syzkaller login: [ 30.846137] BUG: Bad rss-counter state mm:0000000086fc9033 type:MM_FILEPAGES val:33 [ 30.847428] BUG: Bad rss-counter state mm:0000000086fc9033 type:MM_ANONPAGES val:22 [ 30.879056] ================================================================== [ 30.879764] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.880649] Read of size 8 at addr ffff88801aa0e880 by task sshd/220 [ 30.881242] [ 30.881440] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.882293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.883049] Call Trace: [ 30.883304] [ 30.883524] dump_stack_lvl+0x91/0xf0 [ 30.883901] print_report+0xcc/0x620 [ 30.884466] ? __virt_addr_valid+0x102/0x340 [ 30.884894] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885370] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885844] kasan_report+0xbe/0xf0 [ 30.886214] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.886694] vma_interval_tree_remove+0xc75/0xec0 [ 30.887160] vma_prepare+0xc54/0x11a0 [ 30.887537] __split_vma+0x5af/0x950 [ 30.887902] ? __pfx___split_vma+0x10/0x10 [ 30.888310] ? find_held_lock+0x2c/0x110 [ 30.888724] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.889161] ? lock_is_held_type+0x9f/0x120 [ 30.889578] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.890045] ? mtree_range_walk+0x632/0x900 [ 30.890478] ? mas_walk+0x5c7/0x7c0 [ 30.890850] do_vmi_munmap+0x1f1/0x2b0 [ 30.891230] mmap_region+0x1f9/0x2660 [ 30.891603] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.892008] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.892581] ? __pfx_lock_acquire+0x10/0x10 [ 30.892996] ? __pfx_mmap_region+0x10/0x10 [ 30.893407] ? security_mmap_addr+0x7d/0xa0 [ 30.893805] ? get_unmapped_area+0x1f5/0x3f0 [ 30.894208] do_mmap+0x854/0xf00 [ 30.894534] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.894898] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.895311] ksys_mmap_pgoff+0x3af/0x500 [ 30.895684] do_syscall_64+0x3f/0x90 [ 30.896033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.896512] RIP: 0033:0x7f8b19c02d82 [ 30.896849] 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 [ 30.898410] RSP: 002b:00007ffe2790fbb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.899078] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b19c02d82 [ 30.899701] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b1903c000 [ 30.900313] RBP: 00007f8b1903c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.900947] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608a80b8ec0 [ 30.901566] R13: 00007ffe2790fbd0 R14: 00007ffe2790fc00 R15: 00007ffe2790ff60 [ 30.902202] [ 30.902415] [ 30.902571] Allocated by task 213: [ 30.902883] kasan_save_stack+0x22/0x50 [ 30.903250] kasan_set_track+0x25/0x30 [ 30.903623] __kasan_slab_alloc+0x59/0x70 [ 30.904001] kmem_cache_alloc+0x16b/0x370 [ 30.904389] vm_area_dup+0x20/0x160 [ 30.904724] __split_vma+0x170/0x950 [ 30.905069] split_vma+0xc6/0x110 [ 30.905387] mprotect_fixup+0x8d2/0xb30 [ 30.905758] do_mprotect_pkey+0x87e/0xd40 [ 30.906137] __x64_sys_mprotect+0x78/0xc0 [ 30.906521] do_syscall_64+0x3f/0x90 [ 30.906870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.907340] [ 30.907495] Freed by task 203: [ 30.907781] kasan_save_stack+0x22/0x50 [ 30.908150] kasan_set_track+0x25/0x30 [ 30.908518] kasan_save_free_info+0x2b/0x50 [ 30.908910] __kasan_slab_free+0x10a/0x190 [ 30.909298] kmem_cache_free+0x10d/0x4d0 [ 30.909670] rcu_core+0x8c8/0x2860 [ 30.909995] __do_softirq+0x1b7/0x7d4 [ 30.910346] [ 30.910502] Last potentially related work creation: [ 30.910931] kasan_save_stack+0x22/0x50 [ 30.911296] __kasan_record_aux_stack+0x8e/0xa0 [ 30.911709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.912175] remove_vma+0x139/0x170 [ 30.912511] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.912917] do_vmi_munmap+0x1f1/0x2b0 [ 30.913269] __vm_munmap+0x138/0x3a0 [ 30.913619] __x64_sys_munmap+0x59/0x80 [ 30.913981] do_syscall_64+0x3f/0x90 [ 30.914326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914801] [ 30.914956] The buggy address belongs to the object at ffff88801aa0e828 [ 30.914956] which belongs to the cache vm_area_struct of size 168 [ 30.916032] The buggy address is located 88 bytes inside of [ 30.916032] freed 168-byte region [ffff88801aa0e828, ffff88801aa0e8d0) [ 30.917079] [ 30.917236] The buggy address belongs to the physical page: [ 30.917716] page:00000000c5f445ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aa0e [ 30.918512] memcg:ffff888014364e01 [ 30.918825] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.919298] page_type: 0xffffffff() [ 30.919638] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.920304] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014364e01 [ 30.920981] page dumped because: kasan: bad access detected [ 30.921465] [ 30.921620] Memory state around the buggy address: [ 30.922040] ffff88801aa0e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.922665] ffff88801aa0e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.923291] >ffff88801aa0e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.923904] ^ [ 30.924206] ffff88801aa0e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.924847] ffff88801aa0e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.925471] ================================================================== [ 30.926139] Disabling lock debugging due to kernel taint [ 33.251135] BUG: Bad rss-counter state mm:00000000a35c3587 type:MM_FILEPAGES val:33 [ 33.252290] BUG: Bad rss-counter state mm:00000000a35c3587 type:MM_ANONPAGES val:22 [ 33.642696] BUG: Bad rss-counter state mm:00000000a39f31ce type:MM_FILEPAGES val:33 [ 33.643879] BUG: Bad rss-counter state mm:00000000a39f31ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5015' (ECDSA) to the list of known hosts. 2023/06/21 00:44:18 fuzzer started 2023/06/21 00:44:18 dialing manager at localhost:36067 2023/06/21 00:44:18 checking machine... 2023/06/21 00:44:18 checking revisions... [ 34.390118] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:44:18 testing simple program... [ 34.442164] cgroup: Unknown subsys name 'net' [ 34.505992] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:44:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a70 RCX=0000000000000001 RDX=1ffff1100d9c134f RSI=ffff8880162ef850 RDI=ffff88806ce09a78 RBP=ffff8880162ef850 RSP=ffff88806ce099c8 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b5305 R12=0000000000000008 R13=ffff88806ce09ab8 R14=ffff8880162ef850 R15=ffff88806ce09a70 RIP=ffffffff81130445 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 00007f5e0fa29900 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=00007f5e0ffe0618 CR3=000000000e570000 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=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 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=00007f285b0d63f0 CR3=000000000904e000 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=f5d2e5e2ace15587a84046730d152d0a XMM02=000000000011b6b8eff9b2d0a8fce9cb XMM03=000000000011b7882c67c8bc2e329bc3 XMM04=3c4f97a2f7f51e3100000000000ae988 XMM05=19e9129bd510f23500000000001322e0 XMM06=18598becc11723c90000000000131148 XMM07=e042d86d42eb936e0000000000122708 XMM08=1dd34f0c32dc2feb000000000011b788 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000