syzkaller login: [ 31.366305] BUG: Bad rss-counter state mm:0000000055d333e1 type:MM_FILEPAGES val:33 [ 31.367402] BUG: Bad rss-counter state mm:0000000055d333e1 type:MM_ANONPAGES val:22 [ 31.532102] ================================================================== [ 31.533044] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.534015] Read of size 8 at addr ffff888015a556b0 by task sshd/220 [ 31.534925] [ 31.535157] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.536051] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.537085] Call Trace: [ 31.537412] [ 31.537710] dump_stack_lvl+0x91/0xf0 [ 31.538220] print_report+0xcc/0x620 [ 31.538753] ? __virt_addr_valid+0x102/0x340 [ 31.539322] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.539958] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.540591] kasan_report+0xbe/0xf0 [ 31.541085] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.541731] vma_interval_tree_remove+0xc75/0xec0 [ 31.542352] vma_prepare+0xc54/0x11a0 [ 31.542863] __split_vma+0x5af/0x950 [ 31.543360] ? __pfx___split_vma+0x10/0x10 [ 31.543913] ? find_held_lock+0x2c/0x110 [ 31.544453] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.545038] ? lock_is_held_type+0x9f/0x120 [ 31.545601] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.546238] ? mtree_range_walk+0x632/0x900 [ 31.546830] ? mas_walk+0x5c7/0x7c0 [ 31.547328] do_vmi_munmap+0x1f1/0x2b0 [ 31.547831] mmap_region+0x1f9/0x2660 [ 31.548337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.548871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.549619] ? __pfx_lock_acquire+0x10/0x10 [ 31.550170] ? __pfx_mmap_region+0x10/0x10 [ 31.550747] ? security_mmap_addr+0x7d/0xa0 [ 31.551297] ? get_unmapped_area+0x1f5/0x3f0 [ 31.551866] do_mmap+0x854/0xf00 [ 31.552325] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.552841] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.553426] ksys_mmap_pgoff+0x3af/0x500 [ 31.553952] do_syscall_64+0x3f/0x90 [ 31.554449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.555148] RIP: 0033:0x7ff888547d82 [ 31.555627] 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 [ 31.557849] RSP: 002b:00007fff8f997868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.558827] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff888547d82 [ 31.559702] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff887981000 [ 31.560556] RBP: 00007ff887981000 R08: 0000000000000009 R09: 0000000000001000 [ 31.561399] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f086a3f70 [ 31.562245] R13: 00007fff8f997880 R14: 00007fff8f9978b0 R15: 00007fff8f997c10 [ 31.563122] [ 31.563414] [ 31.563631] Allocated by task 213: [ 31.564064] kasan_save_stack+0x22/0x50 [ 31.564565] kasan_set_track+0x25/0x30 [ 31.565067] __kasan_slab_alloc+0x59/0x70 [ 31.565609] kmem_cache_alloc+0x16b/0x370 [ 31.566125] vm_area_dup+0x20/0x160 [ 31.566591] __split_vma+0x170/0x950 [ 31.567075] split_vma+0xc6/0x110 [ 31.567518] mprotect_fixup+0x8d2/0xb30 [ 31.568038] do_mprotect_pkey+0x87e/0xd40 [ 31.568563] __x64_sys_mprotect+0x78/0xc0 [ 31.569085] do_syscall_64+0x3f/0x90 [ 31.569558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.570209] [ 31.570424] Freed by task 213: [ 31.570833] kasan_save_stack+0x22/0x50 [ 31.571346] kasan_set_track+0x25/0x30 [ 31.571842] kasan_save_free_info+0x2b/0x50 [ 31.572372] __kasan_slab_free+0x10a/0x190 [ 31.572912] kmem_cache_free+0x10d/0x4d0 [ 31.573423] rcu_core+0x8c8/0x2860 [ 31.573870] __do_softirq+0x1b7/0x7d4 [ 31.574347] [ 31.574572] Last potentially related work creation: [ 31.575165] kasan_save_stack+0x22/0x50 [ 31.575667] __kasan_record_aux_stack+0x8e/0xa0 [ 31.576262] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.576945] remove_vma+0x139/0x170 [ 31.577435] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.578021] do_vmi_munmap+0x1f1/0x2b0 [ 31.578559] __vm_munmap+0x138/0x3a0 [ 31.579065] __x64_sys_munmap+0x59/0x80 [ 31.579600] do_syscall_64+0x3f/0x90 [ 31.580099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.580786] [ 31.581018] The buggy address belongs to the object at ffff888015a55658 [ 31.581018] which belongs to the cache vm_area_struct of size 168 [ 31.582619] The buggy address is located 88 bytes inside of [ 31.582619] freed 168-byte region [ffff888015a55658, ffff888015a55700) [ 31.584124] [ 31.584354] The buggy address belongs to the physical page: [ 31.585067] page:00000000d8c659dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a55 [ 31.586226] memcg:ffff88800e0c5401 [ 31.586688] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.587428] page_type: 0xffffffff() [ 31.587915] raw: 0100000000000200 ffff8880087a0c80 ffffea0000330440 dead000000000003 [ 31.588905] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0c5401 [ 31.589884] page dumped because: kasan: bad access detected [ 31.590608] [ 31.590838] Memory state around the buggy address: [ 31.591458] ffff888015a55580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.592384] ffff888015a55600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.593307] >ffff888015a55680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.594221] ^ [ 31.594856] ffff888015a55700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.595765] ffff888015a55780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.596687] ================================================================== [ 31.597729] Disabling lock debugging due to kernel taint [ 33.547205] BUG: Bad rss-counter state mm:0000000048147a87 type:MM_FILEPAGES val:33 [ 33.548391] BUG: Bad rss-counter state mm:0000000048147a87 type:MM_ANONPAGES val:22 [ 33.952259] BUG: Bad rss-counter state mm:00000000459b7e77 type:MM_FILEPAGES val:33 [ 33.953271] BUG: Bad rss-counter state mm:00000000459b7e77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12411' (ECDSA) to the list of known hosts. 2023/06/20 23:58:17 fuzzer started 2023/06/20 23:58:17 dialing manager at localhost:36067 2023/06/20 23:58:17 checking machine... 2023/06/20 23:58:17 checking revisions... [ 34.714028] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:58:17 testing simple program... [ 34.784721] cgroup: Unknown subsys name 'net' [ 34.821728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:58:17 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff81ed7282 RDX=000000000000ed72 RSI=000000000000ed72 RDI=ffffffff86524fb8 RBP=ffff88800fd47a20 RSP=ffff88800fd47958 R8 =0000000000000000 R9 =ffff88800fd47a08 R10=0000000000038001 R11=000000000003835b R12=ffff88800fd47a28 R13=ffff88800fd47a10 R14=ffff88800fd47a09 R15=ffff88800fd479c8 RIP=ffffffff811307c2 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 00007f5afbc6c900 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=00007f5afbc2001c CR3=000000001459c000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e0d1c0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e37e01 RSI=ffff888008e37ef0 RDI=ffff888008e37ef0 RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =0000000000000001 R9 =ffff888008e379b8 R10=0000000000038001 R11=000000000000a20c R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e37ef0 R15=ffff888008e37978 RIP=ffffffff81131236 RFL=00000202 [-------] 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 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=00007ffdc9d93c68 CR3=0000000019cb8000 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=2036313a38353a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a38353a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000