syzkaller login: [ 50.472158] BUG: Bad rss-counter state mm:0000000056811446 type:MM_FILEPAGES val:33 [ 50.474057] BUG: Bad rss-counter state mm:0000000056811446 type:MM_ANONPAGES val:22 [ 50.638724] ================================================================== [ 50.639629] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.640567] Read of size 8 at addr ffff88801003b880 by task sshd/220 [ 50.641343] [ 50.641562] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.642551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.643535] Call Trace: [ 50.643855] [ 50.644154] dump_stack_lvl+0x91/0xf0 [ 50.644644] print_report+0xcc/0x620 [ 50.645141] ? __virt_addr_valid+0x102/0x340 [ 50.645710] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.646342] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.646958] kasan_report+0xbe/0xf0 [ 50.647434] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.648051] vma_interval_tree_remove+0xc75/0xec0 [ 50.648664] vma_prepare+0xc54/0x11a0 [ 50.649147] __split_vma+0x5af/0x950 [ 50.649618] ? __pfx___split_vma+0x10/0x10 [ 50.650158] ? find_held_lock+0x2c/0x110 [ 50.650678] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.651244] ? lock_is_held_type+0x9f/0x120 [ 50.651781] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.652383] ? mtree_range_walk+0x632/0x900 [ 50.652937] ? mas_walk+0x5c7/0x7c0 [ 50.653425] do_vmi_munmap+0x1f1/0x2b0 [ 50.653913] mmap_region+0x1f9/0x2660 [ 50.654392] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.654898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.655617] ? __pfx_lock_acquire+0x10/0x10 [ 50.656159] ? __pfx_mmap_region+0x10/0x10 [ 50.656690] ? security_mmap_addr+0x7d/0xa0 [ 50.657240] ? get_unmapped_area+0x1f5/0x3f0 [ 50.657793] do_mmap+0x854/0xf00 [ 50.658238] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.658732] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.659292] ksys_mmap_pgoff+0x3af/0x500 [ 50.659805] do_syscall_64+0x3f/0x90 [ 50.660284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.660932] RIP: 0033:0x7f797b62bd82 [ 50.661398] 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 [ 50.663533] RSP: 002b:00007fff63656858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.664441] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f797b62bd82 [ 50.665308] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f797aa65000 [ 50.666157] RBP: 00007f797aa65000 R08: 0000000000000009 R09: 0000000000001000 [ 50.667004] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b3d141ec0 [ 50.667847] R13: 00007fff63656870 R14: 00007fff636568a0 R15: 00007fff63656c00 [ 50.668696] [ 50.668987] [ 50.669210] Allocated by task 213: [ 50.669638] kasan_save_stack+0x22/0x50 [ 50.670152] kasan_set_track+0x25/0x30 [ 50.670639] __kasan_slab_alloc+0x59/0x70 [ 50.671164] kmem_cache_alloc+0x16b/0x370 [ 50.671681] vm_area_dup+0x20/0x160 [ 50.672140] __split_vma+0x170/0x950 [ 50.672609] split_vma+0xc6/0x110 [ 50.673048] mprotect_fixup+0x8d2/0xb30 [ 50.673566] do_mprotect_pkey+0x87e/0xd40 [ 50.674084] __x64_sys_mprotect+0x78/0xc0 [ 50.674597] do_syscall_64+0x3f/0x90 [ 50.675072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.675714] [ 50.675932] Freed by task 13: [ 50.676314] kasan_save_stack+0x22/0x50 [ 50.676831] kasan_set_track+0x25/0x30 [ 50.677333] kasan_save_free_info+0x2b/0x50 [ 50.677866] __kasan_slab_free+0x10a/0x190 [ 50.678408] kmem_cache_free+0x10d/0x4d0 [ 50.678911] rcu_core+0x8c8/0x2860 [ 50.679352] __do_softirq+0x1b7/0x7d4 [ 50.679824] [ 50.680038] Last potentially related work creation: [ 50.680632] kasan_save_stack+0x22/0x50 [ 50.681161] __kasan_record_aux_stack+0x8e/0xa0 [ 50.681753] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.682399] remove_vma+0x139/0x170 [ 50.682858] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.683422] do_vmi_munmap+0x1f1/0x2b0 [ 50.683905] __vm_munmap+0x138/0x3a0 [ 50.684371] __x64_sys_munmap+0x59/0x80 [ 50.684877] do_syscall_64+0x3f/0x90 [ 50.685367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.686015] [ 50.686235] The buggy address belongs to the object at ffff88801003b828 [ 50.686235] which belongs to the cache vm_area_struct of size 168 [ 50.687720] The buggy address is located 88 bytes inside of [ 50.687720] freed 168-byte region [ffff88801003b828, ffff88801003b8d0) [ 50.689143] [ 50.689359] The buggy address belongs to the physical page: [ 50.690014] page:000000003d4f4a0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1003b [ 50.691117] memcg:ffff88800cd25901 [ 50.691547] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.692190] page_type: 0xffffffff() [ 50.692638] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.693566] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd25901 [ 50.694479] page dumped because: kasan: bad access detected [ 50.695137] [ 50.695357] Memory state around the buggy address: [ 50.695933] ffff88801003b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 50.696795] ffff88801003b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 50.697659] >ffff88801003b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 50.698504] ^ [ 50.698920] ffff88801003b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.699778] ffff88801003b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 50.700636] ================================================================== [ 50.701700] Disabling lock debugging due to kernel taint [ 52.672204] BUG: Bad rss-counter state mm:0000000014fd1371 type:MM_FILEPAGES val:33 [ 52.673215] BUG: Bad rss-counter state mm:0000000014fd1371 type:MM_ANONPAGES val:22 [ 53.250147] BUG: Bad rss-counter state mm:000000008206a2e9 type:MM_FILEPAGES val:33 [ 53.251163] BUG: Bad rss-counter state mm:000000008206a2e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6484' (ECDSA) to the list of known hosts. 2023/06/19 19:43:37 fuzzer started 2023/06/19 19:43:38 dialing manager at localhost:44161 2023/06/19 19:43:38 checking machine... 2023/06/19 19:43:38 checking revisions... [ 54.010427] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:43:38 testing simple program... [ 54.059590] cgroup: Unknown subsys name 'net' [ 54.110461] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:43:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b7b2e RDX=1ffff11001673e7b RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800b39f3e8 RSP=ffff88800b39f320 R8 =ffffffff863b7b32 R9 =ffff88800b39f3d0 R10=0000000000038001 R11=000000000008b93b R12=ffff88800b39f3f0 R13=ffff88800b39f3d8 R14=0000000000000005 R15=ffff88800b39f390 RIP=ffffffff81130b54 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 00007f40b9cce900 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=000055aa22150954 CR3=000000000d456000 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=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 info registers vcpu 1 RAX=00000000000000a0 RBX=00000000000000a0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff88800bad0000 RSP=ffff88800f6677d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffffed100175a001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff821927de RFL=00000093 [--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 =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=00007fd262329b80 CR3=000000000f026000 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=fb081b44432e0dac2043d2a2ae7a0e1f XMM02=ec2efd57dc4c00df000000000011d240 XMM03=4a82acbb95270fbd000000000011d310 XMM04=c630a52d5d20b0b500000000000ae988 XMM05=59d5b690e0af863b0000000000133f78 XMM06=1798d0a96650e9c80000000000132700 XMM07=e042d86d42eb936e0000000000123ef0 XMM08=4a82acbb95270fbd000000000011d310 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000