.291216] __kasan_slab_free+0x10a/0x190 [ 30.291756] kmem_cache_free+0x10d/0x4d0 [ 30.292267] rcu_core+0x8c8/0x2860 [ 30.292717] __do_softirq+0x1b7/0x7d4 [ 30.293202] [ 30.293420] Last potentially related work creation: [ 30.294009] kasan_save_stack+0x22/0x50 [ 30.294512] __kasan_record_aux_stack+0x8e/0xa0 [ 30.295086] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.295739] remove_vma+0x139/0x170 [ 30.296205] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.296767] do_vmi_munmap+0x1f1/0x2b0 [ 30.297255] __vm_munmap+0x138/0x3a0 [ 30.297726] __x64_sys_munmap+0x59/0x80 [ 30.298227] do_syscall_64+0x3f/0x90 [ 30.298711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.299370] [ 30.299603] The buggy address belongs to the object at ffff888019db9488 [ 30.299603] which belongs to the cache vm_area_struct of size 168 [ 30.301081] The buggy address is located 88 bytes inside of [ 30.301081] freed 168-byte region [ffff888019db9488, ffff888019db9530) [ 30.302515] [ 30.302734] The buggy address belongs to the physical page: [ 30.303394] page:00000000f10635a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19db9 [ 30.304528] memcg:ffff88800c4ae301 [ 30.304960] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.305634] page_type: 0xffffffff() [ 30.306104] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.307069] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4ae301 [ 30.308042] page dumped because: kasan: bad access detected [ 30.308728] [ 30.308949] Memory state around the buggy address: [ 30.309537] ffff888019db9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.310406] ffff888019db9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.311254] >ffff888019db9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.312130] ^ [ 30.312886] ffff888019db9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.313758] ffff888019db9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.314611] ================================================================== [ 30.315762] Disabling lock debugging due to kernel taint [ 32.579842] BUG: Bad rss-counter state mm:00000000ddd40bd3 type:MM_FILEPAGES val:33 [ 32.580654] BUG: Bad rss-counter state mm:00000000ddd40bd3 type:MM_ANONPAGES val:22 [ 32.975661] BUG: Bad rss-counter state mm:00000000ecce6c75 type:MM_FILEPAGES val:33 [ 32.976427] BUG: Bad rss-counter state mm:00000000ecce6c75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49584' (ECDSA) to the list of known hosts. 2023/06/21 01:02:10 fuzzer started 2023/06/21 01:02:11 dialing manager at localhost:36067 2023/06/21 01:02:11 checking machine... 2023/06/21 01:02:11 checking revisions... [ 33.579126] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:02:11 testing simple program... [ 33.632829] cgroup: Unknown subsys name 'net' [ 33.703972] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:02:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a50 RCX=0000000000000001 RDX=1ffff1100d9c134b RSI=ffff8880146aff38 RDI=ffff88806ce09a58 RBP=ffff8880146aff38 RSP=ffff88806ce099a8 R8 =ffffffff863b444c R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000008abe0 R12=0000000000000008 R13=ffff88806ce09a98 R14=ffff8880146aff40 R15=ffff88806ce09a50 RIP=ffffffff81130445 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 00007f60c4f4b900 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=00007f60c4390550 CR3=000000000c980000 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=137794b52bcadba6644c2b0c6d313148 XMM02=000000000011a3e8d59e07bde36eea69 XMM03=000000000011a510ec2efd57dc4c00df XMM04=981fce857d9c570b00000000000ae988 XMM05=7bd728ef38535f720000000000132678 XMM06=4fda316b135da52b0000000000131718 XMM07=fb795ef6d657705600000000001219b0 XMM08=2c67c8bc2e329bc3000000000011a510 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100190071d RBX=ffff88800c8038b8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c8038c8 RBP=ffff888015853000 RSP=ffff888017ea7888 R8 =0000000000000001 R9 =ffffed1002fd4f05 R10=0000000000000003 R11=ff00545000000000 R12=dffffc0000000000 R13=ffff888015808000 R14=ffffffff8367562f R15=00000000000000e8 RIP=ffffffff818464b7 RFL=00000006 [-----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 00007f467d63c900 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=00007fff05e74000 CR3=000000000cb66000 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