[ 27.775819] BUG: Bad rss-counter state mm:00000000bfa8573d type:MM_FILEPAGES val:33 [ 27.777258] BUG: Bad rss-counter state mm:00000000bfa8573d type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.921702] ================================================================== [ 27.922606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.923553] Read of size 8 at addr ffff88800d894df0 by task sshd/220 [ 27.924432] [ 27.924668] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.925594] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.926587] Call Trace: [ 27.926911] [ 27.927196] dump_stack_lvl+0x91/0xf0 [ 27.927696] print_report+0xcc/0x620 [ 27.928190] ? __virt_addr_valid+0x102/0x340 [ 27.928775] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.929433] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.930058] kasan_report+0xbe/0xf0 [ 27.930536] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.931154] vma_interval_tree_remove+0xc75/0xec0 [ 27.931759] vma_prepare+0xc54/0x11a0 [ 27.932248] __split_vma+0x5af/0x950 [ 27.932743] ? __pfx___split_vma+0x10/0x10 [ 27.933297] ? find_held_lock+0x2c/0x110 [ 27.933839] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.934406] ? lock_is_held_type+0x9f/0x120 [ 27.934944] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.935555] ? mtree_range_walk+0x632/0x900 [ 27.936105] ? mas_walk+0x5c7/0x7c0 [ 27.936588] do_vmi_munmap+0x1f1/0x2b0 [ 27.937083] mmap_region+0x1f9/0x2660 [ 27.937612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.938127] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.938835] ? __pfx_lock_acquire+0x10/0x10 [ 27.939368] ? __pfx_mmap_region+0x10/0x10 [ 27.939907] ? security_mmap_addr+0x7d/0xa0 [ 27.940448] ? get_unmapped_area+0x1f5/0x3f0 [ 27.941039] do_mmap+0x854/0xf00 [ 27.941519] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.942021] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.942590] ksys_mmap_pgoff+0x3af/0x500 [ 27.943101] do_syscall_64+0x3f/0x90 [ 27.943588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.944246] RIP: 0033:0x7fdbd520bd82 [ 27.944734] 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 [ 27.946894] RSP: 002b:00007fff29204bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.947802] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbd520bd82 [ 27.948675] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbd4645000 [ 27.949568] RBP: 00007fdbd4645000 R08: 0000000000000009 R09: 0000000000001000 [ 27.950421] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e30ff3ec0 [ 27.951275] R13: 00007fff29204be0 R14: 00007fff29204c10 R15: 00007fff29204f70 [ 27.952138] [ 27.952435] [ 27.952679] Allocated by task 213: [ 27.953109] kasan_save_stack+0x22/0x50 [ 27.953651] kasan_set_track+0x25/0x30 [ 27.954155] __kasan_slab_alloc+0x59/0x70 [ 27.954679] kmem_cache_alloc+0x16b/0x370 [ 27.955202] vm_area_dup+0x20/0x160 [ 27.955658] __split_vma+0x170/0x950 [ 27.956129] split_vma+0xc6/0x110 [ 27.956577] mprotect_fixup+0x8d2/0xb30 [ 27.957083] do_mprotect_pkey+0x87e/0xd40 [ 27.957638] __x64_sys_mprotect+0x78/0xc0 [ 27.958161] do_syscall_64+0x3f/0x90 [ 27.958637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.959278] [ 27.959498] Freed by task 213: [ 27.959893] kasan_save_stack+0x22/0x50 [ 27.960397] kasan_set_track+0x25/0x30 [ 27.960912] kasan_save_free_info+0x2b/0x50 [ 27.961489] __kasan_slab_free+0x10a/0x190 [ 27.962026] kmem_cache_free+0x10d/0x4d0 [ 27.962538] rcu_core+0x8c8/0x2860 [ 27.962987] __do_softirq+0x1b7/0x7d4 [ 27.963474] [ 27.963692] Last potentially related work creation: [ 27.964273] kasan_save_stack+0x22/0x50 [ 27.964798] __kasan_record_aux_stack+0x8e/0xa0 [ 27.965414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.966071] remove_vma+0x139/0x170 [ 27.966530] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.967091] do_vmi_munmap+0x1f1/0x2b0 [ 27.967597] __vm_munmap+0x138/0x3a0 [ 27.968063] __x64_sys_munmap+0x59/0x80 [ 27.968574] do_syscall_64+0x3f/0x90 [ 27.969054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.969722] [ 27.969946] Second to last potentially related work creation: [ 27.970627] kasan_save_stack+0x22/0x50 [ 27.971132] __kasan_record_aux_stack+0x8e/0xa0 [ 27.971712] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.972365] remove_vma+0x139/0x170 [ 27.972850] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.973450] do_vmi_munmap+0x1f1/0x2b0 [ 27.973946] mmap_region+0x1f9/0x2660 [ 27.974437] do_mmap+0x854/0xf00 [ 27.974868] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.975367] ksys_mmap_pgoff+0x3af/0x500 [ 27.975872] do_syscall_64+0x3f/0x90 [ 27.976350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.977010] [ 27.977237] The buggy address belongs to the object at ffff88800d894d98 [ 27.977237] which belongs to the cache vm_area_struct of size 168 [ 27.978733] The buggy address is located 88 bytes inside of [ 27.978733] freed 168-byte region [ffff88800d894d98, ffff88800d894e40) [ 27.980189] [ 27.980414] The buggy address belongs to the physical page: [ 27.981092] page:00000000c1828254 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd894 [ 27.982189] memcg:ffff88800e1bac01 [ 27.982619] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.983307] page_type: 0xffffffff() [ 27.983788] raw: 0100000000000200 ffff88800879fc80 ffffea00003accc0 dead000000000006 [ 27.984770] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1bac01 [ 27.985678] page dumped because: kasan: bad access detected [ 27.986350] [ 27.986565] Memory state around the buggy address: [ 27.987159] ffff88800d894c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 27.988057] ffff88800d894d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 27.988947] >ffff88800d894d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 27.989803] ^ [ 27.990614] ffff88800d894e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.991531] ffff88800d894e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.992398] ================================================================== [ 27.993410] Disabling lock debugging due to kernel taint [ 30.418997] BUG: Bad rss-counter state mm:0000000042be77aa type:MM_FILEPAGES val:33 [ 30.420116] BUG: Bad rss-counter state mm:0000000042be77aa type:MM_ANONPAGES val:22 [ 30.878998] BUG: Bad rss-counter state mm:00000000db844ce6 type:MM_FILEPAGES val:33 [ 30.880034] BUG: Bad rss-counter state mm:00000000db844ce6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8260' (ECDSA) to the list of known hosts. 2023/06/19 21:01:33 fuzzer started 2023/06/19 21:01:33 dialing manager at localhost:44161 2023/06/19 21:01:33 checking machine... 2023/06/19 21:01:33 checking revisions... [ 31.631069] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:01:33 testing simple program... [ 31.682583] cgroup: Unknown subsys name 'net' [ 31.719011] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:01:29 Registers: info registers vcpu 0 RAX=1ffffffff0bf4732 RBX=ffffffff85fa3990 RCX=ffffffff8363dca6 RDX=0000000000000008 RSI=ffffffff863b1c4e RDI=ffffffff85fa3980 RBP=ffffffff85fa3980 RSP=ffff88806ce099c0 R8 =ffffffff863b1c4e R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000008a96b R12=ffffffff85fa39a0 R13=ffffffff85fa3980 R14=ffffffff85fa3980 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000212 [----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 00007f7998a1f900 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=00007f7998fd6618 CR3=0000000009a1e000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007fb582091530 CR3=000000000f448000 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=520c582b6e609f912d457497a4fd50ba XMM02=000000000011cba8eff9b2d0a8fce9cb XMM03=000000000011cc782c67c8bc2e329bc3 XMM04=4b685c5e3266296500000000000ae988 XMM05=2b1eb625fc3f2bca0000000000135350 XMM06=4fda316b135da52b0000000000134080 XMM07=e042d86d42eb936e0000000000123510 XMM08=97f448135cf7bbb5000000000011cc78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000