syzkaller login: [ 30.125562] BUG: Bad rss-counter state mm:000000009cfe67c2 type:MM_FILEPAGES val:33 [ 30.127318] BUG: Bad rss-counter state mm:000000009cfe67c2 type:MM_ANONPAGES val:22 [ 30.283438] ================================================================== [ 30.284549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.285831] Read of size 8 at addr ffff88800fd1da50 by task sshd/219 [ 30.286651] [ 30.286882] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.287818] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.288858] Call Trace: [ 30.289198] [ 30.289515] dump_stack_lvl+0x91/0xf0 [ 30.290039] print_report+0xcc/0x620 [ 30.290558] ? __virt_addr_valid+0x102/0x340 [ 30.291149] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.291809] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.292471] kasan_report+0xbe/0xf0 [ 30.292996] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.293729] vma_interval_tree_remove+0xc75/0xec0 [ 30.294431] vma_prepare+0xc54/0x11a0 [ 30.294985] __split_vma+0x5af/0x950 [ 30.295537] ? __pfx___split_vma+0x10/0x10 [ 30.296156] ? find_held_lock+0x2c/0x110 [ 30.296751] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.297447] ? lock_is_held_type+0x9f/0x120 [ 30.298069] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.298767] ? mtree_range_walk+0x632/0x900 [ 30.299432] ? mas_walk+0x5c7/0x7c0 [ 30.299986] do_vmi_munmap+0x1f1/0x2b0 [ 30.300554] mmap_region+0x1f9/0x2660 [ 30.301118] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.301690] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.302447] ? __pfx_lock_acquire+0x10/0x10 [ 30.303024] ? __pfx_mmap_region+0x10/0x10 [ 30.303592] ? security_mmap_addr+0x7d/0xa0 [ 30.304153] ? get_unmapped_area+0x1f5/0x3f0 [ 30.304737] do_mmap+0x854/0xf00 [ 30.305214] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.305765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.306364] ksys_mmap_pgoff+0x3af/0x500 [ 30.306904] do_syscall_64+0x3f/0x90 [ 30.307419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.308104] RIP: 0033:0x7fdce5631d82 [ 30.308592] 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 [ 30.310858] RSP: 002b:00007ffe74173778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.311814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdce5631d82 [ 30.312707] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdce4a6b000 [ 30.313617] RBP: 00007fdce4a6b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.314516] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de3bf97ec0 [ 30.315414] R13: 00007ffe74173790 R14: 00007ffe741737c0 R15: 00007ffe74173b20 [ 30.316319] [ 30.316628] [ 30.316861] Allocated by task 212: [ 30.317313] kasan_save_stack+0x22/0x50 [ 30.317874] kasan_set_track+0x25/0x30 [ 30.318399] __kasan_slab_alloc+0x59/0x70 [ 30.318975] kmem_cache_alloc+0x16b/0x370 [ 30.319535] vm_area_dup+0x20/0x160 [ 30.320018] __split_vma+0x170/0x950 [ 30.320522] split_vma+0xc6/0x110 [ 30.320995] mprotect_fixup+0x8d2/0xb30 [ 30.321532] do_mprotect_pkey+0x87e/0xd40 [ 30.322088] __x64_sys_mprotect+0x78/0xc0 [ 30.322641] do_syscall_64+0x3f/0x90 [ 30.323146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.323823] [ 30.324054] Freed by task 212: [ 30.324468] kasan_save_stack+0x22/0x50 [ 30.325008] kasan_set_track+0x25/0x30 [ 30.325549] kasan_save_free_info+0x2b/0x50 [ 30.326213] __kasan_slab_free+0x10a/0x190 [ 30.326779] kmem_cache_free+0x10d/0x4d0 [ 30.327324] rcu_core+0x8c8/0x2860 [ 30.327799] __do_softirq+0x1b7/0x7d4 [ 30.328312] [ 30.328541] Last potentially related work creation: [ 30.329163] kasan_save_stack+0x22/0x50 [ 30.329712] __kasan_record_aux_stack+0x8e/0xa0 [ 30.330321] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.331008] remove_vma+0x139/0x170 [ 30.331489] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.332078] do_vmi_munmap+0x1f1/0x2b0 [ 30.332600] __vm_munmap+0x138/0x3a0 [ 30.333098] __x64_sys_munmap+0x59/0x80 [ 30.333643] do_syscall_64+0x3f/0x90 [ 30.334146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.334825] [ 30.335058] The buggy address belongs to the object at ffff88800fd1d9f8 [ 30.335058] which belongs to the cache vm_area_struct of size 168 [ 30.336608] The buggy address is located 88 bytes inside of [ 30.336608] freed 168-byte region [ffff88800fd1d9f8, ffff88800fd1daa0) [ 30.338119] [ 30.338348] The buggy address belongs to the physical page: [ 30.339047] page:00000000134ee99c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd1d [ 30.340194] memcg:ffff88801685ea01 [ 30.340646] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.341339] page_type: 0xffffffff() [ 30.341831] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.342808] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801685ea01 [ 30.343770] page dumped because: kasan: bad access detected [ 30.344466] [ 30.344697] Memory state around the buggy address: [ 30.345308] ffff88800fd1d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.346240] ffff88800fd1d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.347156] >ffff88800fd1da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.348074] ^ [ 30.348824] ffff88800fd1da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.349746] ffff88800fd1db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.350662] ================================================================== [ 30.351929] Disabling lock debugging due to kernel taint [ 32.751401] BUG: Bad rss-counter state mm:000000009a35f87e type:MM_FILEPAGES val:33 [ 32.752502] BUG: Bad rss-counter state mm:000000009a35f87e type:MM_ANONPAGES val:22 [ 33.221140] BUG: Bad rss-counter state mm:00000000e77a7e29 type:MM_FILEPAGES val:33 [ 33.222422] BUG: Bad rss-counter state mm:00000000e77a7e29 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22810' (ECDSA) to the list of known hosts. 2023/06/20 05:22:26 fuzzer started 2023/06/20 05:22:26 dialing manager at localhost:44161 2023/06/20 05:22:26 checking machine... 2023/06/20 05:22:26 checking revisions... [ 33.967187] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:22:27 testing simple program... [ 34.020893] cgroup: Unknown subsys name 'net' [ 34.065272] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:22:25 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff88801a361b40 RSI=ffffffff83c632c0 RDI=ffffffff87f94830 RBP=0000000000000000 RSP=ffff8880167ef6a0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000f9 R11=0000096800000968 R12=0000000000000000 R13=00000000000000f9 R14=dffffc0000000000 R15=0000000000000001 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 00007f296f384900 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=00007f296f93b618 CR3=000000000c9aa000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fa42b137000 CR3=000000000c742000 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=3f7028bda5eeee82654e68fea101e26d XMM02=2c67c8bc2e329bc3000000000011ca20 XMM03=fb795ef6d65770560000000000123ef8 XMM04=f917ad0e314f428900000000000ae988 XMM05=a14a8cc65777b4d20000000000133f58 XMM06=806171799158d9670000000000133950 XMM07=e042d86d42eb936e0000000000124178 XMM08=ea922ab4a109de31000000000011ca80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000