syzkaller login: [ 30.440087] BUG: Bad rss-counter state mm:000000008d4d802e type:MM_FILEPAGES val:33 [ 30.441874] BUG: Bad rss-counter state mm:000000008d4d802e type:MM_ANONPAGES val:22 [ 30.580077] ================================================================== [ 30.580800] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.581522] Read of size 8 at addr ffff888019c7e3f8 by task sshd/220 [ 30.582109] [ 30.582276] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.582933] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.583697] Call Trace: [ 30.583940] [ 30.584156] dump_stack_lvl+0x91/0xf0 [ 30.584638] print_report+0xcc/0x620 [ 30.585013] ? __virt_addr_valid+0x102/0x340 [ 30.585445] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.585924] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.586396] kasan_report+0xbe/0xf0 [ 30.586766] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.587242] vma_interval_tree_remove+0xc75/0xec0 [ 30.587728] vma_prepare+0xc54/0x11a0 [ 30.588092] __split_vma+0x5af/0x950 [ 30.588458] ? __pfx___split_vma+0x10/0x10 [ 30.588877] ? find_held_lock+0x2c/0x110 [ 30.589280] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.589713] ? lock_is_held_type+0x9f/0x120 [ 30.590128] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.590598] ? mtree_range_walk+0x632/0x900 [ 30.591024] ? mas_walk+0x5c7/0x7c0 [ 30.591392] do_vmi_munmap+0x1f1/0x2b0 [ 30.591775] mmap_region+0x1f9/0x2660 [ 30.592149] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.592543] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.593097] ? __pfx_lock_acquire+0x10/0x10 [ 30.593509] ? __pfx_mmap_region+0x10/0x10 [ 30.593917] ? security_mmap_addr+0x7d/0xa0 [ 30.594328] ? get_unmapped_area+0x1f5/0x3f0 [ 30.594750] do_mmap+0x854/0xf00 [ 30.595087] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.595471] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.595917] ksys_mmap_pgoff+0x3af/0x500 [ 30.596314] do_syscall_64+0x3f/0x90 [ 30.596681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.597179] RIP: 0033:0x7f897add9d82 [ 30.597530] 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 [ 30.599171] RSP: 002b:00007fff5d758498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.599871] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f897add9d82 [ 30.600523] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f897a213000 [ 30.601174] RBP: 00007f897a213000 R08: 0000000000000009 R09: 0000000000001000 [ 30.601830] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561579011f70 [ 30.602482] R13: 00007fff5d7584b0 R14: 00007fff5d7584e0 R15: 00007fff5d758840 [ 30.603145] [ 30.603370] [ 30.603534] Allocated by task 213: [ 30.603883] kasan_save_stack+0x22/0x50 [ 30.604271] kasan_set_track+0x25/0x30 [ 30.604649] __kasan_slab_alloc+0x59/0x70 [ 30.605055] kmem_cache_alloc+0x16b/0x370 [ 30.605456] vm_area_dup+0x20/0x160 [ 30.605802] __split_vma+0x170/0x950 [ 30.606158] split_vma+0xc6/0x110 [ 30.606509] mprotect_fixup+0x8d2/0xb30 [ 30.606893] do_mprotect_pkey+0x87e/0xd40 [ 30.607296] __x64_sys_mprotect+0x78/0xc0 [ 30.607704] do_syscall_64+0x3f/0x90 [ 30.608073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.608570] [ 30.608737] Freed by task 213: [ 30.609038] kasan_save_stack+0x22/0x50 [ 30.609432] kasan_set_track+0x25/0x30 [ 30.609810] kasan_save_free_info+0x2b/0x50 [ 30.610216] __kasan_slab_free+0x10a/0x190 [ 30.610633] kmem_cache_free+0x10d/0x4d0 [ 30.611023] rcu_core+0x8c8/0x2860 [ 30.611365] __do_softirq+0x1b7/0x7d4 [ 30.611736] [ 30.611903] Last potentially related work creation: [ 30.612355] kasan_save_stack+0x22/0x50 [ 30.612742] __kasan_record_aux_stack+0x8e/0xa0 [ 30.613183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.613674] remove_vma+0x139/0x170 [ 30.614024] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.614455] do_vmi_munmap+0x1f1/0x2b0 [ 30.614827] __vm_munmap+0x138/0x3a0 [ 30.615188] __x64_sys_munmap+0x59/0x80 [ 30.615569] do_syscall_64+0x3f/0x90 [ 30.615948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.616446] [ 30.616610] The buggy address belongs to the object at ffff888019c7e3a0 [ 30.616610] which belongs to the cache vm_area_struct of size 168 [ 30.617750] The buggy address is located 88 bytes inside of [ 30.617750] freed 168-byte region [ffff888019c7e3a0, ffff888019c7e448) [ 30.618826] [ 30.618988] The buggy address belongs to the physical page: [ 30.619496] page:000000008510db14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c7e [ 30.620346] memcg:ffff888019c74601 [ 30.620675] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.621176] page_type: 0xffffffff() [ 30.621523] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.622234] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c74601 [ 30.622936] page dumped because: kasan: bad access detected [ 30.623444] [ 30.623610] Memory state around the buggy address: [ 30.624072] ffff888019c7e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.624730] ffff888019c7e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.625388] >ffff888019c7e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.626040] ^ [ 30.626673] ffff888019c7e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.627304] ffff888019c7e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.627932] ================================================================== [ 30.628673] Disabling lock debugging due to kernel taint [ 32.399957] BUG: Bad rss-counter state mm:000000007535b915 type:MM_FILEPAGES val:33 [ 32.400962] BUG: Bad rss-counter state mm:000000007535b915 type:MM_ANONPAGES val:22 [ 32.891202] BUG: Bad rss-counter state mm:00000000de40f7cd type:MM_FILEPAGES val:33 [ 32.892199] BUG: Bad rss-counter state mm:00000000de40f7cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1704' (ECDSA) to the list of known hosts. 2023/06/20 18:52:23 fuzzer started 2023/06/20 18:52:23 dialing manager at localhost:36067 2023/06/20 18:52:23 checking machine... 2023/06/20 18:52:23 checking revisions... [ 33.665262] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:52:23 testing simple program... [ 33.710284] cgroup: Unknown subsys name 'net' [ 33.753435] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:52:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f8826d9f8f0 CR3=000000000d808000 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=2032323a32353a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a32353a3831203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110019c0f8f RBX=ffff88800ce07c48 RCX=1ffff11001a1ee60 RDX=dffffc0000000000 RSI=ffff8880159c2000 RDI=ffff88800ce07c78 RBP=ffff88800e950538 RSP=ffff8880090f7638 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880159c0000 R13=0000000000000000 R14=ffff888018c06e88 R15=ffff888018c06e40 RIP=ffffffff8184767e 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 00007fdda4771900 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=00007ffdbf226000 CR3=000000000fd0c000 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