syzkaller login: [ 31.037613] BUG: Bad rss-counter state mm:000000000f611d84 type:MM_FILEPAGES val:33 [ 31.038511] BUG: Bad rss-counter state mm:000000000f611d84 type:MM_ANONPAGES val:22 [ 31.242719] ================================================================== [ 31.244452] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.249949] Read of size 8 at addr ffff88800e3533f8 by task sshd/220 [ 31.251461] [ 31.251849] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.252685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.254309] Call Trace: [ 31.254977] [ 31.255589] dump_stack_lvl+0x91/0xf0 [ 31.256649] print_report+0xcc/0x620 [ 31.257685] ? __virt_addr_valid+0x102/0x340 [ 31.258864] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260247] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.261629] kasan_report+0xbe/0xf0 [ 31.262616] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263936] vma_interval_tree_remove+0xc75/0xec0 [ 31.265212] vma_prepare+0xc54/0x11a0 [ 31.266226] __split_vma+0x5af/0x950 [ 31.267204] ? __pfx___split_vma+0x10/0x10 [ 31.268320] ? find_held_lock+0x2c/0x110 [ 31.269410] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.270597] ? lock_is_held_type+0x9f/0x120 [ 31.271722] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.272994] ? mtree_range_walk+0x632/0x900 [ 31.281648] ? mas_walk+0x5c7/0x7c0 [ 31.281961] do_vmi_munmap+0x1f1/0x2b0 [ 31.282281] mmap_region+0x1f9/0x2660 [ 31.282594] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.282920] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.283384] ? __pfx_lock_acquire+0x10/0x10 [ 31.283728] ? __pfx_mmap_region+0x10/0x10 [ 31.284070] ? security_mmap_addr+0x7d/0xa0 [ 31.284414] ? get_unmapped_area+0x1f5/0x3f0 [ 31.284764] do_mmap+0x854/0xf00 [ 31.285047] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.285400] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.285767] ksys_mmap_pgoff+0x3af/0x500 [ 31.286096] do_syscall_64+0x3f/0x90 [ 31.286409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.286822] RIP: 0033:0x7f16c387ad82 [ 31.287115] 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 [ 31.288476] RSP: 002b:00007ffe2ee12358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.289052] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16c387ad82 [ 31.289619] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16c2cb4000 [ 31.290161] RBP: 00007f16c2cb4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.290703] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564217d6dec0 [ 31.291239] R13: 00007ffe2ee12370 R14: 00007ffe2ee123a0 R15: 00007ffe2ee12700 [ 31.291799] [ 31.291988] [ 31.292127] Allocated by task 213: [ 31.292402] kasan_save_stack+0x22/0x50 [ 31.292730] kasan_set_track+0x25/0x30 [ 31.293050] __kasan_slab_alloc+0x59/0x70 [ 31.293410] kmem_cache_alloc+0x16b/0x370 [ 31.293743] vm_area_dup+0x20/0x160 [ 31.294036] __split_vma+0x170/0x950 [ 31.294333] split_vma+0xc6/0x110 [ 31.294622] mprotect_fixup+0x8d2/0xb30 [ 31.294946] do_mprotect_pkey+0x87e/0xd40 [ 31.295285] __x64_sys_mprotect+0x78/0xc0 [ 31.296169] do_syscall_64+0x3f/0x90 [ 31.296998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298154] [ 31.298519] Freed by task 13: [ 31.299194] kasan_save_stack+0x22/0x50 [ 31.300072] kasan_set_track+0x25/0x30 [ 31.300934] kasan_save_free_info+0x2b/0x50 [ 31.301965] __kasan_slab_free+0x10a/0x190 [ 31.302900] kmem_cache_free+0x10d/0x4d0 [ 31.303797] rcu_core+0x8c8/0x2860 [ 31.304587] __do_softirq+0x1b7/0x7d4 [ 31.305433] [ 31.305794] Last potentially related work creation: [ 31.306868] kasan_save_stack+0x22/0x50 [ 31.307743] __kasan_record_aux_stack+0x8e/0xa0 [ 31.308760] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.309919] remove_vma+0x139/0x170 [ 31.310718] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.311771] do_vmi_munmap+0x1f1/0x2b0 [ 31.312723] __vm_munmap+0x138/0x3a0 [ 31.313630] __x64_sys_munmap+0x59/0x80 [ 31.314585] do_syscall_64+0x3f/0x90 [ 31.315492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.316773] [ 31.317154] Second to last potentially related work creation: [ 31.318532] kasan_save_stack+0x22/0x50 [ 31.319486] __kasan_record_aux_stack+0x8e/0xa0 [ 31.320635] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.321948] remove_vma+0x139/0x170 [ 31.322809] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.323891] do_vmi_munmap+0x1f1/0x2b0 [ 31.324824] mmap_region+0x1f9/0x2660 [ 31.325755] do_mmap+0x854/0xf00 [ 31.326564] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.327492] ksys_mmap_pgoff+0x3af/0x500 [ 31.328387] do_syscall_64+0x3f/0x90 [ 31.329219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.330387] [ 31.330747] The buggy address belongs to the object at ffff88800e3533a0 [ 31.330747] which belongs to the cache vm_area_struct of size 168 [ 31.333602] The buggy address is located 88 bytes inside of [ 31.333602] freed 168-byte region [ffff88800e3533a0, ffff88800e353448) [ 31.336312] [ 31.336711] The buggy address belongs to the physical page: [ 31.337974] page:00000000d7937f30 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe353 [ 31.339982] memcg:ffff88800d73ae01 [ 31.340744] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.341946] page_type: 0xffffffff() [ 31.342737] raw: 0100000000000200 ffff8880087a0c80 ffffea000038a540 dead000000000002 [ 31.344612] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d73ae01 [ 31.346306] page dumped because: kasan: bad access detected [ 31.347521] [ 31.347874] Memory state around the buggy address: [ 31.348923] ffff88800e353280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.350502] ffff88800e353300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.352059] >ffff88800e353380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.353641] ^ [ 31.355185] ffff88800e353400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.356763] ffff88800e353480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.358352] ================================================================== [ 31.360201] Disabling lock debugging due to kernel taint [ 34.191922] BUG: Bad rss-counter state mm:00000000022bb4bd type:MM_FILEPAGES val:33 [ 34.192564] BUG: Bad rss-counter state mm:00000000022bb4bd type:MM_ANONPAGES val:22 [ 35.720345] BUG: Bad rss-counter state mm:00000000bb9720e4 type:MM_FILEPAGES val:33 [ 35.721031] BUG: Bad rss-counter state mm:00000000bb9720e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43920' (ECDSA) to the list of known hosts. 2023/06/21 09:56:44 fuzzer started 2023/06/21 09:56:44 dialing manager at localhost:36067 2023/06/21 09:56:44 checking machine... 2023/06/21 09:56:44 checking revisions... [ 36.528713] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:56:45 testing simple program... [ 36.593981] cgroup: Unknown subsys name 'net' [ 36.652115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:56:44 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=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=00007faa4b61c0e0 CR3=0000000010032000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=485d7b640d082dae0000000000133f80 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=2c5eaa6085146dbb00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8171897f RDX=0000000000007189 RSI=0000000000007189 RDI=ffffffff86506014 RBP=ffff88800d60f5b0 RSP=ffff88800d60f4e8 R8 =0000000000000000 R9 =ffff88800d60f598 R10=0000000000038001 R11=000000000001dd8c R12=ffff88800d60f5b8 R13=ffff88800d60f5a0 R14=ffff88800d60f599 R15=ffff88800d60f558 RIP=ffffffff8113077a 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 00007f8d75be9900 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=00007f8d76019790 CR3=000000000e282000 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=0000000000000018fffffffe7ffbfeff XMM01=9c043b44e8be68ff000055d600000030 XMM02=9c043b44e8be68ff90ee35e3fc430a68 XMM03=000000000000000291ee35e3fc430a68 XMM04=00000000000000008000000000000006 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=1e7ea6d8a55308f90000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000