syzkaller login: [ 38.748096] BUG: Bad rss-counter state mm:000000002302e9b2 type:MM_FILEPAGES val:33 [ 38.749211] BUG: Bad rss-counter state mm:000000002302e9b2 type:MM_ANONPAGES val:22 [ 38.921103] ================================================================== [ 38.922198] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.923328] Read of size 8 at addr ffff8880100dc310 by task sshd/219 [ 38.924383] [ 38.924644] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.925674] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.926868] Call Trace: [ 38.927257] [ 38.927610] dump_stack_lvl+0x91/0xf0 [ 38.928200] print_report+0xcc/0x620 [ 38.928775] ? __virt_addr_valid+0x102/0x340 [ 38.929510] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.930409] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.931168] kasan_report+0xbe/0xf0 [ 38.931754] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.932499] vma_interval_tree_remove+0xc75/0xec0 [ 38.933217] vma_prepare+0xc54/0x11a0 [ 38.933788] __split_vma+0x5af/0x950 [ 38.934353] ? __pfx___split_vma+0x10/0x10 [ 38.934993] ? find_held_lock+0x2c/0x110 [ 38.935635] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.936307] ? lock_is_held_type+0x9f/0x120 [ 38.936950] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.937671] ? mtree_range_walk+0x632/0x900 [ 38.938335] ? mas_walk+0x5c7/0x7c0 [ 38.938898] do_vmi_munmap+0x1f1/0x2b0 [ 38.939485] mmap_region+0x1f9/0x2660 [ 38.940079] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.940687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.941548] ? __pfx_lock_acquire+0x10/0x10 [ 38.942186] ? __pfx_mmap_region+0x10/0x10 [ 38.942825] ? security_mmap_addr+0x7d/0xa0 [ 38.943447] ? get_unmapped_area+0x1f5/0x3f0 [ 38.944117] do_mmap+0x854/0xf00 [ 38.944642] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.945234] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.945904] ksys_mmap_pgoff+0x3af/0x500 [ 38.946510] do_syscall_64+0x3f/0x90 [ 38.947080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.947857] RIP: 0033:0x7f74d4c95d82 [ 38.948404] 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 [ 38.950930] RSP: 002b:00007ffd46522058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.952022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74d4c95d82 [ 38.953037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74d40cf000 [ 38.954054] RBP: 00007f74d40cf000 R08: 0000000000000009 R09: 0000000000001000 [ 38.955062] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f8ab60ec0 [ 38.956076] R13: 00007ffd46522070 R14: 00007ffd465220a0 R15: 00007ffd46522400 [ 38.957110] [ 38.957457] [ 38.957709] Allocated by task 212: [ 38.958221] kasan_save_stack+0x22/0x50 [ 38.958815] kasan_set_track+0x25/0x30 [ 38.959401] __kasan_slab_alloc+0x59/0x70 [ 38.960035] kmem_cache_alloc+0x16b/0x370 [ 38.960658] vm_area_dup+0x20/0x160 [ 38.961198] __split_vma+0x170/0x950 [ 38.961741] split_vma+0xc6/0x110 [ 38.962259] mprotect_fixup+0x8d2/0xb30 [ 38.962857] do_mprotect_pkey+0x87e/0xd40 [ 38.963481] __x64_sys_mprotect+0x78/0xc0 [ 38.964104] do_syscall_64+0x3f/0x90 [ 38.964664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.965505] [ 38.965759] Freed by task 212: [ 38.966222] kasan_save_stack+0x22/0x50 [ 38.966821] kasan_set_track+0x25/0x30 [ 38.967410] kasan_save_free_info+0x2b/0x50 [ 38.968065] __kasan_slab_free+0x10a/0x190 [ 38.968691] kmem_cache_free+0x10d/0x4d0 [ 38.969294] rcu_core+0x8c8/0x2860 [ 38.969819] __do_softirq+0x1b7/0x7d4 [ 38.970382] [ 38.970634] Last potentially related work creation: [ 38.971323] kasan_save_stack+0x22/0x50 [ 38.971924] __kasan_record_aux_stack+0x8e/0xa0 [ 38.972590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.973342] remove_vma+0x139/0x170 [ 38.973878] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.974538] do_vmi_munmap+0x1f1/0x2b0 [ 38.975119] __vm_munmap+0x138/0x3a0 [ 38.975679] __x64_sys_munmap+0x59/0x80 [ 38.976270] do_syscall_64+0x3f/0x90 [ 38.976821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.977586] [ 38.977840] Second to last potentially related work creation: [ 38.978655] kasan_save_stack+0x22/0x50 [ 38.979261] __kasan_record_aux_stack+0x8e/0xa0 [ 38.979971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.980650] remove_vma+0x139/0x170 [ 38.981108] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.981678] do_vmi_munmap+0x1f1/0x2b0 [ 38.982171] mmap_region+0x1f9/0x2660 [ 38.982655] do_mmap+0x854/0xf00 [ 38.983097] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.983602] ksys_mmap_pgoff+0x3af/0x500 [ 38.984105] do_syscall_64+0x3f/0x90 [ 38.984586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.985243] [ 38.985463] The buggy address belongs to the object at ffff8880100dc2b8 [ 38.985463] which belongs to the cache vm_area_struct of size 168 [ 38.986921] The buggy address is located 88 bytes inside of [ 38.986921] freed 168-byte region [ffff8880100dc2b8, ffff8880100dc360) [ 38.988345] [ 38.988565] The buggy address belongs to the physical page: [ 38.989231] page:00000000793311c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100dc [ 38.990330] memcg:ffff88800c8cd301 [ 38.990758] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.991409] page_type: 0xffffffff() [ 38.991879] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ba700 dead000000000002 [ 38.992915] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c8cd301 [ 38.993991] page dumped because: kasan: bad access detected [ 38.994772] [ 38.995024] Memory state around the buggy address: [ 38.995730] ffff8880100dc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.996905] ffff8880100dc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.997930] >ffff8880100dc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.998934] ^ [ 38.999484] ffff8880100dc380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.000517] ffff8880100dc400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.001518] ================================================================== [ 39.002659] Disabling lock debugging due to kernel taint [ 41.921126] BUG: Bad rss-counter state mm:00000000ef0d769a type:MM_FILEPAGES val:33 [ 41.922297] BUG: Bad rss-counter state mm:00000000ef0d769a type:MM_ANONPAGES val:22 [ 42.368161] BUG: Bad rss-counter state mm:00000000a456e82b type:MM_FILEPAGES val:33 [ 42.369338] BUG: Bad rss-counter state mm:00000000a456e82b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22504' (ECDSA) to the list of known hosts. 2023/06/20 13:19:27 fuzzer started 2023/06/20 13:19:27 dialing manager at localhost:36067 2023/06/20 13:19:28 checking machine... 2023/06/20 13:19:28 checking revisions... [ 43.077761] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:19:28 testing simple program... [ 43.125415] cgroup: Unknown subsys name 'net' [ 43.164586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:19:27 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000063648 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810711 RBP=ffff88800844f780 RSP=ffff88806ce09e00 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=0000000000000001 R14=ffffffff813782f8 R15=ffff88800d697c60 RIP=ffffffff84511935 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 00007fc533c43900 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=00007fc5341fa618 CR3=0000000015c7e000 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=ffff888008c04400 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=00007f858468f0d0 CR3=0000000008c70000 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=813ff310dd389eb95f46e6108d8012f7 XMM02=000000000011b570ec2efd57dc4c00df XMM03=0000000000121f10b2301e2a3c39b761 XMM04=3b03b1af59d5880a00000000000ae988 XMM05=19e9129bd510f2350000000000133898 XMM06=4fda316b135da52b0000000000133720 XMM07=e042d86d42eb936e00000000001221e8 XMM08=b2301e2a3c39b761000000000011b5d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000