syzkaller login: [ 45.311853] BUG: Bad rss-counter state mm:0000000076763665 type:MM_FILEPAGES val:33 [ 45.313283] BUG: Bad rss-counter state mm:0000000076763665 type:MM_ANONPAGES val:22 [ 45.464004] ================================================================== [ 45.464980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.465934] Read of size 8 at addr ffff88800e77b228 by task sshd/220 [ 45.466927] [ 45.467160] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.468039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.469040] Call Trace: [ 45.469381] [ 45.469678] dump_stack_lvl+0x91/0xf0 [ 45.470173] print_report+0xcc/0x620 [ 45.470671] ? __virt_addr_valid+0x102/0x340 [ 45.471227] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.471874] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.472514] kasan_report+0xbe/0xf0 [ 45.473003] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.473640] vma_interval_tree_remove+0xc75/0xec0 [ 45.474240] vma_prepare+0xc54/0x11a0 [ 45.474724] __split_vma+0x5af/0x950 [ 45.475193] ? __pfx___split_vma+0x10/0x10 [ 45.475748] ? find_held_lock+0x2c/0x110 [ 45.476283] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.476852] ? lock_is_held_type+0x9f/0x120 [ 45.477396] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.478004] ? mtree_range_walk+0x632/0x900 [ 45.478551] ? mas_walk+0x5c7/0x7c0 [ 45.479029] do_vmi_munmap+0x1f1/0x2b0 [ 45.479540] mmap_region+0x1f9/0x2660 [ 45.480028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.480538] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.481279] ? __pfx_lock_acquire+0x10/0x10 [ 45.481828] ? __pfx_mmap_region+0x10/0x10 [ 45.482358] ? security_mmap_addr+0x7d/0xa0 [ 45.482900] ? get_unmapped_area+0x1f5/0x3f0 [ 45.483472] do_mmap+0x854/0xf00 [ 45.483920] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.484420] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.484998] ksys_mmap_pgoff+0x3af/0x500 [ 45.485519] do_syscall_64+0x3f/0x90 [ 45.486015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.486690] RIP: 0033:0x7fcadf6ced82 [ 45.487163] 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 [ 45.489331] RSP: 002b:00007ffc54e85078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.490228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcadf6ced82 [ 45.491074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcadeb08000 [ 45.491921] RBP: 00007fcadeb08000 R08: 0000000000000009 R09: 0000000000001000 [ 45.492765] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf67401ec0 [ 45.493602] R13: 00007ffc54e85090 R14: 00007ffc54e850c0 R15: 00007ffc54e85420 [ 45.494450] [ 45.494749] [ 45.494964] Allocated by task 213: [ 45.495406] kasan_save_stack+0x22/0x50 [ 45.495914] kasan_set_track+0x25/0x30 [ 45.496417] __kasan_slab_alloc+0x59/0x70 [ 45.496953] kmem_cache_alloc+0x16b/0x370 [ 45.497476] vm_area_dup+0x20/0x160 [ 45.497938] __split_vma+0x170/0x950 [ 45.498402] split_vma+0xc6/0x110 [ 45.498842] mprotect_fixup+0x8d2/0xb30 [ 45.499367] do_mprotect_pkey+0x87e/0xd40 [ 45.499896] __x64_sys_mprotect+0x78/0xc0 [ 45.500415] do_syscall_64+0x3f/0x90 [ 45.500893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.501536] [ 45.501755] Freed by task 213: [ 45.502149] kasan_save_stack+0x22/0x50 [ 45.502659] kasan_set_track+0x25/0x30 [ 45.503153] kasan_save_free_info+0x2b/0x50 [ 45.503696] __kasan_slab_free+0x10a/0x190 [ 45.504227] kmem_cache_free+0x10d/0x4d0 [ 45.504738] rcu_core+0x8c8/0x2860 [ 45.505181] __do_softirq+0x1b7/0x7d4 [ 45.505663] [ 45.505878] Last potentially related work creation: [ 45.506475] kasan_save_stack+0x22/0x50 [ 45.507082] __kasan_record_aux_stack+0x8e/0xa0 [ 45.507691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.508335] remove_vma+0x139/0x170 [ 45.508793] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.509351] do_vmi_munmap+0x1f1/0x2b0 [ 45.509843] __vm_munmap+0x138/0x3a0 [ 45.510312] __x64_sys_munmap+0x59/0x80 [ 45.510816] do_syscall_64+0x3f/0x90 [ 45.511309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.511952] [ 45.512171] The buggy address belongs to the object at ffff88800e77b1d0 [ 45.512171] which belongs to the cache vm_area_struct of size 168 [ 45.513676] The buggy address is located 88 bytes inside of [ 45.513676] freed 168-byte region [ffff88800e77b1d0, ffff88800e77b278) [ 45.515125] [ 45.515355] The buggy address belongs to the physical page: [ 45.516024] page:00000000587d7a74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe77b [ 45.517143] memcg:ffff88800e77c001 [ 45.517595] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.518275] page_type: 0xffffffff() [ 45.518756] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.519743] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e77c001 [ 45.520702] page dumped because: kasan: bad access detected [ 45.521412] [ 45.521646] Memory state around the buggy address: [ 45.522265] ffff88800e77b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.523186] ffff88800e77b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 45.524110] >ffff88800e77b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 45.525011] ^ [ 45.525605] ffff88800e77b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 45.526513] ffff88800e77b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 45.527449] ================================================================== [ 45.528569] Disabling lock debugging due to kernel taint [ 47.543237] BUG: Bad rss-counter state mm:000000000efc2868 type:MM_FILEPAGES val:33 [ 47.544730] BUG: Bad rss-counter state mm:000000000efc2868 type:MM_ANONPAGES val:22 [ 48.022697] BUG: Bad rss-counter state mm:0000000011aff5a8 type:MM_FILEPAGES val:33 [ 48.023742] BUG: Bad rss-counter state mm:0000000011aff5a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60065' (ECDSA) to the list of known hosts. 2023/06/19 17:14:01 fuzzer started 2023/06/19 17:14:01 dialing manager at localhost:44161 2023/06/19 17:14:01 checking machine... 2023/06/19 17:14:01 checking revisions... [ 48.798545] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:14:01 testing simple program... [ 48.848096] cgroup: Unknown subsys name 'net' [ 48.886431] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:13:46 Registers: info registers vcpu 0 RAX=ffffffff86137009 RBX=0000000000000001 RCX=ffffffff86137004 RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff85dfc6a4 RBP=ffff88801663f600 RSP=ffff88801663f538 R8 =ffffffff86137004 R9 =ffff88801663f5e8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88801663f608 R13=ffff88801663f5f0 R14=ffff88801663f5e9 R15=ffff88801663f5a8 RIP=ffffffff81130a72 RFL=00000246 [---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 00007f6469f81700 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=00007fef9178b618 CR3=0000000019a96000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732031303a3431 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383934 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fb0d388b640 CR3=000000000ca3e000 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=52b5a8914549529c57429b0aa31e176c XMM02=000000000011d4a0ec2efd57dc4c00df XMM03=0000000000124280cc4320ee8e727743 XMM04=fb908527cd89e92c00000000000ae988 XMM05=dd4a7c60a33156bb0000000000134838 XMM06=4fda316b135da52b0000000000133c60 XMM07=e042d86d42eb936e0000000000124500 XMM08=cc4320ee8e727743000000000011d500 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000