syzkaller login: [ 31.200854] BUG: Bad rss-counter state mm:00000000a2ba36eb type:MM_FILEPAGES val:33 [ 31.202238] BUG: Bad rss-counter state mm:00000000a2ba36eb type:MM_ANONPAGES val:22 [ 31.348280] ================================================================== [ 31.349177] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.350101] Read of size 8 at addr ffff888009614058 by task sshd/220 [ 31.350966] [ 31.351181] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.352042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.353037] Call Trace: [ 31.353354] [ 31.353636] dump_stack_lvl+0x91/0xf0 [ 31.354130] print_report+0xcc/0x620 [ 31.354613] ? __virt_addr_valid+0x102/0x340 [ 31.355188] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.355803] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.356416] kasan_report+0xbe/0xf0 [ 31.356890] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.357515] vma_interval_tree_remove+0xc75/0xec0 [ 31.358128] vma_prepare+0xc54/0x11a0 [ 31.358610] __split_vma+0x5af/0x950 [ 31.359092] ? __pfx___split_vma+0x10/0x10 [ 31.359627] ? find_held_lock+0x2c/0x110 [ 31.360149] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.360712] ? lock_is_held_type+0x9f/0x120 [ 31.361264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.361866] ? mtree_range_walk+0x632/0x900 [ 31.362418] ? mas_walk+0x5c7/0x7c0 [ 31.362902] do_vmi_munmap+0x1f1/0x2b0 [ 31.363398] mmap_region+0x1f9/0x2660 [ 31.363884] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.364411] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.365128] ? __pfx_lock_acquire+0x10/0x10 [ 31.365671] ? __pfx_mmap_region+0x10/0x10 [ 31.366207] ? security_mmap_addr+0x7d/0xa0 [ 31.366755] ? get_unmapped_area+0x1f5/0x3f0 [ 31.367299] do_mmap+0x854/0xf00 [ 31.367740] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.368235] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.368799] ksys_mmap_pgoff+0x3af/0x500 [ 31.369309] do_syscall_64+0x3f/0x90 [ 31.369792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.370448] RIP: 0033:0x7f6edf674d82 [ 31.370911] 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 [ 31.373030] RSP: 002b:00007ffde7f0d1e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.373938] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6edf674d82 [ 31.374799] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6edeaae000 [ 31.375650] RBP: 00007f6edeaae000 R08: 0000000000000009 R09: 0000000000001000 [ 31.376482] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d663f27f70 [ 31.377327] R13: 00007ffde7f0d200 R14: 00007ffde7f0d230 R15: 00007ffde7f0d590 [ 31.378187] [ 31.378480] [ 31.378698] Allocated by task 213: [ 31.379121] kasan_save_stack+0x22/0x50 [ 31.379624] kasan_set_track+0x25/0x30 [ 31.380117] __kasan_slab_alloc+0x59/0x70 [ 31.380632] kmem_cache_alloc+0x16b/0x370 [ 31.381143] vm_area_dup+0x20/0x160 [ 31.381590] __split_vma+0x170/0x950 [ 31.382047] split_vma+0xc6/0x110 [ 31.382480] mprotect_fixup+0x8d2/0xb30 [ 31.383000] do_mprotect_pkey+0x87e/0xd40 [ 31.383523] __x64_sys_mprotect+0x78/0xc0 [ 31.384048] do_syscall_64+0x3f/0x90 [ 31.384528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.385176] [ 31.385391] Freed by task 213: [ 31.385783] kasan_save_stack+0x22/0x50 [ 31.386286] kasan_set_track+0x25/0x30 [ 31.386794] kasan_save_free_info+0x2b/0x50 [ 31.387319] __kasan_slab_free+0x10a/0x190 [ 31.387855] kmem_cache_free+0x10d/0x4d0 [ 31.388360] rcu_core+0x8c8/0x2860 [ 31.388810] __do_softirq+0x1b7/0x7d4 [ 31.389294] [ 31.389507] Last potentially related work creation: [ 31.390094] kasan_save_stack+0x22/0x50 [ 31.390597] __kasan_record_aux_stack+0x8e/0xa0 [ 31.391173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.391816] remove_vma+0x139/0x170 [ 31.392263] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.392819] do_vmi_munmap+0x1f1/0x2b0 [ 31.393301] __vm_munmap+0x138/0x3a0 [ 31.393769] __x64_sys_munmap+0x59/0x80 [ 31.394278] do_syscall_64+0x3f/0x90 [ 31.394773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395443] [ 31.395662] The buggy address belongs to the object at ffff888009614000 [ 31.395662] which belongs to the cache vm_area_struct of size 168 [ 31.397165] The buggy address is located 88 bytes inside of [ 31.397165] freed 168-byte region [ffff888009614000, ffff8880096140a8) [ 31.398557] [ 31.398783] The buggy address belongs to the physical page: [ 31.399443] page:00000000f2e946bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9614 [ 31.400568] memcg:ffff888019c89801 [ 31.401001] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.401663] page_type: 0xffffffff() [ 31.402115] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.403042] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c89801 [ 31.403956] page dumped because: kasan: bad access detected [ 31.404634] [ 31.404850] Memory state around the buggy address: [ 31.405430] ffff888009613f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.406298] ffff888009613f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.407180] >ffff888009614000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.408032] ^ [ 31.408783] ffff888009614080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.409658] ffff888009614100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.410513] ================================================================== [ 31.411503] Disabling lock debugging due to kernel taint [ 33.272883] BUG: Bad rss-counter state mm:00000000854d753a type:MM_FILEPAGES val:33 [ 33.274011] BUG: Bad rss-counter state mm:00000000854d753a type:MM_ANONPAGES val:22 [ 33.744866] BUG: Bad rss-counter state mm:00000000e56e5223 type:MM_FILEPAGES val:33 [ 33.745855] BUG: Bad rss-counter state mm:00000000e56e5223 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29123' (ECDSA) to the list of known hosts. 2023/06/20 23:03:19 fuzzer started 2023/06/20 23:03:20 dialing manager at localhost:36067 2023/06/20 23:03:20 checking machine... 2023/06/20 23:03:20 checking revisions... [ 34.519903] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:03:20 testing simple program... [ 34.570444] cgroup: Unknown subsys name 'net' [ 34.626686] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:03:19 Registers: info registers vcpu 0 RAX=1ffffffff0bbfb97 RBX=ffffffff85dfdcbc RCX=ffffffff81809adc RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffffffff85dfdcb8 RSP=ffff88806ce099e0 R8 =ffffffff86138976 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcc0 R13=ffffffff85dfdcb8 R14=ffffffff85dfdcb8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 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=00007f3d00795250 CR3=00000000158fe000 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=2039313a33303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a33303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801675f430 RCX=ffffffff860d8256 RDX=1ffff11002cebe61 RSI=0000000000000000 RDI=ffff88801675f308 RBP=ffff888016758000 RSP=ffff88801675f288 R8 =ffffffff860d825a R9 =ffff88801675f338 R10=0000000000038001 R11=0000000000010b8d R12=ffff88801675f358 R13=ffff88801675f340 R14=ffff88801675f430 R15=ffff88801675f2f8 RIP=ffffffff81131ca6 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 00007fd3b4596900 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=00007fd3b4565008 CR3=000000000e524000 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=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