syzkaller login: [ 38.974539] BUG: Bad rss-counter state mm:000000009426ff73 type:MM_FILEPAGES val:33 [ 38.975598] BUG: Bad rss-counter state mm:000000009426ff73 type:MM_ANONPAGES val:22 [ 39.138891] ================================================================== [ 39.139975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.141098] Read of size 8 at addr ffff88800ddb4880 by task sshd/219 [ 39.142092] [ 39.142347] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.143227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.144218] Call Trace: [ 39.144539] [ 39.144824] dump_stack_lvl+0x91/0xf0 [ 39.145313] print_report+0xcc/0x620 [ 39.145810] ? __virt_addr_valid+0x102/0x340 [ 39.146363] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.146977] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.147597] kasan_report+0xbe/0xf0 [ 39.148074] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.148695] vma_interval_tree_remove+0xc75/0xec0 [ 39.149298] vma_prepare+0xc54/0x11a0 [ 39.149803] __split_vma+0x5af/0x950 [ 39.150289] ? __pfx___split_vma+0x10/0x10 [ 39.150822] ? find_held_lock+0x2c/0x110 [ 39.151347] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.151914] ? lock_is_held_type+0x9f/0x120 [ 39.152456] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.153083] ? mtree_range_walk+0x632/0x900 [ 39.153633] ? mas_walk+0x5c7/0x7c0 [ 39.154126] do_vmi_munmap+0x1f1/0x2b0 [ 39.154619] mmap_region+0x1f9/0x2660 [ 39.155109] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.155627] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.156345] ? __pfx_lock_acquire+0x10/0x10 [ 39.156873] ? __pfx_mmap_region+0x10/0x10 [ 39.157407] ? security_mmap_addr+0x7d/0xa0 [ 39.157951] ? get_unmapped_area+0x1f5/0x3f0 [ 39.158501] do_mmap+0x854/0xf00 [ 39.158944] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.159443] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.160003] ksys_mmap_pgoff+0x3af/0x500 [ 39.160510] do_syscall_64+0x3f/0x90 [ 39.160993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.161645] RIP: 0033:0x7f5c9a64bd82 [ 39.162120] 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 [ 39.164257] RSP: 002b:00007fff7de72768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.165166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c9a64bd82 [ 39.166019] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c99a85000 [ 39.166873] RBP: 00007f5c99a85000 R08: 0000000000000009 R09: 0000000000001000 [ 39.167725] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d685a89d90 [ 39.168578] R13: 00007fff7de72780 R14: 00007fff7de727b0 R15: 00007fff7de72b10 [ 39.169448] [ 39.169750] [ 39.169967] Allocated by task 212: [ 39.170409] kasan_save_stack+0x22/0x50 [ 39.170916] kasan_set_track+0x25/0x30 [ 39.171413] __kasan_slab_alloc+0x59/0x70 [ 39.171947] kmem_cache_alloc+0x16b/0x370 [ 39.172469] vm_area_dup+0x20/0x160 [ 39.172922] __split_vma+0x170/0x950 [ 39.173389] split_vma+0xc6/0x110 [ 39.173852] mprotect_fixup+0x8d2/0xb30 [ 39.174359] do_mprotect_pkey+0x87e/0xd40 [ 39.174896] __x64_sys_mprotect+0x78/0xc0 [ 39.175419] do_syscall_64+0x3f/0x90 [ 39.175897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.176552] [ 39.176782] Freed by task 212: [ 39.177178] kasan_save_stack+0x22/0x50 [ 39.177694] kasan_set_track+0x25/0x30 [ 39.178188] kasan_save_free_info+0x2b/0x50 [ 39.178719] __kasan_slab_free+0x10a/0x190 [ 39.179252] kmem_cache_free+0x10d/0x4d0 [ 39.179767] rcu_core+0x8c8/0x2860 [ 39.180215] __do_softirq+0x1b7/0x7d4 [ 39.180693] [ 39.180915] Last potentially related work creation: [ 39.181507] kasan_save_stack+0x22/0x50 [ 39.182015] __kasan_record_aux_stack+0x8e/0xa0 [ 39.182591] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.183240] remove_vma+0x139/0x170 [ 39.183700] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.184263] do_vmi_munmap+0x1f1/0x2b0 [ 39.184749] __vm_munmap+0x138/0x3a0 [ 39.185224] __x64_sys_munmap+0x59/0x80 [ 39.185740] do_syscall_64+0x3f/0x90 [ 39.186216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.186877] [ 39.187093] The buggy address belongs to the object at ffff88800ddb4828 [ 39.187093] which belongs to the cache vm_area_struct of size 168 [ 39.188565] The buggy address is located 88 bytes inside of [ 39.188565] freed 168-byte region [ffff88800ddb4828, ffff88800ddb48d0) [ 39.190000] [ 39.190216] The buggy address belongs to the physical page: [ 39.190884] page:000000008e82ac8a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddb4 [ 39.191964] memcg:ffff88800e180301 [ 39.192393] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.193101] page_type: 0xffffffff() [ 39.193554] raw: 0100000000000200 ffff8880087a0c80 ffffea0000387d80 dead000000000003 [ 39.194490] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e180301 [ 39.195395] page dumped because: kasan: bad access detected [ 39.196060] [ 39.196275] Memory state around the buggy address: [ 39.196863] ffff88800ddb4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.197742] ffff88800ddb4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.198611] >ffff88800ddb4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.199493] ^ [ 39.199918] ffff88800ddb4900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.200792] ffff88800ddb4980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 39.201665] ================================================================== [ 39.202717] Disabling lock debugging due to kernel taint [ 41.720747] BUG: Bad rss-counter state mm:00000000f3e3e14d type:MM_FILEPAGES val:33 [ 41.721680] BUG: Bad rss-counter state mm:00000000f3e3e14d type:MM_ANONPAGES val:22 [ 42.187615] BUG: Bad rss-counter state mm:00000000aa0c0b5d type:MM_FILEPAGES val:33 [ 42.188615] BUG: Bad rss-counter state mm:00000000aa0c0b5d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62178' (ECDSA) to the list of known hosts. 2023/06/20 13:08:35 fuzzer started 2023/06/20 13:08:35 dialing manager at localhost:36067 2023/06/20 13:08:35 checking machine... 2023/06/20 13:08:35 checking revisions... [ 42.939435] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:08:35 testing simple program... [ 42.991013] cgroup: Unknown subsys name 'net' [ 43.026539] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:08:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce40140 RCX=ffffffff812e0473 RDX=1ffff1100d9c802a RSI=0000000000000004 RDI=ffff88806ce40140 RBP=ffff88806ce40148 RSP=ffff88800da7f150 R8 =0000000000000000 R9 =ffffed100d9c8028 R10=ffff88806ce40143 R11=00000000000b6a61 R12=ffff88806ce40150 R13=ffffea0000684e40 R14=dffffc0000000000 R15=ffff88807ffdc500 RIP=ffffffff812e0523 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 00007fbd0e380900 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=00007efc539b5650 CR3=000000000c688000 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=bee08d0a9953414300000000000ae988 XMM05=1319e678c5640f8a0000000000132c90 XMM06=94aac670ef06ff650000000000132bf8 XMM07=58f17c1affdc82d60000000000122c28 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffba7d6b4 RBX=ffffffff85e0702c RCX=ffffffff81884b13 RDX=0000000000000000 RSI=ffffffff861466a4 RDI=ffffffff85e0702c RBP=ffffffff85e0702c RSP=ffff888019ce7468 R8 =ffffffff861466a4 R9 =ffff888019ce7560 R10=0000000000038001 R11=000000000002319a R12=ffffffff85e0702c R13=ffffffff85e0702c R14=ffffffff85e0702c R15=dffffc0000000000 RIP=ffffffff8112fc93 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 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=00007fe0898ef790 CR3=000000001c8aa000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000