syzkaller login: [ 29.948410] BUG: Bad rss-counter state mm:000000007b7d0c4b type:MM_FILEPAGES val:33 [ 29.949572] BUG: Bad rss-counter state mm:000000007b7d0c4b type:MM_ANONPAGES val:22 [ 30.078851] ================================================================== [ 30.079454] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.080077] Read of size 8 at addr ffff888010338880 by task sshd/221 [ 30.080554] [ 30.080688] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.081232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.081821] Call Trace: [ 30.082027] [ 30.082214] dump_stack_lvl+0x91/0xf0 [ 30.082527] print_report+0xcc/0x620 [ 30.082836] ? __virt_addr_valid+0x102/0x340 [ 30.083198] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.083729] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.084159] kasan_report+0xbe/0xf0 [ 30.084460] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.084849] vma_interval_tree_remove+0xc75/0xec0 [ 30.085223] vma_prepare+0xc54/0x11a0 [ 30.085581] __split_vma+0x5af/0x950 [ 30.085879] ? __pfx___split_vma+0x10/0x10 [ 30.086213] ? find_held_lock+0x2c/0x110 [ 30.086551] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.086902] ? lock_is_held_type+0x9f/0x120 [ 30.087241] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.087626] ? mtree_range_walk+0x632/0x900 [ 30.088035] ? mas_walk+0x5c7/0x7c0 [ 30.088328] do_vmi_munmap+0x1f1/0x2b0 [ 30.088628] mmap_region+0x1f9/0x2660 [ 30.088919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.089230] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.089671] ? __pfx_lock_acquire+0x10/0x10 [ 30.090010] ? __pfx_mmap_region+0x10/0x10 [ 30.090335] ? security_mmap_addr+0x7d/0xa0 [ 30.090651] ? get_unmapped_area+0x1f5/0x3f0 [ 30.090988] do_mmap+0x854/0xf00 [ 30.091273] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.091592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.091985] ksys_mmap_pgoff+0x3af/0x500 [ 30.092305] do_syscall_64+0x3f/0x90 [ 30.092615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.093029] RIP: 0033:0x7f27b6d9ed82 [ 30.093320] 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 [ 30.094725] RSP: 002b:00007fff56003048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.095337] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27b6d9ed82 [ 30.095912] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f27b61d8000 [ 30.096458] RBP: 00007f27b61d8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.097011] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600ce74bec0 [ 30.097581] R13: 00007fff56003060 R14: 00007fff56003090 R15: 00007fff560033f0 [ 30.098143] [ 30.098343] [ 30.098492] Allocated by task 213: [ 30.098793] kasan_save_stack+0x22/0x50 [ 30.099138] kasan_set_track+0x25/0x30 [ 30.099477] __kasan_slab_alloc+0x59/0x70 [ 30.099816] kmem_cache_alloc+0x16b/0x370 [ 30.100210] vm_area_dup+0x20/0x160 [ 30.100516] __split_vma+0x170/0x950 [ 30.100829] split_vma+0xc6/0x110 [ 30.101129] mprotect_fixup+0x8d2/0xb30 [ 30.101541] do_mprotect_pkey+0x87e/0xd40 [ 30.101941] __x64_sys_mprotect+0x78/0xc0 [ 30.102363] do_syscall_64+0x3f/0x90 [ 30.102669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.103082] [ 30.103223] Freed by task 210: [ 30.103492] kasan_save_stack+0x22/0x50 [ 30.103861] kasan_set_track+0x25/0x30 [ 30.104232] kasan_save_free_info+0x2b/0x50 [ 30.104605] __kasan_slab_free+0x10a/0x190 [ 30.104961] kmem_cache_free+0x10d/0x4d0 [ 30.105288] rcu_core+0x8c8/0x2860 [ 30.105567] __do_softirq+0x1b7/0x7d4 [ 30.105888] [ 30.106034] Last potentially related work creation: [ 30.106410] kasan_save_stack+0x22/0x50 [ 30.106808] __kasan_record_aux_stack+0x8e/0xa0 [ 30.107198] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.107631] remove_vma+0x139/0x170 [ 30.107998] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.108391] do_vmi_munmap+0x1f1/0x2b0 [ 30.108712] __vm_munmap+0x138/0x3a0 [ 30.109025] __x64_sys_munmap+0x59/0x80 [ 30.109366] do_syscall_64+0x3f/0x90 [ 30.109691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.110125] [ 30.110292] The buggy address belongs to the object at ffff888010338828 [ 30.110292] which belongs to the cache vm_area_struct of size 168 [ 30.111287] The buggy address is located 88 bytes inside of [ 30.111287] freed 168-byte region [ffff888010338828, ffff8880103388d0) [ 30.112230] [ 30.112417] The buggy address belongs to the physical page: [ 30.112821] page:0000000078120564 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10338 [ 30.113522] memcg:ffff888015dc6b01 [ 30.113806] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.114226] page_type: 0xffffffff() [ 30.114548] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.115217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015dc6b01 [ 30.115796] page dumped because: kasan: bad access detected [ 30.116280] [ 30.116418] Memory state around the buggy address: [ 30.116803] ffff888010338780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.117377] ffff888010338800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.117926] >ffff888010338880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.118439] ^ [ 30.118687] ffff888010338900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.119218] ffff888010338980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.119733] ================================================================== [ 30.120598] Disabling lock debugging due to kernel taint [ 31.617885] BUG: Bad rss-counter state mm:00000000cae51824 type:MM_FILEPAGES val:33 [ 31.618585] BUG: Bad rss-counter state mm:00000000cae51824 type:MM_ANONPAGES val:22 [ 31.990867] BUG: Bad rss-counter state mm:000000006ff5f103 type:MM_FILEPAGES val:33 [ 31.991541] BUG: Bad rss-counter state mm:000000006ff5f103 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48896' (ECDSA) to the list of known hosts. 2023/06/21 08:53:15 fuzzer started 2023/06/21 08:53:15 dialing manager at localhost:36067 2023/06/21 08:53:15 checking machine... 2023/06/21 08:53:15 checking revisions... [ 32.570704] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:53:16 testing simple program... [ 32.606777] cgroup: Unknown subsys name 'net' [ 32.654581] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:53:15 Registers: info registers vcpu 0 RAX=ffffffff8120686f RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110011b3f3a RSI=ffffffff8120686f RDI=ffff888008d9fa40 RBP=ffff888008d9fa10 RSP=ffff888008d9f970 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=000000000000a20c R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88801a2b1c60 RIP=ffffffff84538440 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 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=00007f75260142a0 CR3=000000000dbfc000 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=2035313a33353a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a33353a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888016218bd0 RCX=ffff888016218bd0 RDX=0000000000120012 RSI=ffff888016218bd0 RDI=ffff8880087a0dc0 RBP=ffff8880160af9e8 RSP=ffff8880160af950 R8 =0000000080120011 R9 =0000000000000000 R10=ffffea0000588600 R11=000000008011000e R12=ffffea0000588600 R13=0000000000000000 R14=0000000000120011 R15=ffff8880087a0dc0 RIP=ffffffff81809672 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 00007fb4164f9900 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=00007ffdb8af5000 CR3=00000000094d2000 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