syzkaller login: [ 29.978463] BUG: Bad rss-counter state mm:00000000b1f167ba type:MM_FILEPAGES val:33 [ 29.980175] BUG: Bad rss-counter state mm:00000000b1f167ba type:MM_ANONPAGES val:22 [ 30.146287] ================================================================== [ 30.147279] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.148215] Read of size 8 at addr ffff88800f606d08 by task sshd/219 [ 30.148977] [ 30.149198] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.150129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.151130] Call Trace: [ 30.151489] [ 30.151789] dump_stack_lvl+0x91/0xf0 [ 30.152278] print_report+0xcc/0x620 [ 30.152779] ? __virt_addr_valid+0x102/0x340 [ 30.153351] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.154010] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.154648] kasan_report+0xbe/0xf0 [ 30.155126] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.155782] vma_interval_tree_remove+0xc75/0xec0 [ 30.156413] vma_prepare+0xc54/0x11a0 [ 30.156896] __split_vma+0x5af/0x950 [ 30.157373] ? __pfx___split_vma+0x10/0x10 [ 30.157903] ? find_held_lock+0x2c/0x110 [ 30.158438] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.159031] ? lock_is_held_type+0x9f/0x120 [ 30.159603] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.160245] ? mtree_range_walk+0x632/0x900 [ 30.160827] ? mas_walk+0x5c7/0x7c0 [ 30.161331] do_vmi_munmap+0x1f1/0x2b0 [ 30.161857] mmap_region+0x1f9/0x2660 [ 30.162342] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.162860] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.163581] ? __pfx_lock_acquire+0x10/0x10 [ 30.164110] ? __pfx_mmap_region+0x10/0x10 [ 30.164652] ? security_mmap_addr+0x7d/0xa0 [ 30.165213] ? get_unmapped_area+0x1f5/0x3f0 [ 30.165803] do_mmap+0x854/0xf00 [ 30.166257] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.166779] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.167367] ksys_mmap_pgoff+0x3af/0x500 [ 30.167925] do_syscall_64+0x3f/0x90 [ 30.168430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.169134] RIP: 0033:0x7f134af7dd82 [ 30.169632] 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 [ 30.171848] RSP: 002b:00007fff39b1d7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.172807] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f134af7dd82 [ 30.173701] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f134a3b7000 [ 30.174579] RBP: 00007f134a3b7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.175472] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6c07e8f70 [ 30.176354] R13: 00007fff39b1d7f0 R14: 00007fff39b1d820 R15: 00007fff39b1db80 [ 30.177278] [ 30.177594] [ 30.177812] Allocated by task 211: [ 30.178239] kasan_save_stack+0x22/0x50 [ 30.178739] kasan_set_track+0x25/0x30 [ 30.179232] __kasan_slab_alloc+0x59/0x70 [ 30.179758] kmem_cache_alloc+0x16b/0x370 [ 30.180271] vm_area_dup+0x20/0x160 [ 30.180726] __split_vma+0x170/0x950 [ 30.181190] split_vma+0xc6/0x110 [ 30.181648] mprotect_fixup+0x8d2/0xb30 [ 30.182143] do_mprotect_pkey+0x87e/0xd40 [ 30.182660] __x64_sys_mprotect+0x78/0xc0 [ 30.183179] do_syscall_64+0x3f/0x90 [ 30.183651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.184295] [ 30.184510] Freed by task 211: [ 30.184906] kasan_save_stack+0x22/0x50 [ 30.185407] kasan_set_track+0x25/0x30 [ 30.185909] kasan_save_free_info+0x2b/0x50 [ 30.186439] __kasan_slab_free+0x10a/0x190 [ 30.186972] kmem_cache_free+0x10d/0x4d0 [ 30.187488] rcu_core+0x8c8/0x2860 [ 30.187933] __do_softirq+0x1b7/0x7d4 [ 30.188421] [ 30.188637] Last potentially related work creation: [ 30.189220] kasan_save_stack+0x22/0x50 [ 30.189761] __kasan_record_aux_stack+0x8e/0xa0 [ 30.190348] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.191034] remove_vma+0x139/0x170 [ 30.191524] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.192090] do_vmi_munmap+0x1f1/0x2b0 [ 30.192574] __vm_munmap+0x138/0x3a0 [ 30.193046] __x64_sys_munmap+0x59/0x80 [ 30.193546] do_syscall_64+0x3f/0x90 [ 30.194074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.194723] [ 30.194942] The buggy address belongs to the object at ffff88800f606cb0 [ 30.194942] which belongs to the cache vm_area_struct of size 168 [ 30.196453] The buggy address is located 88 bytes inside of [ 30.196453] freed 168-byte region [ffff88800f606cb0, ffff88800f606d58) [ 30.197946] [ 30.198177] The buggy address belongs to the physical page: [ 30.198850] page:0000000077f41ec7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf606 [ 30.199996] memcg:ffff88800f8e1601 [ 30.200420] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.201065] page_type: 0xffffffff() [ 30.201511] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.202450] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f8e1601 [ 30.203355] page dumped because: kasan: bad access detected [ 30.204013] [ 30.204232] Memory state around the buggy address: [ 30.204807] ffff88800f606c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.205678] ffff88800f606c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.206532] >ffff88800f606d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.207380] ^ [ 30.207824] ffff88800f606d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.208680] ffff88800f606e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.209538] ================================================================== [ 30.210611] Disabling lock debugging due to kernel taint [ 32.345725] BUG: Bad rss-counter state mm:00000000dbabbf77 type:MM_FILEPAGES val:33 [ 32.346982] BUG: Bad rss-counter state mm:00000000dbabbf77 type:MM_ANONPAGES val:22 [ 32.707698] BUG: Bad rss-counter state mm:00000000b3c37b6a type:MM_FILEPAGES val:33 [ 32.708676] BUG: Bad rss-counter state mm:00000000b3c37b6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29243' (ECDSA) to the list of known hosts. 2023/06/19 15:54:12 fuzzer started 2023/06/19 15:54:12 dialing manager at localhost:44161 2023/06/19 15:54:12 checking machine... 2023/06/19 15:54:12 checking revisions... [ 33.348605] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:54:12 testing simple program... [ 33.393156] cgroup: Unknown subsys name 'net' [ 33.433906] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:54:11 Registers: info registers vcpu 0 RAX=00007ffd6e4c8580 RBX=00000000000000e1 RCX=00007ffd6e4c9580 RDX=00007ffd6e4ca880 RSI=0000000000000000 RDI=00007ffd6e4c8580 RBP=00000000000000f4 RSP=00007ffd6e4c8548 R8 =00007ffd6e4ccc24 R9 =00007ffd6e4ccae0 R10=00007f097277ca57 R11=0000000000000000 R12=0000000000000008 R13=00007ffd6e4c8580 R14=00007ffd6e4ccd50 R15=0000000000000452 RIP=00007f0972182fe5 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0971c2c900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd6e4c9000 CR3=00000000181f6000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=1e8ae03beec8c39108f7f8b07d4b6aae XMM04=064e62fb00da7c952d38596578db3ea3 XMM05=00000000ff0000000000000000000000 XMM06=064e623b00c87c9108385965784b3ea3 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=00007f5f76c7e490 CR3=000000000d6a0000 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=e7dd1c047add81bb7c499e784b04a400 XMM02=ec2efd57dc4c00df0000000000120140 XMM03=f546de40120e061a0000000000120210 XMM04=878f0b153be19b6a00000000000ae988 XMM05=dfcdbad4f1609c3700000000001344e0 XMM06=806171799158d9670000000000134368 XMM07=e042d86d42eb936e0000000000124b68 XMM08=f546de40120e061a0000000000120210 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000