syzkaller login: [ 30.162566] BUG: Bad rss-counter state mm:000000005eb0a023 type:MM_FILEPAGES val:33 [ 30.163548] BUG: Bad rss-counter state mm:000000005eb0a023 type:MM_ANONPAGES val:22 [ 30.327231] ================================================================== [ 30.328111] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.328994] Read of size 8 at addr ffff888018a0ded8 by task sshd/219 [ 30.329709] [ 30.329931] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.330873] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.331776] Call Trace: [ 30.332077] [ 30.332345] dump_stack_lvl+0x91/0xf0 [ 30.332826] print_report+0xcc/0x620 [ 30.333283] ? __virt_addr_valid+0x102/0x340 [ 30.333800] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.334411] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.334993] kasan_report+0xbe/0xf0 [ 30.335444] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.336044] vma_interval_tree_remove+0xc75/0xec0 [ 30.336612] vma_prepare+0xc54/0x11a0 [ 30.337084] __split_vma+0x5af/0x950 [ 30.337545] ? __pfx___split_vma+0x10/0x10 [ 30.338052] ? find_held_lock+0x2c/0x110 [ 30.338559] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.339108] ? lock_is_held_type+0x9f/0x120 [ 30.339630] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.340229] ? mtree_range_walk+0x632/0x900 [ 30.340758] ? mas_walk+0x5c7/0x7c0 [ 30.341218] do_vmi_munmap+0x1f1/0x2b0 [ 30.341698] mmap_region+0x1f9/0x2660 [ 30.342173] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.342658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.343353] ? __pfx_lock_acquire+0x10/0x10 [ 30.343873] ? __pfx_mmap_region+0x10/0x10 [ 30.344385] ? security_mmap_addr+0x7d/0xa0 [ 30.344888] ? get_unmapped_area+0x1f5/0x3f0 [ 30.345404] do_mmap+0x854/0xf00 [ 30.345821] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.346313] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.346852] ksys_mmap_pgoff+0x3af/0x500 [ 30.347331] do_syscall_64+0x3f/0x90 [ 30.347785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.348400] RIP: 0033:0x7f9f0fc71d82 [ 30.348832] 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 [ 30.350834] RSP: 002b:00007ffc66c8fac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.351690] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f0fc71d82 [ 30.352493] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f0f0ab000 [ 30.353298] RBP: 00007f9f0f0ab000 R08: 0000000000000009 R09: 0000000000001000 [ 30.354108] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632c73d1d90 [ 30.354919] R13: 00007ffc66c8fae0 R14: 00007ffc66c8fb10 R15: 00007ffc66c8fe70 [ 30.355773] [ 30.356068] [ 30.356278] Allocated by task 212: [ 30.356703] kasan_save_stack+0x22/0x50 [ 30.357214] kasan_set_track+0x25/0x30 [ 30.357702] __kasan_slab_alloc+0x59/0x70 [ 30.358247] kmem_cache_alloc+0x16b/0x370 [ 30.358760] vm_area_dup+0x20/0x160 [ 30.359211] __split_vma+0x170/0x950 [ 30.359672] split_vma+0xc6/0x110 [ 30.360105] mprotect_fixup+0x8d2/0xb30 [ 30.360604] do_mprotect_pkey+0x87e/0xd40 [ 30.361118] __x64_sys_mprotect+0x78/0xc0 [ 30.361641] do_syscall_64+0x3f/0x90 [ 30.362129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.362747] [ 30.362957] Freed by task 212: [ 30.363328] kasan_save_stack+0x22/0x50 [ 30.363804] kasan_set_track+0x25/0x30 [ 30.364277] kasan_save_free_info+0x2b/0x50 [ 30.364780] __kasan_slab_free+0x10a/0x190 [ 30.365281] kmem_cache_free+0x10d/0x4d0 [ 30.365763] rcu_core+0x8c8/0x2860 [ 30.366194] __do_softirq+0x1b7/0x7d4 [ 30.366644] [ 30.366856] Last potentially related work creation: [ 30.367406] kasan_save_stack+0x22/0x50 [ 30.367881] __kasan_record_aux_stack+0x8e/0xa0 [ 30.368420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.369025] remove_vma+0x139/0x170 [ 30.369449] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.370000] do_vmi_munmap+0x1f1/0x2b0 [ 30.370464] __vm_munmap+0x138/0x3a0 [ 30.370911] __x64_sys_munmap+0x59/0x80 [ 30.371411] do_syscall_64+0x3f/0x90 [ 30.371883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.372524] [ 30.372736] The buggy address belongs to the object at ffff888018a0de80 [ 30.372736] which belongs to the cache vm_area_struct of size 168 [ 30.374196] The buggy address is located 88 bytes inside of [ 30.374196] freed 168-byte region [ffff888018a0de80, ffff888018a0df28) [ 30.375598] [ 30.375812] The buggy address belongs to the physical page: [ 30.376474] page:00000000356f9342 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18a0d [ 30.377572] memcg:ffff88801979e701 [ 30.378013] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.378646] page_type: 0xffffffff() [ 30.379094] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.380024] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801979e701 [ 30.380934] page dumped because: kasan: bad access detected [ 30.381587] [ 30.381799] Memory state around the buggy address: [ 30.382396] ffff888018a0dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.383266] ffff888018a0de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.384130] >ffff888018a0de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.384983] ^ [ 30.385701] ffff888018a0df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.386571] ffff888018a0df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.387418] ================================================================== [ 30.388390] Disabling lock debugging due to kernel taint [ 32.304873] BUG: Bad rss-counter state mm:00000000d613d8e6 type:MM_FILEPAGES val:33 [ 32.306100] BUG: Bad rss-counter state mm:00000000d613d8e6 type:MM_ANONPAGES val:22 [ 32.798712] BUG: Bad rss-counter state mm:00000000f79af1a0 type:MM_FILEPAGES val:33 [ 32.800146] BUG: Bad rss-counter state mm:00000000f79af1a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46977' (ECDSA) to the list of known hosts. 2023/06/21 04:50:00 fuzzer started 2023/06/21 04:50:00 dialing manager at localhost:36067 2023/06/21 04:50:00 checking machine... 2023/06/21 04:50:00 checking revisions... [ 33.590980] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:50:00 testing simple program... [ 33.640602] cgroup: Unknown subsys name 'net' [ 33.699816] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:50:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110028ddf19 RCX=0000000000000000 RDX=ffff888016a73680 RSI=ffffffff81c6413c RDI=0000000000000001 RBP=ffff8880193f7e70 RSP=ffff8880146ef878 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff88801621f200 R14=0000000000000001 R15=ffff8880100fa000 RIP=ffffffff8135b934 RFL=00000293 [--S-A-C] 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 00007f836fe16900 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=00007f836f2a1f90 CR3=0000000008c72000 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=fda2210ea9cddd7600000000000ae988 XMM05=8a952cb0679141640000000000133d10 XMM06=806171799158d9670000000000132b00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81745be9 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11003169dfe RSI=ffffffff81745be9 RDI=ffff888018b4f060 RBP=ffff888018b4f030 RSP=ffff888018b4ef90 R8 =0000000000000001 R9 =ffff888018b4efd8 R10=0000000000038001 R11=000000000001e471 R12=ffff888018b4f060 R13=0000000000000000 R14=ffff888017411b40 R15=0000000000092800 RIP=ffffffff813ad470 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 00007f262ba75900 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=00007f262ba54020 CR3=000000000e8b0000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000