syzkaller login: [ 30.726114] BUG: Bad rss-counter state mm:0000000051ecebb7 type:MM_FILEPAGES val:33 [ 30.727397] BUG: Bad rss-counter state mm:0000000051ecebb7 type:MM_ANONPAGES val:22 [ 30.766581] ================================================================== [ 30.767510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.768633] Read of size 8 at addr ffff88800c709880 by task sshd/220 [ 30.769536] [ 30.769771] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.770656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.771697] Call Trace: [ 30.772028] [ 30.772326] dump_stack_lvl+0x91/0xf0 [ 30.772831] print_report+0xcc/0x620 [ 30.773337] ? __virt_addr_valid+0x102/0x340 [ 30.773899] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774547] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775207] kasan_report+0xbe/0xf0 [ 30.775700] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.776342] vma_interval_tree_remove+0xc75/0xec0 [ 30.776965] vma_prepare+0xc54/0x11a0 [ 30.777461] __split_vma+0x5af/0x950 [ 30.777940] ? __pfx___split_vma+0x10/0x10 [ 30.778498] ? find_held_lock+0x2c/0x110 [ 30.779053] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.779637] ? lock_is_held_type+0x9f/0x120 [ 30.780202] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.780831] ? mtree_range_walk+0x632/0x900 [ 30.781412] ? mas_walk+0x5c7/0x7c0 [ 30.781897] do_vmi_munmap+0x1f1/0x2b0 [ 30.782410] mmap_region+0x1f9/0x2660 [ 30.782920] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.783447] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.784175] ? __pfx_lock_acquire+0x10/0x10 [ 30.784725] ? __pfx_mmap_region+0x10/0x10 [ 30.785281] ? security_mmap_addr+0x7d/0xa0 [ 30.785819] ? get_unmapped_area+0x1f5/0x3f0 [ 30.786398] do_mmap+0x854/0xf00 [ 30.786864] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.787384] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.787953] ksys_mmap_pgoff+0x3af/0x500 [ 30.788478] do_syscall_64+0x3f/0x90 [ 30.788973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789640] RIP: 0033:0x7f556038fd82 [ 30.790104] 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 [ 30.792290] RSP: 002b:00007ffd6cb0fd38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.793212] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f556038fd82 [ 30.794077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f555f7c9000 [ 30.794963] RBP: 00007f555f7c9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.795842] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d75905b980 [ 30.796711] R13: 00007ffd6cb0fd50 R14: 00007ffd6cb0fd80 R15: 00007ffd6cb100e0 [ 30.797587] [ 30.797884] [ 30.798109] Allocated by task 213: [ 30.798549] kasan_save_stack+0x22/0x50 [ 30.799067] kasan_set_track+0x25/0x30 [ 30.799582] __kasan_slab_alloc+0x59/0x70 [ 30.800128] kmem_cache_alloc+0x16b/0x370 [ 30.800656] vm_area_dup+0x20/0x160 [ 30.801121] __split_vma+0x170/0x950 [ 30.801594] split_vma+0xc6/0x110 [ 30.802041] mprotect_fixup+0x8d2/0xb30 [ 30.802558] do_mprotect_pkey+0x87e/0xd40 [ 30.803112] __x64_sys_mprotect+0x78/0xc0 [ 30.803653] do_syscall_64+0x3f/0x90 [ 30.804144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804794] [ 30.805009] Freed by task 213: [ 30.805408] kasan_save_stack+0x22/0x50 [ 30.805923] kasan_set_track+0x25/0x30 [ 30.806431] kasan_save_free_info+0x2b/0x50 [ 30.807012] __kasan_slab_free+0x10a/0x190 [ 30.807565] kmem_cache_free+0x10d/0x4d0 [ 30.808085] rcu_core+0x8c8/0x2860 [ 30.808543] __do_softirq+0x1b7/0x7d4 [ 30.809037] [ 30.809258] Last potentially related work creation: [ 30.809869] kasan_save_stack+0x22/0x50 [ 30.810390] __kasan_record_aux_stack+0x8e/0xa0 [ 30.810998] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.811666] remove_vma+0x139/0x170 [ 30.812122] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.812701] do_vmi_munmap+0x1f1/0x2b0 [ 30.813192] __vm_munmap+0x138/0x3a0 [ 30.813671] __x64_sys_munmap+0x59/0x80 [ 30.814181] do_syscall_64+0x3f/0x90 [ 30.814656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.815344] [ 30.815564] The buggy address belongs to the object at ffff88800c709828 [ 30.815564] which belongs to the cache vm_area_struct of size 168 [ 30.817082] The buggy address is located 88 bytes inside of [ 30.817082] freed 168-byte region [ffff88800c709828, ffff88800c7098d0) [ 30.818513] [ 30.818748] The buggy address belongs to the physical page: [ 30.819432] page:00000000b90a9baf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc709 [ 30.820545] memcg:ffff88800d061501 [ 30.820981] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.821703] page_type: 0xffffffff() [ 30.822160] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.823109] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d061501 [ 30.824039] page dumped because: kasan: bad access detected [ 30.824732] [ 30.824953] Memory state around the buggy address: [ 30.825549] ffff88800c709780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.826444] ffff88800c709800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.827351] >ffff88800c709880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.828218] ^ [ 30.828629] ffff88800c709900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.829508] ffff88800c709980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.830380] ================================================================== [ 30.831548] Disabling lock debugging due to kernel taint [ 32.761014] BUG: Bad rss-counter state mm:000000001b3de048 type:MM_FILEPAGES val:33 [ 32.762164] BUG: Bad rss-counter state mm:000000001b3de048 type:MM_ANONPAGES val:22 [ 33.273771] BUG: Bad rss-counter state mm:00000000307d192f type:MM_FILEPAGES val:33 [ 33.274841] BUG: Bad rss-counter state mm:00000000307d192f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33507' (ECDSA) to the list of known hosts. 2023/06/20 17:35:36 fuzzer started 2023/06/20 17:35:37 dialing manager at localhost:36067 2023/06/20 17:35:37 checking machine... 2023/06/20 17:35:37 checking revisions... [ 34.010419] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:35:37 testing simple program... [ 34.047430] cgroup: Unknown subsys name 'net' [ 34.095248] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:35:36 Registers: info registers vcpu 0 RAX=ffffea0000380600 RBX=ffff88800e018e40 RCX=ffff88800844f780 RDX=ffff88808e018e40 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff88800ec37988 R8 =ffff88800e018e40 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=dffffc0000000000 R13=ffff88800ec379c8 R14=0000000000000000 R15=ffff88800934a000 RIP=ffffffff81810393 RFL=00000286 [--S--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 00007fcf8857c900 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=00007fcf88b340b0 CR3=000000001bee0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86098092 RBX=0000000000000002 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffff88806cf09af0 RSP=ffff88806cf099c0 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcbd RFL=00000286 [--S--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 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=00007f52fa2b2710 CR3=000000000dd0c000 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=6d1c41bf494c9a985947dc9f73d8d844 XMM02=000000000011a2a8eff9b2d0a8fce9cb XMM03=000000000011a3782c67c8bc2e329bc3 XMM04=64c0e5c62e87edf800000000000ae988 XMM05=19e9129bd510f23500000000001315e0 XMM06=42dcdf4788537da20000000000130448 XMM07=e042d86d42eb936e0000000000121a00 XMM08=c7709975479a3392000000000011a378 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000