syzkaller login: [ 28.833941] BUG: Bad rss-counter state mm:00000000c3971305 type:MM_FILEPAGES val:33 [ 28.835093] BUG: Bad rss-counter state mm:00000000c3971305 type:MM_ANONPAGES val:22 [ 28.868537] ================================================================== [ 28.869633] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.870742] Read of size 8 at addr ffff888016bdbb38 by task sshd/220 [ 28.871654] [ 28.871912] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.872952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.874088] Call Trace: [ 28.874461] <TASK> [ 28.874795] dump_stack_lvl+0x91/0xf0 [ 28.875369] print_report+0xcc/0x620 [ 28.875944] ? __virt_addr_valid+0x102/0x340 [ 28.876595] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.877335] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.878066] kasan_report+0xbe/0xf0 [ 28.878629] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.879359] vma_interval_tree_remove+0xc75/0xec0 [ 28.880154] vma_prepare+0xc54/0x11a0 [ 28.880710] __split_vma+0x5af/0x950 [ 28.881218] ? __pfx___split_vma+0x10/0x10 [ 28.881756] ? find_held_lock+0x2c/0x110 [ 28.882289] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.882877] ? lock_is_held_type+0x9f/0x120 [ 28.883440] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.884057] ? mtree_range_walk+0x632/0x900 [ 28.884619] ? mas_walk+0x5c7/0x7c0 [ 28.885117] do_vmi_munmap+0x1f1/0x2b0 [ 28.885611] mmap_region+0x1f9/0x2660 [ 28.886094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.886604] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.887313] ? __pfx_lock_acquire+0x10/0x10 [ 28.887839] ? __pfx_mmap_region+0x10/0x10 [ 28.888363] ? security_mmap_addr+0x7d/0xa0 [ 28.888896] ? get_unmapped_area+0x1f5/0x3f0 [ 28.889437] do_mmap+0x854/0xf00 [ 28.889872] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.890362] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.890918] ksys_mmap_pgoff+0x3af/0x500 [ 28.891421] do_syscall_64+0x3f/0x90 [ 28.891896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.892536] RIP: 0033:0x7fa40ed82d82 [ 28.893013] 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 [ 28.895118] RSP: 002b:00007fff48f645f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.896018] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa40ed82d82 [ 28.896860] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa40e1bc000 [ 28.897708] RBP: 00007fa40e1bc000 R08: 0000000000000009 R09: 0000000000001000 [ 28.898548] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e3e38cec0 [ 28.899387] R13: 00007fff48f64610 R14: 00007fff48f64640 R15: 00007fff48f649a0 [ 28.900245] </TASK> [ 28.900537] [ 28.900754] Allocated by task 213: [ 28.901195] kasan_save_stack+0x22/0x50 [ 28.901709] kasan_set_track+0x25/0x30 [ 28.902202] __kasan_slab_alloc+0x59/0x70 [ 28.902719] kmem_cache_alloc+0x16b/0x370 [ 28.903233] vm_area_dup+0x20/0x160 [ 28.903686] __split_vma+0x170/0x950 [ 28.904149] split_vma+0xc6/0x110 [ 28.904587] mprotect_fixup+0x8d2/0xb30 [ 28.905113] do_mprotect_pkey+0x87e/0xd40 [ 28.905633] __x64_sys_mprotect+0x78/0xc0 [ 28.906152] do_syscall_64+0x3f/0x90 [ 28.906632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.907269] [ 28.907485] Freed by task 213: [ 28.907880] kasan_save_stack+0x22/0x50 [ 28.908382] kasan_set_track+0x25/0x30 [ 28.908881] kasan_save_free_info+0x2b/0x50 [ 28.909419] __kasan_slab_free+0x10a/0x190 [ 28.909959] kmem_cache_free+0x10d/0x4d0 [ 28.910459] rcu_core+0x8c8/0x2860 [ 28.910903] __do_softirq+0x1b7/0x7d4 [ 28.911382] [ 28.911598] Last potentially related work creation: [ 28.912180] kasan_save_stack+0x22/0x50 [ 28.912679] __kasan_record_aux_stack+0x8e/0xa0 [ 28.913259] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.913897] remove_vma+0x139/0x170 [ 28.914345] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.914903] do_vmi_munmap+0x1f1/0x2b0 [ 28.915384] __vm_munmap+0x138/0x3a0 [ 28.915850] __x64_sys_munmap+0x59/0x80 [ 28.916343] do_syscall_64+0x3f/0x90 [ 28.916819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917495] [ 28.917711] The buggy address belongs to the object at ffff888016bdbae0 [ 28.917711] which belongs to the cache vm_area_struct of size 168 [ 28.919191] The buggy address is located 88 bytes inside of [ 28.919191] freed 168-byte region [ffff888016bdbae0, ffff888016bdbb88) [ 28.920589] [ 28.920810] The buggy address belongs to the physical page: [ 28.921479] page:00000000c3ea7d09 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bdb [ 28.922572] memcg:ffff888019ff3d01 [ 28.922996] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.923705] page_type: 0xffffffff() [ 28.924155] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.925090] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ff3d01 [ 28.925991] page dumped because: kasan: bad access detected [ 28.926650] [ 28.926866] Memory state around the buggy address: [ 28.927453] ffff888016bdba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.928312] ffff888016bdba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 28.929170] >ffff888016bdbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.930015] ^ [ 28.930623] ffff888016bdbb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.931478] ffff888016bdbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.932321] ================================================================== [ 28.933312] Disabling lock debugging due to kernel taint [ 30.939073] BUG: Bad rss-counter state mm:000000001039aaa5 type:MM_FILEPAGES val:33 [ 30.940288] BUG: Bad rss-counter state mm:000000001039aaa5 type:MM_ANONPAGES val:22 [ 31.390061] BUG: Bad rss-counter state mm:00000000c8dd39ba type:MM_FILEPAGES val:33 [ 31.390973] BUG: Bad rss-counter state mm:00000000c8dd39ba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52444' (ECDSA) to the list of known hosts. 2023/06/21 05:30:44 fuzzer started 2023/06/21 05:30:45 dialing manager at localhost:36067 2023/06/21 05:30:45 checking machine... 2023/06/21 05:30:45 checking revisions... [ 32.103257] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:30:45 testing simple program... [ 32.155533] cgroup: Unknown subsys name 'net' [ 32.202199] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:30:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85dfdcb8 RCX=ffffffff81809adc RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffffffff85dfdcb8 RSP=ffff88800ee3f5f0 R8 =ffffffff86138976 R9 =ffff88800ee3f6e8 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcb8 R13=ffffffff85dfdcb8 R14=ffffffff85dfdcb8 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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 00007efd7fc93900 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=00007ffc37cd4000 CR3=000000001a3b8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f628c558120 CR3=000000000d98e000 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=80dcab064cdeca8b8940bab723352a7a XMM02=ec2efd57dc4c00df000000000011d670 XMM03=58156d940857cbfd000000000011d740 XMM04=b8f60ba132b853ef00000000000ae988 XMM05=19e9129bd510f2350000000000131c80 XMM06=4fda316b135da52b0000000000131b08 XMM07=e042d86d42eb936e0000000000122060 XMM08=58156d940857cbfd000000000011d740 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000