syzkaller login: [ 38.648511] BUG: Bad rss-counter state mm:0000000063fdd293 type:MM_FILEPAGES val:33 [ 38.649483] BUG: Bad rss-counter state mm:0000000063fdd293 type:MM_ANONPAGES val:22 [ 38.808604] ================================================================== [ 38.809559] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.810519] Read of size 8 at addr ffff88800f5e3b38 by task sshd/220 [ 38.811425] [ 38.811647] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.812539] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.813534] Call Trace: [ 38.813864] [ 38.814156] dump_stack_lvl+0x91/0xf0 [ 38.814661] print_report+0xcc/0x620 [ 38.815157] ? __virt_addr_valid+0x102/0x340 [ 38.815736] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.816375] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.816997] kasan_report+0xbe/0xf0 [ 38.817476] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.818112] vma_interval_tree_remove+0xc75/0xec0 [ 38.818724] vma_prepare+0xc54/0x11a0 [ 38.819205] __split_vma+0x5af/0x950 [ 38.819706] ? __pfx___split_vma+0x10/0x10 [ 38.820235] ? find_held_lock+0x2c/0x110 [ 38.820764] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.821334] ? lock_is_held_type+0x9f/0x120 [ 38.821873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.822491] ? mtree_range_walk+0x632/0x900 [ 38.823051] ? mas_walk+0x5c7/0x7c0 [ 38.823543] do_vmi_munmap+0x1f1/0x2b0 [ 38.824041] mmap_region+0x1f9/0x2660 [ 38.824523] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.825038] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.825751] ? __pfx_lock_acquire+0x10/0x10 [ 38.826293] ? __pfx_mmap_region+0x10/0x10 [ 38.826823] ? security_mmap_addr+0x7d/0xa0 [ 38.827365] ? get_unmapped_area+0x1f5/0x3f0 [ 38.827928] do_mmap+0x854/0xf00 [ 38.828369] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.828866] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.829433] ksys_mmap_pgoff+0x3af/0x500 [ 38.829946] do_syscall_64+0x3f/0x90 [ 38.830433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.831083] RIP: 0033:0x7f7b4d8a1d82 [ 38.831563] 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 [ 38.833705] RSP: 002b:00007ffedc4745f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.834627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b4d8a1d82 [ 38.835477] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b4ccdb000 [ 38.836327] RBP: 00007f7b4ccdb000 R08: 0000000000000009 R09: 0000000000001000 [ 38.837178] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645f7e64ec0 [ 38.838045] R13: 00007ffedc474610 R14: 00007ffedc474640 R15: 00007ffedc4749a0 [ 38.838914] [ 38.839208] [ 38.839446] Allocated by task 213: [ 38.839877] kasan_save_stack+0x22/0x50 [ 38.840388] kasan_set_track+0x25/0x30 [ 38.840898] __kasan_slab_alloc+0x59/0x70 [ 38.841425] kmem_cache_alloc+0x16b/0x370 [ 38.841950] vm_area_dup+0x20/0x160 [ 38.842417] __split_vma+0x170/0x950 [ 38.842891] split_vma+0xc6/0x110 [ 38.843349] mprotect_fixup+0x8d2/0xb30 [ 38.843863] do_mprotect_pkey+0x87e/0xd40 [ 38.844394] __x64_sys_mprotect+0x78/0xc0 [ 38.844921] do_syscall_64+0x3f/0x90 [ 38.845404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.846069] [ 38.846291] Freed by task 213: [ 38.846700] kasan_save_stack+0x22/0x50 [ 38.847222] kasan_set_track+0x25/0x30 [ 38.847734] kasan_save_free_info+0x2b/0x50 [ 38.848270] __kasan_slab_free+0x10a/0x190 [ 38.848802] kmem_cache_free+0x10d/0x4d0 [ 38.849315] rcu_core+0x8c8/0x2860 [ 38.849759] __do_softirq+0x1b7/0x7d4 [ 38.850241] [ 38.850459] Last potentially related work creation: [ 38.851043] kasan_save_stack+0x22/0x50 [ 38.851566] __kasan_record_aux_stack+0x8e/0xa0 [ 38.852140] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.852781] remove_vma+0x139/0x170 [ 38.853231] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.853789] do_vmi_munmap+0x1f1/0x2b0 [ 38.854279] __vm_munmap+0x138/0x3a0 [ 38.854745] __x64_sys_munmap+0x59/0x80 [ 38.855243] do_syscall_64+0x3f/0x90 [ 38.855732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.856373] [ 38.856596] The buggy address belongs to the object at ffff88800f5e3ae0 [ 38.856596] which belongs to the cache vm_area_struct of size 168 [ 38.858056] The buggy address is located 88 bytes inside of [ 38.858056] freed 168-byte region [ffff88800f5e3ae0, ffff88800f5e3b88) [ 38.859484] [ 38.859703] The buggy address belongs to the physical page: [ 38.860367] page:000000008f91bb6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5e3 [ 38.861449] memcg:ffff88800eca7e01 [ 38.861875] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.862517] page_type: 0xffffffff() [ 38.862968] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.863909] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eca7e01 [ 38.864848] page dumped because: kasan: bad access detected [ 38.865514] [ 38.865732] Memory state around the buggy address: [ 38.866315] ffff88800f5e3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.867189] ffff88800f5e3a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.868066] >ffff88800f5e3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.868919] ^ [ 38.869535] ffff88800f5e3b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.870392] ffff88800f5e3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.871268] ================================================================== [ 38.872252] Disabling lock debugging due to kernel taint [ 40.940664] BUG: Bad rss-counter state mm:00000000c29ed669 type:MM_FILEPAGES val:33 [ 40.941880] BUG: Bad rss-counter state mm:00000000c29ed669 type:MM_ANONPAGES val:22 [ 41.421883] BUG: Bad rss-counter state mm:00000000768ce993 type:MM_FILEPAGES val:33 [ 41.423042] BUG: Bad rss-counter state mm:00000000768ce993 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61951' (ECDSA) to the list of known hosts. 2023/06/20 18:31:05 fuzzer started 2023/06/20 18:31:05 dialing manager at localhost:36067 2023/06/20 18:31:05 checking machine... 2023/06/20 18:31:05 checking revisions... [ 42.094530] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:31:05 testing simple program... [ 42.138131] cgroup: Unknown subsys name 'net' [ 42.181056] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:31:05 Registers: info registers vcpu 0 RAX=ffffffff81c619e4 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100285ce98 RSI=ffffffff81c619e4 RDI=ffff8880142e7530 RBP=ffff8880142e7500 RSP=ffff8880142e7460 R8 =0000000000000001 R9 =ffff8880142e74a8 R10=0000000000038001 R11=0000000000020c51 R12=ffff8880142e7530 R13=0000000000000000 R14=ffff888015bbd1c0 R15=0000000000092c40 RIP=ffffffff813ad474 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fee7c3ea900 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=00007fee7b849540 CR3=000000000d82e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b2c6b44f6415ed7100000000000ae988 XMM05=20957b511814de920000000000133400 XMM06=19e9129bd510f2350000000000131f28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff888017e67af0 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000009a9c3 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88801439b680 R15=ffff88801a5fab30 RIP=ffffffff8113038e 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 00007f4f5e465700 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=00007f8d66109618 CR3=0000000019428000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035303a3133 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343534 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000