syzkaller login: [ 31.163684] BUG: Bad rss-counter state mm:00000000d32439eb type:MM_FILEPAGES val:33 [ 31.164896] BUG: Bad rss-counter state mm:00000000d32439eb type:MM_ANONPAGES val:22 [ 31.203689] ================================================================== [ 31.204492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.205216] Read of size 8 at addr ffff88800e37a880 by task sshd/219 [ 31.205874] [ 31.206055] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.206712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.207462] Call Trace: [ 31.207708] [ 31.207973] dump_stack_lvl+0x91/0xf0 [ 31.208349] print_report+0xcc/0x620 [ 31.208738] ? __virt_addr_valid+0x102/0x340 [ 31.209166] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.209636] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210123] kasan_report+0xbe/0xf0 [ 31.210481] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210968] vma_interval_tree_remove+0xc75/0xec0 [ 31.211426] vma_prepare+0xc54/0x11a0 [ 31.211789] __split_vma+0x5af/0x950 [ 31.212158] ? __pfx___split_vma+0x10/0x10 [ 31.212567] ? find_held_lock+0x2c/0x110 [ 31.212980] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.213413] ? lock_is_held_type+0x9f/0x120 [ 31.213826] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.214313] ? mtree_range_walk+0x632/0x900 [ 31.214733] ? mas_walk+0x5c7/0x7c0 [ 31.215110] do_vmi_munmap+0x1f1/0x2b0 [ 31.215488] mmap_region+0x1f9/0x2660 [ 31.215864] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.216260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.216825] ? __pfx_lock_acquire+0x10/0x10 [ 31.217249] ? __pfx_mmap_region+0x10/0x10 [ 31.217651] ? security_mmap_addr+0x7d/0xa0 [ 31.218082] ? get_unmapped_area+0x1f5/0x3f0 [ 31.218498] do_mmap+0x854/0xf00 [ 31.218831] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.219228] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.219655] ksys_mmap_pgoff+0x3af/0x500 [ 31.220052] do_syscall_64+0x3f/0x90 [ 31.220432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.220939] RIP: 0033:0x7fbbfbc9ed82 [ 31.221288] 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 [ 31.222932] RSP: 002b:00007ffd81030778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.223634] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbbfbc9ed82 [ 31.224288] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbbfb0d8000 [ 31.224953] RBP: 00007fbbfb0d8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.225598] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bdd2b8eec0 [ 31.226264] R13: 00007ffd81030790 R14: 00007ffd810307c0 R15: 00007ffd81030b20 [ 31.226938] [ 31.227164] [ 31.227326] Allocated by task 212: [ 31.227652] kasan_save_stack+0x22/0x50 [ 31.228051] kasan_set_track+0x25/0x30 [ 31.228436] __kasan_slab_alloc+0x59/0x70 [ 31.228835] kmem_cache_alloc+0x16b/0x370 [ 31.229232] vm_area_dup+0x20/0x160 [ 31.229577] __split_vma+0x170/0x950 [ 31.229947] split_vma+0xc6/0x110 [ 31.230295] mprotect_fixup+0x8d2/0xb30 [ 31.230681] do_mprotect_pkey+0x87e/0xd40 [ 31.231085] __x64_sys_mprotect+0x78/0xc0 [ 31.231481] do_syscall_64+0x3f/0x90 [ 31.231838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232343] [ 31.232526] Freed by task 212: [ 31.232824] kasan_save_stack+0x22/0x50 [ 31.233225] kasan_set_track+0x25/0x30 [ 31.233597] kasan_save_free_info+0x2b/0x50 [ 31.234023] __kasan_slab_free+0x10a/0x190 [ 31.234434] kmem_cache_free+0x10d/0x4d0 [ 31.234820] rcu_core+0x8c8/0x2860 [ 31.235166] __do_softirq+0x1b7/0x7d4 [ 31.235527] [ 31.235689] Last potentially related work creation: [ 31.236200] kasan_save_stack+0x22/0x50 [ 31.236711] __kasan_record_aux_stack+0x8e/0xa0 [ 31.237285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.237935] remove_vma+0x139/0x170 [ 31.238392] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.238951] do_vmi_munmap+0x1f1/0x2b0 [ 31.239435] __vm_munmap+0x138/0x3a0 [ 31.239900] __x64_sys_munmap+0x59/0x80 [ 31.240389] do_syscall_64+0x3f/0x90 [ 31.240886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241531] [ 31.241744] Second to last potentially related work creation: [ 31.242448] kasan_save_stack+0x22/0x50 [ 31.242955] __kasan_record_aux_stack+0x8e/0xa0 [ 31.243523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.244169] remove_vma+0x139/0x170 [ 31.244623] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.245174] do_vmi_munmap+0x1f1/0x2b0 [ 31.245653] mmap_region+0x1f9/0x2660 [ 31.246128] do_mmap+0x854/0xf00 [ 31.246548] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.247031] ksys_mmap_pgoff+0x3af/0x500 [ 31.247527] do_syscall_64+0x3f/0x90 [ 31.248004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248661] [ 31.248883] The buggy address belongs to the object at ffff88800e37a828 [ 31.248883] which belongs to the cache vm_area_struct of size 168 [ 31.250367] The buggy address is located 88 bytes inside of [ 31.250367] freed 168-byte region [ffff88800e37a828, ffff88800e37a8d0) [ 31.251780] [ 31.251994] The buggy address belongs to the physical page: [ 31.252666] page:0000000029afb48c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe37a [ 31.253751] memcg:ffff88800dfa8c01 [ 31.254183] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.254899] page_type: 0xffffffff() [ 31.255351] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.256271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfa8c01 [ 31.257191] page dumped because: kasan: bad access detected [ 31.257843] [ 31.258057] Memory state around the buggy address: [ 31.258635] ffff88800e37a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.259478] ffff88800e37a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.260351] >ffff88800e37a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.261607] ^ [ 31.262177] ffff88800e37a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.263348] ffff88800e37a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.264544] ================================================================== [ 31.265973] Disabling lock debugging due to kernel taint [ 33.394823] BUG: Bad rss-counter state mm:000000002c3db763 type:MM_FILEPAGES val:33 [ 33.396022] BUG: Bad rss-counter state mm:000000002c3db763 type:MM_ANONPAGES val:22 [ 33.814315] BUG: Bad rss-counter state mm:0000000021e4678a type:MM_FILEPAGES val:33 [ 33.815375] BUG: Bad rss-counter state mm:0000000021e4678a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12167' (ECDSA) to the list of known hosts. 2023/06/19 11:29:07 fuzzer started 2023/06/19 11:29:07 dialing manager at localhost:44161 2023/06/19 11:29:07 checking machine... 2023/06/19 11:29:07 checking revisions... [ 34.573530] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:29:07 testing simple program... [ 34.636737] cgroup: Unknown subsys name 'net' [ 34.683830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:29:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028a2f32 RSI=ffffffff8186cb26 RDI=ffff888014517a00 RBP=ffff8880145179d0 RSP=ffff888014517928 R8 =0000000000000001 R9 =ffff888014517978 R10=0000000000038001 R11=0000000000020c48 R12=ffff888014517a00 R13=0000000000000000 R14=ffff888016119b40 R15=0000000000000dc0 RIP=ffffffff813ad42f RFL=00000282 [--S----] 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 00007f31a1d90900 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=00007f31a2345650 CR3=000000001601c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffed10028cafac RCX=0000000000000000 RDX=ffff8880102eb680 RSI=ffffffff817185e4 RDI=0000000000000001 RBP=80000000180d9025 RSP=ffff888014657d40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=ffff88800d1c60b8 R13=0000000000000a55 R14=0000000000004000 R15=000000000ec68067 RIP=ffffffff817185ff 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 00007fb3069ba900 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=00007fb305e17640 CR3=000000001455a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=41cb10a96b80557d00000000000ae988 XMM05=62564e41a9898d820000000000136008 XMM06=dfcdbad4f1609c370000000000134ea0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000