syzkaller login: [ 33.846439] BUG: Bad rss-counter state mm:000000005485db7c type:MM_FILEPAGES val:33 [ 33.847993] BUG: Bad rss-counter state mm:000000005485db7c type:MM_ANONPAGES val:22 [ 33.888695] ================================================================== [ 33.889599] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.890558] Read of size 8 at addr ffff88800da3aa50 by task sshd/222 [ 33.891341] [ 33.891566] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.892441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.893429] Call Trace: [ 33.893759] [ 33.894045] dump_stack_lvl+0x91/0xf0 [ 33.894540] print_report+0xcc/0x620 [ 33.895033] ? __virt_addr_valid+0x102/0x340 [ 33.895591] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.896229] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.896864] kasan_report+0xbe/0xf0 [ 33.897339] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.897969] vma_interval_tree_remove+0xc75/0xec0 [ 33.898586] vma_prepare+0xc54/0x11a0 [ 33.899106] __split_vma+0x5af/0x950 [ 33.899602] ? __pfx___split_vma+0x10/0x10 [ 33.900155] ? find_held_lock+0x2c/0x110 [ 33.900691] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.901287] ? lock_is_held_type+0x9f/0x120 [ 33.901845] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.902484] ? mtree_range_walk+0x632/0x900 [ 33.903074] ? mas_walk+0x5c7/0x7c0 [ 33.903564] do_vmi_munmap+0x1f1/0x2b0 [ 33.904077] mmap_region+0x1f9/0x2660 [ 33.904576] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.905115] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.905859] ? __pfx_lock_acquire+0x10/0x10 [ 33.906419] ? __pfx_mmap_region+0x10/0x10 [ 33.906979] ? security_mmap_addr+0x7d/0xa0 [ 33.907531] ? get_unmapped_area+0x1f5/0x3f0 [ 33.908110] do_mmap+0x854/0xf00 [ 33.908563] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.909076] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.909657] ksys_mmap_pgoff+0x3af/0x500 [ 33.910183] do_syscall_64+0x3f/0x90 [ 33.910679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.911375] RIP: 0033:0x7f9513169d82 [ 33.911852] 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 [ 33.914104] RSP: 002b:00007ffeaf80faf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.915082] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9513169d82 [ 33.915978] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95125a3000 [ 33.916869] RBP: 00007f95125a3000 R08: 0000000000000009 R09: 0000000000001000 [ 33.917754] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1c8384ec0 [ 33.918648] R13: 00007ffeaf80fb10 R14: 00007ffeaf80fb40 R15: 00007ffeaf80fea0 [ 33.919554] [ 33.919853] [ 33.920080] Allocated by task 215: [ 33.920533] kasan_save_stack+0x22/0x50 [ 33.921062] kasan_set_track+0x25/0x30 [ 33.921577] __kasan_slab_alloc+0x59/0x70 [ 33.922119] kmem_cache_alloc+0x16b/0x370 [ 33.922658] vm_area_dup+0x20/0x160 [ 33.923147] __split_vma+0x170/0x950 [ 33.923639] split_vma+0xc6/0x110 [ 33.924092] mprotect_fixup+0x8d2/0xb30 [ 33.924620] do_mprotect_pkey+0x87e/0xd40 [ 33.925161] __x64_sys_mprotect+0x78/0xc0 [ 33.925705] do_syscall_64+0x3f/0x90 [ 33.926201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.926865] [ 33.927099] Freed by task 215: [ 33.927508] kasan_save_stack+0x22/0x50 [ 33.928030] kasan_set_track+0x25/0x30 [ 33.928548] kasan_save_free_info+0x2b/0x50 [ 33.929107] __kasan_slab_free+0x10a/0x190 [ 33.929665] kmem_cache_free+0x10d/0x4d0 [ 33.930199] rcu_core+0x8c8/0x2860 [ 33.930661] __do_softirq+0x1b7/0x7d4 [ 33.931174] [ 33.931395] Last potentially related work creation: [ 33.932010] kasan_save_stack+0x22/0x50 [ 33.932537] __kasan_record_aux_stack+0x8e/0xa0 [ 33.933137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.933813] remove_vma+0x139/0x170 [ 33.934287] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.934866] do_vmi_munmap+0x1f1/0x2b0 [ 33.935395] __vm_munmap+0x138/0x3a0 [ 33.935882] __x64_sys_munmap+0x59/0x80 [ 33.936398] do_syscall_64+0x3f/0x90 [ 33.936888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.937564] [ 33.937786] Second to last potentially related work creation: [ 33.938503] kasan_save_stack+0x22/0x50 [ 33.939049] __kasan_record_aux_stack+0x8e/0xa0 [ 33.939653] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.940321] remove_vma+0x139/0x170 [ 33.940792] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.941370] do_vmi_munmap+0x1f1/0x2b0 [ 33.941876] mmap_region+0x1f9/0x2660 [ 33.942375] do_mmap+0x854/0xf00 [ 33.942821] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.943345] ksys_mmap_pgoff+0x3af/0x500 [ 33.943868] do_syscall_64+0x3f/0x90 [ 33.944359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.945037] [ 33.945262] The buggy address belongs to the object at ffff88800da3a9f8 [ 33.945262] which belongs to the cache vm_area_struct of size 168 [ 33.946785] The buggy address is located 88 bytes inside of [ 33.946785] freed 168-byte region [ffff88800da3a9f8, ffff88800da3aaa0) [ 33.948293] [ 33.948518] The buggy address belongs to the physical page: [ 33.949211] page:000000006ff977ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda3a [ 33.950343] memcg:ffff888013bae101 [ 33.950785] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.951466] page_type: 0xffffffff() [ 33.951938] raw: 0100000000000200 ffff88800879fc80 ffffea00003a4740 dead000000000006 [ 33.952903] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013bae101 [ 33.953864] page dumped because: kasan: bad access detected [ 33.954562] [ 33.954786] Memory state around the buggy address: [ 33.955399] ffff88800da3a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.956295] ffff88800da3a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 33.957194] >ffff88800da3aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.958085] ^ [ 33.958814] ffff88800da3aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 33.959746] ffff88800da3ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.960635] ================================================================== [ 33.961847] Disabling lock debugging due to kernel taint [ 35.944999] BUG: Bad rss-counter state mm:0000000055cc63d7 type:MM_FILEPAGES val:33 [ 35.945986] BUG: Bad rss-counter state mm:0000000055cc63d7 type:MM_ANONPAGES val:22 [ 36.443998] BUG: Bad rss-counter state mm:00000000e48f7798 type:MM_FILEPAGES val:33 [ 36.445184] BUG: Bad rss-counter state mm:00000000e48f7798 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31205' (ECDSA) to the list of known hosts. 2023/06/19 13:20:52 fuzzer started 2023/06/19 13:20:52 dialing manager at localhost:44161 2023/06/19 13:20:52 checking machine... 2023/06/19 13:20:52 checking revisions... [ 37.173459] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:20:52 testing simple program... [ 37.208918] cgroup: Unknown subsys name 'net' [ 37.258430] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:20:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009a6c000 RCX=0000000000000000 RDX=ffff88800c5c51c0 RSI=0000000000000004 RDI=ffffffff87f94e40 RBP=ffffffff87f94e40 RSP=ffff888018117500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8180fd24 RFL=00000293 [--S-A-C] 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 00007f4651ada900 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=00007ffcce3dd000 CR3=0000000016e3c000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86088c1a RDX=1ffff1100d9e135b RSI=1ffff1100d9e135a RDI=1ffff1100d9e135a RBP=ffff88806cf09ad0 RSP=ffff88806cf099b8 R8 =ffffffff86088c1e R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09b20 R15=ffff88806cf09a78 RIP=ffffffff811310ce 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 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=00007fb7c48d0100 CR3=000000000ec84000 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=30323a3331203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303630 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000