syzkaller login: [ 30.336972] BUG: Bad rss-counter state mm:000000001d88f635 type:MM_FILEPAGES val:33 [ 30.337669] BUG: Bad rss-counter state mm:000000001d88f635 type:MM_ANONPAGES val:22 [ 30.464694] ================================================================== [ 30.465650] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.466613] Read of size 8 at addr ffff88801012e310 by task sshd/220 [ 30.467386] [ 30.467610] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.468674] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.469702] Call Trace: [ 30.470036] [ 30.470353] dump_stack_lvl+0x91/0xf0 [ 30.470857] print_report+0xcc/0x620 [ 30.471355] ? __virt_addr_valid+0x102/0x340 [ 30.471921] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.472593] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.473218] kasan_report+0xbe/0xf0 [ 30.473710] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.474348] vma_interval_tree_remove+0xc75/0xec0 [ 30.474973] vma_prepare+0xc54/0x11a0 [ 30.475460] __split_vma+0x5af/0x950 [ 30.475940] ? __pfx___split_vma+0x10/0x10 [ 30.476469] ? find_held_lock+0x2c/0x110 [ 30.477041] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.477615] ? lock_is_held_type+0x9f/0x120 [ 30.478156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.478773] ? mtree_range_walk+0x632/0x900 [ 30.479327] ? mas_walk+0x5c7/0x7c0 [ 30.479792] do_vmi_munmap+0x1f1/0x2b0 [ 30.480282] mmap_region+0x1f9/0x2660 [ 30.480791] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.481308] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.482024] ? __pfx_lock_acquire+0x10/0x10 [ 30.482559] ? __pfx_mmap_region+0x10/0x10 [ 30.483092] ? security_mmap_addr+0x7d/0xa0 [ 30.483630] ? get_unmapped_area+0x1f5/0x3f0 [ 30.484184] do_mmap+0x854/0xf00 [ 30.484641] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.485141] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.485705] ksys_mmap_pgoff+0x3af/0x500 [ 30.486211] do_syscall_64+0x3f/0x90 [ 30.486691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.487335] RIP: 0033:0x7f5933ba5d82 [ 30.487796] 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 [ 30.489995] RSP: 002b:00007ffec2a04e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.490915] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5933ba5d82 [ 30.491762] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5932fdf000 [ 30.492636] RBP: 00007f5932fdf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.493497] R10: 0000000000000812 R11: 0000000000000206 R12: 000055597b26fec0 [ 30.494353] R13: 00007ffec2a04eb0 R14: 00007ffec2a04ee0 R15: 00007ffec2a05240 [ 30.495208] [ 30.495495] [ 30.495712] Allocated by task 213: [ 30.496149] kasan_save_stack+0x22/0x50 [ 30.496674] kasan_set_track+0x25/0x30 [ 30.497159] __kasan_slab_alloc+0x59/0x70 [ 30.497685] kmem_cache_alloc+0x16b/0x370 [ 30.498192] vm_area_dup+0x20/0x160 [ 30.498658] __split_vma+0x170/0x950 [ 30.499110] split_vma+0xc6/0x110 [ 30.499544] mprotect_fixup+0x8d2/0xb30 [ 30.500044] do_mprotect_pkey+0x87e/0xd40 [ 30.500603] __x64_sys_mprotect+0x78/0xc0 [ 30.501127] do_syscall_64+0x3f/0x90 [ 30.501604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.502253] [ 30.502469] Freed by task 202: [ 30.502878] kasan_save_stack+0x22/0x50 [ 30.503392] kasan_set_track+0x25/0x30 [ 30.503900] kasan_save_free_info+0x2b/0x50 [ 30.504424] __kasan_slab_free+0x10a/0x190 [ 30.504969] kmem_cache_free+0x10d/0x4d0 [ 30.505485] rcu_core+0x8c8/0x2860 [ 30.505923] __do_softirq+0x1b7/0x7d4 [ 30.506402] [ 30.506622] Last potentially related work creation: [ 30.507177] kasan_save_stack+0x22/0x50 [ 30.507659] __kasan_record_aux_stack+0x8e/0xa0 [ 30.508231] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.508895] remove_vma+0x139/0x170 [ 30.509326] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.509824] do_vmi_munmap+0x1f1/0x2b0 [ 30.510247] __vm_munmap+0x138/0x3a0 [ 30.510672] __x64_sys_munmap+0x59/0x80 [ 30.511116] do_syscall_64+0x3f/0x90 [ 30.511580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.512222] [ 30.512441] The buggy address belongs to the object at ffff88801012e2b8 [ 30.512441] which belongs to the cache vm_area_struct of size 168 [ 30.513921] The buggy address is located 88 bytes inside of [ 30.513921] freed 168-byte region [ffff88801012e2b8, ffff88801012e360) [ 30.515338] [ 30.515554] The buggy address belongs to the physical page: [ 30.516190] page:00000000fbacee58 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1012e [ 30.517266] memcg:ffff88800e034901 [ 30.517668] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.518277] page_type: 0xffffffff() [ 30.518700] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.519553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e034901 [ 30.520410] page dumped because: kasan: bad access detected [ 30.521055] [ 30.521262] Memory state around the buggy address: [ 30.521818] ffff88801012e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.522643] ffff88801012e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.523469] >ffff88801012e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.524293] ^ [ 30.524776] ffff88801012e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.525597] ffff88801012e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.526407] ================================================================== [ 30.527387] Disabling lock debugging due to kernel taint [ 31.982774] BUG: Bad rss-counter state mm:00000000737bbb5b type:MM_FILEPAGES val:33 [ 31.983464] BUG: Bad rss-counter state mm:00000000737bbb5b type:MM_ANONPAGES val:22 [ 32.331024] BUG: Bad rss-counter state mm:0000000068955577 type:MM_FILEPAGES val:33 [ 32.331717] BUG: Bad rss-counter state mm:0000000068955577 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46018' (ECDSA) to the list of known hosts. 2023/06/20 08:35:45 fuzzer started 2023/06/20 08:35:45 dialing manager at localhost:44161 2023/06/20 08:35:45 checking machine... 2023/06/20 08:35:45 checking revisions... [ 32.880028] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:35:45 testing simple program... [ 32.913702] cgroup: Unknown subsys name 'net' [ 32.967752] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:35:45 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007f135c1a6600 RCX=0000000080000000 RDX=ffff8880103251c0 RSI=ffffffff813a0ad6 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88801c9ffa20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff8880103251c0 R15=ffff88800ebc0780 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 00007f135bcc3900 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=00007fb446c68b60 CR3=000000000ed50000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=ffff888008c58400 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=00007fff531fcfc8 CR3=0000000005482000 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=00007f920e9915100000559ecadc1790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000