syzkaller login: [ 71.255860] BUG: Bad rss-counter state mm:00000000dc16beb6 type:MM_FILEPAGES val:33 [ 71.256860] BUG: Bad rss-counter state mm:00000000dc16beb6 type:MM_ANONPAGES val:22 [ 71.422682] ================================================================== [ 71.423766] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.424874] Read of size 8 at addr ffff888019d02c20 by task sshd/220 [ 71.425854] [ 71.426074] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 71.426952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.427969] Call Trace: [ 71.428294] [ 71.428585] dump_stack_lvl+0x91/0xf0 [ 71.429075] print_report+0xcc/0x620 [ 71.429575] ? __virt_addr_valid+0x102/0x340 [ 71.430152] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.430784] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.431401] kasan_report+0xbe/0xf0 [ 71.431885] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.432513] vma_interval_tree_remove+0xc75/0xec0 [ 71.433129] vma_prepare+0xc54/0x11a0 [ 71.433643] __split_vma+0x5af/0x950 [ 71.434121] ? __pfx___split_vma+0x10/0x10 [ 71.434660] ? find_held_lock+0x2c/0x110 [ 71.435189] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.435772] ? lock_is_held_type+0x9f/0x120 [ 71.436318] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.436950] ? mtree_range_walk+0x632/0x900 [ 71.437523] ? mas_walk+0x5c7/0x7c0 [ 71.438012] do_vmi_munmap+0x1f1/0x2b0 [ 71.438515] mmap_region+0x1f9/0x2660 [ 71.439007] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.439539] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.440256] ? __pfx_lock_acquire+0x10/0x10 [ 71.440800] ? __pfx_mmap_region+0x10/0x10 [ 71.441344] ? security_mmap_addr+0x7d/0xa0 [ 71.441904] ? get_unmapped_area+0x1f5/0x3f0 [ 71.442468] do_mmap+0x854/0xf00 [ 71.442921] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.443427] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.444008] ksys_mmap_pgoff+0x3af/0x500 [ 71.444531] do_syscall_64+0x3f/0x90 [ 71.445014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.445685] RIP: 0033:0x7f2a5d359d82 [ 71.446148] 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 [ 71.448344] RSP: 002b:00007ffe612457f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.449255] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a5d359d82 [ 71.450118] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a5c793000 [ 71.450964] RBP: 00007f2a5c793000 R08: 0000000000000009 R09: 0000000000001000 [ 71.451815] R10: 0000000000000812 R11: 0000000000000206 R12: 000055990b70cec0 [ 71.452671] R13: 00007ffe61245810 R14: 00007ffe61245840 R15: 00007ffe61245ba0 [ 71.453550] [ 71.453850] [ 71.454069] Allocated by task 213: [ 71.454503] kasan_save_stack+0x22/0x50 [ 71.455012] kasan_set_track+0x25/0x30 [ 71.455527] __kasan_slab_alloc+0x59/0x70 [ 71.456062] kmem_cache_alloc+0x16b/0x370 [ 71.456581] vm_area_dup+0x20/0x160 [ 71.457038] __split_vma+0x170/0x950 [ 71.457521] split_vma+0xc6/0x110 [ 71.457976] mprotect_fixup+0x8d2/0xb30 [ 71.458486] do_mprotect_pkey+0x87e/0xd40 [ 71.459010] __x64_sys_mprotect+0x78/0xc0 [ 71.459541] do_syscall_64+0x3f/0x90 [ 71.460022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.460670] [ 71.460889] Freed by task 202: [ 71.461285] kasan_save_stack+0x22/0x50 [ 71.461808] kasan_set_track+0x25/0x30 [ 71.462310] kasan_save_free_info+0x2b/0x50 [ 71.462847] __kasan_slab_free+0x10a/0x190 [ 71.463387] kmem_cache_free+0x10d/0x4d0 [ 71.463903] rcu_core+0x8c8/0x2860 [ 71.464359] __do_softirq+0x1b7/0x7d4 [ 71.464854] [ 71.465068] Last potentially related work creation: [ 71.465690] kasan_save_stack+0x22/0x50 [ 71.466205] __kasan_record_aux_stack+0x8e/0xa0 [ 71.466787] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.467429] remove_vma+0x139/0x170 [ 71.467893] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.468465] do_vmi_munmap+0x1f1/0x2b0 [ 71.468960] __vm_munmap+0x138/0x3a0 [ 71.469436] __x64_sys_munmap+0x59/0x80 [ 71.469943] do_syscall_64+0x3f/0x90 [ 71.470422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.471075] [ 71.471289] The buggy address belongs to the object at ffff888019d02bc8 [ 71.471289] which belongs to the cache vm_area_struct of size 168 [ 71.472759] The buggy address is located 88 bytes inside of [ 71.472759] freed 168-byte region [ffff888019d02bc8, ffff888019d02c70) [ 71.474191] [ 71.474411] The buggy address belongs to the physical page: [ 71.475073] page:000000006228eea5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d02 [ 71.476188] memcg:ffff88800eeff901 [ 71.476626] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.477278] page_type: 0xffffffff() [ 71.477740] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 71.478668] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeff901 [ 71.479590] page dumped because: kasan: bad access detected [ 71.480257] [ 71.480477] Memory state around the buggy address: [ 71.481072] ffff888019d02b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.481953] ffff888019d02b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 71.482816] >ffff888019d02c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 71.483684] ^ [ 71.484228] ffff888019d02c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 71.485095] ffff888019d02d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 71.485965] ================================================================== [ 71.487270] Disabling lock debugging due to kernel taint [ 73.657346] BUG: Bad rss-counter state mm:00000000a159796d type:MM_FILEPAGES val:33 [ 73.658586] BUG: Bad rss-counter state mm:00000000a159796d type:MM_ANONPAGES val:22 [ 74.049358] BUG: Bad rss-counter state mm:000000001ea98374 type:MM_FILEPAGES val:33 [ 74.050392] BUG: Bad rss-counter state mm:000000001ea98374 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51418' (ECDSA) to the list of known hosts. 2023/06/20 07:31:11 fuzzer started 2023/06/20 07:31:11 dialing manager at localhost:44161 2023/06/20 07:31:11 checking machine... 2023/06/20 07:31:11 checking revisions... [ 74.780007] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:31:11 testing simple program... [ 74.829660] cgroup: Unknown subsys name 'net' [ 74.872599] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:30:58 Registers: info registers vcpu 0 RAX=ffffffff861375e5 RBX=0000000000000002 RCX=ffffffff861375e0 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff861375e4 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130abf 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 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=00007f1a4fee3020 CR3=000000000b3ac000 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=408ac4303556f99a6d4dbe7ece74f172 XMM02=ec2efd57dc4c00df000000000011e310 XMM03=893dd40fdd7ce822000000000011e3e0 XMM04=9400bc626c23edce00000000000ae988 XMM05=19e9129bd510f23500000000001349d8 XMM06=06147bc3857e00e10000000000133928 XMM07=e042d86d42eb936e00000000001252a0 XMM08=893dd40fdd7ce822000000000011e3e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009457df0 RCX=0000000000000000 RDX=ffff888014703680 RSI=ffffffff8185999e RDI=0000000000000007 RBP=0000000000008000 RSP=ffff888009457d80 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000008000 R13=ffff888009457ea8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c081b 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 00007f1f39e1f900 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=00007ffcad74b000 CR3=000000000eaf4000 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=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