syzkaller login: [ 35.756190] BUG: Bad rss-counter state mm:000000002ca43415 type:MM_FILEPAGES val:33 [ 35.757136] BUG: Bad rss-counter state mm:000000002ca43415 type:MM_ANONPAGES val:22 [ 35.914762] ================================================================== [ 35.915623] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.916521] Read of size 8 at addr ffff88800fc33140 by task sshd/221 [ 35.917244] [ 35.917455] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.918332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.919324] Call Trace: [ 35.919628] [ 35.919924] dump_stack_lvl+0x91/0xf0 [ 35.920390] print_report+0xcc/0x620 [ 35.920853] ? __virt_addr_valid+0x102/0x340 [ 35.921377] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.921967] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.922554] kasan_report+0xbe/0xf0 [ 35.923007] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.923596] vma_interval_tree_remove+0xc75/0xec0 [ 35.924306] vma_prepare+0xc54/0x11a0 [ 35.924863] __split_vma+0x5af/0x950 [ 35.925399] ? __pfx___split_vma+0x10/0x10 [ 35.925991] ? find_held_lock+0x2c/0x110 [ 35.926583] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.927207] ? lock_is_held_type+0x9f/0x120 [ 35.927822] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.928493] ? mtree_range_walk+0x632/0x900 [ 35.929100] ? mas_walk+0x5c7/0x7c0 [ 35.929627] do_vmi_munmap+0x1f1/0x2b0 [ 35.930169] mmap_region+0x1f9/0x2660 [ 35.930708] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.931282] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.932077] ? __pfx_lock_acquire+0x10/0x10 [ 35.932671] ? __pfx_mmap_region+0x10/0x10 [ 35.933210] ? security_mmap_addr+0x7d/0xa0 [ 35.933749] ? get_unmapped_area+0x1f5/0x3f0 [ 35.934298] do_mmap+0x854/0xf00 [ 35.934740] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.935240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.935811] ksys_mmap_pgoff+0x3af/0x500 [ 35.936325] do_syscall_64+0x3f/0x90 [ 35.936802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.937446] RIP: 0033:0x7f1ca5dc5d82 [ 35.937907] 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 [ 35.940053] RSP: 002b:00007ffcdf00ed28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.940957] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ca5dc5d82 [ 35.941815] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ca51ff000 [ 35.942669] RBP: 00007f1ca51ff000 R08: 0000000000000009 R09: 0000000000001000 [ 35.943514] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b17b2e7f70 [ 35.944374] R13: 00007ffcdf00ed40 R14: 00007ffcdf00ed70 R15: 00007ffcdf00f0d0 [ 35.945238] [ 35.945534] [ 35.945751] Allocated by task 214: [ 35.946176] kasan_save_stack+0x22/0x50 [ 35.946683] kasan_set_track+0x25/0x30 [ 35.947180] __kasan_slab_alloc+0x59/0x70 [ 35.947734] kmem_cache_alloc+0x16b/0x370 [ 35.948262] vm_area_dup+0x20/0x160 [ 35.948719] __split_vma+0x170/0x950 [ 35.949189] split_vma+0xc6/0x110 [ 35.949630] mprotect_fixup+0x8d2/0xb30 [ 35.950131] do_mprotect_pkey+0x87e/0xd40 [ 35.950651] __x64_sys_mprotect+0x78/0xc0 [ 35.951172] do_syscall_64+0x3f/0x90 [ 35.951664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.952309] [ 35.952522] Freed by task 19: [ 35.952909] kasan_save_stack+0x22/0x50 [ 35.953424] kasan_set_track+0x25/0x30 [ 35.953924] kasan_save_free_info+0x2b/0x50 [ 35.954453] __kasan_slab_free+0x10a/0x190 [ 35.954994] kmem_cache_free+0x10d/0x4d0 [ 35.955509] rcu_core+0x8c8/0x2860 [ 35.955979] __do_softirq+0x1b7/0x7d4 [ 35.956458] [ 35.956670] Last potentially related work creation: [ 35.957255] kasan_save_stack+0x22/0x50 [ 35.957757] __kasan_record_aux_stack+0x8e/0xa0 [ 35.958328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.958969] remove_vma+0x139/0x170 [ 35.959434] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.960014] do_vmi_munmap+0x1f1/0x2b0 [ 35.960516] __vm_munmap+0x138/0x3a0 [ 35.960986] __x64_sys_munmap+0x59/0x80 [ 35.961484] do_syscall_64+0x3f/0x90 [ 35.961961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.962606] [ 35.962818] The buggy address belongs to the object at ffff88800fc330e8 [ 35.962818] which belongs to the cache vm_area_struct of size 168 [ 35.964291] The buggy address is located 88 bytes inside of [ 35.964291] freed 168-byte region [ffff88800fc330e8, ffff88800fc33190) [ 35.965698] [ 35.965915] The buggy address belongs to the physical page: [ 35.966572] page:000000000b4d9ae6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc33 [ 35.967668] memcg:ffff88800c5de801 [ 35.968100] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.968740] page_type: 0xffffffff() [ 35.969194] raw: 0100000000000200 ffff88800879fc80 ffffea0000365a80 000000000000000c [ 35.970106] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5de801 [ 35.971010] page dumped because: kasan: bad access detected [ 35.971678] [ 35.971892] Memory state around the buggy address: [ 35.972478] ffff88800fc33000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.973332] ffff88800fc33080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.974182] >ffff88800fc33100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.975035] ^ [ 35.975694] ffff88800fc33180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.976546] ffff88800fc33200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.977396] ================================================================== [ 35.978489] Disabling lock debugging due to kernel taint [ 37.996944] BUG: Bad rss-counter state mm:00000000515c1b95 type:MM_FILEPAGES val:33 [ 37.997837] BUG: Bad rss-counter state mm:00000000515c1b95 type:MM_ANONPAGES val:22 [ 38.525553] BUG: Bad rss-counter state mm:00000000612006bb type:MM_FILEPAGES val:33 [ 38.526717] BUG: Bad rss-counter state mm:00000000612006bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28839' (ECDSA) to the list of known hosts. 2023/06/20 08:30:38 fuzzer started 2023/06/20 08:30:38 dialing manager at localhost:44161 2023/06/20 08:30:38 checking machine... 2023/06/20 08:30:38 checking revisions... [ 39.183960] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:30:38 testing simple program... [ 39.237817] cgroup: Unknown subsys name 'net' [ 39.278950] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:30:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fe4700daff0 CR3=000000000c6b6000 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=a54c8c53f7584b9398402693eac023a0 XMM02=ec2efd57dc4c00df000000000011d9b8 XMM03=92558900162a3d46000000000011da88 XMM04=20edb2a96eed07e100000000000ae988 XMM05=a11d3cbf5a3c27ed0000000000135338 XMM06=e4cb8bb95a7664b600000000001341f0 XMM07=fb795ef6d657705600000000001246f8 XMM08=2c67c8bc2e329bc3000000000011da28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888014150000 RBX=ffff88801414fc68 RCX=0000000000000001 RDX=ffff88801414fc70 RSI=ffff88801414fc58 RDI=ffff88801414f898 RBP=ffff888014148000 RSP=ffff88801414f818 R8 =0000000000000001 R9 =ffff88801414f8c8 R10=0000000000038001 R11=0000000000020c48 R12=ffff88801414f8e8 R13=ffff88801414f8d0 R14=ffff88801414fc58 R15=ffff88801414f888 RIP=ffffffff81131296 RFL=00000287 [--S--PC] 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 00007f26a09a7900 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=00007f26a0f5e618 CR3=000000000bbcc000 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=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