[ 39.765012] BUG: Bad rss-counter state mm:00000000eeac1ac7 type:MM_FILEPAGES val:33 [ 39.766703] BUG: Bad rss-counter state mm:00000000eeac1ac7 type:MM_ANONPAGES val:22 [ 39.923248] ================================================================== [ 39.924220] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.925172] Read of size 8 at addr ffff88800938b5c8 by task sshd/219 [ 39.926051] [ 39.926276] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.927167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.928185] Call Trace: [ 39.928510] [ 39.928803] dump_stack_lvl+0x91/0xf0 [ 39.929307] print_report+0xcc/0x620 [ 39.929797] ? __virt_addr_valid+0x102/0x340 [ 39.930357] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.930980] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.931629] kasan_report+0xbe/0xf0 [ 39.932112] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.932736] vma_interval_tree_remove+0xc75/0xec0 [ 39.933348] vma_prepare+0xc54/0x11a0 [ 39.933835] __split_vma+0x5af/0x950 [ 39.934317] ? __pfx___split_vma+0x10/0x10 [ 39.934864] ? find_held_lock+0x2c/0x110 [ 39.935418] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.935991] ? lock_is_held_type+0x9f/0x120 [ 39.936536] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.937154] ? mtree_range_walk+0x632/0x900 [ 39.937720] ? mas_walk+0x5c7/0x7c0 [ 39.938200] do_vmi_munmap+0x1f1/0x2b0 [ 39.938697] mmap_region+0x1f9/0x2660 [ 39.939197] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.939721] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.940441] ? __pfx_lock_acquire+0x10/0x10 [ 39.940988] ? __pfx_mmap_region+0x10/0x10 [ 39.941525] ? security_mmap_addr+0x7d/0xa0 [ 39.942063] ? get_unmapped_area+0x1f5/0x3f0 [ 39.942625] do_mmap+0x854/0xf00 [ 39.943101] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.943603] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.944170] ksys_mmap_pgoff+0x3af/0x500 [ 39.944696] do_syscall_64+0x3f/0x90 [ 39.945179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.945842] RIP: 0033:0x7f4503e75d82 [ 39.946311] 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 [ 39.948502] RSP: 002b:00007ffedf44e328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.949437] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4503e75d82 [ 39.950281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45032af000 [ 39.951175] RBP: 00007f45032af000 R08: 0000000000000009 R09: 0000000000001000 [ 39.952042] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed9d924b20 [ 39.952899] R13: 00007ffedf44e340 R14: 00007ffedf44e370 R15: 00007ffedf44e6d0 [ 39.953753] [ 39.954043] [ 39.954262] Allocated by task 211: [ 39.954690] kasan_save_stack+0x22/0x50 [ 39.955206] kasan_set_track+0x25/0x30 [ 39.955706] __kasan_slab_alloc+0x59/0x70 [ 39.956233] kmem_cache_alloc+0x16b/0x370 [ 39.956761] vm_area_dup+0x20/0x160 [ 39.957221] __split_vma+0x170/0x950 [ 39.957695] split_vma+0xc6/0x110 [ 39.958143] mprotect_fixup+0x8d2/0xb30 [ 39.958650] do_mprotect_pkey+0x87e/0xd40 [ 39.959194] __x64_sys_mprotect+0x78/0xc0 [ 39.959727] do_syscall_64+0x3f/0x90 [ 39.960205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.960866] [ 39.961084] Freed by task 211: [ 39.961484] kasan_save_stack+0x22/0x50 [ 39.961991] kasan_set_track+0x25/0x30 [ 39.962489] kasan_save_free_info+0x2b/0x50 [ 39.963029] __kasan_slab_free+0x10a/0x190 [ 39.963581] kmem_cache_free+0x10d/0x4d0 [ 39.964100] rcu_core+0x8c8/0x2860 [ 39.964554] __do_softirq+0x1b7/0x7d4 [ 39.965040] [ 39.965258] Last potentially related work creation: [ 39.965881] kasan_save_stack+0x22/0x50 [ 39.966398] __kasan_record_aux_stack+0x8e/0xa0 [ 39.966986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.967648] remove_vma+0x139/0x170 [ 39.968105] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.968661] do_vmi_munmap+0x1f1/0x2b0 [ 39.969159] __vm_munmap+0x138/0x3a0 [ 39.969635] __x64_sys_munmap+0x59/0x80 [ 39.970144] do_syscall_64+0x3f/0x90 [ 39.970626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.971276] [ 39.971495] The buggy address belongs to the object at ffff88800938b570 [ 39.971495] which belongs to the cache vm_area_struct of size 168 [ 39.972969] The buggy address is located 88 bytes inside of [ 39.972969] freed 168-byte region [ffff88800938b570, ffff88800938b618) [ 39.974383] [ 39.974606] The buggy address belongs to the physical page: [ 39.975303] page:00000000d07b02fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x938b [ 39.976399] memcg:ffff88800d2cce01 [ 39.976838] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.977560] page_type: 0xffffffff() [ 39.978014] raw: 0100000000000200 ffff88800879fc80 ffffea00003a3140 dead000000000009 [ 39.978945] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2cce01 [ 39.979917] page dumped because: kasan: bad access detected [ 39.980598] [ 39.980817] Memory state around the buggy address: [ 39.981396] ffff88800938b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.982251] ffff88800938b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 39.983130] >ffff88800938b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.983989] ^ [ 39.984661] ffff88800938b600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 39.985532] ffff88800938b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.986382] ================================================================== [ 39.987378] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.992430] BUG: Bad rss-counter state mm:00000000b52f4dec type:MM_FILEPAGES val:33 [ 41.993648] BUG: Bad rss-counter state mm:00000000b52f4dec type:MM_ANONPAGES val:22 [ 42.404935] BUG: Bad rss-counter state mm:000000005cf1084e type:MM_FILEPAGES val:33 [ 42.406132] BUG: Bad rss-counter state mm:000000005cf1084e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10642' (ECDSA) to the list of known hosts. 2023/06/20 05:30:43 fuzzer started 2023/06/20 05:30:44 dialing manager at localhost:44161 2023/06/20 05:30:44 checking machine... 2023/06/20 05:30:44 checking revisions... [ 43.108841] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:30:44 testing simple program... [ 43.155922] cgroup: Unknown subsys name 'net' [ 43.196093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:30:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffdd145fb28 CR3=0000000005482000 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=00007ff47a772510000055877573a790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e134e RSI=ffffffff83c22ffc RDI=ffff88806cf09a70 RBP=ffff88806cf09b08 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000008b93b R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88800e719b40 R15=ffff88806cf09a70 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007faa7a9e8700 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=00007f92eca01f20 CR3=000000000d9b2000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033343a3033 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303833 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000