syzkaller login: [ 30.702076] BUG: Bad rss-counter state mm:000000004d013c88 type:MM_FILEPAGES val:33 [ 30.703089] BUG: Bad rss-counter state mm:000000004d013c88 type:MM_ANONPAGES val:22 [ 30.867123] ================================================================== [ 30.868033] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.868982] Read of size 8 at addr ffff88800e04d880 by task sshd/220 [ 30.869754] [ 30.869974] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.870947] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.871924] Call Trace: [ 30.872242] [ 30.872526] dump_stack_lvl+0x91/0xf0 [ 30.873048] print_report+0xcc/0x620 [ 30.873534] ? __virt_addr_valid+0x102/0x340 [ 30.874097] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.874713] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.875335] kasan_report+0xbe/0xf0 [ 30.875810] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.876429] vma_interval_tree_remove+0xc75/0xec0 [ 30.877058] vma_prepare+0xc54/0x11a0 [ 30.877537] __split_vma+0x5af/0x950 [ 30.878007] ? __pfx___split_vma+0x10/0x10 [ 30.878534] ? find_held_lock+0x2c/0x110 [ 30.879057] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.879626] ? lock_is_held_type+0x9f/0x120 [ 30.880168] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.880780] ? mtree_range_walk+0x632/0x900 [ 30.881337] ? mas_walk+0x5c7/0x7c0 [ 30.881816] do_vmi_munmap+0x1f1/0x2b0 [ 30.882311] mmap_region+0x1f9/0x2660 [ 30.882794] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.883305] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.884018] ? __pfx_lock_acquire+0x10/0x10 [ 30.884551] ? __pfx_mmap_region+0x10/0x10 [ 30.885099] ? security_mmap_addr+0x7d/0xa0 [ 30.885631] ? get_unmapped_area+0x1f5/0x3f0 [ 30.886178] do_mmap+0x854/0xf00 [ 30.886615] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.887114] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.887677] ksys_mmap_pgoff+0x3af/0x500 [ 30.888183] do_syscall_64+0x3f/0x90 [ 30.888664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889326] RIP: 0033:0x7f530bc94d82 [ 30.889779] 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 [ 30.891912] RSP: 002b:00007fffefe5ad28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.892834] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f530bc94d82 [ 30.893681] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f530b0ce000 [ 30.894529] RBP: 00007f530b0ce000 R08: 0000000000000009 R09: 0000000000001000 [ 30.895379] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d4c7072b20 [ 30.896228] R13: 00007fffefe5ad40 R14: 00007fffefe5ad70 R15: 00007fffefe5b0d0 [ 30.897099] [ 30.897398] [ 30.897614] Allocated by task 213: [ 30.898040] kasan_save_stack+0x22/0x50 [ 30.898552] kasan_set_track+0x25/0x30 [ 30.899053] __kasan_slab_alloc+0x59/0x70 [ 30.899582] kmem_cache_alloc+0x16b/0x370 [ 30.900097] vm_area_dup+0x20/0x160 [ 30.900548] __split_vma+0x170/0x950 [ 30.901024] split_vma+0xc6/0x110 [ 30.901470] mprotect_fixup+0x8d2/0xb30 [ 30.901972] do_mprotect_pkey+0x87e/0xd40 [ 30.902497] __x64_sys_mprotect+0x78/0xc0 [ 30.903022] do_syscall_64+0x3f/0x90 [ 30.903501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904148] [ 30.904363] Freed by task 203: [ 30.904763] kasan_save_stack+0x22/0x50 [ 30.905270] kasan_set_track+0x25/0x30 [ 30.905771] kasan_save_free_info+0x2b/0x50 [ 30.906305] __kasan_slab_free+0x10a/0x190 [ 30.906875] kmem_cache_free+0x10d/0x4d0 [ 30.907407] rcu_core+0x8c8/0x2860 [ 30.907874] __do_softirq+0x1b7/0x7d4 [ 30.908368] [ 30.908589] Last potentially related work creation: [ 30.909218] kasan_save_stack+0x22/0x50 [ 30.909742] __kasan_record_aux_stack+0x8e/0xa0 [ 30.910342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.911018] remove_vma+0x139/0x170 [ 30.911492] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.912114] do_vmi_munmap+0x1f1/0x2b0 [ 30.912628] __vm_munmap+0x138/0x3a0 [ 30.913131] __x64_sys_munmap+0x59/0x80 [ 30.913653] do_syscall_64+0x3f/0x90 [ 30.914155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914833] [ 30.915062] The buggy address belongs to the object at ffff88800e04d828 [ 30.915062] which belongs to the cache vm_area_struct of size 168 [ 30.916630] The buggy address is located 88 bytes inside of [ 30.916630] freed 168-byte region [ffff88800e04d828, ffff88800e04d8d0) [ 30.918111] [ 30.918338] The buggy address belongs to the physical page: [ 30.919044] page:000000004be46d0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe04d [ 30.920197] memcg:ffff88800edc6401 [ 30.920657] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.921360] page_type: 0xffffffff() [ 30.921831] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.922811] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edc6401 [ 30.923760] page dumped because: kasan: bad access detected [ 30.924454] [ 30.924679] Memory state around the buggy address: [ 30.925308] ffff88800e04d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.926218] ffff88800e04d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.927134] >ffff88800e04d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.928040] ^ [ 30.928473] ffff88800e04d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.929389] ffff88800e04d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.930295] ================================================================== [ 30.931264] Disabling lock debugging due to kernel taint [ 32.927322] BUG: Bad rss-counter state mm:00000000bf55455b type:MM_FILEPAGES val:33 [ 32.928565] BUG: Bad rss-counter state mm:00000000bf55455b type:MM_ANONPAGES val:22 [ 33.405367] BUG: Bad rss-counter state mm:000000005508590e type:MM_FILEPAGES val:33 [ 33.406383] BUG: Bad rss-counter state mm:000000005508590e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15785' (ECDSA) to the list of known hosts. 2023/06/20 17:47:34 fuzzer started 2023/06/20 17:47:34 dialing manager at localhost:36067 2023/06/20 17:47:34 checking machine... 2023/06/20 17:47:34 checking revisions... [ 34.146492] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:47:34 testing simple program... [ 34.198246] cgroup: Unknown subsys name 'net' [ 34.248695] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:47:34 Registers: info registers vcpu 0 RAX=1ffff11001b71aab RBX=ffff88800db8d528 RCX=1ffff11001b639dc RDX=dffffc0000000000 RSI=ffff88800eeaf120 RDI=ffff88800db8d558 RBP=ffff88800db15668 RSP=ffff8880147376c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800eeaf100 R13=0000000000000000 R14=ffff88800ee52af8 R15=ffff88800ee52ab0 RIP=ffffffff8184767e RFL=00000046 [---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 00007fcd4de4a900 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=00007fcd4d2a37d0 CR3=0000000008cc2000 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=67906907e59807887340fc0f5160323e XMM02=000000000011c420eff9b2d0a8fce9cb XMM03=000000000011c4f02c67c8bc2e329bc3 XMM04=aaeceddd89ccbf1d00000000000ae988 XMM05=576477a289fbd99d0000000000134080 XMM06=e4cb8bb95a7664b60000000000132f18 XMM07=fb795ef6d65770560000000000123160 XMM08=2c67c8bc2e329bc3000000000011c490 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000008 RCX=ffffffff844a4eda RDX=ffff88801016b680 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff888016a3ba08 RSP=ffff888019ec7ce0 R8 =0000000000000006 R9 =00007f322bcf8fff R10=00007ffcc2eae000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000002 R14=00007ffcc2eae000 R15=00007f322bcf8fff RIP=ffffffff814c0860 RFL=00000287 [--S--PC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f322bcc4900 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=00007ffcc2eae000 CR3=000000000e4e8000 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=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=0c286e696d41657420322e322e302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000