syzkaller login: [ 35.982773] BUG: Bad rss-counter state mm:00000000f1629387 type:MM_FILEPAGES val:33 [ 35.984294] BUG: Bad rss-counter state mm:00000000f1629387 type:MM_ANONPAGES val:22 [ 36.222883] ================================================================== [ 36.223844] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.224818] Read of size 8 at addr ffff888016516a50 by task sshd/219 [ 36.225630] [ 36.225857] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.226774] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.227781] Call Trace: [ 36.228116] [ 36.228416] dump_stack_lvl+0x91/0xf0 [ 36.228932] print_report+0xcc/0x620 [ 36.229432] ? __virt_addr_valid+0x102/0x340 [ 36.230011] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.230662] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.231299] kasan_report+0xbe/0xf0 [ 36.231793] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.232446] vma_interval_tree_remove+0xc75/0xec0 [ 36.233095] vma_prepare+0xc54/0x11a0 [ 36.233608] __split_vma+0x5af/0x950 [ 36.234115] ? __pfx___split_vma+0x10/0x10 [ 36.234684] ? find_held_lock+0x2c/0x110 [ 36.235243] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.235843] ? lock_is_held_type+0x9f/0x120 [ 36.236425] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.237080] ? mtree_range_walk+0x632/0x900 [ 36.237664] ? mas_walk+0x5c7/0x7c0 [ 36.238163] do_vmi_munmap+0x1f1/0x2b0 [ 36.238699] mmap_region+0x1f9/0x2660 [ 36.239212] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.239760] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.240527] ? __pfx_lock_acquire+0x10/0x10 [ 36.241098] ? __pfx_mmap_region+0x10/0x10 [ 36.241661] ? security_mmap_addr+0x7d/0xa0 [ 36.242217] ? get_unmapped_area+0x1f5/0x3f0 [ 36.242815] do_mmap+0x854/0xf00 [ 36.243282] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.243808] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.244399] ksys_mmap_pgoff+0x3af/0x500 [ 36.244944] do_syscall_64+0x3f/0x90 [ 36.245456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.246149] RIP: 0033:0x7f9d34e51d82 [ 36.246654] 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 [ 36.248921] RSP: 002b:00007fff47f15478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.249883] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d34e51d82 [ 36.250795] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d3428b000 [ 36.251693] RBP: 00007f9d3428b000 R08: 0000000000000009 R09: 0000000000001000 [ 36.252582] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588ac37eb20 [ 36.253463] R13: 00007fff47f15490 R14: 00007fff47f154c0 R15: 00007fff47f15820 [ 36.254360] [ 36.254676] [ 36.254898] Allocated by task 212: [ 36.255345] kasan_save_stack+0x22/0x50 [ 36.255875] kasan_set_track+0x25/0x30 [ 36.256400] __kasan_slab_alloc+0x59/0x70 [ 36.256946] kmem_cache_alloc+0x16b/0x370 [ 36.257495] vm_area_dup+0x20/0x160 [ 36.257969] __split_vma+0x170/0x950 [ 36.258458] split_vma+0xc6/0x110 [ 36.258941] mprotect_fixup+0x8d2/0xb30 [ 36.259465] do_mprotect_pkey+0x87e/0xd40 [ 36.260079] __x64_sys_mprotect+0x78/0xc0 [ 36.260650] do_syscall_64+0x3f/0x90 [ 36.261153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.261828] [ 36.262050] Freed by task 212: [ 36.262472] kasan_save_stack+0x22/0x50 [ 36.262993] kasan_set_track+0x25/0x30 [ 36.263502] kasan_save_free_info+0x2b/0x50 [ 36.264044] __kasan_slab_free+0x10a/0x190 [ 36.264595] kmem_cache_free+0x10d/0x4d0 [ 36.265108] rcu_core+0x8c8/0x2860 [ 36.265570] __do_softirq+0x1b7/0x7d4 [ 36.266055] [ 36.266275] Last potentially related work creation: [ 36.266894] kasan_save_stack+0x22/0x50 [ 36.267413] __kasan_record_aux_stack+0x8e/0xa0 [ 36.268003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.268665] remove_vma+0x139/0x170 [ 36.269129] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.269703] do_vmi_munmap+0x1f1/0x2b0 [ 36.270194] __vm_munmap+0x138/0x3a0 [ 36.270686] __x64_sys_munmap+0x59/0x80 [ 36.271191] do_syscall_64+0x3f/0x90 [ 36.271680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.272342] [ 36.272565] The buggy address belongs to the object at ffff8880165169f8 [ 36.272565] which belongs to the cache vm_area_struct of size 168 [ 36.274078] The buggy address is located 88 bytes inside of [ 36.274078] freed 168-byte region [ffff8880165169f8, ffff888016516aa0) [ 36.275529] [ 36.275754] The buggy address belongs to the physical page: [ 36.276422] page:00000000aae1c09c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16516 [ 36.277534] memcg:ffff888009a70101 [ 36.278047] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.278768] page_type: 0xffffffff() [ 36.279256] raw: 0100000000000200 ffff8880087a0c80 ffffea000065e680 dead000000000005 [ 36.280189] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a70101 [ 36.281094] page dumped because: kasan: bad access detected [ 36.281762] [ 36.281983] Memory state around the buggy address: [ 36.282574] ffff888016516900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.283432] ffff888016516980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 36.284288] >ffff888016516a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.285138] ^ [ 36.285839] ffff888016516a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 36.286722] ffff888016516b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.287574] ================================================================== [ 36.288480] Disabling lock debugging due to kernel taint [ 38.325469] BUG: Bad rss-counter state mm:000000008aa61b57 type:MM_FILEPAGES val:33 [ 38.326691] BUG: Bad rss-counter state mm:000000008aa61b57 type:MM_ANONPAGES val:22 [ 38.763735] BUG: Bad rss-counter state mm:0000000096881dbb type:MM_FILEPAGES val:33 [ 38.764940] BUG: Bad rss-counter state mm:0000000096881dbb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38987' (ECDSA) to the list of known hosts. 2023/06/20 11:31:20 fuzzer started 2023/06/20 11:31:20 dialing manager at localhost:36067 2023/06/20 11:31:20 checking machine... 2023/06/20 11:31:20 checking revisions... [ 39.439901] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:31:21 testing simple program... [ 39.488196] cgroup: Unknown subsys name 'net' [ 39.538041] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:31:20 Registers: info registers vcpu 0 RAX=ffff88800d0dac80 RBX=ffff88800dcb8000 RCX=0000000000000009 RDX=0000000000000000 RSI=ffff88800d0dac80 RDI=ffff8880087b8780 RBP=ffff888018c5fd80 RSP=ffff888018c5fd50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d7d R12=ffff8880087b8780 R13=ffffea0000372e00 R14=ffffffff8186b835 R15=ffff888016631000 RIP=ffffffff81809df3 RFL=00000256 [---ZAP-] 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 00007fadab092900 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=00007fadab647650 CR3=000000000ea80000 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=746f6f72207265737520726f66206465 XMM02=0000000000000000000000ffffffffff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=6f69737365735f6e65706f0000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86138f57 RBX=0000000000000001 RCX=ffffffff86138f52 RDX=0000000000000002 RSI=0000000000000007 RDI=ffffffff85dfe0a0 RBP=ffff8880147bfa30 RSP=ffff8880147bf968 R8 =ffffffff86138f52 R9 =ffff8880147bfa18 R10=0000000000038001 R11=0000000000020db7 R12=ffff8880147bfa38 R13=ffff8880147bfa20 R14=ffff8880147bfa19 R15=ffff8880147bf9d8 RIP=ffffffff81130a72 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 00007fbafb85b900 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=00007fbafaca0320 CR3=000000000d69c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6c0b6b0b3e6c2d9e00000000000ae988 XMM05=3f791276f573d0f50000000000133158 XMM06=19e9129bd510f2350000000000131ca0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000