syzkaller login: [ 40.871668] BUG: Bad rss-counter state mm:00000000bffcf96f type:MM_FILEPAGES val:33 [ 40.873640] BUG: Bad rss-counter state mm:00000000bffcf96f type:MM_ANONPAGES val:22 [ 41.042151] ================================================================== [ 41.043121] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.044126] Read of size 8 at addr ffff88801405a6b0 by task sshd/219 [ 41.045074] [ 41.045307] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.046222] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.047290] Call Trace: [ 41.047634] [ 41.047939] dump_stack_lvl+0x91/0xf0 [ 41.048461] print_report+0xcc/0x620 [ 41.049007] ? __virt_addr_valid+0x102/0x340 [ 41.049602] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.050271] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.050930] kasan_report+0xbe/0xf0 [ 41.051447] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.052126] vma_interval_tree_remove+0xc75/0xec0 [ 41.052786] vma_prepare+0xc54/0x11a0 [ 41.053320] __split_vma+0x5af/0x950 [ 41.053839] ? __pfx___split_vma+0x10/0x10 [ 41.054418] ? find_held_lock+0x2c/0x110 [ 41.054988] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.055616] ? lock_is_held_type+0x9f/0x120 [ 41.056211] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.056882] ? mtree_range_walk+0x632/0x900 [ 41.057503] ? mas_walk+0x5c7/0x7c0 [ 41.058016] do_vmi_munmap+0x1f1/0x2b0 [ 41.058550] mmap_region+0x1f9/0x2660 [ 41.059081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.059640] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.060421] ? __pfx_lock_acquire+0x10/0x10 [ 41.061016] ? __pfx_mmap_region+0x10/0x10 [ 41.061601] ? security_mmap_addr+0x7d/0xa0 [ 41.062187] ? get_unmapped_area+0x1f5/0x3f0 [ 41.062796] do_mmap+0x854/0xf00 [ 41.063280] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.063828] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.064445] ksys_mmap_pgoff+0x3af/0x500 [ 41.065005] do_syscall_64+0x3f/0x90 [ 41.065534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.066248] RIP: 0033:0x7fe82907bd82 [ 41.066744] 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 [ 41.069086] RSP: 002b:00007fff2ca90318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.070083] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe82907bd82 [ 41.071010] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8284b5000 [ 41.071937] RBP: 00007fe8284b5000 R08: 0000000000000009 R09: 0000000000001000 [ 41.072869] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df6ac99f70 [ 41.073817] R13: 00007fff2ca90330 R14: 00007fff2ca90360 R15: 00007fff2ca906c0 [ 41.074757] [ 41.075078] [ 41.075312] Allocated by task 212: [ 41.075791] kasan_save_stack+0x22/0x50 [ 41.076350] kasan_set_track+0x25/0x30 [ 41.076886] __kasan_slab_alloc+0x59/0x70 [ 41.077473] kmem_cache_alloc+0x16b/0x370 [ 41.078045] vm_area_dup+0x20/0x160 [ 41.078539] __split_vma+0x170/0x950 [ 41.079042] split_vma+0xc6/0x110 [ 41.079526] mprotect_fixup+0x8d2/0xb30 [ 41.080074] do_mprotect_pkey+0x87e/0xd40 [ 41.080649] __x64_sys_mprotect+0x78/0xc0 [ 41.081242] do_syscall_64+0x3f/0x90 [ 41.081765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.082459] [ 41.082696] Freed by task 212: [ 41.083127] kasan_save_stack+0x22/0x50 [ 41.083685] kasan_set_track+0x25/0x30 [ 41.084218] kasan_save_free_info+0x2b/0x50 [ 41.084801] __kasan_slab_free+0x10a/0x190 [ 41.085387] kmem_cache_free+0x10d/0x4d0 [ 41.085943] rcu_core+0x8c8/0x2860 [ 41.086432] __do_softirq+0x1b7/0x7d4 [ 41.086946] [ 41.087181] Last potentially related work creation: [ 41.087821] kasan_save_stack+0x22/0x50 [ 41.088374] __kasan_record_aux_stack+0x8e/0xa0 [ 41.089022] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.089724] remove_vma+0x139/0x170 [ 41.090221] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.090838] do_vmi_munmap+0x1f1/0x2b0 [ 41.091370] __vm_munmap+0x138/0x3a0 [ 41.091889] __x64_sys_munmap+0x59/0x80 [ 41.092437] do_syscall_64+0x3f/0x90 [ 41.092959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.093662] [ 41.093899] The buggy address belongs to the object at ffff88801405a658 [ 41.093899] which belongs to the cache vm_area_struct of size 168 [ 41.095521] The buggy address is located 88 bytes inside of [ 41.095521] freed 168-byte region [ffff88801405a658, ffff88801405a700) [ 41.097070] [ 41.097304] The buggy address belongs to the physical page: [ 41.098019] page:00000000e2f1934e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1405a [ 41.099211] memcg:ffff888014145601 [ 41.099691] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.100456] page_type: 0xffffffff() [ 41.100945] raw: 0100000000000200 ffff88800879fc80 ffffea0000314600 dead00000000000b [ 41.101938] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014145601 [ 41.102926] page dumped because: kasan: bad access detected [ 41.103639] [ 41.103866] Memory state around the buggy address: [ 41.104479] ffff88801405a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.105419] ffff88801405a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 41.106339] >ffff88801405a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.107264] ^ [ 41.107895] ffff88801405a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 41.108825] ffff88801405a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.109755] ================================================================== [ 41.111189] Disabling lock debugging due to kernel taint [ 42.909332] BUG: Bad rss-counter state mm:00000000e6fd1513 type:MM_FILEPAGES val:33 [ 42.910510] BUG: Bad rss-counter state mm:00000000e6fd1513 type:MM_ANONPAGES val:22 [ 43.254810] BUG: Bad rss-counter state mm:000000004c5789a0 type:MM_FILEPAGES val:33 [ 43.255547] BUG: Bad rss-counter state mm:000000004c5789a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24495' (ECDSA) to the list of known hosts. 2023/06/20 04:35:28 fuzzer started 2023/06/20 04:35:28 dialing manager at localhost:44161 2023/06/20 04:35:28 checking machine... 2023/06/20 04:35:28 checking revisions... [ 43.768389] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:35:28 testing simple program... [ 43.803398] cgroup: Unknown subsys name 'net' [ 43.841880] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:35:26 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff8451b6ac RDX=ffffed1002ddbef0 RSI=0000000000000008 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888016edf818 R8 =0000000000000001 R9 =ffffed1002ddbeef R10=ffff888016edf77f R11=00000000000b6996 R12=ffff88800f4ab500 R13=0000000000000000 R14=ffff888019f51579 R15=ffff888019f51600 RIP=ffffffff814c07eb 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 00007f3dc059e900 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=00007fffbd1ac000 CR3=000000000d798000 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=0000000000000000 RBX=ffff88800c968500 RCX=ffffffff812e00e5 RDX=1ffff11001a0b15e RSI=0000000000000202 RDI=ffff88806cf09d58 RBP=ffff88800d058ab0 RSP=ffff88806cf09de8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=ffff88800d058b40 R13=ffff88800d058af0 R14=ffffffff8186b9c5 R15=ffff8880100a4680 RIP=ffffffff8184670f RFL=00000012 [----A--] 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=00007f395c3baaf0 CR3=000000000eaa4000 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=2037323a35333a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a35333a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000