syzkaller login: [ 62.060526] BUG: Bad rss-counter state mm:00000000cf714359 type:MM_FILEPAGES val:33 [ 62.061737] BUG: Bad rss-counter state mm:00000000cf714359 type:MM_ANONPAGES val:22 [ 62.104640] ================================================================== [ 62.105634] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.106580] Read of size 8 at addr ffff888016acc228 by task sshd/229 [ 62.107357] [ 62.107574] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.108454] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.109452] Call Trace: [ 62.109769] [ 62.110060] dump_stack_lvl+0x91/0xf0 [ 62.110550] print_report+0xcc/0x620 [ 62.111043] ? __virt_addr_valid+0x102/0x340 [ 62.111593] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.112224] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.112842] kasan_report+0xbe/0xf0 [ 62.113321] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.113940] vma_interval_tree_remove+0xc75/0xec0 [ 62.114542] vma_prepare+0xc54/0x11a0 [ 62.115041] __split_vma+0x5af/0x950 [ 62.115508] ? __pfx___split_vma+0x10/0x10 [ 62.116036] ? find_held_lock+0x2c/0x110 [ 62.116554] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.117118] ? lock_is_held_type+0x9f/0x120 [ 62.117650] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.118251] ? mtree_range_walk+0x632/0x900 [ 62.118798] ? mas_walk+0x5c7/0x7c0 [ 62.119282] do_vmi_munmap+0x1f1/0x2b0 [ 62.119771] mmap_region+0x1f9/0x2660 [ 62.120249] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.120761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.121470] ? __pfx_lock_acquire+0x10/0x10 [ 62.122006] ? __pfx_mmap_region+0x10/0x10 [ 62.122541] ? security_mmap_addr+0x7d/0xa0 [ 62.123097] ? get_unmapped_area+0x1f5/0x3f0 [ 62.123654] do_mmap+0x854/0xf00 [ 62.124099] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.124605] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.125185] ksys_mmap_pgoff+0x3af/0x500 [ 62.125710] do_syscall_64+0x3f/0x90 [ 62.126196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.126888] RIP: 0033:0x7f9439720d82 [ 62.127364] 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 [ 62.129538] RSP: 002b:00007ffc1f2c0ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.130596] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9439720d82 [ 62.131474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9438b5a000 [ 62.132343] RBP: 00007f9438b5a000 R08: 0000000000000009 R09: 0000000000001000 [ 62.133195] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b1302ef70 [ 62.134027] R13: 00007ffc1f2c1010 R14: 00007ffc1f2c1040 R15: 00007ffc1f2c13a0 [ 62.134888] [ 62.135184] [ 62.135399] Allocated by task 222: [ 62.135827] kasan_save_stack+0x22/0x50 [ 62.136333] kasan_set_track+0x25/0x30 [ 62.136828] __kasan_slab_alloc+0x59/0x70 [ 62.137355] kmem_cache_alloc+0x16b/0x370 [ 62.137862] vm_area_dup+0x20/0x160 [ 62.138320] __split_vma+0x170/0x950 [ 62.138781] split_vma+0xc6/0x110 [ 62.139231] mprotect_fixup+0x8d2/0xb30 [ 62.139731] do_mprotect_pkey+0x87e/0xd40 [ 62.140251] __x64_sys_mprotect+0x78/0xc0 [ 62.140766] do_syscall_64+0x3f/0x90 [ 62.141239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.141878] [ 62.142095] Freed by task 222: [ 62.142484] kasan_save_stack+0x22/0x50 [ 62.143129] kasan_set_track+0x25/0x30 [ 62.143778] kasan_save_free_info+0x2b/0x50 [ 62.144451] __kasan_slab_free+0x10a/0x190 [ 62.145149] kmem_cache_free+0x10d/0x4d0 [ 62.145818] rcu_core+0x8c8/0x2860 [ 62.146369] __do_softirq+0x1b7/0x7d4 [ 62.147003] [ 62.147268] Last potentially related work creation: [ 62.148000] kasan_save_stack+0x22/0x50 [ 62.148615] __kasan_record_aux_stack+0x8e/0xa0 [ 62.149331] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.150124] remove_vma+0x139/0x170 [ 62.150676] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.151404] do_vmi_munmap+0x1f1/0x2b0 [ 62.152009] __vm_munmap+0x138/0x3a0 [ 62.152575] __x64_sys_munmap+0x59/0x80 [ 62.153194] do_syscall_64+0x3f/0x90 [ 62.153789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.154575] [ 62.154851] The buggy address belongs to the object at ffff888016acc1d0 [ 62.154851] which belongs to the cache vm_area_struct of size 168 [ 62.156687] The buggy address is located 88 bytes inside of [ 62.156687] freed 168-byte region [ffff888016acc1d0, ffff888016acc278) [ 62.158435] [ 62.158710] The buggy address belongs to the physical page: [ 62.159555] page:00000000b0bfc2b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16acc [ 62.160783] memcg:ffff88800e2b7f01 [ 62.161227] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.161898] page_type: 0xffffffff() [ 62.162353] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.163319] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2b7f01 [ 62.164248] page dumped because: kasan: bad access detected [ 62.164940] [ 62.165156] Memory state around the buggy address: [ 62.165772] ffff888016acc100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.166647] ffff888016acc180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 62.167536] >ffff888016acc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 62.168410] ^ [ 62.168989] ffff888016acc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 62.169861] ffff888016acc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 62.170739] ================================================================== [ 62.172084] Disabling lock debugging due to kernel taint [ 64.268368] BUG: Bad rss-counter state mm:000000006d516db8 type:MM_FILEPAGES val:33 [ 64.269351] BUG: Bad rss-counter state mm:000000006d516db8 type:MM_ANONPAGES val:22 [ 64.773023] BUG: Bad rss-counter state mm:0000000042ec1b87 type:MM_FILEPAGES val:33 [ 64.774256] BUG: Bad rss-counter state mm:0000000042ec1b87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32359' (ECDSA) to the list of known hosts. 2023/06/19 12:31:54 fuzzer started 2023/06/19 12:31:54 dialing manager at localhost:44161 2023/06/19 12:31:54 checking machine... 2023/06/19 12:31:54 checking revisions... [ 65.523100] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:31:54 testing simple program... [ 65.565758] cgroup: Unknown subsys name 'net' [ 65.633339] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:31:53 Registers: info registers vcpu 0 RAX=ffffffff81f11640 RBX=ffffffff852c7108 RCX=0000000000000000 RDX=ffff88800fe3d1c0 RSI=ffff88800e4e5b40 RDI=ffff88800c4bd000 RBP=dffffc0000000000 RSP=ffff88800fdb7bb0 R8 =0000000000000006 R9 =0000000000000014 R10=0000000000000014 R11=00000000000b6996 R12=0000000000000014 R13=ffff88800e4e5b40 R14=ffff88800c4bd000 R15=ffff88800e4e5b40 RIP=ffffffff81f11644 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 00007f67ee154900 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=00007ffc3362a000 CR3=0000000018658000 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=1ffff110012df65f RBX=ffff8880096fb2c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880096fb2f8 RBP=ffff888009481660 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888009502c80 R14=ffffffff8186b9c5 R15=ffff88800d99a480 RIP=ffffffff81846362 RFL=00000046 [---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 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=00007f20c0aeeb50 CR3=000000000de3e000 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=2033353a31333a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3833 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3833325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a31333a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000