syzkaller login: [ 89.392167] BUG: Bad rss-counter state mm:00000000a6f577ad type:MM_FILEPAGES val:33 [ 89.393387] BUG: Bad rss-counter state mm:00000000a6f577ad type:MM_ANONPAGES val:22 [ 89.431640] ================================================================== [ 89.432762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 89.433792] Read of size 8 at addr ffff88800ea02a50 by task sshd/219 [ 89.434681] [ 89.434927] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 89.436057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 89.437134] Call Trace: [ 89.437492] [ 89.437804] dump_stack_lvl+0x91/0xf0 [ 89.438347] print_report+0xcc/0x620 [ 89.438896] ? __virt_addr_valid+0x102/0x340 [ 89.439504] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.440185] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.440870] kasan_report+0xbe/0xf0 [ 89.441385] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.442077] vma_interval_tree_remove+0xc75/0xec0 [ 89.442757] vma_prepare+0xc54/0x11a0 [ 89.443287] __split_vma+0x5af/0x950 [ 89.443802] ? __pfx___split_vma+0x10/0x10 [ 89.444388] ? find_held_lock+0x2c/0x110 [ 89.444966] do_vmi_align_munmap+0x2ba/0x11f0 [ 89.445599] ? lock_is_held_type+0x9f/0x120 [ 89.446194] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 89.446900] ? mtree_range_walk+0x632/0x900 [ 89.447515] ? mas_walk+0x5c7/0x7c0 [ 89.448043] do_vmi_munmap+0x1f1/0x2b0 [ 89.448586] mmap_region+0x1f9/0x2660 [ 89.449130] ? vm_mmap_pgoff+0x15c/0x3a0 [ 89.449683] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 89.450467] ? __pfx_lock_acquire+0x10/0x10 [ 89.451073] ? __pfx_mmap_region+0x10/0x10 [ 89.451661] ? security_mmap_addr+0x7d/0xa0 [ 89.452251] ? get_unmapped_area+0x1f5/0x3f0 [ 89.452854] do_mmap+0x854/0xf00 [ 89.453346] vm_mmap_pgoff+0x1a6/0x3a0 [ 89.453898] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 89.454531] ksys_mmap_pgoff+0x3af/0x500 [ 89.455111] do_syscall_64+0x3f/0x90 [ 89.455641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.456357] RIP: 0033:0x7f053e0f4d82 [ 89.456866] 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 [ 89.459238] RSP: 002b:00007ffe2a9e6878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 89.460232] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f053e0f4d82 [ 89.461167] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f053d52e000 [ 89.462098] RBP: 00007f053d52e000 R08: 0000000000000009 R09: 0000000000001000 [ 89.463068] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acf7687ec0 [ 89.464023] R13: 00007ffe2a9e6890 R14: 00007ffe2a9e68c0 R15: 00007ffe2a9e6c20 [ 89.464993] [ 89.465331] [ 89.465574] Allocated by task 212: [ 89.466054] kasan_save_stack+0x22/0x50 [ 89.466633] kasan_set_track+0x25/0x30 [ 89.467209] __kasan_slab_alloc+0x59/0x70 [ 89.467816] kmem_cache_alloc+0x16b/0x370 [ 89.468423] vm_area_dup+0x20/0x160 [ 89.468953] __split_vma+0x170/0x950 [ 89.469505] split_vma+0xc6/0x110 [ 89.470003] mprotect_fixup+0x8d2/0xb30 [ 89.470596] do_mprotect_pkey+0x87e/0xd40 [ 89.471246] __x64_sys_mprotect+0x78/0xc0 [ 89.471855] do_syscall_64+0x3f/0x90 [ 89.472415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.473164] [ 89.473421] Freed by task 212: [ 89.473878] kasan_save_stack+0x22/0x50 [ 89.474461] kasan_set_track+0x25/0x30 [ 89.475047] kasan_save_free_info+0x2b/0x50 [ 89.475685] __kasan_slab_free+0x10a/0x190 [ 89.476306] kmem_cache_free+0x10d/0x4d0 [ 89.476888] rcu_core+0x8c8/0x2860 [ 89.477381] __do_softirq+0x1b7/0x7d4 [ 89.477917] [ 89.478155] Last potentially related work creation: [ 89.478836] kasan_save_stack+0x22/0x50 [ 89.479405] __kasan_record_aux_stack+0x8e/0xa0 [ 89.480046] __call_rcu_common.constprop.0+0x6a/0xb90 [ 89.480769] remove_vma+0x139/0x170 [ 89.481274] do_vmi_align_munmap+0xd4a/0x11f0 [ 89.481919] do_vmi_munmap+0x1f1/0x2b0 [ 89.482491] __vm_munmap+0x138/0x3a0 [ 89.483055] __x64_sys_munmap+0x59/0x80 [ 89.483631] do_syscall_64+0x3f/0x90 [ 89.484187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.484934] [ 89.485174] Second to last potentially related work creation: [ 89.485969] kasan_save_stack+0x22/0x50 [ 89.486541] __kasan_record_aux_stack+0x8e/0xa0 [ 89.487203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 89.487918] remove_vma+0x139/0x170 [ 89.488420] do_vmi_align_munmap+0xd4a/0x11f0 [ 89.489055] do_vmi_munmap+0x1f1/0x2b0 [ 89.489608] mmap_region+0x1f9/0x2660 [ 89.490154] do_mmap+0x854/0xf00 [ 89.490648] vm_mmap_pgoff+0x1a6/0x3a0 [ 89.491233] ksys_mmap_pgoff+0x3af/0x500 [ 89.491815] do_syscall_64+0x3f/0x90 [ 89.492345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.493071] [ 89.493314] The buggy address belongs to the object at ffff88800ea029f8 [ 89.493314] which belongs to the cache vm_area_struct of size 168 [ 89.495024] The buggy address is located 88 bytes inside of [ 89.495024] freed 168-byte region [ffff88800ea029f8, ffff88800ea02aa0) [ 89.496643] [ 89.496890] The buggy address belongs to the physical page: [ 89.497671] page:00000000a0b72cc4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea02 [ 89.498947] memcg:ffff88800e0eb001 [ 89.499448] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 89.500261] page_type: 0xffffffff() [ 89.500796] raw: 0100000000000200 ffff88800879fc80 ffffea000035d6c0 dead000000000003 [ 89.501864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0eb001 [ 89.502927] page dumped because: kasan: bad access detected [ 89.503702] [ 89.503953] Memory state around the buggy address: [ 89.504640] ffff88800ea02900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 89.505646] ffff88800ea02980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 89.506657] >ffff88800ea02a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 89.507656] ^ [ 89.508465] ffff88800ea02a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 89.509482] ffff88800ea02b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 89.510477] ================================================================== [ 89.511778] Disabling lock debugging due to kernel taint [ 91.452397] BUG: Bad rss-counter state mm:00000000c8adff84 type:MM_FILEPAGES val:33 [ 91.453872] BUG: Bad rss-counter state mm:00000000c8adff84 type:MM_ANONPAGES val:22 [ 91.961063] BUG: Bad rss-counter state mm:00000000d86daf58 type:MM_FILEPAGES val:33 [ 91.962335] BUG: Bad rss-counter state mm:00000000d86daf58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12124' (ECDSA) to the list of known hosts. 2023/06/19 16:54:17 fuzzer started 2023/06/19 16:54:18 dialing manager at localhost:44161 2023/06/19 16:54:18 checking machine... 2023/06/19 16:54:18 checking revisions... [ 92.693045] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:54:18 testing simple program... [ 92.752683] cgroup: Unknown subsys name 'net' [ 92.806116] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:53:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f23144c00c0 CR3=000000000d6e6000 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=ba05b341d27426ad884df208e9699143 XMM02=0000000000122ec0eff9b2d0a8fce9cb XMM03=0000000000122f902c67c8bc2e329bc3 XMM04=f9a6ed1f7459abb000000000000ae988 XMM05=dfcdbad4f1609c37000000000013a418 XMM06=806171799158d967000000000013a2a0 XMM07=e042d86d42eb936e0000000000129418 XMM08=979dc535aff8b2750000000000122f90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001bc0a5f RBX=ffff88800de052c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800de052f8 RBP=ffff88800e06f8a0 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800e049b80 R14=ffffffff8186b9c5 R15=ffff88800cad3680 RIP=ffffffff81846362 RFL=00000046 [---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 00007fefbaa94900 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=00007ffd44718000 CR3=000000000cc7c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000