syzkaller login: [ 57.337478] BUG: Bad rss-counter state mm:00000000216e5fd4 type:MM_FILEPAGES val:33 [ 57.338761] BUG: Bad rss-counter state mm:00000000216e5fd4 type:MM_ANONPAGES val:22 [ 57.512108] ================================================================== [ 57.513023] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.513957] Read of size 8 at addr ffff88801aa1c228 by task sshd/220 [ 57.514718] [ 57.514939] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.515904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.516873] Call Trace: [ 57.517185] [ 57.517482] dump_stack_lvl+0x91/0xf0 [ 57.517968] print_report+0xcc/0x620 [ 57.518447] ? __virt_addr_valid+0x102/0x340 [ 57.518988] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.519598] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.520217] kasan_report+0xbe/0xf0 [ 57.520694] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.521306] vma_interval_tree_remove+0xc75/0xec0 [ 57.521917] vma_prepare+0xc54/0x11a0 [ 57.522391] __split_vma+0x5af/0x950 [ 57.522893] ? __pfx___split_vma+0x10/0x10 [ 57.523432] ? find_held_lock+0x2c/0x110 [ 57.524009] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.524575] ? lock_is_held_type+0x9f/0x120 [ 57.525121] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.525735] ? mtree_range_walk+0x632/0x900 [ 57.526305] ? mas_walk+0x5c7/0x7c0 [ 57.526783] do_vmi_munmap+0x1f1/0x2b0 [ 57.527327] mmap_region+0x1f9/0x2660 [ 57.527848] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.528372] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.529093] ? __pfx_lock_acquire+0x10/0x10 [ 57.529666] ? __pfx_mmap_region+0x10/0x10 [ 57.530241] ? security_mmap_addr+0x7d/0xa0 [ 57.530808] ? get_unmapped_area+0x1f5/0x3f0 [ 57.531410] do_mmap+0x854/0xf00 [ 57.531885] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.532393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.532983] ksys_mmap_pgoff+0x3af/0x500 [ 57.533514] do_syscall_64+0x3f/0x90 [ 57.534004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.534691] RIP: 0033:0x7fa230f8cd82 [ 57.535168] 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 [ 57.537397] RSP: 002b:00007ffe9fc69ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.538340] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa230f8cd82 [ 57.539224] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2303c6000 [ 57.540115] RBP: 00007fa2303c6000 R08: 0000000000000009 R09: 0000000000001000 [ 57.541010] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e5f214d90 [ 57.541903] R13: 00007ffe9fc69d00 R14: 00007ffe9fc69d30 R15: 00007ffe9fc6a090 [ 57.542786] [ 57.543088] [ 57.543321] Allocated by task 213: [ 57.543777] kasan_save_stack+0x22/0x50 [ 57.544302] kasan_set_track+0x25/0x30 [ 57.544815] __kasan_slab_alloc+0x59/0x70 [ 57.545350] kmem_cache_alloc+0x16b/0x370 [ 57.545892] vm_area_dup+0x20/0x160 [ 57.546358] __split_vma+0x170/0x950 [ 57.546843] split_vma+0xc6/0x110 [ 57.547299] mprotect_fixup+0x8d2/0xb30 [ 57.547834] do_mprotect_pkey+0x87e/0xd40 [ 57.548386] __x64_sys_mprotect+0x78/0xc0 [ 57.548930] do_syscall_64+0x3f/0x90 [ 57.549419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.550089] [ 57.550305] Freed by task 213: [ 57.550709] kasan_save_stack+0x22/0x50 [ 57.551232] kasan_set_track+0x25/0x30 [ 57.551749] kasan_save_free_info+0x2b/0x50 [ 57.552298] __kasan_slab_free+0x10a/0x190 [ 57.552847] kmem_cache_free+0x10d/0x4d0 [ 57.553382] rcu_core+0x8c8/0x2860 [ 57.553848] __do_softirq+0x1b7/0x7d4 [ 57.554344] [ 57.554562] Last potentially related work creation: [ 57.555178] kasan_save_stack+0x22/0x50 [ 57.555699] __kasan_record_aux_stack+0x8e/0xa0 [ 57.556331] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.557002] remove_vma+0x139/0x170 [ 57.557461] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.558043] do_vmi_munmap+0x1f1/0x2b0 [ 57.558538] __vm_munmap+0x138/0x3a0 [ 57.559024] __x64_sys_munmap+0x59/0x80 [ 57.559540] do_syscall_64+0x3f/0x90 [ 57.560043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.560703] [ 57.560923] The buggy address belongs to the object at ffff88801aa1c1d0 [ 57.560923] which belongs to the cache vm_area_struct of size 168 [ 57.562464] The buggy address is located 88 bytes inside of [ 57.562464] freed 168-byte region [ffff88801aa1c1d0, ffff88801aa1c278) [ 57.563925] [ 57.564146] The buggy address belongs to the physical page: [ 57.564826] page:000000006900efda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aa1c [ 57.565973] memcg:ffff88800f0a7401 [ 57.566409] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.567078] page_type: 0xffffffff() [ 57.567537] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 57.568501] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0a7401 [ 57.569447] page dumped because: kasan: bad access detected [ 57.570139] [ 57.570359] Memory state around the buggy address: [ 57.570956] ffff88801aa1c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.571861] ffff88801aa1c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 57.572759] >ffff88801aa1c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 57.573633] ^ [ 57.574217] ffff88801aa1c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 57.575092] ffff88801aa1c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 57.575998] ================================================================== [ 57.577052] Disabling lock debugging due to kernel taint [ 59.607407] BUG: Bad rss-counter state mm:00000000bdfe12f0 type:MM_FILEPAGES val:33 [ 59.608446] BUG: Bad rss-counter state mm:00000000bdfe12f0 type:MM_ANONPAGES val:22 [ 60.054760] BUG: Bad rss-counter state mm:000000007e978cb7 type:MM_FILEPAGES val:33 [ 60.056043] BUG: Bad rss-counter state mm:000000007e978cb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25673' (ECDSA) to the list of known hosts. 2023/06/20 04:21:07 fuzzer started 2023/06/20 04:21:07 dialing manager at localhost:44161 2023/06/20 04:21:07 checking machine... 2023/06/20 04:21:07 checking revisions... [ 60.748149] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:21:07 testing simple program... [ 60.795811] cgroup: Unknown subsys name 'net' [ 60.845003] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:20:41 Registers: info registers vcpu 0 RAX=1ffffffff0bb783e RBX=ffffffff85dbc1f4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff88800fbcf2b8 R8 =ffffffff860d68c0 R9 =ffff88800fbcf3b0 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1f4 R13=ffffffff85dbc1cc R14=ffffffff85dbc1f0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007fe709154900 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=00007ffe80220000 CR3=000000000f1e0000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8450d7d6 RDX=00000000000350d7 RSI=00000000000350d7 RDI=ffffffff865bbf1c RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =0000000000000000 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b53a6 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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=00007f909cae9a80 CR3=00000000145d2000 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=31323a3430203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323838 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000