syzkaller login: [ 31.183460] BUG: Bad rss-counter state mm:00000000d50d5594 type:MM_FILEPAGES val:33 [ 31.184600] BUG: Bad rss-counter state mm:00000000d50d5594 type:MM_ANONPAGES val:22 [ 31.342908] ================================================================== [ 31.344019] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.345167] Read of size 8 at addr ffff888018c236b0 by task sshd/220 [ 31.346099] [ 31.346447] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.347495] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.348684] Call Trace: [ 31.349100] [ 31.349443] dump_stack_lvl+0x91/0xf0 [ 31.349963] print_report+0xcc/0x620 [ 31.350456] ? __virt_addr_valid+0x102/0x340 [ 31.351025] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.351664] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352303] kasan_report+0xbe/0xf0 [ 31.352792] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353454] vma_interval_tree_remove+0xc75/0xec0 [ 31.354075] vma_prepare+0xc54/0x11a0 [ 31.354572] __split_vma+0x5af/0x950 [ 31.355061] ? __pfx___split_vma+0x10/0x10 [ 31.355599] ? find_held_lock+0x2c/0x110 [ 31.356143] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.356725] ? lock_is_held_type+0x9f/0x120 [ 31.357296] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.357913] ? mtree_range_walk+0x632/0x900 [ 31.358484] ? mas_walk+0x5c7/0x7c0 [ 31.358973] do_vmi_munmap+0x1f1/0x2b0 [ 31.359477] mmap_region+0x1f9/0x2660 [ 31.359973] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.360502] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.361249] ? __pfx_lock_acquire+0x10/0x10 [ 31.361810] ? __pfx_mmap_region+0x10/0x10 [ 31.362355] ? security_mmap_addr+0x7d/0xa0 [ 31.362913] ? get_unmapped_area+0x1f5/0x3f0 [ 31.363480] do_mmap+0x854/0xf00 [ 31.363925] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.364431] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.365016] ksys_mmap_pgoff+0x3af/0x500 [ 31.365540] do_syscall_64+0x3f/0x90 [ 31.366030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.366696] RIP: 0033:0x7f1e572ddd82 [ 31.367172] 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 [ 31.369389] RSP: 002b:00007ffe45e83cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.370327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e572ddd82 [ 31.371192] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e56717000 [ 31.372056] RBP: 00007f1e56717000 R08: 0000000000000009 R09: 0000000000001000 [ 31.372936] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c76b510f60 [ 31.373827] R13: 00007ffe45e83d10 R14: 00007ffe45e83d40 R15: 00007ffe45e840a0 [ 31.374710] [ 31.375008] [ 31.375226] Allocated by task 213: [ 31.375669] kasan_save_stack+0x22/0x50 [ 31.376182] kasan_set_track+0x25/0x30 [ 31.376698] __kasan_slab_alloc+0x59/0x70 [ 31.377254] kmem_cache_alloc+0x16b/0x370 [ 31.377780] vm_area_dup+0x20/0x160 [ 31.378254] __split_vma+0x170/0x950 [ 31.378743] split_vma+0xc6/0x110 [ 31.379208] mprotect_fixup+0x8d2/0xb30 [ 31.379725] do_mprotect_pkey+0x87e/0xd40 [ 31.380271] __x64_sys_mprotect+0x78/0xc0 [ 31.380809] do_syscall_64+0x3f/0x90 [ 31.381313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.381983] [ 31.382203] Freed by task 203: [ 31.382612] kasan_save_stack+0x22/0x50 [ 31.383131] kasan_set_track+0x25/0x30 [ 31.383643] kasan_save_free_info+0x2b/0x50 [ 31.384196] __kasan_slab_free+0x10a/0x190 [ 31.384754] kmem_cache_free+0x10d/0x4d0 [ 31.385288] rcu_core+0x8c8/0x2860 [ 31.385743] __do_softirq+0x1b7/0x7d4 [ 31.386242] [ 31.386465] Last potentially related work creation: [ 31.387075] kasan_save_stack+0x22/0x50 [ 31.387658] __kasan_record_aux_stack+0x8e/0xa0 [ 31.388253] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.388928] remove_vma+0x139/0x170 [ 31.389421] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.390007] do_vmi_munmap+0x1f1/0x2b0 [ 31.390526] __vm_munmap+0x138/0x3a0 [ 31.391018] __x64_sys_munmap+0x59/0x80 [ 31.391534] do_syscall_64+0x3f/0x90 [ 31.392023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392697] [ 31.392921] The buggy address belongs to the object at ffff888018c23658 [ 31.392921] which belongs to the cache vm_area_struct of size 168 [ 31.394475] The buggy address is located 88 bytes inside of [ 31.394475] freed 168-byte region [ffff888018c23658, ffff888018c23700) [ 31.395937] [ 31.396159] The buggy address belongs to the physical page: [ 31.396844] page:0000000022636d6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c23 [ 31.397987] memcg:ffff8880146ccf01 [ 31.398418] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.399091] page_type: 0xffffffff() [ 31.399547] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.400488] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146ccf01 [ 31.401407] page dumped because: kasan: bad access detected [ 31.402079] [ 31.402294] Memory state around the buggy address: [ 31.402875] ffff888018c23580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.403723] ffff888018c23600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.404569] >ffff888018c23680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.405441] ^ [ 31.406025] ffff888018c23700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.406880] ffff888018c23780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.407749] ================================================================== [ 31.408692] Disabling lock debugging due to kernel taint [ 33.323397] BUG: Bad rss-counter state mm:000000000fa9b3a4 type:MM_FILEPAGES val:33 [ 33.324561] BUG: Bad rss-counter state mm:000000000fa9b3a4 type:MM_ANONPAGES val:22 [ 33.799070] BUG: Bad rss-counter state mm:0000000047a44da7 type:MM_FILEPAGES val:33 [ 33.800133] BUG: Bad rss-counter state mm:0000000047a44da7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7828' (ECDSA) to the list of known hosts. 2023/06/20 04:07:24 fuzzer started 2023/06/20 04:07:24 dialing manager at localhost:44161 2023/06/20 04:07:24 checking machine... 2023/06/20 04:07:24 checking revisions... [ 34.517660] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:07:25 testing simple program... [ 34.566634] cgroup: Unknown subsys name 'net' [ 34.606824] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:07:24 Registers: info registers vcpu 0 RAX=0000000000010b7e RBX=0000000000000001 RCX=ffffffff813ad6cf RDX=0000000000010b8b RSI=0000000000003ad6 RDI=ffffffff860d690e RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =ffffffff860d68c0 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000010b7e R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7f9b9 R15=ffff888008d7f978 RIP=ffffffff81130868 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 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=00007fa61987d618 CR3=000000000d768000 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=37303a3430203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323237 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000010 RDI=ffff88806cf09c00 RBP=dffffc0000000000 RSP=ffff88806cf09b50 R8 =ffffffff860723cc R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=ffff88806cf09bd0 R15=ffff88800f0b0540 RIP=ffffffff813ad5eb RFL=00000286 [--S--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 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=00007f298f16fcd0 CR3=000000000d768000 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=2034323a37303a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a37303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000