syzkaller login: [ 30.757007] BUG: Bad rss-counter state mm:00000000f27bc731 type:MM_FILEPAGES val:33 [ 30.758009] BUG: Bad rss-counter state mm:00000000f27bc731 type:MM_ANONPAGES val:22 [ 30.921154] ================================================================== [ 30.922116] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.923106] Read of size 8 at addr ffff88800efc2880 by task sshd/219 [ 30.924088] [ 30.924331] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.925252] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.926493] Call Trace: [ 30.926880] [ 30.927248] dump_stack_lvl+0x91/0xf0 [ 30.927841] print_report+0xcc/0x620 [ 30.928412] ? __virt_addr_valid+0x102/0x340 [ 30.929064] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.929795] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.930516] kasan_report+0xbe/0xf0 [ 30.931111] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.931872] vma_interval_tree_remove+0xc75/0xec0 [ 30.932619] vma_prepare+0xc54/0x11a0 [ 30.933202] __split_vma+0x5af/0x950 [ 30.933785] ? __pfx___split_vma+0x10/0x10 [ 30.934429] ? find_held_lock+0x2c/0x110 [ 30.935092] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.935765] ? lock_is_held_type+0x9f/0x120 [ 30.936304] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.936916] ? mtree_range_walk+0x632/0x900 [ 30.937465] ? mas_walk+0x5c7/0x7c0 [ 30.937941] do_vmi_munmap+0x1f1/0x2b0 [ 30.938430] mmap_region+0x1f9/0x2660 [ 30.938917] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.939432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.940145] ? __pfx_lock_acquire+0x10/0x10 [ 30.940675] ? __pfx_mmap_region+0x10/0x10 [ 30.941205] ? security_mmap_addr+0x7d/0xa0 [ 30.941735] ? get_unmapped_area+0x1f5/0x3f0 [ 30.942278] do_mmap+0x854/0xf00 [ 30.942721] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.943229] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.943789] ksys_mmap_pgoff+0x3af/0x500 [ 30.944297] do_syscall_64+0x3f/0x90 [ 30.944775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.945420] RIP: 0033:0x7fea068fbd82 [ 30.945877] 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 [ 30.948011] RSP: 002b:00007ffc59ff6318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.948914] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea068fbd82 [ 30.949769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea05d35000 [ 30.950613] RBP: 00007fea05d35000 R08: 0000000000000009 R09: 0000000000001000 [ 30.951470] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ec9e8dec0 [ 30.952315] R13: 00007ffc59ff6330 R14: 00007ffc59ff6360 R15: 00007ffc59ff66c0 [ 30.953165] [ 30.953452] [ 30.953669] Allocated by task 212: [ 30.954100] kasan_save_stack+0x22/0x50 [ 30.954600] kasan_set_track+0x25/0x30 [ 30.955111] __kasan_slab_alloc+0x59/0x70 [ 30.955637] kmem_cache_alloc+0x16b/0x370 [ 30.956154] vm_area_dup+0x20/0x160 [ 30.956604] __split_vma+0x170/0x950 [ 30.957067] split_vma+0xc6/0x110 [ 30.957512] mprotect_fixup+0x8d2/0xb30 [ 30.958013] do_mprotect_pkey+0x87e/0xd40 [ 30.958533] __x64_sys_mprotect+0x78/0xc0 [ 30.959075] do_syscall_64+0x3f/0x90 [ 30.959549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.960206] [ 30.960423] Freed by task 202: [ 30.960821] kasan_save_stack+0x22/0x50 [ 30.961327] kasan_set_track+0x25/0x30 [ 30.961825] kasan_save_free_info+0x2b/0x50 [ 30.962361] __kasan_slab_free+0x10a/0x190 [ 30.962905] kmem_cache_free+0x10d/0x4d0 [ 30.963420] rcu_core+0x8c8/0x2860 [ 30.963870] __do_softirq+0x1b7/0x7d4 [ 30.964402] [ 30.964636] Last potentially related work creation: [ 30.965223] kasan_save_stack+0x22/0x50 [ 30.965729] __kasan_record_aux_stack+0x8e/0xa0 [ 30.966302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.966943] remove_vma+0x139/0x170 [ 30.967415] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.967975] do_vmi_munmap+0x1f1/0x2b0 [ 30.968459] __vm_munmap+0x138/0x3a0 [ 30.968932] __x64_sys_munmap+0x59/0x80 [ 30.969435] do_syscall_64+0x3f/0x90 [ 30.969910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.970549] [ 30.970764] Second to last potentially related work creation: [ 30.971448] kasan_save_stack+0x22/0x50 [ 30.971958] __kasan_record_aux_stack+0x8e/0xa0 [ 30.972534] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.973179] remove_vma+0x139/0x170 [ 30.973628] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.974197] do_vmi_munmap+0x1f1/0x2b0 [ 30.974680] mmap_region+0x1f9/0x2660 [ 30.975170] do_mmap+0x854/0xf00 [ 30.975601] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.976092] ksys_mmap_pgoff+0x3af/0x500 [ 30.976595] do_syscall_64+0x3f/0x90 [ 30.977072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977721] [ 30.977934] The buggy address belongs to the object at ffff88800efc2828 [ 30.977934] which belongs to the cache vm_area_struct of size 168 [ 30.979447] The buggy address is located 88 bytes inside of [ 30.979447] freed 168-byte region [ffff88800efc2828, ffff88800efc28d0) [ 30.980848] [ 30.981070] The buggy address belongs to the physical page: [ 30.981728] page:000000004414c07d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefc2 [ 30.982808] memcg:ffff88800de86c01 [ 30.983245] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.983889] page_type: 0xffffffff() [ 30.984333] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b4480 dead000000000006 [ 30.985253] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de86c01 [ 30.986161] page dumped because: kasan: bad access detected [ 30.986819] [ 30.987042] Memory state around the buggy address: [ 30.987629] ffff88800efc2780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.988485] ffff88800efc2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.989339] >ffff88800efc2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.990184] ^ [ 30.990594] ffff88800efc2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.991463] ffff88800efc2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.992315] ================================================================== [ 30.993228] Disabling lock debugging due to kernel taint [ 33.396988] BUG: Bad rss-counter state mm:000000002e217b61 type:MM_FILEPAGES val:33 [ 33.397977] BUG: Bad rss-counter state mm:000000002e217b61 type:MM_ANONPAGES val:22 [ 33.949293] BUG: Bad rss-counter state mm:00000000d4224c01 type:MM_FILEPAGES val:33 [ 33.950491] BUG: Bad rss-counter state mm:00000000d4224c01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38468' (ECDSA) to the list of known hosts. 2023/06/20 19:00:16 fuzzer started 2023/06/20 19:00:16 dialing manager at localhost:36067 2023/06/20 19:00:16 checking machine... 2023/06/20 19:00:16 checking revisions... [ 34.606838] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:00:16 testing simple program... [ 34.655494] cgroup: Unknown subsys name 'net' [ 34.711321] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:00:16 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888016e9f3a8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88800eb98000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce3d1a0 R15=0000000000000000 RIP=ffffffff8180f189 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 00007f84af3ea900 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=00007f84af9a1618 CR3=000000001a1fa000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f5dcf8641d0 CR3=000000000ca40000 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=e75acf2449be6fb2934955dbfd8cbcd2 XMM02=000000000011a9b8ec2efd57dc4c00df XMM03=00000000001222289d8afda62b6f1042 XMM04=f04ba57612c751b700000000000ae988 XMM05=ffc516b584558c990000000000134220 XMM06=806171799158d96700000000001332c0 XMM07=e042d86d42eb936e00000000001224a8 XMM08=9d8afda62b6f1042000000000011aa18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000