syzkaller login: [ 31.371954] BUG: Bad rss-counter state mm:00000000fcdd2238 type:MM_FILEPAGES val:33 [ 31.373143] BUG: Bad rss-counter state mm:00000000fcdd2238 type:MM_ANONPAGES val:22 [ 31.412021] ================================================================== [ 31.413009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.414028] Read of size 8 at addr ffff888018116a50 by task sshd/219 [ 31.414953] [ 31.415200] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.416078] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.417046] Call Trace: [ 31.417390] <TASK> [ 31.417685] dump_stack_lvl+0x91/0xf0 [ 31.418193] print_report+0xcc/0x620 [ 31.418686] ? __virt_addr_valid+0x102/0x340 [ 31.419253] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.419877] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.420515] kasan_report+0xbe/0xf0 [ 31.420990] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.421633] vma_interval_tree_remove+0xc75/0xec0 [ 31.422241] vma_prepare+0xc54/0x11a0 [ 31.422730] __split_vma+0x5af/0x950 [ 31.423204] ? __pfx___split_vma+0x10/0x10 [ 31.423737] ? find_held_lock+0x2c/0x110 [ 31.424267] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.424843] ? lock_is_held_type+0x9f/0x120 [ 31.425391] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.426001] ? mtree_range_walk+0x632/0x900 [ 31.426560] ? mas_walk+0x5c7/0x7c0 [ 31.427040] do_vmi_munmap+0x1f1/0x2b0 [ 31.427535] mmap_region+0x1f9/0x2660 [ 31.428022] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.428542] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.429261] ? __pfx_lock_acquire+0x10/0x10 [ 31.429812] ? __pfx_mmap_region+0x10/0x10 [ 31.430345] ? security_mmap_addr+0x7d/0xa0 [ 31.430878] ? get_unmapped_area+0x1f5/0x3f0 [ 31.431429] do_mmap+0x854/0xf00 [ 31.431872] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.432365] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.432927] ksys_mmap_pgoff+0x3af/0x500 [ 31.433441] do_syscall_64+0x3f/0x90 [ 31.433919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.434566] RIP: 0033:0x7fb6f4a82d82 [ 31.435021] 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 [ 31.437152] RSP: 002b:00007ffef7ad5af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.438067] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb6f4a82d82 [ 31.438927] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb6f3ebc000 [ 31.439778] RBP: 00007fb6f3ebc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.440643] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560380325ec0 [ 31.441519] R13: 00007ffef7ad5b10 R14: 00007ffef7ad5b40 R15: 00007ffef7ad5ea0 [ 31.442378] </TASK> [ 31.442670] [ 31.442886] Allocated by task 212: [ 31.443316] kasan_save_stack+0x22/0x50 [ 31.443828] kasan_set_track+0x25/0x30 [ 31.444325] __kasan_slab_alloc+0x59/0x70 [ 31.444857] kmem_cache_alloc+0x16b/0x370 [ 31.445381] vm_area_dup+0x20/0x160 [ 31.445836] __split_vma+0x170/0x950 [ 31.446317] split_vma+0xc6/0x110 [ 31.446758] mprotect_fixup+0x8d2/0xb30 [ 31.447269] do_mprotect_pkey+0x87e/0xd40 [ 31.447790] __x64_sys_mprotect+0x78/0xc0 [ 31.448316] do_syscall_64+0x3f/0x90 [ 31.448799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.449464] [ 31.449683] Freed by task 13: [ 31.450069] kasan_save_stack+0x22/0x50 [ 31.450574] kasan_set_track+0x25/0x30 [ 31.451071] kasan_save_free_info+0x2b/0x50 [ 31.451603] __kasan_slab_free+0x10a/0x190 [ 31.452140] kmem_cache_free+0x10d/0x4d0 [ 31.452645] rcu_core+0x8c8/0x2860 [ 31.453089] __do_softirq+0x1b7/0x7d4 [ 31.453582] [ 31.453801] Last potentially related work creation: [ 31.454390] kasan_save_stack+0x22/0x50 [ 31.454891] __kasan_record_aux_stack+0x8e/0xa0 [ 31.455477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.456128] remove_vma+0x139/0x170 [ 31.456582] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.457223] do_vmi_munmap+0x1f1/0x2b0 [ 31.457721] __vm_munmap+0x138/0x3a0 [ 31.458186] __x64_sys_munmap+0x59/0x80 [ 31.458677] do_syscall_64+0x3f/0x90 [ 31.459151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.459793] [ 31.460009] Second to last potentially related work creation: [ 31.460690] kasan_save_stack+0x22/0x50 [ 31.461187] __kasan_record_aux_stack+0x8e/0xa0 [ 31.461774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.462416] remove_vma+0x139/0x170 [ 31.462862] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.463418] do_vmi_munmap+0x1f1/0x2b0 [ 31.463905] mmap_region+0x1f9/0x2660 [ 31.464388] do_mmap+0x854/0xf00 [ 31.464824] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.465314] ksys_mmap_pgoff+0x3af/0x500 [ 31.465830] do_syscall_64+0x3f/0x90 [ 31.466304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.466943] [ 31.467158] The buggy address belongs to the object at ffff8880181169f8 [ 31.467158] which belongs to the cache vm_area_struct of size 168 [ 31.468619] The buggy address is located 88 bytes inside of [ 31.468619] freed 168-byte region [ffff8880181169f8, ffff888018116aa0) [ 31.470016] [ 31.470235] The buggy address belongs to the physical page: [ 31.470885] page:00000000832a97c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18116 [ 31.471978] memcg:ffff88801a0d4b01 [ 31.472404] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.473062] page_type: 0xffffffff() [ 31.473523] raw: 0100000000000200 ffff8880087a0c80 ffffea00003994c0 dead000000000004 [ 31.474459] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0d4b01 [ 31.475381] page dumped because: kasan: bad access detected [ 31.476056] [ 31.476270] Memory state around the buggy address: [ 31.476861] ffff888018116900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.477732] ffff888018116980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.478596] >ffff888018116a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.479461] ^ [ 31.480185] ffff888018116a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.481043] ffff888018116b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.481953] ================================================================== [ 31.482874] Disabling lock debugging due to kernel taint [ 33.409834] BUG: Bad rss-counter state mm:000000002851d3de type:MM_FILEPAGES val:33 [ 33.411058] BUG: Bad rss-counter state mm:000000002851d3de type:MM_ANONPAGES val:22 [ 33.761893] BUG: Bad rss-counter state mm:0000000014a8e3c7 type:MM_FILEPAGES val:33 [ 33.762895] BUG: Bad rss-counter state mm:0000000014a8e3c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38193' (ECDSA) to the list of known hosts. 2023/06/20 11:33:16 fuzzer started 2023/06/20 11:33:17 dialing manager at localhost:36067 2023/06/20 11:33:17 checking machine... 2023/06/20 11:33:17 checking revisions... [ 34.490171] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:33:17 testing simple program... [ 34.538223] cgroup: Unknown subsys name 'net' [ 34.575213] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:33:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fd94110ff90 CR3=000000000f828000 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=e6c65d6ea529f890f349033ab5a026ba XMM02=000000000011a8e0ec2efd57dc4c00df XMM03=00000000001212a024ee5d4492ac59ab XMM04=3d494a49466615dd00000000000ae988 XMM05=dfcdbad4f1609c3700000000001321a0 XMM06=0b0ab7807e7e832b0000000000131378 XMM07=e042d86d42eb936e0000000000121520 XMM08=24ee5d4492ac59ab000000000011a940 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85d92c20 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c20 RSP=ffff888019f8f828 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=ffffffff85d92c20 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 00007f51ce4bf900 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=00007fff798de000 CR3=0000000009564000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000