syzkaller login: [ 26.732972] BUG: Bad rss-counter state mm:00000000597854fd type:MM_FILEPAGES val:33 [ 26.734195] BUG: Bad rss-counter state mm:00000000597854fd type:MM_ANONPAGES val:22 [ 26.776039] ================================================================== [ 26.777149] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.778318] Read of size 8 at addr ffff888012f18968 by task sshd/220 [ 26.779196] [ 26.779449] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.780551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.781810] Call Trace: [ 26.782257] [ 26.782649] dump_stack_lvl+0x91/0xf0 [ 26.783206] print_report+0xcc/0x620 [ 26.783748] ? __virt_addr_valid+0x102/0x340 [ 26.784384] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.785239] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.786019] kasan_report+0xbe/0xf0 [ 26.786665] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.787467] vma_interval_tree_remove+0xc75/0xec0 [ 26.788247] vma_prepare+0xc54/0x11a0 [ 26.788818] __split_vma+0x5af/0x950 [ 26.789452] ? __pfx___split_vma+0x10/0x10 [ 26.790074] ? find_held_lock+0x2c/0x110 [ 26.790708] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.791414] ? lock_is_held_type+0x9f/0x120 [ 26.792042] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.792788] ? mtree_range_walk+0x632/0x900 [ 26.793419] ? mas_walk+0x5c7/0x7c0 [ 26.793968] do_vmi_munmap+0x1f1/0x2b0 [ 26.794533] mmap_region+0x1f9/0x2660 [ 26.795083] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.795663] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.796499] ? __pfx_lock_acquire+0x10/0x10 [ 26.797093] ? __pfx_mmap_region+0x10/0x10 [ 26.797749] ? security_mmap_addr+0x7d/0xa0 [ 26.798362] ? get_unmapped_area+0x1f5/0x3f0 [ 26.799007] do_mmap+0x854/0xf00 [ 26.799490] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.800071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.800780] ksys_mmap_pgoff+0x3af/0x500 [ 26.801411] do_syscall_64+0x3f/0x90 [ 26.801971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.802727] RIP: 0033:0x7f6bd8a1ad82 [ 26.803252] 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 [ 26.805809] RSP: 002b:00007ffc69058108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.806848] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6bd8a1ad82 [ 26.807861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6bd7e54000 [ 26.808855] RBP: 00007f6bd7e54000 R08: 0000000000000009 R09: 0000000000001000 [ 26.809867] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c17c91ec0 [ 26.810888] R13: 00007ffc69058120 R14: 00007ffc69058150 R15: 00007ffc690584b0 [ 26.811901] [ 26.812249] [ 26.812505] Allocated by task 213: [ 26.813004] kasan_save_stack+0x22/0x50 [ 26.813615] kasan_set_track+0x25/0x30 [ 26.814181] __kasan_slab_alloc+0x59/0x70 [ 26.814788] kmem_cache_alloc+0x16b/0x370 [ 26.815386] vm_area_dup+0x20/0x160 [ 26.815915] __split_vma+0x170/0x950 [ 26.816441] split_vma+0xc6/0x110 [ 26.817003] mprotect_fixup+0x8d2/0xb30 [ 26.817596] do_mprotect_pkey+0x87e/0xd40 [ 26.818185] __x64_sys_mprotect+0x78/0xc0 [ 26.818776] do_syscall_64+0x3f/0x90 [ 26.819315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.820048] [ 26.820299] Freed by task 213: [ 26.820745] kasan_save_stack+0x22/0x50 [ 26.821315] kasan_set_track+0x25/0x30 [ 26.821890] kasan_save_free_info+0x2b/0x50 [ 26.822504] __kasan_slab_free+0x10a/0x190 [ 26.823112] kmem_cache_free+0x10d/0x4d0 [ 26.823687] rcu_core+0x8c8/0x2860 [ 26.824193] __do_softirq+0x1b7/0x7d4 [ 26.824738] [ 26.824982] Last potentially related work creation: [ 26.825668] kasan_save_stack+0x22/0x50 [ 26.826239] __kasan_record_aux_stack+0x8e/0xa0 [ 26.826893] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.827628] remove_vma+0x139/0x170 [ 26.828155] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.828788] do_vmi_munmap+0x1f1/0x2b0 [ 26.829333] __vm_munmap+0x138/0x3a0 [ 26.829881] __x64_sys_munmap+0x59/0x80 [ 26.830441] do_syscall_64+0x3f/0x90 [ 26.830971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.831689] [ 26.831932] The buggy address belongs to the object at ffff888012f18910 [ 26.831932] which belongs to the cache vm_area_struct of size 168 [ 26.833592] The buggy address is located 88 bytes inside of [ 26.833592] freed 168-byte region [ffff888012f18910, ffff888012f189b8) [ 26.835190] [ 26.835437] The buggy address belongs to the physical page: [ 26.836186] page:0000000062b76675 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12f18 [ 26.837432] memcg:ffff888009689e01 [ 26.837918] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.838658] page_type: 0xffffffff() [ 26.839160] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.840199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009689e01 [ 26.841226] page dumped because: kasan: bad access detected [ 26.841982] [ 26.842231] Memory state around the buggy address: [ 26.842908] ffff888012f18800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 26.843889] ffff888012f18880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 26.844870] >ffff888012f18900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.845862] ^ [ 26.846754] ffff888012f18980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 26.847729] ffff888012f18a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.848702] ================================================================== [ 26.849850] Disabling lock debugging due to kernel taint [ 29.066710] BUG: Bad rss-counter state mm:000000007db8e635 type:MM_FILEPAGES val:33 [ 29.067769] BUG: Bad rss-counter state mm:000000007db8e635 type:MM_ANONPAGES val:22 [ 29.641968] BUG: Bad rss-counter state mm:00000000654b13b6 type:MM_FILEPAGES val:33 [ 29.642961] BUG: Bad rss-counter state mm:00000000654b13b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11587' (ECDSA) to the list of known hosts. 2023/06/20 05:42:49 fuzzer started 2023/06/20 05:42:50 dialing manager at localhost:44161 2023/06/20 05:42:50 checking machine... 2023/06/20 05:42:50 checking revisions... [ 30.415348] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:42:50 testing simple program... [ 30.470230] cgroup: Unknown subsys name 'net' [ 30.519157] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:42:46 Registers: info registers vcpu 0 RAX=1ffff11002c5ff5b RBX=0000000000000008 RCX=0000000000000001 RDX=0000000000000dc0 RSI=000000000000000d RDI=ffff8880162ffad8 RBP=dffffc0000000000 RSP=ffff8880162ffa08 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000d R13=0000000000000dc0 R14=ffff8880162ffa98 R15=0000000000000001 RIP=ffffffff813ad5ca 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 00007f7a9b3db900 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=00007f7a9b9930b0 CR3=000000000c424000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2bf798d000 CR3=000000000cc98000 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=28dc2b7dc7dfa9a9654a0f1015800262 XMM02=000000000011d0d0ec2efd57dc4c00df XMM03=0000000000123b505df7e49094837fc4 XMM04=7d51134b454d7e2700000000000ae988 XMM05=a8eb2d4ead2340b100000000001339b0 XMM06=4fda316b135da52b0000000000133550 XMM07=e042d86d42eb936e0000000000123e28 XMM08=5df7e49094837fc4000000000011d130 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000