syzkaller login: [ 32.115983] BUG: Bad rss-counter state mm:00000000c18775a1 type:MM_FILEPAGES val:33 [ 32.117769] BUG: Bad rss-counter state mm:00000000c18775a1 type:MM_ANONPAGES val:22 [ 32.259910] ================================================================== [ 32.261047] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.262294] Read of size 8 at addr ffff88800c559df0 by task sshd/220 [ 32.263145] [ 32.263388] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.264353] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.265420] Call Trace: [ 32.265784] [ 32.266098] dump_stack_lvl+0x91/0xf0 [ 32.266641] print_report+0xcc/0x620 [ 32.267180] ? __virt_addr_valid+0x102/0x340 [ 32.267803] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.268494] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.269174] kasan_report+0xbe/0xf0 [ 32.269703] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.270408] vma_interval_tree_remove+0xc75/0xec0 [ 32.271090] vma_prepare+0xc54/0x11a0 [ 32.271630] __split_vma+0x5af/0x950 [ 32.272163] ? __pfx___split_vma+0x10/0x10 [ 32.272770] ? find_held_lock+0x2c/0x110 [ 32.273359] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.274048] ? lock_is_held_type+0x9f/0x120 [ 32.274656] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.275343] ? mtree_range_walk+0x632/0x900 [ 32.275960] ? mas_walk+0x5c7/0x7c0 [ 32.276482] do_vmi_munmap+0x1f1/0x2b0 [ 32.277025] mmap_region+0x1f9/0x2660 [ 32.277566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.278128] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.278909] ? __pfx_lock_acquire+0x10/0x10 [ 32.279493] ? __pfx_mmap_region+0x10/0x10 [ 32.280070] ? security_mmap_addr+0x7d/0xa0 [ 32.280648] ? get_unmapped_area+0x1f5/0x3f0 [ 32.281249] do_mmap+0x854/0xf00 [ 32.281747] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.282298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.282918] ksys_mmap_pgoff+0x3af/0x500 [ 32.283484] do_syscall_64+0x3f/0x90 [ 32.284019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.284746] RIP: 0033:0x7f7fb2c3cd82 [ 32.285258] 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 [ 32.287636] RSP: 002b:00007ffe13c40ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.288650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7fb2c3cd82 [ 32.289603] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7fb2076000 [ 32.290544] RBP: 00007f7fb2076000 R08: 0000000000000009 R09: 0000000000001000 [ 32.291483] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6dc273ec0 [ 32.292429] R13: 00007ffe13c40f00 R14: 00007ffe13c40f30 R15: 00007ffe13c41290 [ 32.293375] [ 32.293713] [ 32.293952] Allocated by task 213: [ 32.294418] kasan_save_stack+0x22/0x50 [ 32.294979] kasan_set_track+0x25/0x30 [ 32.295521] __kasan_slab_alloc+0x59/0x70 [ 32.296101] kmem_cache_alloc+0x16b/0x370 [ 32.296677] vm_area_dup+0x20/0x160 [ 32.297182] __split_vma+0x170/0x950 [ 32.297714] split_vma+0xc6/0x110 [ 32.298204] mprotect_fixup+0x8d2/0xb30 [ 32.298765] do_mprotect_pkey+0x87e/0xd40 [ 32.299344] __x64_sys_mprotect+0x78/0xc0 [ 32.299918] do_syscall_64+0x3f/0x90 [ 32.300442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.301144] [ 32.301382] Freed by task 203: [ 32.301828] kasan_save_stack+0x22/0x50 [ 32.302383] kasan_set_track+0x25/0x30 [ 32.302933] kasan_save_free_info+0x2b/0x50 [ 32.303528] __kasan_slab_free+0x10a/0x190 [ 32.304110] kmem_cache_free+0x10d/0x4d0 [ 32.304669] rcu_core+0x8c8/0x2860 [ 32.305160] __do_softirq+0x1b7/0x7d4 [ 32.305694] [ 32.305932] Last potentially related work creation: [ 32.306577] kasan_save_stack+0x22/0x50 [ 32.307124] __kasan_record_aux_stack+0x8e/0xa0 [ 32.307747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.308451] remove_vma+0x139/0x170 [ 32.308947] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.309572] do_vmi_munmap+0x1f1/0x2b0 [ 32.310102] __vm_munmap+0x138/0x3a0 [ 32.310608] __x64_sys_munmap+0x59/0x80 [ 32.311148] do_syscall_64+0x3f/0x90 [ 32.311673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.312382] [ 32.312616] The buggy address belongs to the object at ffff88800c559d98 [ 32.312616] which belongs to the cache vm_area_struct of size 168 [ 32.314219] The buggy address is located 88 bytes inside of [ 32.314219] freed 168-byte region [ffff88800c559d98, ffff88800c559e40) [ 32.315721] [ 32.315954] The buggy address belongs to the physical page: [ 32.316667] page:00000000afa786f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc559 [ 32.317841] memcg:ffff88800f0fbd01 [ 32.318301] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.318991] page_type: 0xffffffff() [ 32.319483] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.320480] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0fbd01 [ 32.321470] page dumped because: kasan: bad access detected [ 32.322179] [ 32.322415] Memory state around the buggy address: [ 32.323048] ffff88800c559c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.323974] ffff88800c559d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.324913] >ffff88800c559d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.325841] ^ [ 32.326700] ffff88800c559e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.327629] ffff88800c559e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.328541] ================================================================== [ 32.329606] Disabling lock debugging due to kernel taint [ 34.169988] BUG: Bad rss-counter state mm:00000000c75d8ded type:MM_FILEPAGES val:33 [ 34.171021] BUG: Bad rss-counter state mm:00000000c75d8ded type:MM_ANONPAGES val:22 [ 34.730259] BUG: Bad rss-counter state mm:00000000dcca6fd8 type:MM_FILEPAGES val:33 [ 34.731449] BUG: Bad rss-counter state mm:00000000dcca6fd8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46770' (ECDSA) to the list of known hosts. 2023/06/20 03:45:10 fuzzer started 2023/06/20 03:45:10 dialing manager at localhost:44161 2023/06/20 03:45:10 checking machine... 2023/06/20 03:45:10 checking revisions... [ 35.369084] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:45:10 testing simple program... [ 35.422103] cgroup: Unknown subsys name 'net' [ 35.458897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:45:08 Registers: info registers vcpu 0 RAX=ffffffff81809911 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002bd7ee5 RSI=ffffffff81809911 RDI=ffff888015ebf798 RBP=ffff888015ebf768 RSP=ffff888015ebf6c8 R8 =0000000000000001 R9 =ffff888015ebf710 R10=0000000000038001 R11=000000000000fc0f R12=ffff888015ebf798 R13=0000000000000000 R14=ffff888015c81b40 R15=0000000000000024 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007fcec13e9900 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=00007ffce94d9000 CR3=0000000009494000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff8880165cbd98 RCX=ffff8880165cbd98 RDX=0000000000110011 RSI=ffff8880165cbd98 RDI=ffff88800879fc80 RBP=ffff88800f08f758 RSP=ffff88800f08f6c0 R8 =0000000080110010 R9 =0000000000000000 R10=ffffea00005972c0 R11=0000000000120011 R12=ffffea00005972c0 R13=0000000000000000 R14=0000000000110010 R15=ffff88800879fc80 RIP=ffffffff818094f2 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 00007f74fd041700 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=00007f8c9f639a20 CR3=000000000e10c000 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=2030313a35343a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a35343a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000