syzkaller login: [ 29.775520] BUG: Bad rss-counter state mm:000000008859b75a type:MM_FILEPAGES val:33 [ 29.777126] BUG: Bad rss-counter state mm:000000008859b75a type:MM_ANONPAGES val:22 [ 29.941868] ================================================================== [ 29.942771] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.943772] Read of size 8 at addr ffff88800e9764e0 by task sshd/219 [ 29.944573] [ 29.944794] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.945675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.946673] Call Trace: [ 29.947007] [ 29.947300] dump_stack_lvl+0x91/0xf0 [ 29.947804] print_report+0xcc/0x620 [ 29.948318] ? __virt_addr_valid+0x102/0x340 [ 29.948897] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.949533] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.950163] kasan_report+0xbe/0xf0 [ 29.950656] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.951289] vma_interval_tree_remove+0xc75/0xec0 [ 29.951910] vma_prepare+0xc54/0x11a0 [ 29.952384] __split_vma+0x5af/0x950 [ 29.952863] ? __pfx___split_vma+0x10/0x10 [ 29.953390] ? find_held_lock+0x2c/0x110 [ 29.953925] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.954495] ? lock_is_held_type+0x9f/0x120 [ 29.955065] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.955694] ? mtree_range_walk+0x632/0x900 [ 29.956283] ? mas_walk+0x5c7/0x7c0 [ 29.956798] do_vmi_munmap+0x1f1/0x2b0 [ 29.957305] mmap_region+0x1f9/0x2660 [ 29.957803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.958333] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.959078] ? __pfx_lock_acquire+0x10/0x10 [ 29.959623] ? __pfx_mmap_region+0x10/0x10 [ 29.960161] ? security_mmap_addr+0x7d/0xa0 [ 29.960711] ? get_unmapped_area+0x1f5/0x3f0 [ 29.961276] do_mmap+0x854/0xf00 [ 29.961730] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.962240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.962825] ksys_mmap_pgoff+0x3af/0x500 [ 29.963358] do_syscall_64+0x3f/0x90 [ 29.963865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.964537] RIP: 0033:0x7f6ea162ad82 [ 29.965013] 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 [ 29.967244] RSP: 002b:00007ffefd9a13c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.968195] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ea162ad82 [ 29.969093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ea0a64000 [ 29.969952] RBP: 00007f6ea0a64000 R08: 0000000000000009 R09: 0000000000001000 [ 29.970851] R10: 0000000000000812 R11: 0000000000000206 R12: 00005642b72edf70 [ 29.971728] R13: 00007ffefd9a13e0 R14: 00007ffefd9a1410 R15: 00007ffefd9a1770 [ 29.972592] [ 29.972887] [ 29.973104] Allocated by task 212: [ 29.973539] kasan_save_stack+0x22/0x50 [ 29.974064] kasan_set_track+0x25/0x30 [ 29.974581] __kasan_slab_alloc+0x59/0x70 [ 29.975129] kmem_cache_alloc+0x16b/0x370 [ 29.975675] vm_area_dup+0x20/0x160 [ 29.976162] __split_vma+0x170/0x950 [ 29.976655] split_vma+0xc6/0x110 [ 29.977115] mprotect_fixup+0x8d2/0xb30 [ 29.977636] do_mprotect_pkey+0x87e/0xd40 [ 29.978158] __x64_sys_mprotect+0x78/0xc0 [ 29.978681] do_syscall_64+0x3f/0x90 [ 29.979152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.979791] [ 29.980015] Freed by task 212: [ 29.980409] kasan_save_stack+0x22/0x50 [ 29.980917] kasan_set_track+0x25/0x30 [ 29.981414] kasan_save_free_info+0x2b/0x50 [ 29.981973] __kasan_slab_free+0x10a/0x190 [ 29.982531] kmem_cache_free+0x10d/0x4d0 [ 29.983060] rcu_core+0x8c8/0x2860 [ 29.983521] __do_softirq+0x1b7/0x7d4 [ 29.984032] [ 29.984250] Last potentially related work creation: [ 29.984882] kasan_save_stack+0x22/0x50 [ 29.985404] __kasan_record_aux_stack+0x8e/0xa0 [ 29.985994] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.986664] remove_vma+0x139/0x170 [ 29.987139] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.987722] do_vmi_munmap+0x1f1/0x2b0 [ 29.988247] __vm_munmap+0x138/0x3a0 [ 29.988730] __x64_sys_munmap+0x59/0x80 [ 29.989240] do_syscall_64+0x3f/0x90 [ 29.989732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.990396] [ 29.990620] The buggy address belongs to the object at ffff88800e976488 [ 29.990620] which belongs to the cache vm_area_struct of size 168 [ 29.992183] The buggy address is located 88 bytes inside of [ 29.992183] freed 168-byte region [ffff88800e976488, ffff88800e976530) [ 29.993636] [ 29.993852] The buggy address belongs to the physical page: [ 29.994531] page:00000000fd5c37b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe976 [ 29.995653] memcg:ffff88800c9e1a01 [ 29.996114] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.996791] page_type: 0xffffffff() [ 29.997259] raw: 0100000000000200 ffff88800879fc80 ffffea0000590640 dead000000000008 [ 29.998218] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9e1a01 [ 29.999164] page dumped because: kasan: bad access detected [ 29.999860] [ 30.000090] Memory state around the buggy address: [ 30.000691] ffff88800e976380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.001575] ffff88800e976400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.002467] >ffff88800e976480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.003359] ^ [ 30.004155] ffff88800e976500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.005042] ffff88800e976580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.005935] ================================================================== [ 30.007219] Disabling lock debugging due to kernel taint [ 31.855562] BUG: Bad rss-counter state mm:000000008dc7d3db type:MM_FILEPAGES val:33 [ 31.856279] BUG: Bad rss-counter state mm:000000008dc7d3db type:MM_ANONPAGES val:22 [ 32.350244] BUG: Bad rss-counter state mm:0000000073011eda type:MM_FILEPAGES val:33 [ 32.351864] BUG: Bad rss-counter state mm:0000000073011eda type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16721' (ECDSA) to the list of known hosts. 2023/06/20 01:37:59 fuzzer started 2023/06/20 01:37:59 dialing manager at localhost:44161 2023/06/20 01:37:59 checking machine... 2023/06/20 01:37:59 checking revisions... [ 33.027807] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:37:59 testing simple program... [ 33.092080] cgroup: Unknown subsys name 'net' [ 33.130641] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:37:57 Registers: info registers vcpu 0 RAX=fffffbfff0b7498c RBX=ffffffff85ba4c60 RCX=ffffffff812e00d6 RDX=0000000000000001 RSI=0000000000000004 RDI=ffffffff85ba4c60 RBP=fffffbfff0b7498c RSP=ffff88800ef77c08 R8 =0000000000000001 R9 =fffffbfff0b7498c R10=ffffffff85ba4c63 R11=0000000000000000 R12=ffffffff85ba4c68 R13=ffffffff85ba4c70 R14=0000000000000003 R15=ffff88800ef77e28 RIP=ffffffff8180ef1a RFL=00000082 [--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 00007fb8c8b20900 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=00007fb8c90d7618 CR3=000000000ef18000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f19a30284b0 CR3=000000001006a000 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=37333a3130203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383832 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000