syzkaller login: [ 32.469042] BUG: Bad rss-counter state mm:00000000c8acb1bc type:MM_FILEPAGES val:33 [ 32.470045] BUG: Bad rss-counter state mm:00000000c8acb1bc type:MM_ANONPAGES val:22 [ 32.639148] ================================================================== [ 32.640281] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.641561] Read of size 8 at addr ffff88800f1b2880 by task sshd/221 [ 32.642444] [ 32.642670] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.643605] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.644599] Call Trace: [ 32.644934] [ 32.645230] dump_stack_lvl+0x91/0xf0 [ 32.645757] print_report+0xcc/0x620 [ 32.646247] ? __virt_addr_valid+0x102/0x340 [ 32.646835] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.647509] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.648152] kasan_report+0xbe/0xf0 [ 32.648652] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.649271] vma_interval_tree_remove+0xc75/0xec0 [ 32.649888] vma_prepare+0xc54/0x11a0 [ 32.650374] __split_vma+0x5af/0x950 [ 32.650874] ? __pfx___split_vma+0x10/0x10 [ 32.651453] ? find_held_lock+0x2c/0x110 [ 32.651982] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.652562] ? lock_is_held_type+0x9f/0x120 [ 32.653113] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.653750] ? mtree_range_walk+0x632/0x900 [ 32.654326] ? mas_walk+0x5c7/0x7c0 [ 32.654818] do_vmi_munmap+0x1f1/0x2b0 [ 32.655336] mmap_region+0x1f9/0x2660 [ 32.655854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.656382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.657116] ? __pfx_lock_acquire+0x10/0x10 [ 32.657683] ? __pfx_mmap_region+0x10/0x10 [ 32.658227] ? security_mmap_addr+0x7d/0xa0 [ 32.658793] ? get_unmapped_area+0x1f5/0x3f0 [ 32.659370] do_mmap+0x854/0xf00 [ 32.659839] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.660341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.660951] ksys_mmap_pgoff+0x3af/0x500 [ 32.661483] do_syscall_64+0x3f/0x90 [ 32.661966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.662638] RIP: 0033:0x7fa1de193d82 [ 32.663099] 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 [ 32.665340] RSP: 002b:00007ffcbda2d6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.666302] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1de193d82 [ 32.667174] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1dd5cd000 [ 32.668066] RBP: 00007fa1dd5cd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.668933] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8f3a36ec0 [ 32.669816] R13: 00007ffcbda2d700 R14: 00007ffcbda2d730 R15: 00007ffcbda2da90 [ 32.670703] [ 32.671001] [ 32.671223] Allocated by task 214: [ 32.671721] kasan_save_stack+0x22/0x50 [ 32.672411] kasan_set_track+0x25/0x30 [ 32.673108] __kasan_slab_alloc+0x59/0x70 [ 32.673809] kmem_cache_alloc+0x16b/0x370 [ 32.674513] vm_area_dup+0x20/0x160 [ 32.675128] __split_vma+0x170/0x950 [ 32.675757] split_vma+0xc6/0x110 [ 32.676337] mprotect_fixup+0x8d2/0xb30 [ 32.677016] do_mprotect_pkey+0x87e/0xd40 [ 32.677671] __x64_sys_mprotect+0x78/0xc0 [ 32.678205] do_syscall_64+0x3f/0x90 [ 32.678700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.679353] [ 32.679581] Freed by task 214: [ 32.679978] kasan_save_stack+0x22/0x50 [ 32.680521] kasan_set_track+0x25/0x30 [ 32.681018] kasan_save_free_info+0x2b/0x50 [ 32.681581] __kasan_slab_free+0x10a/0x190 [ 32.682116] kmem_cache_free+0x10d/0x4d0 [ 32.682648] rcu_core+0x8c8/0x2860 [ 32.683095] __do_softirq+0x1b7/0x7d4 [ 32.683623] [ 32.683843] Last potentially related work creation: [ 32.684447] kasan_save_stack+0x22/0x50 [ 32.684960] __kasan_record_aux_stack+0x8e/0xa0 [ 32.685567] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.686215] remove_vma+0x139/0x170 [ 32.686698] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.687271] do_vmi_munmap+0x1f1/0x2b0 [ 32.687784] __vm_munmap+0x138/0x3a0 [ 32.688253] __x64_sys_munmap+0x59/0x80 [ 32.688770] do_syscall_64+0x3f/0x90 [ 32.689249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.689927] [ 32.690148] The buggy address belongs to the object at ffff88800f1b2828 [ 32.690148] which belongs to the cache vm_area_struct of size 168 [ 32.691676] The buggy address is located 88 bytes inside of [ 32.691676] freed 168-byte region [ffff88800f1b2828, ffff88800f1b28d0) [ 32.693110] [ 32.693331] The buggy address belongs to the physical page: [ 32.694029] page:00000000f5009c2c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1b2 [ 32.695152] memcg:ffff888016c02701 [ 32.695611] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.696257] page_type: 0xffffffff() [ 32.696729] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.697663] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c02701 [ 32.698610] page dumped because: kasan: bad access detected [ 32.699315] [ 32.699548] Memory state around the buggy address: [ 32.700139] ffff88800f1b2780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.701020] ffff88800f1b2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.701901] >ffff88800f1b2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.702800] ^ [ 32.703213] ffff88800f1b2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.704112] ffff88800f1b2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.704994] ================================================================== [ 32.705981] Disabling lock debugging due to kernel taint [ 35.004259] BUG: Bad rss-counter state mm:0000000080cdf946 type:MM_FILEPAGES val:33 [ 35.005473] BUG: Bad rss-counter state mm:0000000080cdf946 type:MM_ANONPAGES val:22 [ 35.415598] BUG: Bad rss-counter state mm:000000003e17f326 type:MM_FILEPAGES val:33 [ 35.416586] BUG: Bad rss-counter state mm:000000003e17f326 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36954' (ECDSA) to the list of known hosts. 2023/06/20 01:04:50 fuzzer started 2023/06/20 01:04:51 dialing manager at localhost:44161 2023/06/20 01:04:51 checking machine... 2023/06/20 01:04:51 checking revisions... [ 36.030265] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:04:51 testing simple program... [ 36.074324] cgroup: Unknown subsys name 'net' [ 36.121320] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:04:49 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800da77200 RSP=ffff88800da77138 R8 =ffffffff864b024a R9 =ffff88800da771e8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800da77208 R13=ffff88800da771f0 R14=ffff88800da77f58 R15=ffff88800da771a8 RIP=ffffffff81130bc1 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 00007f3842ad4900 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=00007f3841f344d0 CR3=000000000d5c8000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=fc896570e588eec200000000000ae988 XMM05=5995a5685e1d5a8200000000001369a0 XMM06=c291bd5c70af25b90000000000135790 XMM07=fb795ef6d657705600000000001264c0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863dcb3b RBX=0000000000000001 RCX=ffffffff863dcb36 RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff85fc0370 RBP=ffff88800f1878a8 RSP=ffff88800f1877e0 R8 =ffffffff863dcb36 R9 =ffff88800f187890 R10=0000000000038001 R11=0000000000091be7 R12=ffff88800f1878b0 R13=ffff88800f187898 R14=ffff88800f187891 R15=ffff88800f187850 RIP=ffffffff81130a7e RFL=00000202 [-------] 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 00007f2e39efd900 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=00007ffdd40ca000 CR3=000000000e1e2000 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=6720646572637465733a4d41503d706f 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