syzkaller login: [ 68.730857] BUG: Bad rss-counter state mm:000000004dd35053 type:MM_FILEPAGES val:33 [ 68.732331] BUG: Bad rss-counter state mm:000000004dd35053 type:MM_ANONPAGES val:22 [ 68.881685] ================================================================== [ 68.882602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.883542] Read of size 8 at addr ffff8880161eb140 by task sshd/225 [ 68.884317] [ 68.884537] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 68.885573] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.886549] Call Trace: [ 68.886868] [ 68.887153] dump_stack_lvl+0x91/0xf0 [ 68.887641] print_report+0xcc/0x620 [ 68.888125] ? __virt_addr_valid+0x102/0x340 [ 68.888708] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.889325] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.889955] kasan_report+0xbe/0xf0 [ 68.890432] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.891058] vma_interval_tree_remove+0xc75/0xec0 [ 68.891671] vma_prepare+0xc54/0x11a0 [ 68.892151] __split_vma+0x5af/0x950 [ 68.892635] ? __pfx___split_vma+0x10/0x10 [ 68.893170] ? find_held_lock+0x2c/0x110 [ 68.893691] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.894261] ? lock_is_held_type+0x9f/0x120 [ 68.894799] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.895404] ? mtree_range_walk+0x632/0x900 [ 68.895960] ? mas_walk+0x5c7/0x7c0 [ 68.896441] do_vmi_munmap+0x1f1/0x2b0 [ 68.896940] mmap_region+0x1f9/0x2660 [ 68.897426] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.897936] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.898654] ? __pfx_lock_acquire+0x10/0x10 [ 68.899197] ? __pfx_mmap_region+0x10/0x10 [ 68.899733] ? security_mmap_addr+0x7d/0xa0 [ 68.900266] ? get_unmapped_area+0x1f5/0x3f0 [ 68.900844] do_mmap+0x854/0xf00 [ 68.901289] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.901790] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.902356] ksys_mmap_pgoff+0x3af/0x500 [ 68.902875] do_syscall_64+0x3f/0x90 [ 68.903357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.904003] RIP: 0033:0x7f8df269fd82 [ 68.904466] 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 [ 68.906616] RSP: 002b:00007ffcc7219ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.907527] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8df269fd82 [ 68.908390] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8df1ad9000 [ 68.909244] RBP: 00007f8df1ad9000 R08: 0000000000000009 R09: 0000000000001000 [ 68.910103] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad844d4b20 [ 68.910949] R13: 00007ffcc7219ad0 R14: 00007ffcc7219b00 R15: 00007ffcc7219e60 [ 68.911813] [ 68.912105] [ 68.912342] Allocated by task 217: [ 68.912776] kasan_save_stack+0x22/0x50 [ 68.913286] kasan_set_track+0x25/0x30 [ 68.913788] __kasan_slab_alloc+0x59/0x70 [ 68.914319] kmem_cache_alloc+0x16b/0x370 [ 68.914840] vm_area_dup+0x20/0x160 [ 68.915300] __split_vma+0x170/0x950 [ 68.915769] split_vma+0xc6/0x110 [ 68.916208] mprotect_fixup+0x8d2/0xb30 [ 68.916729] do_mprotect_pkey+0x87e/0xd40 [ 68.917253] __x64_sys_mprotect+0x78/0xc0 [ 68.917781] do_syscall_64+0x3f/0x90 [ 68.918256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.918903] [ 68.919117] Freed by task 203: [ 68.919511] kasan_save_stack+0x22/0x50 [ 68.920022] kasan_set_track+0x25/0x30 [ 68.920537] kasan_save_free_info+0x2b/0x50 [ 68.921069] __kasan_slab_free+0x10a/0x190 [ 68.921607] kmem_cache_free+0x10d/0x4d0 [ 68.922114] rcu_core+0x8c8/0x2860 [ 68.922565] __do_softirq+0x1b7/0x7d4 [ 68.923047] [ 68.923264] Last potentially related work creation: [ 68.923849] kasan_save_stack+0x22/0x50 [ 68.924361] __kasan_record_aux_stack+0x8e/0xa0 [ 68.924938] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.925586] remove_vma+0x139/0x170 [ 68.926104] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.926668] do_vmi_munmap+0x1f1/0x2b0 [ 68.927154] __vm_munmap+0x138/0x3a0 [ 68.927626] __x64_sys_munmap+0x59/0x80 [ 68.928124] do_syscall_64+0x3f/0x90 [ 68.928624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.929265] [ 68.929486] The buggy address belongs to the object at ffff8880161eb0e8 [ 68.929486] which belongs to the cache vm_area_struct of size 168 [ 68.930979] The buggy address is located 88 bytes inside of [ 68.930979] freed 168-byte region [ffff8880161eb0e8, ffff8880161eb190) [ 68.932411] [ 68.932631] The buggy address belongs to the physical page: [ 68.933295] page:00000000fe4815ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x161eb [ 68.934394] memcg:ffff888018303001 [ 68.934821] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.935474] page_type: 0xffffffff() [ 68.935927] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 68.936861] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018303001 [ 68.937771] page dumped because: kasan: bad access detected [ 68.938437] [ 68.938652] Memory state around the buggy address: [ 68.939235] ffff8880161eb000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.940096] ffff8880161eb080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 68.940980] >ffff8880161eb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.941837] ^ [ 68.942481] ffff8880161eb180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 68.943342] ffff8880161eb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 68.944195] ================================================================== [ 68.945127] Disabling lock debugging due to kernel taint [ 71.525936] BUG: Bad rss-counter state mm:000000005432f9e9 type:MM_FILEPAGES val:33 [ 71.526940] BUG: Bad rss-counter state mm:000000005432f9e9 type:MM_ANONPAGES val:22 [ 72.073499] BUG: Bad rss-counter state mm:000000007b95cf85 type:MM_FILEPAGES val:33 [ 72.074682] BUG: Bad rss-counter state mm:000000007b95cf85 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13310' (ECDSA) to the list of known hosts. 2023/06/19 12:37:53 fuzzer started 2023/06/19 12:37:53 dialing manager at localhost:44161 2023/06/19 12:37:53 checking machine... 2023/06/19 12:37:53 checking revisions... [ 72.729536] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:37:54 testing simple program... [ 72.775498] cgroup: Unknown subsys name 'net' [ 72.824130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:37:51 Registers: info registers vcpu 0 RAX=ffffffff81b4d865 RBX=0000000000000009 RCX=0000000000000001 RDX=0000000000408d40 RSI=0000000000000010 RDI=ffff88801582f7b8 RBP=dffffc0000000000 RSP=ffff88801582f6e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=0000000000000010 R13=0000000000408d40 R14=ffff88801582f770 R15=0000000000408d40 RIP=ffffffff813ad5d5 RFL=00000287 [--S--PC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3e22f7c900 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=00007f3e2249d000 CR3=000000000c53a000 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=d3fdd5f48436fbd700000000000aead0 XMM01=8cdec34d38af4c0a00000000000f9e40 XMM02=693bd129e125714a00000000000fa180 XMM03=5e5c10884646930b00000000000fb728 XMM04=3e888df9b149665f00000000000ae988 XMM05=2c8302a28d6450a50000000000135e98 XMM06=6860aeb314f8829d0000000000134d50 XMM07=fb795ef6d65770560000000000124ba0 XMM08=2c67c8bc2e329bc3000000000011daf0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff816cae36 RBX=ffffffff85ded21c RCX=ffffffff816cae55 RDX=0000000000000000 RSI=ffffffff86120126 RDI=ffffffff85ded210 RBP=ffffffff85ded220 RSP=ffff88800fcbf730 R8 =ffffffff86120126 R9 =ffff88800fcbf828 R10=0000000000038001 R11=000000000001cf8f R12=ffffffff85ded228 R13=ffffffff85ded210 R14=ffffffff85ded21c R15=dffffc0000000000 RIP=ffffffff8112fc55 RFL=00000202 [-------] 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 00007f8b0be8d900 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=00007fff9b25c000 CR3=0000000014750000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000