syzkaller login: [ 28.732929] BUG: Bad rss-counter state mm:00000000519fdfd2 type:MM_FILEPAGES val:33 [ 28.734467] BUG: Bad rss-counter state mm:00000000519fdfd2 type:MM_ANONPAGES val:22 [ 28.873646] ================================================================== [ 28.874517] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.875407] Read of size 8 at addr ffff88800ebf2140 by task sshd/220 [ 28.876133] [ 28.876340] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.877262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.878172] Call Trace: [ 28.878475] [ 28.878755] dump_stack_lvl+0x91/0xf0 [ 28.879227] print_report+0xcc/0x620 [ 28.879691] ? __virt_addr_valid+0x102/0x340 [ 28.880210] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.880790] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.881399] kasan_report+0xbe/0xf0 [ 28.881852] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.882517] vma_interval_tree_remove+0xc75/0xec0 [ 28.883131] vma_prepare+0xc54/0x11a0 [ 28.883615] __split_vma+0x5af/0x950 [ 28.884087] ? __pfx___split_vma+0x10/0x10 [ 28.884606] ? find_held_lock+0x2c/0x110 [ 28.885166] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.885727] ? lock_is_held_type+0x9f/0x120 [ 28.886263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.886869] ? mtree_range_walk+0x632/0x900 [ 28.887424] ? mas_walk+0x5c7/0x7c0 [ 28.887898] do_vmi_munmap+0x1f1/0x2b0 [ 28.888383] mmap_region+0x1f9/0x2660 [ 28.888864] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.889382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.890101] ? __pfx_lock_acquire+0x10/0x10 [ 28.890635] ? __pfx_mmap_region+0x10/0x10 [ 28.891157] ? security_mmap_addr+0x7d/0xa0 [ 28.891676] ? get_unmapped_area+0x1f5/0x3f0 [ 28.892229] do_mmap+0x854/0xf00 [ 28.892668] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.893178] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.893741] ksys_mmap_pgoff+0x3af/0x500 [ 28.894253] do_syscall_64+0x3f/0x90 [ 28.894725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.895367] RIP: 0033:0x7ff6414efd82 [ 28.895819] 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 [ 28.897964] RSP: 002b:00007ffded5ac718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.898874] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6414efd82 [ 28.899754] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff640929000 [ 28.900601] RBP: 00007ff640929000 R08: 0000000000000009 R09: 0000000000001000 [ 28.901473] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e7ea30ec0 [ 28.902332] R13: 00007ffded5ac730 R14: 00007ffded5ac760 R15: 00007ffded5acac0 [ 28.903203] [ 28.903494] [ 28.903709] Allocated by task 213: [ 28.904143] kasan_save_stack+0x22/0x50 [ 28.904655] kasan_set_track+0x25/0x30 [ 28.905182] __kasan_slab_alloc+0x59/0x70 [ 28.905710] kmem_cache_alloc+0x16b/0x370 [ 28.906232] vm_area_dup+0x20/0x160 [ 28.906693] __split_vma+0x170/0x950 [ 28.907164] split_vma+0xc6/0x110 [ 28.907602] mprotect_fixup+0x8d2/0xb30 [ 28.908104] do_mprotect_pkey+0x87e/0xd40 [ 28.908627] __x64_sys_mprotect+0x78/0xc0 [ 28.909163] do_syscall_64+0x3f/0x90 [ 28.909645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.910288] [ 28.910503] Freed by task 213: [ 28.910894] kasan_save_stack+0x22/0x50 [ 28.911404] kasan_set_track+0x25/0x30 [ 28.911903] kasan_save_free_info+0x2b/0x50 [ 28.912441] __kasan_slab_free+0x10a/0x190 [ 28.912977] kmem_cache_free+0x10d/0x4d0 [ 28.913540] rcu_core+0x8c8/0x2860 [ 28.914001] __do_softirq+0x1b7/0x7d4 [ 28.914477] [ 28.914696] Last potentially related work creation: [ 28.915282] kasan_save_stack+0x22/0x50 [ 28.915814] __kasan_record_aux_stack+0x8e/0xa0 [ 28.916430] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.917102] remove_vma+0x139/0x170 [ 28.917564] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.918152] do_vmi_munmap+0x1f1/0x2b0 [ 28.918663] __vm_munmap+0x138/0x3a0 [ 28.919143] __x64_sys_munmap+0x59/0x80 [ 28.919644] do_syscall_64+0x3f/0x90 [ 28.920123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.920798] [ 28.921039] The buggy address belongs to the object at ffff88800ebf20e8 [ 28.921039] which belongs to the cache vm_area_struct of size 168 [ 28.922529] The buggy address is located 88 bytes inside of [ 28.922529] freed 168-byte region [ffff88800ebf20e8, ffff88800ebf2190) [ 28.923971] [ 28.924193] The buggy address belongs to the physical page: [ 28.924863] page:0000000061d67680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebf2 [ 28.925977] memcg:ffff88800fe31b01 [ 28.926412] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.927069] page_type: 0xffffffff() [ 28.927534] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.928480] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe31b01 [ 28.929432] page dumped because: kasan: bad access detected [ 28.930109] [ 28.930330] Memory state around the buggy address: [ 28.930922] ffff88800ebf2000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.931799] ffff88800ebf2080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 28.932673] >ffff88800ebf2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.933541] ^ [ 28.934193] ffff88800ebf2180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.935067] ffff88800ebf2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.935951] ================================================================== [ 28.936935] Disabling lock debugging due to kernel taint [ 30.958017] BUG: Bad rss-counter state mm:0000000045fb69c3 type:MM_FILEPAGES val:33 [ 30.959226] BUG: Bad rss-counter state mm:0000000045fb69c3 type:MM_ANONPAGES val:22 [ 31.490791] BUG: Bad rss-counter state mm:0000000082cef8e7 type:MM_FILEPAGES val:33 [ 31.491974] BUG: Bad rss-counter state mm:0000000082cef8e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37913' (ECDSA) to the list of known hosts. 2023/06/20 18:56:25 fuzzer started 2023/06/20 18:56:25 dialing manager at localhost:36067 2023/06/20 18:56:25 checking machine... 2023/06/20 18:56:25 checking revisions... [ 32.095085] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:56:25 testing simple program... [ 32.142828] cgroup: Unknown subsys name 'net' [ 32.195682] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:56:25 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=ffff8880146afa28 RSI=0000000000000000 RDI=ffff8880146af6e0 RBP=ffff8880146af768 RSP=ffff8880146af6d0 R8 =ffffffff86138e90 R9 =ffff8880146af710 R10=0000000000038001 R11=0000000000020d8f R12=ffff8880146af798 R13=0000000000000000 R14=ffff888006b13680 R15=dffffc0000000000 RIP=ffffffff810bd057 RFL=00000282 [--S----] 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 00007f2c21daf900 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=00007f4df048e650 CR3=000000000cb4e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=dd8ed5652660db6400000000000ae988 XMM05=ce9af8d2ecf6d4050000000000133590 XMM06=c291bd5c70af25b90000000000132380 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f9e9008 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff88801474d1c0 RSI=ffffffff83c5c828 RDI=ffff88800ca90958 RBP=ffff88800f9e8eb0 RSP=ffff88800fbbf580 R8 =0000000000000004 R9 =000000000000000d R10=000000000000000d R11=000008b3000008b3 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000000 R15=000000000000000d RIP=ffffffff814c0864 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 00007f4defed9900 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=00007f4df0490618 CR3=000000000c718000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000