syzkaller login: [ 30.810143] BUG: Bad rss-counter state mm:0000000006cf6d71 type:MM_FILEPAGES val:33 [ 30.811615] BUG: Bad rss-counter state mm:0000000006cf6d71 type:MM_ANONPAGES val:22 [ 30.964776] ================================================================== [ 30.965867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.966873] Read of size 8 at addr ffff88800f728310 by task sshd/220 [ 30.967758] [ 30.967978] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.968866] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.969865] Call Trace: [ 30.970183] [ 30.970474] dump_stack_lvl+0x91/0xf0 [ 30.970960] print_report+0xcc/0x620 [ 30.971446] ? __virt_addr_valid+0x102/0x340 [ 30.972008] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.972623] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.973233] kasan_report+0xbe/0xf0 [ 30.973716] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.974341] vma_interval_tree_remove+0xc75/0xec0 [ 30.974945] vma_prepare+0xc54/0x11a0 [ 30.975423] __split_vma+0x5af/0x950 [ 30.975909] ? __pfx___split_vma+0x10/0x10 [ 30.976442] ? find_held_lock+0x2c/0x110 [ 30.976976] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.977536] ? lock_is_held_type+0x9f/0x120 [ 30.978098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.978705] ? mtree_range_walk+0x632/0x900 [ 30.979255] ? mas_walk+0x5c7/0x7c0 [ 30.979738] do_vmi_munmap+0x1f1/0x2b0 [ 30.980235] mmap_region+0x1f9/0x2660 [ 30.980734] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.981240] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.981965] ? __pfx_lock_acquire+0x10/0x10 [ 30.982500] ? __pfx_mmap_region+0x10/0x10 [ 30.983036] ? security_mmap_addr+0x7d/0xa0 [ 30.983574] ? get_unmapped_area+0x1f5/0x3f0 [ 30.984125] do_mmap+0x854/0xf00 [ 30.984562] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.985053] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.985628] ksys_mmap_pgoff+0x3af/0x500 [ 30.986158] do_syscall_64+0x3f/0x90 [ 30.986647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.987290] RIP: 0033:0x7fcf8bdecd82 [ 30.987749] 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 [ 30.989877] RSP: 002b:00007ffcf5de4df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.990783] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf8bdecd82 [ 30.991638] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf8b226000 [ 30.992505] RBP: 00007fcf8b226000 R08: 0000000000000009 R09: 0000000000001000 [ 30.993348] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6d0ebeec0 [ 30.994201] R13: 00007ffcf5de4e10 R14: 00007ffcf5de4e40 R15: 00007ffcf5de51a0 [ 30.995058] [ 30.995349] [ 30.995563] Allocated by task 213: [ 30.996003] kasan_save_stack+0x22/0x50 [ 30.996511] kasan_set_track+0x25/0x30 [ 30.997014] __kasan_slab_alloc+0x59/0x70 [ 30.997537] kmem_cache_alloc+0x16b/0x370 [ 30.998068] vm_area_dup+0x20/0x160 [ 30.998537] __split_vma+0x170/0x950 [ 30.999005] split_vma+0xc6/0x110 [ 30.999457] mprotect_fixup+0x8d2/0xb30 [ 30.999976] do_mprotect_pkey+0x87e/0xd40 [ 31.000512] __x64_sys_mprotect+0x78/0xc0 [ 31.001048] do_syscall_64+0x3f/0x90 [ 31.001525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.002216] [ 31.002438] Freed by task 213: [ 31.002848] kasan_save_stack+0x22/0x50 [ 31.003374] kasan_set_track+0x25/0x30 [ 31.003903] kasan_save_free_info+0x2b/0x50 [ 31.004459] __kasan_slab_free+0x10a/0x190 [ 31.005016] kmem_cache_free+0x10d/0x4d0 [ 31.005565] rcu_core+0x8c8/0x2860 [ 31.006053] __do_softirq+0x1b7/0x7d4 [ 31.006548] [ 31.006780] Last potentially related work creation: [ 31.007405] kasan_save_stack+0x22/0x50 [ 31.007934] __kasan_record_aux_stack+0x8e/0xa0 [ 31.008549] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.009226] remove_vma+0x139/0x170 [ 31.009709] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.010289] do_vmi_munmap+0x1f1/0x2b0 [ 31.010801] __vm_munmap+0x138/0x3a0 [ 31.011284] __x64_sys_munmap+0x59/0x80 [ 31.011818] do_syscall_64+0x3f/0x90 [ 31.012317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.012991] [ 31.013218] The buggy address belongs to the object at ffff88800f7282b8 [ 31.013218] which belongs to the cache vm_area_struct of size 168 [ 31.014742] The buggy address is located 88 bytes inside of [ 31.014742] freed 168-byte region [ffff88800f7282b8, ffff88800f728360) [ 31.016222] [ 31.016447] The buggy address belongs to the physical page: [ 31.017110] page:000000005fdb367a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf728 [ 31.018234] memcg:ffff88800fe8b101 [ 31.018662] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.019314] page_type: 0xffffffff() [ 31.019778] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.020710] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe8b101 [ 31.021633] page dumped because: kasan: bad access detected [ 31.022322] [ 31.022543] Memory state around the buggy address: [ 31.023130] ffff88800f728200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.024008] ffff88800f728280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.024886] >ffff88800f728300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.025765] ^ [ 31.026252] ffff88800f728380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.027131] ffff88800f728400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.028002] ================================================================== [ 31.029046] Disabling lock debugging due to kernel taint [ 33.021890] BUG: Bad rss-counter state mm:00000000328ae4c8 type:MM_FILEPAGES val:33 [ 33.023021] BUG: Bad rss-counter state mm:00000000328ae4c8 type:MM_ANONPAGES val:22 [ 33.400510] BUG: Bad rss-counter state mm:0000000050b17b01 type:MM_FILEPAGES val:33 [ 33.401780] BUG: Bad rss-counter state mm:0000000050b17b01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51108' (ECDSA) to the list of known hosts. 2023/06/20 19:20:42 fuzzer started 2023/06/20 19:20:42 dialing manager at localhost:36067 2023/06/20 19:20:42 checking machine... 2023/06/20 19:20:42 checking revisions... [ 34.177656] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:20:42 testing simple program... [ 34.227115] cgroup: Unknown subsys name 'net' [ 34.281218] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:20:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a70 RCX=0000000000000001 RDX=1ffff1100d9c134f RSI=ffff888019dcf5e0 RDI=ffff88806ce09a78 RBP=ffff888019dcf5e0 RSP=ffff88806ce099c8 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88806ce09ab8 R14=ffff888019dcf5e0 R15=ffff88806ce09a70 RIP=ffffffff81130445 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 00007f7be913f700 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=00007f3c44ab80b0 CR3=000000000e004000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732031343a3032 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363535 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8450cc7e RDX=dffffc0000000000 RSI=ffffffff8450cc7f RDI=ffff888016207520 RBP=ffff888016207578 RSP=ffff8880162074b0 R8 =0000000000000001 R9 =ffff888016207560 R10=0000000000038001 R11=000000000008abe0 R12=ffff888016207580 R13=ffff888016207568 R14=ffff888016207561 R15=ffff888016207520 RIP=ffffffff81130719 RFL=00000286 [--S--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 00007f3c44500900 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=00007f3c44ab7618 CR3=0000000016b00000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000