syzkaller login: [ 38.740895] BUG: Bad rss-counter state mm:000000002cff909d type:MM_FILEPAGES val:33 [ 38.742134] BUG: Bad rss-counter state mm:000000002cff909d type:MM_ANONPAGES val:22 [ 38.784659] ================================================================== [ 38.785412] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.786164] Read of size 8 at addr ffff88800dfab310 by task sshd/220 [ 38.786862] [ 38.787038] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.787723] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.788530] Call Trace: [ 38.788804] [ 38.789032] dump_stack_lvl+0x91/0xf0 [ 38.789426] print_report+0xcc/0x620 [ 38.789817] ? __virt_addr_valid+0x102/0x340 [ 38.790262] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.790757] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.791240] kasan_report+0xbe/0xf0 [ 38.791627] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.792117] vma_interval_tree_remove+0xc75/0xec0 [ 38.792607] vma_prepare+0xc54/0x11a0 [ 38.792996] __split_vma+0x5af/0x950 [ 38.793377] ? __pfx___split_vma+0x10/0x10 [ 38.793803] ? find_held_lock+0x2c/0x110 [ 38.794220] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.794678] ? lock_is_held_type+0x9f/0x120 [ 38.795116] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.795601] ? mtree_range_walk+0x632/0x900 [ 38.796039] ? mas_walk+0x5c7/0x7c0 [ 38.796435] do_vmi_munmap+0x1f1/0x2b0 [ 38.796819] mmap_region+0x1f9/0x2660 [ 38.797083] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.797360] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.797745] ? __pfx_lock_acquire+0x10/0x10 [ 38.798032] ? __pfx_mmap_region+0x10/0x10 [ 38.798320] ? security_mmap_addr+0x7d/0xa0 [ 38.798609] ? get_unmapped_area+0x1f5/0x3f0 [ 38.798902] do_mmap+0x854/0xf00 [ 38.799140] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.799407] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.799710] ksys_mmap_pgoff+0x3af/0x500 [ 38.799986] do_syscall_64+0x3f/0x90 [ 38.800246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.800610] RIP: 0033:0x7fb05bd4dd82 [ 38.800864] 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 [ 38.802025] RSP: 002b:00007ffffc99dd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.802517] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb05bd4dd82 [ 38.802973] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb05b187000 [ 38.803430] RBP: 00007fb05b187000 R08: 0000000000000009 R09: 0000000000001000 [ 38.803888] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bfd450bf70 [ 38.804341] R13: 00007ffffc99dd80 R14: 00007ffffc99ddb0 R15: 00007ffffc99e110 [ 38.804826] [ 38.804985] [ 38.805101] Allocated by task 213: [ 38.805338] kasan_save_stack+0x22/0x50 [ 38.805614] kasan_set_track+0x25/0x30 [ 38.805884] __kasan_slab_alloc+0x59/0x70 [ 38.806165] kmem_cache_alloc+0x16b/0x370 [ 38.806447] vm_area_dup+0x20/0x160 [ 38.806699] __split_vma+0x170/0x950 [ 38.806950] split_vma+0xc6/0x110 [ 38.807190] mprotect_fixup+0x8d2/0xb30 [ 38.807467] do_mprotect_pkey+0x87e/0xd40 [ 38.807747] __x64_sys_mprotect+0x78/0xc0 [ 38.808034] do_syscall_64+0x3f/0x90 [ 38.808292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.808649] [ 38.808769] Freed by task 213: [ 38.808983] kasan_save_stack+0x22/0x50 [ 38.809256] kasan_set_track+0x25/0x30 [ 38.809523] kasan_save_free_info+0x2b/0x50 [ 38.809808] __kasan_slab_free+0x10a/0x190 [ 38.810096] kmem_cache_free+0x10d/0x4d0 [ 38.810370] rcu_core+0x8c8/0x2860 [ 38.810609] __do_softirq+0x1b7/0x7d4 [ 38.810869] [ 38.810985] Last potentially related work creation: [ 38.811301] kasan_save_stack+0x22/0x50 [ 38.811573] __kasan_record_aux_stack+0x8e/0xa0 [ 38.811882] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.812226] remove_vma+0x139/0x170 [ 38.812478] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.812802] do_vmi_munmap+0x1f1/0x2b0 [ 38.813083] __vm_munmap+0x138/0x3a0 [ 38.813354] __x64_sys_munmap+0x59/0x80 [ 38.813645] do_syscall_64+0x3f/0x90 [ 38.813919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.814294] [ 38.814422] Second to last potentially related work creation: [ 38.814817] kasan_save_stack+0x22/0x50 [ 38.815108] __kasan_record_aux_stack+0x8e/0xa0 [ 38.815439] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.815811] remove_vma+0x139/0x170 [ 38.816071] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.816402] do_vmi_munmap+0x1f1/0x2b0 [ 38.816686] mmap_region+0x1f9/0x2660 [ 38.816964] do_mmap+0x854/0xf00 [ 38.817215] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.817499] ksys_mmap_pgoff+0x3af/0x500 [ 38.817789] do_syscall_64+0x3f/0x90 [ 38.818064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.818435] [ 38.818559] The buggy address belongs to the object at ffff88800dfab2b8 [ 38.818559] which belongs to the cache vm_area_struct of size 168 [ 38.819413] The buggy address is located 88 bytes inside of [ 38.819413] freed 168-byte region [ffff88800dfab2b8, ffff88800dfab360) [ 38.820227] [ 38.820349] The buggy address belongs to the physical page: [ 38.820747] page:0000000063d05609 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfab [ 38.821382] memcg:ffff88800dfa9d01 [ 38.821631] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.822040] page_type: 0xffffffff() [ 38.822296] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.822834] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfa9d01 [ 38.823362] page dumped because: kasan: bad access detected [ 38.823745] [ 38.823869] Memory state around the buggy address: [ 38.824206] ffff88800dfab200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.824710] ffff88800dfab280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.825206] >ffff88800dfab300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.825709] ^ [ 38.825980] ffff88800dfab380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.826476] ffff88800dfab400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.826980] ================================================================== [ 38.827605] Disabling lock debugging due to kernel taint [ 40.225219] BUG: Bad rss-counter state mm:00000000d9bc3bcc type:MM_FILEPAGES val:33 [ 40.225851] BUG: Bad rss-counter state mm:00000000d9bc3bcc type:MM_ANONPAGES val:22 [ 40.582703] BUG: Bad rss-counter state mm:00000000a8fba7d2 type:MM_FILEPAGES val:33 [ 40.583723] BUG: Bad rss-counter state mm:00000000a8fba7d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59216' (ECDSA) to the list of known hosts. 2023/06/21 00:18:39 fuzzer started 2023/06/21 00:18:39 dialing manager at localhost:36067 2023/06/21 00:18:39 checking machine... 2023/06/21 00:18:39 checking revisions... [ 41.393520] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:18:40 testing simple program... [ 41.442995] cgroup: Unknown subsys name 'net' [ 41.494269] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:18:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff852c95b8 RCX=0000000000000000 RDX=ffff88800fd29b40 RSI=0000000000000000 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff888019e4f9a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800b5f8c98 R14=0000000000000081 R15=ffff88800b5f8c9a RIP=ffffffff814c0400 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 00007f7c369bf900 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=00007ffea652a000 CR3=000000000e7be000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fbee73911c0 CR3=0000000019fb8000 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=2039333a38313a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a38313a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000