syzkaller login: [ 30.701073] BUG: Bad rss-counter state mm:00000000cbff5036 type:MM_FILEPAGES val:33 [ 30.702006] BUG: Bad rss-counter state mm:00000000cbff5036 type:MM_ANONPAGES val:22 [ 30.868604] ================================================================== [ 30.869644] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.870753] Read of size 8 at addr ffff888015e37a50 by task sshd/220 [ 30.871719] [ 30.871932] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.872750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.873680] Call Trace: [ 30.873983] [ 30.874251] dump_stack_lvl+0x91/0xf0 [ 30.874739] print_report+0xcc/0x620 [ 30.875202] ? __virt_addr_valid+0x102/0x340 [ 30.875722] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.876303] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.876880] kasan_report+0xbe/0xf0 [ 30.877331] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.877919] vma_interval_tree_remove+0xc75/0xec0 [ 30.878491] vma_prepare+0xc54/0x11a0 [ 30.878976] __split_vma+0x5af/0x950 [ 30.879425] ? __pfx___split_vma+0x10/0x10 [ 30.879933] ? find_held_lock+0x2c/0x110 [ 30.880429] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.880976] ? lock_is_held_type+0x9f/0x120 [ 30.881493] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.882070] ? mtree_range_walk+0x632/0x900 [ 30.882602] ? mas_walk+0x5c7/0x7c0 [ 30.883075] do_vmi_munmap+0x1f1/0x2b0 [ 30.883537] mmap_region+0x1f9/0x2660 [ 30.883994] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.884476] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.885152] ? __pfx_lock_acquire+0x10/0x10 [ 30.885650] ? __pfx_mmap_region+0x10/0x10 [ 30.886152] ? security_mmap_addr+0x7d/0xa0 [ 30.886656] ? get_unmapped_area+0x1f5/0x3f0 [ 30.887184] do_mmap+0x854/0xf00 [ 30.887612] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.888084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.888633] ksys_mmap_pgoff+0x3af/0x500 [ 30.889124] do_syscall_64+0x3f/0x90 [ 30.889593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.890212] RIP: 0033:0x7f5901562d82 [ 30.890672] 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 [ 30.892704] RSP: 002b:00007fff04e58648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.893573] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5901562d82 [ 30.894382] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f590099c000 [ 30.895219] RBP: 00007f590099c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.896048] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615c8733f70 [ 30.896856] R13: 00007fff04e58660 R14: 00007fff04e58690 R15: 00007fff04e589f0 [ 30.897682] [ 30.897971] [ 30.898177] Allocated by task 213: [ 30.898599] kasan_save_stack+0x22/0x50 [ 30.899107] kasan_set_track+0x25/0x30 [ 30.899576] __kasan_slab_alloc+0x59/0x70 [ 30.900079] kmem_cache_alloc+0x16b/0x370 [ 30.900578] vm_area_dup+0x20/0x160 [ 30.901021] __split_vma+0x170/0x950 [ 30.901470] split_vma+0xc6/0x110 [ 30.901888] mprotect_fixup+0x8d2/0xb30 [ 30.902371] do_mprotect_pkey+0x87e/0xd40 [ 30.902886] __x64_sys_mprotect+0x78/0xc0 [ 30.903385] do_syscall_64+0x3f/0x90 [ 30.903842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904465] [ 30.904675] Freed by task 213: [ 30.905055] kasan_save_stack+0x22/0x50 [ 30.905548] kasan_set_track+0x25/0x30 [ 30.906025] kasan_save_free_info+0x2b/0x50 [ 30.906538] __kasan_slab_free+0x10a/0x190 [ 30.907056] kmem_cache_free+0x10d/0x4d0 [ 30.907555] rcu_core+0x8c8/0x2860 [ 30.907983] __do_softirq+0x1b7/0x7d4 [ 30.908443] [ 30.908659] Last potentially related work creation: [ 30.909226] kasan_save_stack+0x22/0x50 [ 30.909707] __kasan_record_aux_stack+0x8e/0xa0 [ 30.910259] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.910896] remove_vma+0x139/0x170 [ 30.911337] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.911885] do_vmi_munmap+0x1f1/0x2b0 [ 30.912428] __vm_munmap+0x138/0x3a0 [ 30.912888] __x64_sys_munmap+0x59/0x80 [ 30.913362] do_syscall_64+0x3f/0x90 [ 30.913824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914437] [ 30.914661] The buggy address belongs to the object at ffff888015e379f8 [ 30.914661] which belongs to the cache vm_area_struct of size 168 [ 30.916087] The buggy address is located 88 bytes inside of [ 30.916087] freed 168-byte region [ffff888015e379f8, ffff888015e37aa0) [ 30.917454] [ 30.917659] The buggy address belongs to the physical page: [ 30.918292] page:000000001c2fc5d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e37 [ 30.919344] memcg:ffff88800d7c0901 [ 30.919758] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.920375] page_type: 0xffffffff() [ 30.920810] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.921702] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7c0901 [ 30.922572] page dumped because: kasan: bad access detected [ 30.923245] [ 30.923452] Memory state around the buggy address: [ 30.924005] ffff888015e37900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.924816] ffff888015e37980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.925635] >ffff888015e37a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.926456] ^ [ 30.927148] ffff888015e37a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.927973] ffff888015e37b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.928781] ================================================================== [ 30.929675] Disabling lock debugging due to kernel taint [ 32.310882] BUG: Bad rss-counter state mm:00000000df2c03fb type:MM_FILEPAGES val:183 [ 32.312013] BUG: Bad rss-counter state mm:00000000df2c03fb type:MM_ANONPAGES val:50 [ 33.268350] BUG: Bad rss-counter state mm:00000000e782dc41 type:MM_FILEPAGES val:33 [ 33.269551] BUG: Bad rss-counter state mm:00000000e782dc41 type:MM_ANONPAGES val:22 [ 33.731947] BUG: Bad rss-counter state mm:000000005ecafed8 type:MM_FILEPAGES val:33 [ 33.733186] BUG: Bad rss-counter state mm:000000005ecafed8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6459' (ECDSA) to the list of known hosts. 2023/06/21 00:17:03 fuzzer started 2023/06/21 00:17:03 dialing manager at localhost:36067 2023/06/21 00:17:03 checking machine... 2023/06/21 00:17:03 checking revisions... [ 34.383630] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:17:03 testing simple program... [ 34.427439] cgroup: Unknown subsys name 'net' [ 34.470390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:17:03 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffff888019b7a068 RCX=ffffffff81b2883a RDX=0000000000000004 RSI=0000000000000004 RDI=0000000000000005 RBP=ffff888019b79db8 RSP=ffff8880094cf718 R8 =0000000000000005 R9 =0000000000000004 R10=0000000000000004 R11=0000000000000000 R12=ffff888018d8bb00 R13=ffff88800f8fe000 R14=ffff88800f8fe738 R15=ffff8880094cf790 RIP=ffffffff814c0250 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 00007f7002ef0700 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=00007fe4516b50b0 CR3=000000000e874000 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=2032303a37313a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a37313a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fb84185df30 CR3=000000000c77a000 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=4f797252cd51829bba49ee244c16b9af XMM02=2c67c8bc2e329bc3000000000011a198 XMM03=fb795ef6d65770560000000000121848 XMM04=61eab618677b015000000000000ae988 XMM05=e7a3b750822471340000000000132eb8 XMM06=f05052a67f51faed0000000000131f50 XMM07=e042d86d42eb936e0000000000121ac8 XMM08=69edb51bb8dca10e000000000011a1f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000