syzkaller login: [ 36.911182] BUG: Bad rss-counter state mm:000000008c0a0952 type:MM_FILEPAGES val:33 [ 36.912671] BUG: Bad rss-counter state mm:000000008c0a0952 type:MM_ANONPAGES val:22 [ 37.085297] ================================================================== [ 37.086405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.087509] Read of size 8 at addr ffff88801a981b38 by task sshd/221 [ 37.088511] [ 37.088769] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.089816] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.090787] Call Trace: [ 37.091102] [ 37.091383] dump_stack_lvl+0x91/0xf0 [ 37.091900] print_report+0xcc/0x620 [ 37.092381] ? __virt_addr_valid+0x102/0x340 [ 37.092925] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.093548] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.094160] kasan_report+0xbe/0xf0 [ 37.094629] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.095248] vma_interval_tree_remove+0xc75/0xec0 [ 37.095885] vma_prepare+0xc54/0x11a0 [ 37.096365] __split_vma+0x5af/0x950 [ 37.096834] ? __pfx___split_vma+0x10/0x10 [ 37.097372] ? find_held_lock+0x2c/0x110 [ 37.097907] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.098467] ? lock_is_held_type+0x9f/0x120 [ 37.098997] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.099591] ? mtree_range_walk+0x632/0x900 [ 37.100179] ? mas_walk+0x5c7/0x7c0 [ 37.100658] do_vmi_munmap+0x1f1/0x2b0 [ 37.101146] mmap_region+0x1f9/0x2660 [ 37.101648] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.102159] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.102865] ? __pfx_lock_acquire+0x10/0x10 [ 37.103396] ? __pfx_mmap_region+0x10/0x10 [ 37.103956] ? security_mmap_addr+0x7d/0xa0 [ 37.104487] ? get_unmapped_area+0x1f5/0x3f0 [ 37.105031] do_mmap+0x854/0xf00 [ 37.105484] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.105972] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.106534] ksys_mmap_pgoff+0x3af/0x500 [ 37.107039] do_syscall_64+0x3f/0x90 [ 37.107508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.108178] RIP: 0033:0x7fd123b72d82 [ 37.108633] 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 [ 37.110754] RSP: 002b:00007ffc3f739588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.111658] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd123b72d82 [ 37.112532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd122fac000 [ 37.113385] RBP: 00007fd122fac000 R08: 0000000000000009 R09: 0000000000001000 [ 37.114225] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d7a644b20 [ 37.115080] R13: 00007ffc3f7395a0 R14: 00007ffc3f7395d0 R15: 00007ffc3f739930 [ 37.115963] [ 37.116254] [ 37.116469] Allocated by task 214: [ 37.116896] kasan_save_stack+0x22/0x50 [ 37.117420] kasan_set_track+0x25/0x30 [ 37.117916] __kasan_slab_alloc+0x59/0x70 [ 37.118445] kmem_cache_alloc+0x16b/0x370 [ 37.118963] vm_area_dup+0x20/0x160 [ 37.119410] __split_vma+0x170/0x950 [ 37.119913] split_vma+0xc6/0x110 [ 37.120350] mprotect_fixup+0x8d2/0xb30 [ 37.120848] do_mprotect_pkey+0x87e/0xd40 [ 37.121391] __x64_sys_mprotect+0x78/0xc0 [ 37.121911] do_syscall_64+0x3f/0x90 [ 37.122381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.123028] [ 37.123247] Freed by task 204: [ 37.123634] kasan_save_stack+0x22/0x50 [ 37.124164] kasan_set_track+0x25/0x30 [ 37.124651] kasan_save_free_info+0x2b/0x50 [ 37.125194] __kasan_slab_free+0x10a/0x190 [ 37.125731] kmem_cache_free+0x10d/0x4d0 [ 37.126241] rcu_core+0x8c8/0x2860 [ 37.126690] __do_softirq+0x1b7/0x7d4 [ 37.127170] [ 37.127383] Last potentially related work creation: [ 37.127996] kasan_save_stack+0x22/0x50 [ 37.128499] __kasan_record_aux_stack+0x8e/0xa0 [ 37.129096] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.129768] remove_vma+0x139/0x170 [ 37.130220] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.130779] do_vmi_munmap+0x1f1/0x2b0 [ 37.131269] __vm_munmap+0x138/0x3a0 [ 37.131757] __x64_sys_munmap+0x59/0x80 [ 37.132280] do_syscall_64+0x3f/0x90 [ 37.132755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.133406] [ 37.133619] The buggy address belongs to the object at ffff88801a981ae0 [ 37.133619] which belongs to the cache vm_area_struct of size 168 [ 37.135102] The buggy address is located 88 bytes inside of [ 37.135102] freed 168-byte region [ffff88801a981ae0, ffff88801a981b88) [ 37.136546] [ 37.136765] The buggy address belongs to the physical page: [ 37.137439] page:0000000011e5b6b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a981 [ 37.138537] memcg:ffff88800de34501 [ 37.138968] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.139620] page_type: 0xffffffff() [ 37.140099] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.141003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de34501 [ 37.141925] page dumped because: kasan: bad access detected [ 37.142580] [ 37.142796] Memory state around the buggy address: [ 37.143370] ffff88801a981a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.144257] ffff88801a981a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 37.145115] >ffff88801a981b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.145982] ^ [ 37.146593] ffff88801a981b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 37.147441] ffff88801a981c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.148314] ================================================================== [ 37.149359] Disabling lock debugging due to kernel taint [ 39.579264] BUG: Bad rss-counter state mm:00000000bc652621 type:MM_FILEPAGES val:33 [ 39.580437] BUG: Bad rss-counter state mm:00000000bc652621 type:MM_ANONPAGES val:22 [ 40.079267] BUG: Bad rss-counter state mm:000000006d630343 type:MM_FILEPAGES val:33 [ 40.080450] BUG: Bad rss-counter state mm:000000006d630343 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32052' (ECDSA) to the list of known hosts. 2023/06/19 18:19:44 fuzzer started 2023/06/19 18:19:44 dialing manager at localhost:44161 2023/06/19 18:19:44 checking machine... 2023/06/19 18:19:44 checking revisions... [ 40.813465] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:19:44 testing simple program... [ 40.868009] cgroup: Unknown subsys name 'net' [ 40.905792] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:19:38 Registers: info registers vcpu 0 RAX=00000000000b4fb9 RBX=0000000000000001 RCX=ffffffff84506c7e RDX=000000000000000d RSI=ffffffff864b0222 RDI=ffffffff8604d2b8 RBP=ffff88800e917858 RSP=ffff88800e917780 R8 =ffffffff864b0222 R9 =ffff88800e917840 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800e917860 R13=ffff88800e917848 R14=ffff88800e917841 R15=ffff88800e917800 RIP=ffffffff8112fc12 RFL=00000212 [----A--] 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 00007f44e0cf9900 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=00007f44e12ae650 CR3=000000000fb70000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=0000000000000000 RBX=0000000000000001 RCX=ffffffff86137736 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801474f6a0 RSP=ffff88801474f5d8 R8 =ffffffff8613773a R9 =ffff88801474f688 R10=0000000000038001 R11=0000000000020de7 R12=ffff88801474f6a8 R13=ffff88801474f690 R14=0000000000000015 R15=ffff88801474f648 RIP=ffffffff81130b17 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 00007f20e8ae7900 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=00007f20e7f06710 CR3=0000000008ed6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d22aa110b8dcccbb00000000000ae988 XMM05=7d2c9983a31eb94900000000001352a0 XMM06=c291bd5c70af25b90000000000134090 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000