syzkaller login: [ 31.178773] BUG: Bad rss-counter state mm:000000007a9488f2 type:MM_FILEPAGES val:33 [ 31.179998] BUG: Bad rss-counter state mm:000000007a9488f2 type:MM_ANONPAGES val:22 [ 31.219079] ================================================================== [ 31.220098] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.221095] Read of size 8 at addr ffff88800c5c06b0 by task sshd/219 [ 31.221949] [ 31.222178] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.223118] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.224145] Call Trace: [ 31.224489] [ 31.224793] dump_stack_lvl+0x91/0xf0 [ 31.225314] print_report+0xcc/0x620 [ 31.225828] ? __virt_addr_valid+0x102/0x340 [ 31.226430] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.227091] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.227738] kasan_report+0xbe/0xf0 [ 31.228246] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.228912] vma_interval_tree_remove+0xc75/0xec0 [ 31.229562] vma_prepare+0xc54/0x11a0 [ 31.230075] __split_vma+0x5af/0x950 [ 31.230585] ? __pfx___split_vma+0x10/0x10 [ 31.231158] ? find_held_lock+0x2c/0x110 [ 31.231711] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.232322] ? lock_is_held_type+0x9f/0x120 [ 31.232908] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.233557] ? mtree_range_walk+0x632/0x900 [ 31.234151] ? mas_walk+0x5c7/0x7c0 [ 31.234667] do_vmi_munmap+0x1f1/0x2b0 [ 31.235187] mmap_region+0x1f9/0x2660 [ 31.235702] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.236262] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.237021] ? __pfx_lock_acquire+0x10/0x10 [ 31.237586] ? __pfx_mmap_region+0x10/0x10 [ 31.238154] ? security_mmap_addr+0x7d/0xa0 [ 31.238742] ? get_unmapped_area+0x1f5/0x3f0 [ 31.239338] do_mmap+0x854/0xf00 [ 31.239805] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.240340] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.240934] ksys_mmap_pgoff+0x3af/0x500 [ 31.241471] do_syscall_64+0x3f/0x90 [ 31.241985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.242689] RIP: 0033:0x7fb93c83dd82 [ 31.243179] 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 [ 31.245435] RSP: 002b:00007fffdabbc3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.246438] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb93c83dd82 [ 31.247337] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb93bc77000 [ 31.248249] RBP: 00007fb93bc77000 R08: 0000000000000009 R09: 0000000000001000 [ 31.249165] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a1ffadec0 [ 31.250072] R13: 00007fffdabbc3e0 R14: 00007fffdabbc410 R15: 00007fffdabbc770 [ 31.250989] [ 31.251304] [ 31.251538] Allocated by task 212: [ 31.251998] kasan_save_stack+0x22/0x50 [ 31.252537] kasan_set_track+0x25/0x30 [ 31.253065] __kasan_slab_alloc+0x59/0x70 [ 31.253620] kmem_cache_alloc+0x16b/0x370 [ 31.254172] vm_area_dup+0x20/0x160 [ 31.254672] __split_vma+0x170/0x950 [ 31.255168] split_vma+0xc6/0x110 [ 31.255638] mprotect_fixup+0x8d2/0xb30 [ 31.256176] do_mprotect_pkey+0x87e/0xd40 [ 31.256730] __x64_sys_mprotect+0x78/0xc0 [ 31.257282] do_syscall_64+0x3f/0x90 [ 31.257786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.258472] [ 31.258704] Freed by task 212: [ 31.259123] kasan_save_stack+0x22/0x50 [ 31.259665] kasan_set_track+0x25/0x30 [ 31.260192] kasan_save_free_info+0x2b/0x50 [ 31.260754] __kasan_slab_free+0x10a/0x190 [ 31.261321] kmem_cache_free+0x10d/0x4d0 [ 31.261859] rcu_core+0x8c8/0x2860 [ 31.262336] __do_softirq+0x1b7/0x7d4 [ 31.262875] [ 31.263110] Last potentially related work creation: [ 31.263730] kasan_save_stack+0x22/0x50 [ 31.264273] __kasan_record_aux_stack+0x8e/0xa0 [ 31.264888] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.265575] remove_vma+0x139/0x170 [ 31.266054] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.266656] do_vmi_munmap+0x1f1/0x2b0 [ 31.267182] __vm_munmap+0x138/0x3a0 [ 31.267686] __x64_sys_munmap+0x59/0x80 [ 31.268215] do_syscall_64+0x3f/0x90 [ 31.268726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269418] [ 31.269652] Second to last potentially related work creation: [ 31.270392] kasan_save_stack+0x22/0x50 [ 31.270938] __kasan_record_aux_stack+0x8e/0xa0 [ 31.271551] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.272240] remove_vma+0x139/0x170 [ 31.272729] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.273327] do_vmi_munmap+0x1f1/0x2b0 [ 31.273850] mmap_region+0x1f9/0x2660 [ 31.274539] do_mmap+0x854/0xf00 [ 31.275130] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.275804] ksys_mmap_pgoff+0x3af/0x500 [ 31.276493] do_syscall_64+0x3f/0x90 [ 31.277129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.278019] [ 31.278313] The buggy address belongs to the object at ffff88800c5c0658 [ 31.278313] which belongs to the cache vm_area_struct of size 168 [ 31.280349] The buggy address is located 88 bytes inside of [ 31.280349] freed 168-byte region [ffff88800c5c0658, ffff88800c5c0700) [ 31.282267] [ 31.282508] The buggy address belongs to the physical page: [ 31.283403] page:0000000050881312 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5c0 [ 31.284666] memcg:ffff88800e551601 [ 31.285120] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.285866] page_type: 0xffffffff() [ 31.286358] raw: 0100000000000200 ffff8880087a0c80 ffffea0000329500 dead000000000005 [ 31.287368] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e551601 [ 31.288350] page dumped because: kasan: bad access detected [ 31.289053] [ 31.289286] Memory state around the buggy address: [ 31.289902] ffff88800c5c0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.290817] ffff88800c5c0600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.291734] >ffff88800c5c0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.292635] ^ [ 31.293258] ffff88800c5c0700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.294175] ffff88800c5c0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.295121] ================================================================== [ 31.296431] Disabling lock debugging due to kernel taint [ 33.205175] BUG: Bad rss-counter state mm:00000000c4f9ded3 type:MM_FILEPAGES val:33 [ 33.206186] BUG: Bad rss-counter state mm:00000000c4f9ded3 type:MM_ANONPAGES val:22 [ 33.669160] BUG: Bad rss-counter state mm:000000008462aa07 type:MM_FILEPAGES val:33 [ 33.670142] BUG: Bad rss-counter state mm:000000008462aa07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56137' (ECDSA) to the list of known hosts. 2023/06/20 18:40:12 fuzzer started 2023/06/20 18:40:12 dialing manager at localhost:36067 2023/06/20 18:40:12 checking machine... 2023/06/20 18:40:12 checking revisions... [ 34.382731] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:40:13 testing simple program... [ 34.430026] cgroup: Unknown subsys name 'net' [ 34.478472] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:40:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801655e200 RCX=ffff8880084c6140 RDX=ffffea0000595780 RSI=ffff88801655ec00 RDI=ffff8880084c6140 RBP=0000000000000000 RSP=ffff88800d9b7628 R8 =ffff88801655e000 R9 =0000000000000000 R10=ffffea0000595780 R11=000000008010000a R12=dffffc0000000000 R13=ffff88800d9b7668 R14=ffff8880084c6140 R15=ffff88801655ec00 RIP=ffffffff81810316 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 00007f1b754a0900 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=00007f1b748f8cd0 CR3=000000000c794000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=cf95abdd0ef2c83a00000000000ae988 XMM05=427d09d106641e2c0000000000134ff8 XMM06=ccded5ba18c3dce000000000001340a0 XMM07=fb795ef6d65770560000000000122fa0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800d670000 RBX=ffff88800d66f430 RCX=0000000000000001 RDX=ffff88800d66f438 RSI=ffff88800d66f420 RDI=ffff88800d66f398 RBP=ffff88800d668000 RSP=ffff88800d66f2c8 R8 =0000000000000001 R9 =ffff88800d66f3c8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800d66f3e8 R13=ffff88800d66f3d0 R14=ffff88800d66f420 R15=ffff88800d66f388 RIP=ffffffff81131296 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc896de8900 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=00007fff6bfb0000 CR3=0000000016914000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000