syzkaller login: [ 23.868710] BUG: Bad rss-counter state mm:000000002363f6fd type:MM_FILEPAGES val:33 [ 23.870087] BUG: Bad rss-counter state mm:000000002363f6fd type:MM_ANONPAGES val:22 [ 23.927797] ================================================================== [ 23.928902] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.930077] Read of size 8 at addr ffff88800eee2310 by task sshd/219 [ 23.931028] [ 23.931310] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.932367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.933566] Call Trace: [ 23.933965] [ 23.934321] dump_stack_lvl+0x91/0xf0 [ 23.934954] print_report+0xcc/0x620 [ 23.935568] ? __virt_addr_valid+0x102/0x340 [ 23.936254] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.937008] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.937795] kasan_report+0xbe/0xf0 [ 23.938400] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.939212] vma_interval_tree_remove+0xc75/0xec0 [ 23.939996] vma_prepare+0xc54/0x11a0 [ 23.940610] __split_vma+0x5af/0x950 [ 23.941217] ? __pfx___split_vma+0x10/0x10 [ 23.941916] ? find_held_lock+0x2c/0x110 [ 23.942582] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.943320] ? lock_is_held_type+0x9f/0x120 [ 23.944015] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.944787] ? mtree_range_walk+0x632/0x900 [ 23.945503] ? mas_walk+0x5c7/0x7c0 [ 23.946106] do_vmi_munmap+0x1f1/0x2b0 [ 23.946733] mmap_region+0x1f9/0x2660 [ 23.947357] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.948021] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.948924] ? __pfx_lock_acquire+0x10/0x10 [ 23.949618] ? __pfx_mmap_region+0x10/0x10 [ 23.950310] ? security_mmap_addr+0x7d/0xa0 [ 23.951010] ? get_unmapped_area+0x1f5/0x3f0 [ 23.951730] do_mmap+0x854/0xf00 [ 23.952280] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.952920] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.953608] ksys_mmap_pgoff+0x3af/0x500 [ 23.954226] do_syscall_64+0x3f/0x90 [ 23.954807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.955717] RIP: 0033:0x7ffa8a2ced82 [ 23.956329] 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 [ 23.959170] RSP: 002b:00007ffc58edb2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.960358] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa8a2ced82 [ 23.961469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa89708000 [ 23.962584] RBP: 00007ffa89708000 R08: 0000000000000009 R09: 0000000000001000 [ 23.963726] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c05724f60 [ 23.964858] R13: 00007ffc58edb310 R14: 00007ffc58edb340 R15: 00007ffc58edb6a0 [ 23.966001] [ 23.966390] [ 23.966674] Allocated by task 212: [ 23.967253] kasan_save_stack+0x22/0x50 [ 23.967921] kasan_set_track+0x25/0x30 [ 23.968576] __kasan_slab_alloc+0x59/0x70 [ 23.969270] kmem_cache_alloc+0x16b/0x370 [ 23.969950] vm_area_dup+0x20/0x160 [ 23.970550] __split_vma+0x170/0x950 [ 23.971194] split_vma+0xc6/0x110 [ 23.971745] mprotect_fixup+0x8d2/0xb30 [ 23.972322] do_mprotect_pkey+0x87e/0xd40 [ 23.972923] __x64_sys_mprotect+0x78/0xc0 [ 23.973522] do_syscall_64+0x3f/0x90 [ 23.974071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.974804] [ 23.975046] Freed by task 212: [ 23.975504] kasan_save_stack+0x22/0x50 [ 23.976074] kasan_set_track+0x25/0x30 [ 23.976639] kasan_save_free_info+0x2b/0x50 [ 23.977248] __kasan_slab_free+0x10a/0x190 [ 23.977852] kmem_cache_free+0x10d/0x4d0 [ 23.978429] rcu_core+0x8c8/0x2860 [ 23.978937] __do_softirq+0x1b7/0x7d4 [ 23.979499] [ 23.979744] Last potentially related work creation: [ 23.980413] kasan_save_stack+0x22/0x50 [ 23.980983] __kasan_record_aux_stack+0x8e/0xa0 [ 23.981641] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.982377] remove_vma+0x139/0x170 [ 23.982890] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.983540] do_vmi_munmap+0x1f1/0x2b0 [ 23.984094] __vm_munmap+0x138/0x3a0 [ 23.984628] __x64_sys_munmap+0x59/0x80 [ 23.985189] do_syscall_64+0x3f/0x90 [ 23.985729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.986462] [ 23.986703] Second to last potentially related work creation: [ 23.987494] kasan_save_stack+0x22/0x50 [ 23.988061] __kasan_record_aux_stack+0x8e/0xa0 [ 23.988710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.989437] remove_vma+0x139/0x170 [ 23.989952] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.990588] do_vmi_munmap+0x1f1/0x2b0 [ 23.991154] mmap_region+0x1f9/0x2660 [ 23.991700] do_mmap+0x854/0xf00 [ 23.992184] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.992737] ksys_mmap_pgoff+0x3af/0x500 [ 23.993300] do_syscall_64+0x3f/0x90 [ 23.993844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.994561] [ 23.994803] The buggy address belongs to the object at ffff88800eee22b8 [ 23.994803] which belongs to the cache vm_area_struct of size 168 [ 23.996459] The buggy address is located 88 bytes inside of [ 23.996459] freed 168-byte region [ffff88800eee22b8, ffff88800eee2360) [ 23.998047] [ 23.998288] The buggy address belongs to the physical page: [ 23.999023] page:000000009b0ae666 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeee2 [ 24.000253] memcg:ffff88800b862301 [ 24.000730] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.001518] page_type: 0xffffffff() [ 24.002021] raw: 0100000000000200 ffff8880087a0c80 ffffea0000336380 dead000000000007 [ 24.003065] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b862301 [ 24.004113] page dumped because: kasan: bad access detected [ 24.004863] [ 24.005105] Memory state around the buggy address: [ 24.005760] ffff88800eee2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.006730] ffff88800eee2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.007703] >ffff88800eee2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.008667] ^ [ 24.009191] ffff88800eee2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.010158] ffff88800eee2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.011151] ================================================================== [ 24.012728] Disabling lock debugging due to kernel taint [ 26.167210] BUG: Bad rss-counter state mm:0000000080c7e187 type:MM_FILEPAGES val:33 [ 26.168110] BUG: Bad rss-counter state mm:0000000080c7e187 type:MM_ANONPAGES val:22 [ 26.606625] BUG: Bad rss-counter state mm:00000000d7e784fc type:MM_FILEPAGES val:33 [ 26.607640] BUG: Bad rss-counter state mm:00000000d7e784fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48424' (ECDSA) to the list of known hosts. 2023/06/21 06:39:34 fuzzer started 2023/06/21 06:39:34 dialing manager at localhost:36067 2023/06/21 06:39:34 checking machine... 2023/06/21 06:39:34 checking revisions... [ 27.350376] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:39:34 testing simple program... [ 27.398980] cgroup: Unknown subsys name 'net' [ 27.438288] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:39:33 Registers: info registers vcpu 0 RAX=ffffffff81809add RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09e01 RSI=ffff88806ce09e28 RDI=ffff88806ce09e28 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff86138f56 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09e30 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f914a2948c0 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=00007f8b02bf5040 CR3=000000000c76c000 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=25252525252525252525252525252525 XMM01=00000000000000ff0000000000ff0000 XMM02=00000000000000ff0000000000ff0000 XMM03=0000556f8247df000000556f82464540 XMM04=00000003000000020000556f8247df00 XMM05=0000556f82477c500000556f8244e120 XMM06=0000556f824790c00000000000000000 XMM07=00000000000000000000000000000000 XMM08=732f636f72702f006b63616d7300632e XMM09=00000000000000000000000000000000 XMM10=00000000200000000000000020000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83c5c729 RDX=ffff888015fc9b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888008ee7800 RSP=ffff888016c1f580 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000053b0000053b R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000000 R15=ffff88800f1183c0 RIP=ffffffff814c0408 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 00007f05f0d06900 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=00007ffcf648b000 CR3=0000000016f4c000 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