syzkaller login: [ 34.089665] BUG: Bad rss-counter state mm:0000000097ebf25c type:MM_FILEPAGES val:33 [ 34.090556] BUG: Bad rss-counter state mm:0000000097ebf25c type:MM_ANONPAGES val:22 [ 34.210352] ================================================================== [ 34.211044] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.211652] Read of size 8 at addr ffff88800e9513f8 by task sshd/222 [ 34.212134] [ 34.212270] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.212831] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.213446] Call Trace: [ 34.213680] [ 34.213880] dump_stack_lvl+0x91/0xf0 [ 34.214209] print_report+0xcc/0x620 [ 34.214985] ? __virt_addr_valid+0x102/0x340 [ 34.215493] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.216122] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.216733] kasan_report+0xbe/0xf0 [ 34.217276] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.217822] vma_interval_tree_remove+0xc75/0xec0 [ 34.218373] vma_prepare+0xc54/0x11a0 [ 34.218852] __split_vma+0x5af/0x950 [ 34.219257] ? __pfx___split_vma+0x10/0x10 [ 34.219699] ? find_held_lock+0x2c/0x110 [ 34.220175] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.220642] ? lock_is_held_type+0x9f/0x120 [ 34.221075] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.221551] ? mtree_range_walk+0x632/0x900 [ 34.221951] ? mas_walk+0x5c7/0x7c0 [ 34.222336] do_vmi_munmap+0x1f1/0x2b0 [ 34.222803] mmap_region+0x1f9/0x2660 [ 34.223206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.223581] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.224094] ? __pfx_lock_acquire+0x10/0x10 [ 34.224480] ? __pfx_mmap_region+0x10/0x10 [ 34.224852] ? security_mmap_addr+0x7d/0xa0 [ 34.225258] ? get_unmapped_area+0x1f5/0x3f0 [ 34.225694] do_mmap+0x854/0xf00 [ 34.226045] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.226415] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.226837] ksys_mmap_pgoff+0x3af/0x500 [ 34.227178] do_syscall_64+0x3f/0x90 [ 34.227487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.227913] RIP: 0033:0x7fa122f92d82 [ 34.228224] 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 [ 34.229592] RSP: 002b:00007fff7a7bbe78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.230181] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa122f92d82 [ 34.230771] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1223cc000 [ 34.231313] RBP: 00007fa1223cc000 R08: 0000000000000009 R09: 0000000000001000 [ 34.231865] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556cd003dec0 [ 34.232439] R13: 00007fff7a7bbe90 R14: 00007fff7a7bbec0 R15: 00007fff7a7bc220 [ 34.233004] [ 34.233189] [ 34.233330] Allocated by task 215: [ 34.233605] kasan_save_stack+0x22/0x50 [ 34.233944] kasan_set_track+0x25/0x30 [ 34.234264] __kasan_slab_alloc+0x59/0x70 [ 34.234621] kmem_cache_alloc+0x16b/0x370 [ 34.235024] vm_area_dup+0x20/0x160 [ 34.235326] __split_vma+0x170/0x950 [ 34.235643] split_vma+0xc6/0x110 [ 34.235938] mprotect_fixup+0x8d2/0xb30 [ 34.236274] do_mprotect_pkey+0x87e/0xd40 [ 34.236618] __x64_sys_mprotect+0x78/0xc0 [ 34.236968] do_syscall_64+0x3f/0x90 [ 34.237272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.237700] [ 34.237873] Freed by task 19: [ 34.238180] kasan_save_stack+0x22/0x50 [ 34.238538] kasan_set_track+0x25/0x30 [ 34.238904] kasan_save_free_info+0x2b/0x50 [ 34.239240] __kasan_slab_free+0x10a/0x190 [ 34.239592] kmem_cache_free+0x10d/0x4d0 [ 34.239935] rcu_core+0x8c8/0x2860 [ 34.240225] __do_softirq+0x1b7/0x7d4 [ 34.240551] [ 34.240691] Last potentially related work creation: [ 34.241065] kasan_save_stack+0x22/0x50 [ 34.241393] __kasan_record_aux_stack+0x8e/0xa0 [ 34.241763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.242190] remove_vma+0x139/0x170 [ 34.242482] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.242860] do_vmi_munmap+0x1f1/0x2b0 [ 34.243166] __vm_munmap+0x138/0x3a0 [ 34.243460] __x64_sys_munmap+0x59/0x80 [ 34.243775] do_syscall_64+0x3f/0x90 [ 34.244110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.244522] [ 34.244658] The buggy address belongs to the object at ffff88800e9513a0 [ 34.244658] which belongs to the cache vm_area_struct of size 168 [ 34.245601] The buggy address is located 88 bytes inside of [ 34.245601] freed 168-byte region [ffff88800e9513a0, ffff88800e951448) [ 34.246496] [ 34.246639] The buggy address belongs to the physical page: [ 34.247086] page:00000000c4a9cadf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe951 [ 34.247781] memcg:ffff888018329801 [ 34.248061] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.248491] page_type: 0xffffffff() [ 34.248781] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.249371] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018329801 [ 34.249950] page dumped because: kasan: bad access detected [ 34.250371] [ 34.250515] Memory state around the buggy address: [ 34.250915] ffff88800e951280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.251456] ffff88800e951300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.252004] >ffff88800e951380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.252553] ^ [ 34.253083] ffff88800e951400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.253638] ffff88800e951480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.254183] ================================================================== [ 34.254948] Disabling lock debugging due to kernel taint [ 36.331009] BUG: Bad rss-counter state mm:00000000749ea973 type:MM_FILEPAGES val:33 [ 36.331691] BUG: Bad rss-counter state mm:00000000749ea973 type:MM_ANONPAGES val:22 [ 36.749869] BUG: Bad rss-counter state mm:0000000001e3373b type:MM_FILEPAGES val:33 [ 36.750802] BUG: Bad rss-counter state mm:0000000001e3373b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13687' (ECDSA) to the list of known hosts. 2023/06/20 09:47:56 fuzzer started 2023/06/20 09:47:56 dialing manager at localhost:44161 2023/06/20 09:47:56 checking machine... 2023/06/20 09:47:56 checking revisions... [ 37.360791] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:47:56 testing simple program... [ 37.400782] cgroup: Unknown subsys name 'net' [ 37.440318] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:47:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffcfa0f82f8 CR3=000000000dbbc000 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=2035353a37343a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a37343a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000016a477c960 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=0000000000054704 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f1b4f R11=0000000000000001 R12=0000000000054704 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000013 [----A-C] 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 00007f77efebd900 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=00007ffe864ddff8 CR3=000000000948e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000