syzkaller login: [ 30.080101] BUG: Bad rss-counter state mm:000000001ab83699 type:MM_FILEPAGES val:33 [ 30.081950] BUG: Bad rss-counter state mm:000000001ab83699 type:MM_ANONPAGES val:22 [ 30.249078] ================================================================== [ 30.250001] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.250959] Read of size 8 at addr ffff88800efdbed8 by task sshd/220 [ 30.251733] [ 30.251958] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.252951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.253979] Call Trace: [ 30.254303] [ 30.254596] dump_stack_lvl+0x91/0xf0 [ 30.255112] print_report+0xcc/0x620 [ 30.255605] ? __virt_addr_valid+0x102/0x340 [ 30.256169] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.256851] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.257474] kasan_report+0xbe/0xf0 [ 30.258010] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.258662] vma_interval_tree_remove+0xc75/0xec0 [ 30.259292] vma_prepare+0xc54/0x11a0 [ 30.259784] __split_vma+0x5af/0x950 [ 30.260289] ? __pfx___split_vma+0x10/0x10 [ 30.260833] ? find_held_lock+0x2c/0x110 [ 30.261364] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.261956] ? lock_is_held_type+0x9f/0x120 [ 30.262505] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.263120] ? mtree_range_walk+0x632/0x900 [ 30.263678] ? mas_walk+0x5c7/0x7c0 [ 30.264164] do_vmi_munmap+0x1f1/0x2b0 [ 30.264671] mmap_region+0x1f9/0x2660 [ 30.265161] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.265681] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.266420] ? __pfx_lock_acquire+0x10/0x10 [ 30.266961] ? __pfx_mmap_region+0x10/0x10 [ 30.267502] ? security_mmap_addr+0x7d/0xa0 [ 30.268044] ? get_unmapped_area+0x1f5/0x3f0 [ 30.268603] do_mmap+0x854/0xf00 [ 30.269051] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.269556] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.270138] ksys_mmap_pgoff+0x3af/0x500 [ 30.270655] do_syscall_64+0x3f/0x90 [ 30.271146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.271810] RIP: 0033:0x7fd1eefead82 [ 30.272272] 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 [ 30.274448] RSP: 002b:00007ffcae572a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.275372] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1eefead82 [ 30.276233] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1ee424000 [ 30.277089] RBP: 00007fd1ee424000 R08: 0000000000000009 R09: 0000000000001000 [ 30.277965] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647b6ad9980 [ 30.278827] R13: 00007ffcae572a60 R14: 00007ffcae572a90 R15: 00007ffcae572df0 [ 30.279707] [ 30.280001] [ 30.280222] Allocated by task 213: [ 30.280655] kasan_save_stack+0x22/0x50 [ 30.281166] kasan_set_track+0x25/0x30 [ 30.281666] __kasan_slab_alloc+0x59/0x70 [ 30.282222] kmem_cache_alloc+0x16b/0x370 [ 30.282746] vm_area_dup+0x20/0x160 [ 30.283205] __split_vma+0x170/0x950 [ 30.283676] split_vma+0xc6/0x110 [ 30.284120] mprotect_fixup+0x8d2/0xb30 [ 30.284625] do_mprotect_pkey+0x87e/0xd40 [ 30.285150] __x64_sys_mprotect+0x78/0xc0 [ 30.285674] do_syscall_64+0x3f/0x90 [ 30.286168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.286814] [ 30.287033] Freed by task 200: [ 30.287439] kasan_save_stack+0x22/0x50 [ 30.287951] kasan_set_track+0x25/0x30 [ 30.288450] kasan_save_free_info+0x2b/0x50 [ 30.288992] __kasan_slab_free+0x10a/0x190 [ 30.289535] kmem_cache_free+0x10d/0x4d0 [ 30.290071] rcu_core+0x8c8/0x2860 [ 30.290525] __do_softirq+0x1b7/0x7d4 [ 30.291006] [ 30.291223] Last potentially related work creation: [ 30.291820] kasan_save_stack+0x22/0x50 [ 30.292330] __kasan_record_aux_stack+0x8e/0xa0 [ 30.292916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.293571] remove_vma+0x139/0x170 [ 30.294100] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.294686] do_vmi_munmap+0x1f1/0x2b0 [ 30.295189] __vm_munmap+0x138/0x3a0 [ 30.295664] __x64_sys_munmap+0x59/0x80 [ 30.296167] do_syscall_64+0x3f/0x90 [ 30.296657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.297316] [ 30.297537] The buggy address belongs to the object at ffff88800efdbe80 [ 30.297537] which belongs to the cache vm_area_struct of size 168 [ 30.299075] The buggy address is located 88 bytes inside of [ 30.299075] freed 168-byte region [ffff88800efdbe80, ffff88800efdbf28) [ 30.300519] [ 30.300743] The buggy address belongs to the physical page: [ 30.301415] page:000000006dd1cc89 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefdb [ 30.302540] memcg:ffff888009723001 [ 30.302987] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.303711] page_type: 0xffffffff() [ 30.304251] raw: 0100000000000200 ffff8880087a0c80 ffffea0000405a00 dead000000000007 [ 30.305212] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009723001 [ 30.306146] page dumped because: kasan: bad access detected [ 30.306810] [ 30.307031] Memory state around the buggy address: [ 30.307615] ffff88800efdbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.308488] ffff88800efdbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.309360] >ffff88800efdbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.310250] ^ [ 30.310993] ffff88800efdbf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.311867] ffff88800efdbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.312718] ================================================================== [ 30.313704] Disabling lock debugging due to kernel taint [ 32.299667] BUG: Bad rss-counter state mm:00000000b1a678f8 type:MM_FILEPAGES val:33 [ 32.300671] BUG: Bad rss-counter state mm:00000000b1a678f8 type:MM_ANONPAGES val:22 [ 32.748029] BUG: Bad rss-counter state mm:000000000d4fc6bb type:MM_FILEPAGES val:33 [ 32.748955] BUG: Bad rss-counter state mm:000000000d4fc6bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54214' (ECDSA) to the list of known hosts. 2023/06/20 17:51:36 fuzzer started 2023/06/20 17:51:37 dialing manager at localhost:36067 2023/06/20 17:51:37 checking machine... 2023/06/20 17:51:37 checking revisions... [ 33.458403] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:51:37 testing simple program... [ 33.498930] cgroup: Unknown subsys name 'net' [ 33.539725] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:51:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8120686e RDX=0000000000002069 RSI=0000000000002068 RDI=ffffffff864f1b94 RBP=ffff888008d9f988 RSP=ffff888008d9f8c0 R8 =0000000000000000 R9 =ffff888008d9f970 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008d9f990 R13=ffff888008d9f978 R14=ffff888008d9f971 R15=ffff888008d9f930 RIP=ffffffff811307e3 RFL=00000217 [----APC] 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=00007f117eb6f0b0 CR3=000000000e84e000 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=31353a3731203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383936 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fe6f367f270 CR3=000000000f286000 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=202d40b08fec4e990949a53f413eccbe XMM02=2c67c8bc2e329bc3000000000011a918 XMM03=fb795ef6d65770560000000000121a88 XMM04=1acbfc49aabf2ecb00000000000ae988 XMM05=19e9129bd510f2350000000000131908 XMM06=24e0d14fab5856020000000000130770 XMM07=e042d86d42eb936e0000000000121d08 XMM08=336ed0826662ac70000000000011a978 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000