syzkaller login: [ 70.034134] BUG: Bad rss-counter state mm:000000003c4495d7 type:MM_FILEPAGES val:33 [ 70.034825] BUG: Bad rss-counter state mm:000000003c4495d7 type:MM_ANONPAGES val:22 [ 70.235861] ================================================================== [ 70.236441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.237039] Read of size 8 at addr ffff888017d56df0 by task sshd/221 [ 70.237551] [ 70.237702] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.238360] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.238978] Call Trace: [ 70.239189] [ 70.239371] dump_stack_lvl+0x91/0xf0 [ 70.239691] print_report+0xcc/0x620 [ 70.240011] ? __virt_addr_valid+0x102/0x340 [ 70.240367] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.240764] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.241170] kasan_report+0xbe/0xf0 [ 70.241501] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.241904] vma_interval_tree_remove+0xc75/0xec0 [ 70.242293] vma_prepare+0xc54/0x11a0 [ 70.242608] __split_vma+0x5af/0x950 [ 70.242915] ? __pfx___split_vma+0x10/0x10 [ 70.243261] ? find_held_lock+0x2c/0x110 [ 70.243601] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.243969] ? lock_is_held_type+0x9f/0x120 [ 70.244321] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.244716] ? mtree_range_walk+0x632/0x900 [ 70.245107] ? mas_walk+0x5c7/0x7c0 [ 70.245420] do_vmi_munmap+0x1f1/0x2b0 [ 70.245783] mmap_region+0x1f9/0x2660 [ 70.246156] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.246493] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.246953] ? __pfx_lock_acquire+0x10/0x10 [ 70.247299] ? __pfx_mmap_region+0x10/0x10 [ 70.247645] ? security_mmap_addr+0x7d/0xa0 [ 70.247989] ? get_unmapped_area+0x1f5/0x3f0 [ 70.248348] do_mmap+0x854/0xf00 [ 70.248636] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.248962] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.249327] ksys_mmap_pgoff+0x3af/0x500 [ 70.249688] do_syscall_64+0x3f/0x90 [ 70.250002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.250423] RIP: 0033:0x7f6c50d43d82 [ 70.250719] 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 [ 70.252035] RSP: 002b:00007fff85390f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.252616] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c50d43d82 [ 70.253158] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c5017d000 [ 70.253872] RBP: 00007f6c5017d000 R08: 0000000000000009 R09: 0000000000001000 [ 70.254416] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db1ad0fd90 [ 70.254959] R13: 00007fff85390f70 R14: 00007fff85390fa0 R15: 00007fff85391300 [ 70.255507] [ 70.255702] [ 70.255844] Allocated by task 211: [ 70.256122] kasan_save_stack+0x22/0x50 [ 70.256452] kasan_set_track+0x25/0x30 [ 70.256773] __kasan_slab_alloc+0x59/0x70 [ 70.257114] kmem_cache_alloc+0x16b/0x370 [ 70.257458] vm_area_dup+0x20/0x160 [ 70.258113] __split_vma+0x170/0x950 [ 70.258962] split_vma+0xc6/0x110 [ 70.259764] mprotect_fixup+0x8d2/0xb30 [ 70.260668] do_mprotect_pkey+0x87e/0xd40 [ 70.261625] __x64_sys_mprotect+0x78/0xc0 [ 70.262561] do_syscall_64+0x3f/0x90 [ 70.263288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.264291] [ 70.264602] Freed by task 13: [ 70.265198] kasan_save_stack+0x22/0x50 [ 70.266076] kasan_set_track+0x25/0x30 [ 70.266953] kasan_save_free_info+0x2b/0x50 [ 70.267932] __kasan_slab_free+0x10a/0x190 [ 70.268898] kmem_cache_free+0x10d/0x4d0 [ 70.269835] rcu_core+0x8c8/0x2860 [ 70.270629] __do_softirq+0x1b7/0x7d4 [ 70.271451] [ 70.271825] Last potentially related work creation: [ 70.272968] kasan_save_stack+0x22/0x50 [ 70.273914] __kasan_record_aux_stack+0x8e/0xa0 [ 70.274969] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.276153] remove_vma+0x139/0x170 [ 70.276974] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.278000] do_vmi_munmap+0x1f1/0x2b0 [ 70.278876] __vm_munmap+0x138/0x3a0 [ 70.279702] __x64_sys_munmap+0x59/0x80 [ 70.280578] do_syscall_64+0x3f/0x90 [ 70.281419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.282587] [ 70.282960] The buggy address belongs to the object at ffff888017d56d98 [ 70.282960] which belongs to the cache vm_area_struct of size 168 [ 70.285862] The buggy address is located 88 bytes inside of [ 70.285862] freed 168-byte region [ffff888017d56d98, ffff888017d56e40) [ 70.288525] [ 70.288892] The buggy address belongs to the physical page: [ 70.290146] page:00000000d6223182 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d56 [ 70.292233] memcg:ffff888017cff901 [ 70.292998] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.294217] page_type: 0xffffffff() [ 70.295029] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 70.296754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017cff901 [ 70.298547] page dumped because: kasan: bad access detected [ 70.299797] [ 70.300167] Memory state around the buggy address: [ 70.301255] ffff888017d56c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 70.302827] ffff888017d56d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 70.304431] >ffff888017d56d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 70.306045] ^ [ 70.307581] ffff888017d56e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 70.309224] ffff888017d56e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.310836] ================================================================== [ 70.313004] Disabling lock debugging due to kernel taint [ 75.097744] BUG: Bad rss-counter state mm:00000000f5a16c6b type:MM_FILEPAGES val:33 [ 75.098385] BUG: Bad rss-counter state mm:00000000f5a16c6b type:MM_ANONPAGES val:22 [ 76.289616] BUG: Bad rss-counter state mm:0000000011c67e31 type:MM_FILEPAGES val:33 [ 76.294219] BUG: Bad rss-counter state mm:0000000011c67e31 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24199' (ECDSA) to the list of known hosts. 2023/06/20 08:08:40 fuzzer started 2023/06/20 08:08:40 dialing manager at localhost:44161 2023/06/20 08:08:40 checking machine... 2023/06/20 08:08:40 checking revisions... [ 77.153608] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:08:40 testing simple program... [ 77.207097] cgroup: Unknown subsys name 'net' [ 77.281995] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:08:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880144af5b0 RCX=0000000000000001 RDX=1ffff11002895ec7 RSI=ffffffff81807ebb RDI=ffff8880144af5bc RBP=ffff8880144af638 RSP=ffff8880144af4c8 R8 =0000000000000001 R9 =ffff8880144af528 R10=0000000000038001 R11=0000000000020de7 R12=ffff8880144af5b0 R13=0000000000000000 R14=ffff88800fd551c0 R15=0000000000092cc0 RIP=ffffffff813ad4f7 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 00007fa6358bd900 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=00007f5f94f360f8 CR3=00000000147c6000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888018562c0c RCX=0000000000000000 RDX=ffff88800dd38000 RSI=ffffffff844b278a RDI=ffff88800d537990 RBP=ffff88800d537990 RSP=ffff88800d537890 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffffffffffff R13=00007fa635f58000 R14=ffff88800d5379a8 R15=00007fa635f58000 RIP=ffffffff814c07e4 RFL=00000282 [--S----] 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 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=00007fa635ced790 CR3=0000000016852000 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=0000000000000000fffffffe7ffbfeff XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000020000000000000000 XMM04=00000000000000008000000000000006 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000