syzkaller login: [ 34.578471] BUG: Bad rss-counter state mm:000000009ddcf4a0 type:MM_FILEPAGES val:33 [ 34.579469] BUG: Bad rss-counter state mm:000000009ddcf4a0 type:MM_ANONPAGES val:22 [ 34.750872] ================================================================== [ 34.751953] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.752891] Read of size 8 at addr ffff888019c204e0 by task sshd/220 [ 34.753739] [ 34.753962] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.754819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.755826] Call Trace: [ 34.756151] [ 34.756432] dump_stack_lvl+0x91/0xf0 [ 34.756920] print_report+0xcc/0x620 [ 34.757400] ? __virt_addr_valid+0x102/0x340 [ 34.757952] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.758572] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.759187] kasan_report+0xbe/0xf0 [ 34.759663] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.760304] vma_interval_tree_remove+0xc75/0xec0 [ 34.760904] vma_prepare+0xc54/0x11a0 [ 34.761380] __split_vma+0x5af/0x950 [ 34.761853] ? __pfx___split_vma+0x10/0x10 [ 34.762381] ? find_held_lock+0x2c/0x110 [ 34.762896] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.763457] ? lock_is_held_type+0x9f/0x120 [ 34.764005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.764610] ? mtree_range_walk+0x632/0x900 [ 34.765160] ? mas_walk+0x5c7/0x7c0 [ 34.765634] do_vmi_munmap+0x1f1/0x2b0 [ 34.766124] mmap_region+0x1f9/0x2660 [ 34.766601] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.767109] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.767833] ? __pfx_lock_acquire+0x10/0x10 [ 34.768364] ? __pfx_mmap_region+0x10/0x10 [ 34.768892] ? security_mmap_addr+0x7d/0xa0 [ 34.769429] ? get_unmapped_area+0x1f5/0x3f0 [ 34.769976] do_mmap+0x854/0xf00 [ 34.770411] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.770904] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.771459] ksys_mmap_pgoff+0x3af/0x500 [ 34.771986] do_syscall_64+0x3f/0x90 [ 34.772464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.773101] RIP: 0033:0x7fa3d94a8d82 [ 34.773556] 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 [ 34.775663] RSP: 002b:00007ffdaf3cd0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.776566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3d94a8d82 [ 34.777403] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3d88e2000 [ 34.778245] RBP: 00007fa3d88e2000 R08: 0000000000000009 R09: 0000000000001000 [ 34.779085] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd72c17ec0 [ 34.779960] R13: 00007ffdaf3cd100 R14: 00007ffdaf3cd130 R15: 00007ffdaf3cd490 [ 34.780810] [ 34.781101] [ 34.781317] Allocated by task 213: [ 34.781744] kasan_save_stack+0x22/0x50 [ 34.782249] kasan_set_track+0x25/0x30 [ 34.782737] __kasan_slab_alloc+0x59/0x70 [ 34.783261] kmem_cache_alloc+0x16b/0x370 [ 34.783783] vm_area_dup+0x20/0x160 [ 34.784235] __split_vma+0x170/0x950 [ 34.784697] split_vma+0xc6/0x110 [ 34.785133] mprotect_fixup+0x8d2/0xb30 [ 34.785633] do_mprotect_pkey+0x87e/0xd40 [ 34.786152] __x64_sys_mprotect+0x78/0xc0 [ 34.786666] do_syscall_64+0x3f/0x90 [ 34.787134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.787789] [ 34.788003] Freed by task 213: [ 34.788393] kasan_save_stack+0x22/0x50 [ 34.788893] kasan_set_track+0x25/0x30 [ 34.789382] kasan_save_free_info+0x2b/0x50 [ 34.789909] __kasan_slab_free+0x10a/0x190 [ 34.790444] kmem_cache_free+0x10d/0x4d0 [ 34.790947] rcu_core+0x8c8/0x2860 [ 34.791393] __do_softirq+0x1b7/0x7d4 [ 34.791869] [ 34.792089] Last potentially related work creation: [ 34.792672] kasan_save_stack+0x22/0x50 [ 34.793170] __kasan_record_aux_stack+0x8e/0xa0 [ 34.793742] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.794381] remove_vma+0x139/0x170 [ 34.794828] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.795388] do_vmi_munmap+0x1f1/0x2b0 [ 34.795895] __vm_munmap+0x138/0x3a0 [ 34.796360] __x64_sys_munmap+0x59/0x80 [ 34.796854] do_syscall_64+0x3f/0x90 [ 34.797327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.797966] [ 34.798179] The buggy address belongs to the object at ffff888019c20488 [ 34.798179] which belongs to the cache vm_area_struct of size 168 [ 34.799632] The buggy address is located 88 bytes inside of [ 34.799632] freed 168-byte region [ffff888019c20488, ffff888019c20530) [ 34.801033] [ 34.801248] The buggy address belongs to the physical page: [ 34.801901] page:00000000c067d4fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c20 [ 34.802984] memcg:ffff888015f86f01 [ 34.803404] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.804060] page_type: 0xffffffff() [ 34.804511] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.805423] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f86f01 [ 34.806323] page dumped because: kasan: bad access detected [ 34.806973] [ 34.807186] Memory state around the buggy address: [ 34.807768] ffff888019c20380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.808611] ffff888019c20400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 34.809456] >ffff888019c20480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.810298] ^ [ 34.811039] ffff888019c20500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 34.811910] ffff888019c20580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.812755] ================================================================== [ 34.813758] Disabling lock debugging due to kernel taint [ 37.080417] BUG: Bad rss-counter state mm:00000000fbd2e39d type:MM_FILEPAGES val:33 [ 37.081637] BUG: Bad rss-counter state mm:00000000fbd2e39d type:MM_ANONPAGES val:22 [ 37.593143] BUG: Bad rss-counter state mm:00000000cf2b189d type:MM_FILEPAGES val:33 [ 37.594345] BUG: Bad rss-counter state mm:00000000cf2b189d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4565' (ECDSA) to the list of known hosts. 2023/06/20 07:32:32 fuzzer started 2023/06/20 07:32:32 dialing manager at localhost:44161 2023/06/20 07:32:32 checking machine... 2023/06/20 07:32:32 checking revisions... [ 38.235247] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:32:32 testing simple program... [ 38.288415] cgroup: Unknown subsys name 'net' [ 38.353945] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:32:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110019448c8 RSI=ffffffff8486e780 RDI=ffff88800ca24648 RBP=ffff88800ca24628 RSP=ffff888015ed7cf0 R8 =0000000000000002 R9 =0000000000000000 R10=ffff88800ca2460f R11=00000000000b6996 R12=ffffffff870a5560 R13=0000000000000000 R14=ffffffff87b67200 R15=0000000000000001 RIP=ffffffff812db3b6 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 00007fc8bf2fc900 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=00007fff93229000 CR3=000000001ca7e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2f1bd8fe50 CR3=0000000019f42000 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=2031333a32333a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a32333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000