syzkaller login: [ 30.809667] BUG: Bad rss-counter state mm:00000000fa6e1b71 type:MM_FILEPAGES val:33 [ 30.810382] BUG: Bad rss-counter state mm:00000000fa6e1b71 type:MM_ANONPAGES val:22 [ 30.932889] ================================================================== [ 30.933512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.934106] Read of size 8 at addr ffff88800ca00798 by task sshd/220 [ 30.934582] [ 30.934783] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.935327] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.935938] Call Trace: [ 30.936137] [ 30.936321] dump_stack_lvl+0x91/0xf0 [ 30.936642] print_report+0xcc/0x620 [ 30.936946] ? __virt_addr_valid+0x102/0x340 [ 30.937270] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937860] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.938241] kasan_report+0xbe/0xf0 [ 30.938547] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.938974] vma_interval_tree_remove+0xc75/0xec0 [ 30.939364] vma_prepare+0xc54/0x11a0 [ 30.939688] __split_vma+0x5af/0x950 [ 30.939990] ? __pfx___split_vma+0x10/0x10 [ 30.940326] ? find_held_lock+0x2c/0x110 [ 30.940659] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.941019] ? lock_is_held_type+0x9f/0x120 [ 30.941371] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.941782] ? mtree_range_walk+0x632/0x900 [ 30.942136] ? mas_walk+0x5c7/0x7c0 [ 30.942446] do_vmi_munmap+0x1f1/0x2b0 [ 30.942795] mmap_region+0x1f9/0x2660 [ 30.943118] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.943454] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.943914] ? __pfx_lock_acquire+0x10/0x10 [ 30.944248] ? __pfx_mmap_region+0x10/0x10 [ 30.944608] ? security_mmap_addr+0x7d/0xa0 [ 30.944957] ? get_unmapped_area+0x1f5/0x3f0 [ 30.945308] do_mmap+0x854/0xf00 [ 30.945607] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.945926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.946275] ksys_mmap_pgoff+0x3af/0x500 [ 30.946601] do_syscall_64+0x3f/0x90 [ 30.946954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.947368] RIP: 0033:0x7ff5698b8d82 [ 30.947667] 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 [ 30.949046] RSP: 002b:00007ffce2e0f838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.949627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5698b8d82 [ 30.950161] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff568cf2000 [ 30.950724] RBP: 00007ff568cf2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.951265] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617dbc36ec0 [ 30.951843] R13: 00007ffce2e0f850 R14: 00007ffce2e0f880 R15: 00007ffce2e0fbe0 [ 30.952393] [ 30.952608] [ 30.952744] Allocated by task 213: [ 30.953021] kasan_save_stack+0x22/0x50 [ 30.953348] kasan_set_track+0x25/0x30 [ 30.953660] __kasan_slab_alloc+0x59/0x70 [ 30.954002] kmem_cache_alloc+0x16b/0x370 [ 30.954357] vm_area_dup+0x20/0x160 [ 30.954716] __split_vma+0x170/0x950 [ 30.955029] split_vma+0xc6/0x110 [ 30.955307] mprotect_fixup+0x8d2/0xb30 [ 30.955651] do_mprotect_pkey+0x87e/0xd40 [ 30.955979] __x64_sys_mprotect+0x78/0xc0 [ 30.956308] do_syscall_64+0x3f/0x90 [ 30.956618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.957023] [ 30.957158] Freed by task 203: [ 30.957406] kasan_save_stack+0x22/0x50 [ 30.957719] kasan_set_track+0x25/0x30 [ 30.958029] kasan_save_free_info+0x2b/0x50 [ 30.958372] __kasan_slab_free+0x10a/0x190 [ 30.958768] kmem_cache_free+0x10d/0x4d0 [ 30.959093] rcu_core+0x8c8/0x2860 [ 30.959378] __do_softirq+0x1b7/0x7d4 [ 30.959710] [ 30.959847] Last potentially related work creation: [ 30.960223] kasan_save_stack+0x22/0x50 [ 30.960565] __kasan_record_aux_stack+0x8e/0xa0 [ 30.960965] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.961403] remove_vma+0x139/0x170 [ 30.961753] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.962135] do_vmi_munmap+0x1f1/0x2b0 [ 30.962482] __vm_munmap+0x138/0x3a0 [ 30.962847] __x64_sys_munmap+0x59/0x80 [ 30.963188] do_syscall_64+0x3f/0x90 [ 30.963519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.963954] [ 30.964100] The buggy address belongs to the object at ffff88800ca00740 [ 30.964100] which belongs to the cache vm_area_struct of size 168 [ 30.965149] The buggy address is located 88 bytes inside of [ 30.965149] freed 168-byte region [ffff88800ca00740, ffff88800ca007e8) [ 30.966102] [ 30.966254] The buggy address belongs to the physical page: [ 30.966752] page:00000000290617d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca00 [ 30.967493] memcg:ffff88800cc9b401 [ 30.967784] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.968268] page_type: 0xffffffff() [ 30.968584] raw: 0100000000000200 ffff8880087a0c80 ffffea000038a800 dead000000000007 [ 30.969206] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc9b401 [ 30.969822] page dumped because: kasan: bad access detected [ 30.970276] [ 30.970428] Memory state around the buggy address: [ 30.970870] ffff88800ca00680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.971460] ffff88800ca00700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.972057] >ffff88800ca00780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.972646] ^ [ 30.972992] ffff88800ca00800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.973578] ffff88800ca00880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.974166] ================================================================== [ 30.974949] Disabling lock debugging due to kernel taint [ 32.344509] BUG: Bad rss-counter state mm:00000000731fc883 type:MM_FILEPAGES val:33 [ 32.345218] BUG: Bad rss-counter state mm:00000000731fc883 type:MM_ANONPAGES val:22 [ 32.727961] BUG: Bad rss-counter state mm:00000000adcebfca type:MM_FILEPAGES val:33 [ 32.728637] BUG: Bad rss-counter state mm:00000000adcebfca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10426' (ECDSA) to the list of known hosts. 2023/06/21 09:26:45 fuzzer started 2023/06/21 09:26:45 dialing manager at localhost:36067 2023/06/21 09:26:45 checking machine... 2023/06/21 09:26:45 checking revisions... [ 33.304409] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:26:45 testing simple program... [ 33.335044] cgroup: Unknown subsys name 'net' [ 33.367162] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:26:45 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff864bd7ec RDX=0000000000000008 RSI=ffffffff85407f00 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bd7f0 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407f08 R15=ffff88806ce09a98 RIP=ffffffff81131023 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=00007f9599a8faf0 CR3=000000000d592000 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=e06e67472a020dbc074f2a0d6752b594 XMM02=2c67c8bc2e329bc3000000000011b248 XMM03=fb795ef6d65770560000000000121fb8 XMM04=4d1c1646d29b34c600000000000ae988 XMM05=19e9129bd510f2350000000000131b58 XMM06=091673a48146b7990000000000130d30 XMM07=e042d86d42eb936e0000000000122290 XMM08=de12b6e3d80e7710000000000011b2a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016093680 RSI=ffffffff813c021a RDI=0000000000000005 RBP=00000007969331c0 RSP=ffff88806cf09e40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=ffff88806cf2c250 R13=ffff88806cf2b940 R14=ffff88806cf2b9c0 R15=dffffc0000000000 RIP=ffffffff814c0864 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 00007efe7a647900 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=00007efe7a611008 CR3=000000000ec44000 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