syzkaller login: [ 31.859585] BUG: Bad rss-counter state mm:00000000ec85bd34 type:MM_FILEPAGES val:33 [ 31.860826] BUG: Bad rss-counter state mm:00000000ec85bd34 type:MM_ANONPAGES val:22 [ 31.902272] ================================================================== [ 31.903540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.904889] Read of size 8 at addr ffff888018ab5310 by task sshd/219 [ 31.905916] [ 31.906242] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.907310] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.908465] Call Trace: [ 31.908786] [ 31.909070] dump_stack_lvl+0x91/0xf0 [ 31.909577] print_report+0xcc/0x620 [ 31.910062] ? __virt_addr_valid+0x102/0x340 [ 31.910623] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.911258] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.911896] kasan_report+0xbe/0xf0 [ 31.912371] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.913000] vma_interval_tree_remove+0xc75/0xec0 [ 31.913600] vma_prepare+0xc54/0x11a0 [ 31.914077] __split_vma+0x5af/0x950 [ 31.914547] ? __pfx___split_vma+0x10/0x10 [ 31.915076] ? find_held_lock+0x2c/0x110 [ 31.915594] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.916173] ? lock_is_held_type+0x9f/0x120 [ 31.916712] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.917310] ? mtree_range_walk+0x632/0x900 [ 31.917864] ? mas_walk+0x5c7/0x7c0 [ 31.918336] do_vmi_munmap+0x1f1/0x2b0 [ 31.918824] mmap_region+0x1f9/0x2660 [ 31.919301] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.919821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.920538] ? __pfx_lock_acquire+0x10/0x10 [ 31.921068] ? __pfx_mmap_region+0x10/0x10 [ 31.921598] ? security_mmap_addr+0x7d/0xa0 [ 31.922130] ? get_unmapped_area+0x1f5/0x3f0 [ 31.922676] do_mmap+0x854/0xf00 [ 31.923108] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.923601] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.924185] ksys_mmap_pgoff+0x3af/0x500 [ 31.924693] do_syscall_64+0x3f/0x90 [ 31.925168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.925808] RIP: 0033:0x7f5866943d82 [ 31.926261] 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 [ 31.928397] RSP: 002b:00007ffdf75fbbb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.929316] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5866943d82 [ 31.930155] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5865d7d000 [ 31.931013] RBP: 00007f5865d7d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.931887] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff4e9bcec0 [ 31.932752] R13: 00007ffdf75fbbd0 R14: 00007ffdf75fbc00 R15: 00007ffdf75fbf60 [ 31.933614] [ 31.933909] [ 31.934124] Allocated by task 212: [ 31.934552] kasan_save_stack+0x22/0x50 [ 31.935066] kasan_set_track+0x25/0x30 [ 31.935563] __kasan_slab_alloc+0x59/0x70 [ 31.936097] kmem_cache_alloc+0x16b/0x370 [ 31.936628] vm_area_dup+0x20/0x160 [ 31.937121] __split_vma+0x170/0x950 [ 31.937628] split_vma+0xc6/0x110 [ 31.938104] mprotect_fixup+0x8d2/0xb30 [ 31.938642] do_mprotect_pkey+0x87e/0xd40 [ 31.939214] __x64_sys_mprotect+0x78/0xc0 [ 31.939784] do_syscall_64+0x3f/0x90 [ 31.940300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.941024] [ 31.941258] Freed by task 212: [ 31.941683] kasan_save_stack+0x22/0x50 [ 31.942281] kasan_set_track+0x25/0x30 [ 31.942829] kasan_save_free_info+0x2b/0x50 [ 31.943416] __kasan_slab_free+0x10a/0x190 [ 31.944015] kmem_cache_free+0x10d/0x4d0 [ 31.944569] rcu_core+0x8c8/0x2860 [ 31.945047] __do_softirq+0x1b7/0x7d4 [ 31.945548] [ 31.945800] Last potentially related work creation: [ 31.946481] kasan_save_stack+0x22/0x50 [ 31.947013] __kasan_record_aux_stack+0x8e/0xa0 [ 31.947610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.948308] remove_vma+0x139/0x170 [ 31.948788] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.949371] do_vmi_munmap+0x1f1/0x2b0 [ 31.949873] __vm_munmap+0x138/0x3a0 [ 31.950354] __x64_sys_munmap+0x59/0x80 [ 31.950874] do_syscall_64+0x3f/0x90 [ 31.951371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.952098] [ 31.952322] The buggy address belongs to the object at ffff888018ab52b8 [ 31.952322] which belongs to the cache vm_area_struct of size 168 [ 31.953867] The buggy address is located 88 bytes inside of [ 31.953867] freed 168-byte region [ffff888018ab52b8, ffff888018ab5360) [ 31.955326] [ 31.955548] The buggy address belongs to the physical page: [ 31.956247] page:000000006f6a3bfa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ab5 [ 31.957370] memcg:ffff88801661d501 [ 31.957814] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.958479] page_type: 0xffffffff() [ 31.958946] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.959913] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801661d501 [ 31.960848] page dumped because: kasan: bad access detected [ 31.961533] [ 31.961755] Memory state around the buggy address: [ 31.962348] ffff888018ab5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.963245] ffff888018ab5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.964135] >ffff888018ab5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.965016] ^ [ 31.965505] ffff888018ab5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.966383] ffff888018ab5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.967261] ================================================================== [ 31.968235] Disabling lock debugging due to kernel taint [ 33.921739] BUG: Bad rss-counter state mm:00000000af715b6c type:MM_FILEPAGES val:33 [ 33.922682] BUG: Bad rss-counter state mm:00000000af715b6c type:MM_ANONPAGES val:22 [ 34.454826] BUG: Bad rss-counter state mm:00000000e8f02dd5 type:MM_FILEPAGES val:33 [ 34.455978] BUG: Bad rss-counter state mm:00000000e8f02dd5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6006' (ECDSA) to the list of known hosts. 2023/06/21 01:26:28 fuzzer started 2023/06/21 01:26:28 dialing manager at localhost:36067 2023/06/21 01:26:28 checking machine... 2023/06/21 01:26:28 checking revisions... [ 35.093045] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:26:28 testing simple program... [ 35.139618] cgroup: Unknown subsys name 'net' [ 35.186693] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:26:28 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff83ab1b07 RDI=ffffffff87f9768c RBP=0000000000000000 RSP=ffff88800f247500 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=00000abe00000abe R12=0000000000000000 R13=00000000000000e1 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0871 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 00007f1f5d3d8900 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=00007f1f5d98f618 CR3=000000000f3ae000 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=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 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=00007f6002b52ff0 CR3=0000000008c68000 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=38a8992c87c26482b94d75ccefd5cb2b XMM02=000000000011b080ec2efd57dc4c00df XMM03=00000000001212e0c4b171d879b770c0 XMM04=6775cd7adf5667f600000000000ae988 XMM05=dfcdbad4f1609c370000000000131370 XMM06=13649337858ec7ae00000000001301d8 XMM07=e042d86d42eb936e0000000000121560 XMM08=c4b171d879b770c0000000000011b0e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000