syzkaller login: [ 108.512949] BUG: Bad rss-counter state mm:000000004a017bd9 type:MM_FILEPAGES val:33 [ 108.514826] BUG: Bad rss-counter state mm:000000004a017bd9 type:MM_ANONPAGES val:22 [ 108.667230] ================================================================== [ 108.668126] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 108.669056] Read of size 8 at addr ffff88800e0abd08 by task sshd/219 [ 108.669838] [ 108.670060] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 108.671275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 108.672240] Call Trace: [ 108.672553] [ 108.672832] dump_stack_lvl+0x91/0xf0 [ 108.673461] print_report+0xcc/0x620 [ 108.674052] ? __virt_addr_valid+0x102/0x340 [ 108.674711] ? vma_interval_tree_remove+0xc75/0xec0 [ 108.675443] ? vma_interval_tree_remove+0xc75/0xec0 [ 108.676172] kasan_report+0xbe/0xf0 [ 108.676732] ? vma_interval_tree_remove+0xc75/0xec0 [ 108.677471] vma_interval_tree_remove+0xc75/0xec0 [ 108.678208] vma_prepare+0xc54/0x11a0 [ 108.678730] __split_vma+0x5af/0x950 [ 108.679192] ? __pfx___split_vma+0x10/0x10 [ 108.679711] ? find_held_lock+0x2c/0x110 [ 108.680234] do_vmi_align_munmap+0x2ba/0x11f0 [ 108.680786] ? lock_is_held_type+0x9f/0x120 [ 108.681322] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 108.681929] ? mtree_range_walk+0x632/0x900 [ 108.682476] ? mas_walk+0x5c7/0x7c0 [ 108.682944] do_vmi_munmap+0x1f1/0x2b0 [ 108.683438] mmap_region+0x1f9/0x2660 [ 108.683916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 108.684421] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 108.685131] ? __pfx_lock_acquire+0x10/0x10 [ 108.685676] ? __pfx_mmap_region+0x10/0x10 [ 108.686223] ? security_mmap_addr+0x7d/0xa0 [ 108.686743] ? get_unmapped_area+0x1f5/0x3f0 [ 108.687295] do_mmap+0x854/0xf00 [ 108.687732] vm_mmap_pgoff+0x1a6/0x3a0 [ 108.688239] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 108.688793] ksys_mmap_pgoff+0x3af/0x500 [ 108.689292] do_syscall_64+0x3f/0x90 [ 108.689766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 108.690399] RIP: 0033:0x7ff25daf6d82 [ 108.690849] 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 [ 108.692943] RSP: 002b:00007ffefd22c6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 108.693845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff25daf6d82 [ 108.694693] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff25cf30000 [ 108.695547] RBP: 00007ff25cf30000 R08: 0000000000000009 R09: 0000000000001000 [ 108.696391] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd58c1cf70 [ 108.697221] R13: 00007ffefd22c710 R14: 00007ffefd22c740 R15: 00007ffefd22caa0 [ 108.698104] [ 108.698395] [ 108.698610] Allocated by task 212: [ 108.699040] kasan_save_stack+0x22/0x50 [ 108.699538] kasan_set_track+0x25/0x30 [ 108.700042] __kasan_slab_alloc+0x59/0x70 [ 108.700571] kmem_cache_alloc+0x16b/0x370 [ 108.701084] vm_area_dup+0x20/0x160 [ 108.701539] __split_vma+0x170/0x950 [ 108.702006] split_vma+0xc6/0x110 [ 108.702453] mprotect_fixup+0x8d2/0xb30 [ 108.702949] do_mprotect_pkey+0x87e/0xd40 [ 108.703472] __x64_sys_mprotect+0x78/0xc0 [ 108.703989] do_syscall_64+0x3f/0x90 [ 108.704453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 108.705091] [ 108.705301] Freed by task 212: [ 108.705688] kasan_save_stack+0x22/0x50 [ 108.706213] kasan_set_track+0x25/0x30 [ 108.706698] kasan_save_free_info+0x2b/0x50 [ 108.707222] __kasan_slab_free+0x10a/0x190 [ 108.707750] kmem_cache_free+0x10d/0x4d0 [ 108.708257] rcu_core+0x8c8/0x2860 [ 108.708695] __do_softirq+0x1b7/0x7d4 [ 108.709169] [ 108.709383] Last potentially related work creation: [ 108.709969] kasan_save_stack+0x22/0x50 [ 108.710470] __kasan_record_aux_stack+0x8e/0xa0 [ 108.711034] __call_rcu_common.constprop.0+0x6a/0xb90 [ 108.711671] remove_vma+0x139/0x170 [ 108.712109] do_vmi_align_munmap+0xd4a/0x11f0 [ 108.712776] do_vmi_munmap+0x1f1/0x2b0 [ 108.713257] __vm_munmap+0x138/0x3a0 [ 108.713736] __x64_sys_munmap+0x59/0x80 [ 108.714225] do_syscall_64+0x3f/0x90 [ 108.714690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 108.715319] [ 108.715534] Second to last potentially related work creation: [ 108.716223] kasan_save_stack+0x22/0x50 [ 108.716723] __kasan_record_aux_stack+0x8e/0xa0 [ 108.717282] __call_rcu_common.constprop.0+0x6a/0xb90 [ 108.717927] remove_vma+0x139/0x170 [ 108.718371] do_vmi_align_munmap+0xd4a/0x11f0 [ 108.718935] do_vmi_munmap+0x1f1/0x2b0 [ 108.719423] mmap_region+0x1f9/0x2660 [ 108.719890] do_mmap+0x854/0xf00 [ 108.720318] vm_mmap_pgoff+0x1a6/0x3a0 [ 108.720807] ksys_mmap_pgoff+0x3af/0x500 [ 108.721304] do_syscall_64+0x3f/0x90 [ 108.721776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 108.722409] [ 108.722625] The buggy address belongs to the object at ffff88800e0abcb0 [ 108.722625] which belongs to the cache vm_area_struct of size 168 [ 108.724088] The buggy address is located 88 bytes inside of [ 108.724088] freed 168-byte region [ffff88800e0abcb0, ffff88800e0abd58) [ 108.725486] [ 108.725702] The buggy address belongs to the physical page: [ 108.726367] page:00000000a14d51ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0ab [ 108.727431] memcg:ffff88800e043901 [ 108.727848] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 108.728536] page_type: 0xffffffff() [ 108.728977] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 108.729920] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e043901 [ 108.730810] page dumped because: kasan: bad access detected [ 108.731470] [ 108.731686] Memory state around the buggy address: [ 108.732261] ffff88800e0abc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 108.733107] ffff88800e0abc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 108.733952] >ffff88800e0abd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 108.734790] ^ [ 108.735229] ffff88800e0abd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 108.736085] ffff88800e0abe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 108.736920] ================================================================== [ 108.737939] Disabling lock debugging due to kernel taint [ 110.565078] BUG: Bad rss-counter state mm:00000000e52e77c5 type:MM_FILEPAGES val:33 [ 110.565919] BUG: Bad rss-counter state mm:00000000e52e77c5 type:MM_ANONPAGES val:22 [ 111.031888] BUG: Bad rss-counter state mm:000000003dac4c2e type:MM_FILEPAGES val:33 [ 111.033045] BUG: Bad rss-counter state mm:000000003dac4c2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11104' (ECDSA) to the list of known hosts. 2023/06/19 20:49:56 fuzzer started 2023/06/19 20:49:56 dialing manager at localhost:44161 2023/06/19 20:49:56 checking machine... 2023/06/19 20:49:56 checking revisions... [ 111.745392] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:49:56 testing simple program... [ 111.798206] cgroup: Unknown subsys name 'net' [ 111.838609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:48:46 Registers: info registers vcpu 0 RAX=1ffff110027790ab RBX=ffff888013bc8528 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888013bc8558 RBP=ffff8880137438c0 RSP=ffff8880178dfd18 R8 =0000000000000001 R9 =ffffed1002f1bf97 R10=0000000000000003 R11=0000000000000001 R12=dffffc0000000000 R13=ffff888016b59100 R14=ffffffff81893972 R15=dffffc0000000000 RIP=ffffffff81846362 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 00007f726e171900 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=00007fff288d1000 CR3=000000000f0ce000 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=39343a3032203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323738 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f0f48593830 CR3=000000000c7ae000 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=36990be7fa73ae81c446ae0884688954 XMM02=2c67c8bc2e329bc30000000000129528 XMM03=fb795ef6d65770560000000000130280 XMM04=d4aff698617eedfe00000000000ae988 XMM05=19e9129bd510f23500000000001416a8 XMM06=e744f9193b043bc8000000000013f718 XMM07=e042d86d42eb936e0000000000130558 XMM08=5d0ee5ff42a8e2870000000000129588 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000