syzkaller login: [ 31.087197] BUG: Bad rss-counter state mm:0000000016c3ea4d type:MM_FILEPAGES val:33 [ 31.088606] BUG: Bad rss-counter state mm:0000000016c3ea4d type:MM_ANONPAGES val:22 [ 31.279560] ================================================================== [ 31.280638] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.281901] Read of size 8 at addr ffff8880139fa3f8 by task sshd/219 [ 31.282784] [ 31.283006] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.283894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.284898] Call Trace: [ 31.285226] [ 31.285512] dump_stack_lvl+0x91/0xf0 [ 31.286017] print_report+0xcc/0x620 [ 31.286509] ? __virt_addr_valid+0x102/0x340 [ 31.287078] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287699] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288319] kasan_report+0xbe/0xf0 [ 31.288799] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.289422] vma_interval_tree_remove+0xc75/0xec0 [ 31.290051] vma_prepare+0xc54/0x11a0 [ 31.290527] __split_vma+0x5af/0x950 [ 31.291007] ? __pfx___split_vma+0x10/0x10 [ 31.291547] ? find_held_lock+0x2c/0x110 [ 31.292067] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.292639] ? lock_is_held_type+0x9f/0x120 [ 31.293179] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.293791] ? mtree_range_walk+0x632/0x900 [ 31.294342] ? mas_walk+0x5c7/0x7c0 [ 31.294825] do_vmi_munmap+0x1f1/0x2b0 [ 31.295316] mmap_region+0x1f9/0x2660 [ 31.295796] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.296311] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.297017] ? __pfx_lock_acquire+0x10/0x10 [ 31.297548] ? __pfx_mmap_region+0x10/0x10 [ 31.298093] ? security_mmap_addr+0x7d/0xa0 [ 31.298623] ? get_unmapped_area+0x1f5/0x3f0 [ 31.299181] do_mmap+0x854/0xf00 [ 31.299616] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.300113] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.300679] ksys_mmap_pgoff+0x3af/0x500 [ 31.301186] do_syscall_64+0x3f/0x90 [ 31.301670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.302348] RIP: 0033:0x7effa3a8bd82 [ 31.302812] 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 [ 31.304935] RSP: 002b:00007fff225417c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.305844] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effa3a8bd82 [ 31.306692] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effa2ec5000 [ 31.307547] RBP: 00007effa2ec5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.308389] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644db9e6ec0 [ 31.309247] R13: 00007fff225417e0 R14: 00007fff22541810 R15: 00007fff22541b70 [ 31.310128] [ 31.310423] [ 31.310638] Allocated by task 212: [ 31.311070] kasan_save_stack+0x22/0x50 [ 31.311574] kasan_set_track+0x25/0x30 [ 31.312067] __kasan_slab_alloc+0x59/0x70 [ 31.312593] kmem_cache_alloc+0x16b/0x370 [ 31.313104] vm_area_dup+0x20/0x160 [ 31.313561] __split_vma+0x170/0x950 [ 31.314048] split_vma+0xc6/0x110 [ 31.314485] mprotect_fixup+0x8d2/0xb30 [ 31.314983] do_mprotect_pkey+0x87e/0xd40 [ 31.315513] __x64_sys_mprotect+0x78/0xc0 [ 31.316046] do_syscall_64+0x3f/0x90 [ 31.316531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317184] [ 31.317406] Freed by task 202: [ 31.317810] kasan_save_stack+0x22/0x50 [ 31.318336] kasan_set_track+0x25/0x30 [ 31.318838] kasan_save_free_info+0x2b/0x50 [ 31.319377] __kasan_slab_free+0x10a/0x190 [ 31.319919] kmem_cache_free+0x10d/0x4d0 [ 31.320435] rcu_core+0x8c8/0x2860 [ 31.320876] __do_softirq+0x1b7/0x7d4 [ 31.321356] [ 31.321572] Last potentially related work creation: [ 31.322179] kasan_save_stack+0x22/0x50 [ 31.322687] __kasan_record_aux_stack+0x8e/0xa0 [ 31.323286] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.323924] remove_vma+0x139/0x170 [ 31.324380] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.324946] do_vmi_munmap+0x1f1/0x2b0 [ 31.325440] __vm_munmap+0x138/0x3a0 [ 31.325914] __x64_sys_munmap+0x59/0x80 [ 31.326423] do_syscall_64+0x3f/0x90 [ 31.326904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.327545] [ 31.327770] The buggy address belongs to the object at ffff8880139fa3a0 [ 31.327770] which belongs to the cache vm_area_struct of size 168 [ 31.329225] The buggy address is located 88 bytes inside of [ 31.329225] freed 168-byte region [ffff8880139fa3a0, ffff8880139fa448) [ 31.330649] [ 31.330866] The buggy address belongs to the physical page: [ 31.331525] page:000000004effda35 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x139fa [ 31.332627] memcg:ffff88800e125a01 [ 31.333052] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.333752] page_type: 0xffffffff() [ 31.334203] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a0280 dead000000000007 [ 31.335117] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e125a01 [ 31.336029] page dumped because: kasan: bad access detected [ 31.336693] [ 31.336908] Memory state around the buggy address: [ 31.337486] ffff8880139fa280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.338366] ffff8880139fa300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.339229] >ffff8880139fa380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.340087] ^ [ 31.340936] ffff8880139fa400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.341809] ffff8880139fa480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.342666] ================================================================== [ 31.343730] Disabling lock debugging due to kernel taint [ 34.293012] BUG: Bad rss-counter state mm:000000002f6e16f6 type:MM_FILEPAGES val:33 [ 34.294147] BUG: Bad rss-counter state mm:000000002f6e16f6 type:MM_ANONPAGES val:22 [ 34.831251] BUG: Bad rss-counter state mm:00000000b3acd1b3 type:MM_FILEPAGES val:33 [ 34.832465] BUG: Bad rss-counter state mm:00000000b3acd1b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20105' (ECDSA) to the list of known hosts. 2023/06/20 18:16:50 fuzzer started 2023/06/20 18:16:50 dialing manager at localhost:36067 2023/06/20 18:16:50 checking machine... 2023/06/20 18:16:50 checking revisions... [ 35.495385] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:16:50 testing simple program... [ 35.547738] cgroup: Unknown subsys name 'net' [ 35.586051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:16:50 Registers: info registers vcpu 0 RAX=1ffff110027600f7 RBX=ffff888013b00788 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888013b007b8 RBP=ffff888013aff660 RSP=ffff88800fb8f8e8 R8 =0000000000000001 R9 =ffffed1001f71f11 R10=0000000000000003 R11=0000000000110010 R12=dffffc0000000000 R13=ffff888016267000 R14=ffffffff81803033 R15=0000000080110010 RIP=ffffffff818464ec 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 00007f56ccd56900 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=00007ffe62eee000 CR3=000000000f1e4000 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=0000000000000003 RBX=0000000000000002 RCX=ffffffff813782f7 RDX=0000000000000003 RSI=ffffffff860d2fd0 RDI=ffffffff85dba0f4 RBP=ffff88806cf09ad0 RSP=ffff88806cf099d0 R8 =ffffffff860d2fd0 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000000fdcc R12=ffffffff85dba0fc R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff8112fc21 RFL=00000206 [-----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 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=00007feaccc017e0 CR3=000000000d7f2000 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=c8e598807f8051b8f44b0b549ba5301f XMM02=ec2efd57dc4c00df000000000011b7a0 XMM03=e141f6f4cb9f2738000000000011b870 XMM04=9dd4c73975c7623500000000000ae988 XMM05=7f6b6772a8d3f6fd00000000001339c8 XMM06=806171799158d9670000000000132a68 XMM07=e042d86d42eb936e0000000000123008 XMM08=e141f6f4cb9f2738000000000011b870 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000