syzkaller login: [ 30.664242] BUG: Bad rss-counter state mm:00000000c6e6585c type:MM_FILEPAGES val:33 [ 30.665440] BUG: Bad rss-counter state mm:00000000c6e6585c type:MM_ANONPAGES val:22 [ 30.706905] ================================================================== [ 30.708173] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.709529] Read of size 8 at addr ffff88800cca56b0 by task sshd/220 [ 30.710667] [ 30.711002] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.712232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.713693] Call Trace: [ 30.714190] [ 30.714634] dump_stack_lvl+0x91/0xf0 [ 30.715365] print_report+0xcc/0x620 [ 30.716120] ? __virt_addr_valid+0x102/0x340 [ 30.716988] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.717919] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718760] kasan_report+0xbe/0xf0 [ 30.719521] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.720359] vma_interval_tree_remove+0xc75/0xec0 [ 30.721175] vma_prepare+0xc54/0x11a0 [ 30.721820] __split_vma+0x5af/0x950 [ 30.722480] ? __pfx___split_vma+0x10/0x10 [ 30.723192] ? find_held_lock+0x2c/0x110 [ 30.723898] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.724653] ? lock_is_held_type+0x9f/0x120 [ 30.725380] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.726206] ? mtree_range_walk+0x632/0x900 [ 30.726945] ? mas_walk+0x5c7/0x7c0 [ 30.727583] do_vmi_munmap+0x1f1/0x2b0 [ 30.728253] mmap_region+0x1f9/0x2660 [ 30.728902] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.729594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.730561] ? __pfx_lock_acquire+0x10/0x10 [ 30.731271] ? __pfx_mmap_region+0x10/0x10 [ 30.731979] ? security_mmap_addr+0x7d/0xa0 [ 30.732702] ? get_unmapped_area+0x1f5/0x3f0 [ 30.733443] do_mmap+0x854/0xf00 [ 30.734028] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.734717] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.735480] ksys_mmap_pgoff+0x3af/0x500 [ 30.736160] do_syscall_64+0x3f/0x90 [ 30.736799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.737667] RIP: 0033:0x7fc3e61f8d82 [ 30.738291] 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 [ 30.741127] RSP: 002b:00007ffe2626f128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.742303] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3e61f8d82 [ 30.743163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3e5632000 [ 30.744013] RBP: 00007fc3e5632000 R08: 0000000000000009 R09: 0000000000001000 [ 30.744858] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba403a2f70 [ 30.745700] R13: 00007ffe2626f140 R14: 00007ffe2626f170 R15: 00007ffe2626f4d0 [ 30.746566] [ 30.746858] [ 30.747071] Allocated by task 213: [ 30.747501] kasan_save_stack+0x22/0x50 [ 30.748005] kasan_set_track+0x25/0x30 [ 30.748496] __kasan_slab_alloc+0x59/0x70 [ 30.749021] kmem_cache_alloc+0x16b/0x370 [ 30.749548] vm_area_dup+0x20/0x160 [ 30.750001] __split_vma+0x170/0x950 [ 30.750472] split_vma+0xc6/0x110 [ 30.750905] mprotect_fixup+0x8d2/0xb30 [ 30.751411] do_mprotect_pkey+0x87e/0xd40 [ 30.751995] __x64_sys_mprotect+0x78/0xc0 [ 30.752514] do_syscall_64+0x3f/0x90 [ 30.752985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.753624] [ 30.753838] Freed by task 203: [ 30.754244] kasan_save_stack+0x22/0x50 [ 30.754753] kasan_set_track+0x25/0x30 [ 30.755246] kasan_save_free_info+0x2b/0x50 [ 30.755781] __kasan_slab_free+0x10a/0x190 [ 30.756317] kmem_cache_free+0x10d/0x4d0 [ 30.756820] rcu_core+0x8c8/0x2860 [ 30.757269] __do_softirq+0x1b7/0x7d4 [ 30.757748] [ 30.757967] Last potentially related work creation: [ 30.758558] kasan_save_stack+0x22/0x50 [ 30.759060] __kasan_record_aux_stack+0x8e/0xa0 [ 30.759630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.760274] remove_vma+0x139/0x170 [ 30.760722] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.761273] do_vmi_munmap+0x1f1/0x2b0 [ 30.761759] __vm_munmap+0x138/0x3a0 [ 30.762233] __x64_sys_munmap+0x59/0x80 [ 30.762723] do_syscall_64+0x3f/0x90 [ 30.763201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.763847] [ 30.764060] The buggy address belongs to the object at ffff88800cca5658 [ 30.764060] which belongs to the cache vm_area_struct of size 168 [ 30.765532] The buggy address is located 88 bytes inside of [ 30.765532] freed 168-byte region [ffff88800cca5658, ffff88800cca5700) [ 30.766958] [ 30.767172] The buggy address belongs to the physical page: [ 30.767829] page:000000003fa675fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcca5 [ 30.768923] memcg:ffff88800ed8ad01 [ 30.769351] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.770000] page_type: 0xffffffff() [ 30.770454] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.771366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed8ad01 [ 30.772272] page dumped because: kasan: bad access detected [ 30.772933] [ 30.773150] Memory state around the buggy address: [ 30.773730] ffff88800cca5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.774601] ffff88800cca5600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.775463] >ffff88800cca5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.776313] ^ [ 30.776895] ffff88800cca5700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.777754] ffff88800cca5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.778614] ================================================================== [ 30.779656] Disabling lock debugging due to kernel taint [ 32.640532] BUG: Bad rss-counter state mm:0000000038e03eed type:MM_FILEPAGES val:33 [ 32.641774] BUG: Bad rss-counter state mm:0000000038e03eed type:MM_ANONPAGES val:22 [ 33.129684] BUG: Bad rss-counter state mm:00000000688045de type:MM_FILEPAGES val:33 [ 33.130948] BUG: Bad rss-counter state mm:00000000688045de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59801' (ECDSA) to the list of known hosts. 2023/06/20 13:10:46 fuzzer started 2023/06/20 13:10:46 dialing manager at localhost:36067 2023/06/20 13:10:46 checking machine... 2023/06/20 13:10:46 checking revisions... [ 33.824043] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:10:46 testing simple program... [ 33.868452] cgroup: Unknown subsys name 'net' [ 33.935304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:10:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9fa18 RCX=0000000000000001 RDX=1ffff110011b3f5a RSI=ffffffff8100455c RDI=ffff888008d9fa24 RBP=ffff888008d9fad0 RSP=ffff888008d9f930 R8 =0000000000000001 R9 =ffff888008d9f990 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008d9fa18 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800d052e60 RIP=ffffffff813ad547 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 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=00007f28d39550b0 CR3=000000000dd44000 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=30313a3331203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303233 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff813782c0 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806cf09e68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=1ffff1100d9e7479 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff88800ef90080 RIP=ffffffff81378942 RFL=00000286 [--S--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 00007f28d339d900 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=00007fff3deed000 CR3=000000001c9dc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000