syzkaller login: [ 30.933783] BUG: Bad rss-counter state mm:00000000f70486a3 type:MM_FILEPAGES val:33 [ 30.936103] BUG: Bad rss-counter state mm:00000000f70486a3 type:MM_ANONPAGES val:22 [ 31.110535] ================================================================== [ 31.111520] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.112543] Read of size 8 at addr ffff88800e060968 by task sshd/221 [ 31.113487] [ 31.113764] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.114702] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.115742] Call Trace: [ 31.116115] <TASK> [ 31.116421] dump_stack_lvl+0x91/0xf0 [ 31.116963] print_report+0xcc/0x620 [ 31.117474] ? __virt_addr_valid+0x102/0x340 [ 31.118064] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.118730] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.119387] kasan_report+0xbe/0xf0 [ 31.119907] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.120577] vma_interval_tree_remove+0xc75/0xec0 [ 31.121237] vma_prepare+0xc54/0x11a0 [ 31.121760] __split_vma+0x5af/0x950 [ 31.122276] ? __pfx___split_vma+0x10/0x10 [ 31.122859] ? find_held_lock+0x2c/0x110 [ 31.123432] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.124067] ? lock_is_held_type+0x9f/0x120 [ 31.124654] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.125311] ? mtree_range_walk+0x632/0x900 [ 31.125915] ? mas_walk+0x5c7/0x7c0 [ 31.126428] do_vmi_munmap+0x1f1/0x2b0 [ 31.126965] mmap_region+0x1f9/0x2660 [ 31.127494] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.128052] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.128823] ? __pfx_lock_acquire+0x10/0x10 [ 31.129401] ? __pfx_mmap_region+0x10/0x10 [ 31.129975] ? security_mmap_addr+0x7d/0xa0 [ 31.130557] ? get_unmapped_area+0x1f5/0x3f0 [ 31.131157] do_mmap+0x854/0xf00 [ 31.131637] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.132184] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.132797] ksys_mmap_pgoff+0x3af/0x500 [ 31.133349] do_syscall_64+0x3f/0x90 [ 31.133873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.134582] RIP: 0033:0x7f70d7449d82 [ 31.135081] 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 [ 31.137447] RSP: 002b:00007ffd9e0d4f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.138407] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f70d7449d82 [ 31.139346] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f70d6883000 [ 31.140280] RBP: 00007f70d6883000 R08: 0000000000000009 R09: 0000000000001000 [ 31.141201] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1f70e3d90 [ 31.142112] R13: 00007ffd9e0d4f20 R14: 00007ffd9e0d4f50 R15: 00007ffd9e0d52b0 [ 31.143051] </TASK> [ 31.143372] [ 31.143603] Allocated by task 214: [ 31.144062] kasan_save_stack+0x22/0x50 [ 31.144600] kasan_set_track+0x25/0x30 [ 31.145135] __kasan_slab_alloc+0x59/0x70 [ 31.145697] kmem_cache_alloc+0x16b/0x370 [ 31.146258] vm_area_dup+0x20/0x160 [ 31.146758] __split_vma+0x170/0x950 [ 31.147263] split_vma+0xc6/0x110 [ 31.147738] mprotect_fixup+0x8d2/0xb30 [ 31.148292] do_mprotect_pkey+0x87e/0xd40 [ 31.148864] __x64_sys_mprotect+0x78/0xc0 [ 31.149424] do_syscall_64+0x3f/0x90 [ 31.149926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.150623] [ 31.150860] Freed by task 214: [ 31.151276] kasan_save_stack+0x22/0x50 [ 31.151830] kasan_set_track+0x25/0x30 [ 31.152359] kasan_save_free_info+0x2b/0x50 [ 31.152926] __kasan_slab_free+0x10a/0x190 [ 31.153492] kmem_cache_free+0x10d/0x4d0 [ 31.154036] rcu_core+0x8c8/0x2860 [ 31.154513] __do_softirq+0x1b7/0x7d4 [ 31.155127] [ 31.155366] Last potentially related work creation: [ 31.156038] kasan_save_stack+0x22/0x50 [ 31.156595] __kasan_record_aux_stack+0x8e/0xa0 [ 31.157227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.157915] remove_vma+0x139/0x170 [ 31.158395] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.159002] do_vmi_munmap+0x1f1/0x2b0 [ 31.159550] __vm_munmap+0x138/0x3a0 [ 31.160081] __x64_sys_munmap+0x59/0x80 [ 31.160607] do_syscall_64+0x3f/0x90 [ 31.161117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.161806] [ 31.162034] The buggy address belongs to the object at ffff88800e060910 [ 31.162034] which belongs to the cache vm_area_struct of size 168 [ 31.163631] The buggy address is located 88 bytes inside of [ 31.163631] freed 168-byte region [ffff88800e060910, ffff88800e0609b8) [ 31.165175] [ 31.165411] The buggy address belongs to the physical page: [ 31.166148] page:0000000047da9e5f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe060 [ 31.167338] memcg:ffff88800cabbe01 [ 31.167824] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.168539] page_type: 0xffffffff() [ 31.169033] raw: 0100000000000200 ffff8880087a0c80 ffffea0000392b00 dead000000000008 [ 31.170042] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cabbe01 [ 31.171046] page dumped because: kasan: bad access detected [ 31.171772] [ 31.172013] Memory state around the buggy address: [ 31.172652] ffff88800e060800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.173596] ffff88800e060880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.174538] >ffff88800e060900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.175478] ^ [ 31.176353] ffff88800e060980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.177298] ffff88800e060a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.178244] ================================================================== [ 31.179351] Disabling lock debugging due to kernel taint [ 33.658056] BUG: Bad rss-counter state mm:00000000bc2d18cf type:MM_FILEPAGES val:33 [ 33.659170] BUG: Bad rss-counter state mm:00000000bc2d18cf type:MM_ANONPAGES val:22 [ 34.130175] BUG: Bad rss-counter state mm:0000000081e5482e type:MM_FILEPAGES val:33 [ 34.131392] BUG: Bad rss-counter state mm:0000000081e5482e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57118' (ECDSA) to the list of known hosts. 2023/06/21 05:02:27 fuzzer started 2023/06/21 05:02:28 dialing manager at localhost:36067 2023/06/21 05:02:28 checking machine... 2023/06/21 05:02:28 checking revisions... [ 34.857620] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:02:28 testing simple program... [ 34.903230] cgroup: Unknown subsys name 'net' [ 34.954361] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:02:27 Registers: info registers vcpu 0 RAX=1ffff1100345c7b5 RBX=ffff88801a2e3d78 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801a2e3da8 RBP=ffff88800cae9180 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800cae8280 R14=ffffffff8186b835 R15=ffff88800ced7e00 RIP=ffffffff818464e2 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 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=00007f805cba58d0 CR3=000000000e390000 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=2037323a32303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a32303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180f5d4 RBX=ffffffff85dfe5f4 RCX=ffffffff8180f5ba RDX=0000000000000000 RSI=ffffffff8613971a RDI=ffffffff85dfe5d0 RBP=ffffffff85dfe5f0 RSP=ffff88801ce474f0 R8 =ffffffff8613971a R9 =ffff88801ce475e8 R10=0000000000038001 R11=0000000000020f03 R12=ffffffff85dfe5f0 R13=ffffffff85dfe5d0 R14=ffffffff85dfe5ec R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000283 [--S---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fed9517e900 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=00007ffeedbcf000 CR3=000000000c974000 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