syzkaller login: [ 30.436283] BUG: Bad rss-counter state mm:00000000492fcdce type:MM_FILEPAGES val:33 [ 30.437458] BUG: Bad rss-counter state mm:00000000492fcdce type:MM_ANONPAGES val:22 [ 30.551606] ================================================================== [ 30.552716] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.553961] Read of size 8 at addr ffff88800e669d08 by task sshd/218 [ 30.555023] [ 30.555257] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.556229] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.557254] Call Trace: [ 30.557593] [ 30.557891] dump_stack_lvl+0x91/0xf0 [ 30.558419] print_report+0xcc/0x620 [ 30.558927] ? __virt_addr_valid+0x102/0x340 [ 30.559515] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.560159] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.560818] kasan_report+0xbe/0xf0 [ 30.561326] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.561988] vma_interval_tree_remove+0xc75/0xec0 [ 30.562653] vma_prepare+0xc54/0x11a0 [ 30.563172] __split_vma+0x5af/0x950 [ 30.563683] ? __pfx___split_vma+0x10/0x10 [ 30.564248] ? find_held_lock+0x2c/0x110 [ 30.564803] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.565411] ? lock_is_held_type+0x9f/0x120 [ 30.565989] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.566646] ? mtree_range_walk+0x632/0x900 [ 30.567244] ? mas_walk+0x5c7/0x7c0 [ 30.567759] do_vmi_munmap+0x1f1/0x2b0 [ 30.568285] mmap_region+0x1f9/0x2660 [ 30.568806] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.569361] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.570156] ? __pfx_lock_acquire+0x10/0x10 [ 30.570750] ? __pfx_mmap_region+0x10/0x10 [ 30.571313] ? security_mmap_addr+0x7d/0xa0 [ 30.571875] ? get_unmapped_area+0x1f5/0x3f0 [ 30.572457] do_mmap+0x854/0xf00 [ 30.572922] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.573445] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.574038] ksys_mmap_pgoff+0x3af/0x500 [ 30.574595] do_syscall_64+0x3f/0x90 [ 30.575105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.575787] RIP: 0033:0x7f3bac3bad82 [ 30.576274] 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 [ 30.578550] RSP: 002b:00007fffc00e80c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.579546] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bac3bad82 [ 30.580479] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bab7f4000 [ 30.581413] RBP: 00007f3bab7f4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.582355] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654856d5ec0 [ 30.583282] R13: 00007fffc00e80e0 R14: 00007fffc00e8110 R15: 00007fffc00e8470 [ 30.584230] [ 30.584551] [ 30.584787] Allocated by task 211: [ 30.585256] kasan_save_stack+0x22/0x50 [ 30.585807] kasan_set_track+0x25/0x30 [ 30.586371] __kasan_slab_alloc+0x59/0x70 [ 30.586948] kmem_cache_alloc+0x16b/0x370 [ 30.587514] vm_area_dup+0x20/0x160 [ 30.588014] __split_vma+0x170/0x950 [ 30.588522] split_vma+0xc6/0x110 [ 30.589144] mprotect_fixup+0x8d2/0xb30 [ 30.589731] do_mprotect_pkey+0x87e/0xd40 [ 30.590312] __x64_sys_mprotect+0x78/0xc0 [ 30.590902] do_syscall_64+0x3f/0x90 [ 30.591423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.592123] [ 30.592358] Freed by task 211: [ 30.592783] kasan_save_stack+0x22/0x50 [ 30.593344] kasan_set_track+0x25/0x30 [ 30.593886] kasan_save_free_info+0x2b/0x50 [ 30.594488] __kasan_slab_free+0x10a/0x190 [ 30.595073] kmem_cache_free+0x10d/0x4d0 [ 30.595708] rcu_core+0x8c8/0x2860 [ 30.596197] __do_softirq+0x1b7/0x7d4 [ 30.596721] [ 30.596954] Last potentially related work creation: [ 30.597600] kasan_save_stack+0x22/0x50 [ 30.598153] __kasan_record_aux_stack+0x8e/0xa0 [ 30.598793] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.599495] remove_vma+0x139/0x170 [ 30.599992] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.600601] do_vmi_munmap+0x1f1/0x2b0 [ 30.601135] __vm_munmap+0x138/0x3a0 [ 30.601645] __x64_sys_munmap+0x59/0x80 [ 30.602189] do_syscall_64+0x3f/0x90 [ 30.602731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.603435] [ 30.603671] The buggy address belongs to the object at ffff88800e669cb0 [ 30.603671] which belongs to the cache vm_area_struct of size 168 [ 30.605288] The buggy address is located 88 bytes inside of [ 30.605288] freed 168-byte region [ffff88800e669cb0, ffff88800e669d58) [ 30.606845] [ 30.607082] The buggy address belongs to the physical page: [ 30.607807] page:000000000c013530 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe669 [ 30.609000] memcg:ffff88800ed1c501 [ 30.609469] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.610236] page_type: 0xffffffff() [ 30.610743] raw: 0100000000000200 ffff88800879fc80 ffffea0000361040 dead000000000007 [ 30.611750] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed1c501 [ 30.612741] page dumped because: kasan: bad access detected [ 30.613470] [ 30.613706] Memory state around the buggy address: [ 30.614369] ffff88800e669c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.615319] ffff88800e669c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.616259] >ffff88800e669d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.617202] ^ [ 30.617689] ffff88800e669d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.618643] ffff88800e669e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.619584] ================================================================== [ 30.620707] Disabling lock debugging due to kernel taint [ 32.415569] BUG: Bad rss-counter state mm:000000000f7acc20 type:MM_FILEPAGES val:33 [ 32.416521] BUG: Bad rss-counter state mm:000000000f7acc20 type:MM_ANONPAGES val:22 [ 32.815105] BUG: Bad rss-counter state mm:0000000026dcbd64 type:MM_FILEPAGES val:33 [ 32.815839] BUG: Bad rss-counter state mm:0000000026dcbd64 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14857' (ECDSA) to the list of known hosts. 2023/06/20 06:09:05 fuzzer started 2023/06/20 06:09:05 dialing manager at localhost:44161 2023/06/20 06:09:05 checking machine... 2023/06/20 06:09:05 checking revisions... [ 33.523335] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:09:05 testing simple program... [ 33.577407] cgroup: Unknown subsys name 'net' [ 33.614905] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:09:03 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888009a64740 RCX=0000000080000000 RDX=ffff888018c21b40 RSI=ffffffff83ab4021 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800c427500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000096100000961 R12=0000000000000000 R13=00000000000000e8 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 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 00007ff911ee8900 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=00007ffc23e25000 CR3=0000000010176000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f39781180a0 CR3=000000000d8d4000 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=04377713374be1a0234f51fb50404fe6 XMM02=2c67c8bc2e329bc30000000000120010 XMM03=fb795ef6d65770560000000000123f88 XMM04=162042ddac243a5e00000000000ae988 XMM05=19e9129bd510f2350000000000134208 XMM06=a934661fb79e4d060000000000133070 XMM07=e042d86d42eb936e0000000000124260 XMM08=56d5a13316e425f20000000000120070 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000