syzkaller login: [ 28.700156] BUG: Bad rss-counter state mm:00000000242a5c70 type:MM_FILEPAGES val:33 [ 28.701302] BUG: Bad rss-counter state mm:00000000242a5c70 type:MM_ANONPAGES val:22 [ 28.885138] ================================================================== [ 28.886056] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.886995] Read of size 8 at addr ffff8880101d33f8 by task sshd/219 [ 28.887817] [ 28.888035] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.889075] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.890071] Call Trace: [ 28.890393] [ 28.890683] dump_stack_lvl+0x91/0xf0 [ 28.891184] print_report+0xcc/0x620 [ 28.891681] ? __virt_addr_valid+0x102/0x340 [ 28.892237] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.892854] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.893475] kasan_report+0xbe/0xf0 [ 28.893948] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.894573] vma_interval_tree_remove+0xc75/0xec0 [ 28.895186] vma_prepare+0xc54/0x11a0 [ 28.895694] __split_vma+0x5af/0x950 [ 28.896175] ? __pfx___split_vma+0x10/0x10 [ 28.896710] ? find_held_lock+0x2c/0x110 [ 28.897236] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.897801] ? lock_is_held_type+0x9f/0x120 [ 28.898342] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.898961] ? mtree_range_walk+0x632/0x900 [ 28.899524] ? mas_walk+0x5c7/0x7c0 [ 28.900022] do_vmi_munmap+0x1f1/0x2b0 [ 28.900519] mmap_region+0x1f9/0x2660 [ 28.901006] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.901525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.902246] ? __pfx_lock_acquire+0x10/0x10 [ 28.902786] ? __pfx_mmap_region+0x10/0x10 [ 28.903328] ? security_mmap_addr+0x7d/0xa0 [ 28.903882] ? get_unmapped_area+0x1f5/0x3f0 [ 28.904449] do_mmap+0x854/0xf00 [ 28.904898] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.905411] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.905973] ksys_mmap_pgoff+0x3af/0x500 [ 28.906480] do_syscall_64+0x3f/0x90 [ 28.906961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.907629] RIP: 0033:0x7f8484a13d82 [ 28.908087] 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 [ 28.910260] RSP: 002b:00007ffd32ed0138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.911183] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8484a13d82 [ 28.912050] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8483e4d000 [ 28.912899] RBP: 00007f8483e4d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.913742] R10: 0000000000000812 R11: 0000000000000206 R12: 000055795fb2cec0 [ 28.914586] R13: 00007ffd32ed0150 R14: 00007ffd32ed0180 R15: 00007ffd32ed04e0 [ 28.915448] [ 28.915753] [ 28.915971] Allocated by task 212: [ 28.916404] kasan_save_stack+0x22/0x50 [ 28.916919] kasan_set_track+0x25/0x30 [ 28.917411] __kasan_slab_alloc+0x59/0x70 [ 28.917936] kmem_cache_alloc+0x16b/0x370 [ 28.918450] vm_area_dup+0x20/0x160 [ 28.918905] __split_vma+0x170/0x950 [ 28.919374] split_vma+0xc6/0x110 [ 28.919834] mprotect_fixup+0x8d2/0xb30 [ 28.920339] do_mprotect_pkey+0x87e/0xd40 [ 28.920861] __x64_sys_mprotect+0x78/0xc0 [ 28.921383] do_syscall_64+0x3f/0x90 [ 28.921861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.922503] [ 28.922720] Freed by task 19: [ 28.923102] kasan_save_stack+0x22/0x50 [ 28.923611] kasan_set_track+0x25/0x30 [ 28.924109] kasan_save_free_info+0x2b/0x50 [ 28.924638] __kasan_slab_free+0x10a/0x190 [ 28.925178] kmem_cache_free+0x10d/0x4d0 [ 28.925682] rcu_core+0x8c8/0x2860 [ 28.926130] __do_softirq+0x1b7/0x7d4 [ 28.926608] [ 28.926826] Last potentially related work creation: [ 28.927416] kasan_save_stack+0x22/0x50 [ 28.927930] __kasan_record_aux_stack+0x8e/0xa0 [ 28.928505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.929149] remove_vma+0x139/0x170 [ 28.929604] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.930160] do_vmi_munmap+0x1f1/0x2b0 [ 28.930649] __vm_munmap+0x138/0x3a0 [ 28.931118] __x64_sys_munmap+0x59/0x80 [ 28.931631] do_syscall_64+0x3f/0x90 [ 28.932108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.932752] [ 28.932968] Second to last potentially related work creation: [ 28.933651] kasan_save_stack+0x22/0x50 [ 28.934154] __kasan_record_aux_stack+0x8e/0xa0 [ 28.934720] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.935359] remove_vma+0x139/0x170 [ 28.935826] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.936384] do_vmi_munmap+0x1f1/0x2b0 [ 28.936873] mmap_region+0x1f9/0x2660 [ 28.937354] do_mmap+0x854/0xf00 [ 28.937788] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.938278] ksys_mmap_pgoff+0x3af/0x500 [ 28.938781] do_syscall_64+0x3f/0x90 [ 28.939256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.939916] [ 28.940129] The buggy address belongs to the object at ffff8880101d33a0 [ 28.940129] which belongs to the cache vm_area_struct of size 168 [ 28.941589] The buggy address is located 88 bytes inside of [ 28.941589] freed 168-byte region [ffff8880101d33a0, ffff8880101d3448) [ 28.942993] [ 28.943212] The buggy address belongs to the physical page: [ 28.943873] page:0000000069509954 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101d3 [ 28.944978] memcg:ffff8880099c9801 [ 28.945404] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.946103] page_type: 0xffffffff() [ 28.946552] raw: 0100000000000200 ffff8880087a0c80 ffffea0000357dc0 dead000000000003 [ 28.947476] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099c9801 [ 28.948389] page dumped because: kasan: bad access detected [ 28.949051] [ 28.949268] Memory state around the buggy address: [ 28.949854] ffff8880101d3280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 28.950707] ffff8880101d3300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 28.951570] >ffff8880101d3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.952434] ^ [ 28.953274] ffff8880101d3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.954128] ffff8880101d3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.954971] ================================================================== [ 28.955951] Disabling lock debugging due to kernel taint [ 31.457768] BUG: Bad rss-counter state mm:00000000e30371cc type:MM_FILEPAGES val:33 [ 31.459131] BUG: Bad rss-counter state mm:00000000e30371cc type:MM_ANONPAGES val:22 [ 31.947221] BUG: Bad rss-counter state mm:0000000054f8dca9 type:MM_FILEPAGES val:33 [ 31.948371] BUG: Bad rss-counter state mm:0000000054f8dca9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14269' (ECDSA) to the list of known hosts. 2023/06/21 07:16:41 fuzzer started 2023/06/21 07:16:42 dialing manager at localhost:36067 2023/06/21 07:16:42 checking machine... 2023/06/21 07:16:42 checking revisions... [ 32.669196] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:16:42 testing simple program... [ 32.719483] cgroup: Unknown subsys name 'net' [ 32.762354] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:16:41 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=00007ffc86aa2a38 CR3=000000000e382000 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=2031343a36313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a36313a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff1100d9e135e RDX=dffffc0000000000 RSI=ffffffff83640612 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008a84f R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130706 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 00007fac4a26a900 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=00007fac4a821618 CR3=0000000010296000 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=563412feff00545000000000000080fe 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