syzkaller login: [ 30.556328] BUG: Bad rss-counter state mm:00000000c2ef0f4f type:MM_FILEPAGES val:33 [ 30.558194] BUG: Bad rss-counter state mm:00000000c2ef0f4f type:MM_ANONPAGES val:22 [ 30.696681] ================================================================== [ 30.697599] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.698545] Read of size 8 at addr ffff88801006a140 by task sshd/220 [ 30.699413] [ 30.699646] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.700510] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.701505] Call Trace: [ 30.701825] [ 30.702113] dump_stack_lvl+0x91/0xf0 [ 30.702603] print_report+0xcc/0x620 [ 30.703088] ? __virt_addr_valid+0x102/0x340 [ 30.703685] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.704315] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.704929] kasan_report+0xbe/0xf0 [ 30.705411] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706032] vma_interval_tree_remove+0xc75/0xec0 [ 30.706633] vma_prepare+0xc54/0x11a0 [ 30.707113] __split_vma+0x5af/0x950 [ 30.707598] ? __pfx___split_vma+0x10/0x10 [ 30.708127] ? find_held_lock+0x2c/0x110 [ 30.708647] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.709211] ? lock_is_held_type+0x9f/0x120 [ 30.709751] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.710360] ? mtree_range_walk+0x632/0x900 [ 30.710914] ? mas_walk+0x5c7/0x7c0 [ 30.711389] do_vmi_munmap+0x1f1/0x2b0 [ 30.711912] mmap_region+0x1f9/0x2660 [ 30.712395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.712910] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.713622] ? __pfx_lock_acquire+0x10/0x10 [ 30.714160] ? __pfx_mmap_region+0x10/0x10 [ 30.714689] ? security_mmap_addr+0x7d/0xa0 [ 30.715226] ? get_unmapped_area+0x1f5/0x3f0 [ 30.715801] do_mmap+0x854/0xf00 [ 30.716247] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.716741] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.717311] ksys_mmap_pgoff+0x3af/0x500 [ 30.717818] do_syscall_64+0x3f/0x90 [ 30.718310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.718955] RIP: 0033:0x7f8ced8aed82 [ 30.719412] 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 [ 30.721569] RSP: 002b:00007ffeda495358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.722489] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ced8aed82 [ 30.723347] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8cecce8000 [ 30.724219] RBP: 00007f8cecce8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.725071] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a040359d90 [ 30.725926] R13: 00007ffeda495370 R14: 00007ffeda4953a0 R15: 00007ffeda495700 [ 30.726801] [ 30.727101] [ 30.727319] Allocated by task 213: [ 30.727768] kasan_save_stack+0x22/0x50 [ 30.728274] kasan_set_track+0x25/0x30 [ 30.728768] __kasan_slab_alloc+0x59/0x70 [ 30.729302] kmem_cache_alloc+0x16b/0x370 [ 30.729817] vm_area_dup+0x20/0x160 [ 30.730273] __split_vma+0x170/0x950 [ 30.730739] split_vma+0xc6/0x110 [ 30.731194] mprotect_fixup+0x8d2/0xb30 [ 30.731728] do_mprotect_pkey+0x87e/0xd40 [ 30.732267] __x64_sys_mprotect+0x78/0xc0 [ 30.732805] do_syscall_64+0x3f/0x90 [ 30.733286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.733936] [ 30.734152] Freed by task 13: [ 30.734542] kasan_save_stack+0x22/0x50 [ 30.735052] kasan_set_track+0x25/0x30 [ 30.735570] kasan_save_free_info+0x2b/0x50 [ 30.736103] __kasan_slab_free+0x10a/0x190 [ 30.736639] kmem_cache_free+0x10d/0x4d0 [ 30.737153] rcu_core+0x8c8/0x2860 [ 30.737596] __do_softirq+0x1b7/0x7d4 [ 30.738077] [ 30.738292] Last potentially related work creation: [ 30.738881] kasan_save_stack+0x22/0x50 [ 30.739397] __kasan_record_aux_stack+0x8e/0xa0 [ 30.739989] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.740672] remove_vma+0x139/0x170 [ 30.741152] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.741746] do_vmi_munmap+0x1f1/0x2b0 [ 30.742254] __vm_munmap+0x138/0x3a0 [ 30.742753] __x64_sys_munmap+0x59/0x80 [ 30.743280] do_syscall_64+0x3f/0x90 [ 30.743802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.744488] [ 30.744714] The buggy address belongs to the object at ffff88801006a0e8 [ 30.744714] which belongs to the cache vm_area_struct of size 168 [ 30.746295] The buggy address is located 88 bytes inside of [ 30.746295] freed 168-byte region [ffff88801006a0e8, ffff88801006a190) [ 30.747822] [ 30.748052] The buggy address belongs to the physical page: [ 30.748759] page:000000003dd1803d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1006a [ 30.750202] memcg:ffff88800eec6e01 [ 30.750758] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.751701] page_type: 0xffffffff() [ 30.752294] raw: 0100000000000200 ffff8880087a0c80 ffffea0000313fc0 dead00000000000d [ 30.753520] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eec6e01 [ 30.754716] page dumped because: kasan: bad access detected [ 30.755602] [ 30.755878] Memory state around the buggy address: [ 30.756639] ffff88801006a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.757776] ffff88801006a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.758918] >ffff88801006a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.760044] ^ [ 30.760889] ffff88801006a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.762029] ffff88801006a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.763163] ================================================================== [ 30.764429] Disabling lock debugging due to kernel taint [ 32.134400] BUG: Bad rss-counter state mm:0000000056e508fd type:MM_FILEPAGES val:33 [ 32.134934] BUG: Bad rss-counter state mm:0000000056e508fd type:MM_ANONPAGES val:22 [ 32.507267] BUG: Bad rss-counter state mm:0000000020d35990 type:MM_FILEPAGES val:33 [ 32.508276] BUG: Bad rss-counter state mm:0000000020d35990 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52955' (ECDSA) to the list of known hosts. 2023/06/20 16:54:39 fuzzer started 2023/06/20 16:54:39 dialing manager at localhost:36067 2023/06/20 16:54:39 checking machine... 2023/06/20 16:54:39 checking revisions... [ 33.264386] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:54:39 testing simple program... [ 33.309481] cgroup: Unknown subsys name 'net' [ 33.379927] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:54:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed100d9c13b1 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09d78 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b520 R15=0000000000000000 RIP=ffffffff812d9031 RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007effee544900 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=00007effed98ce70 CR3=000000000c564000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a6674043428fac6b00000000000ae988 XMM05=320783e992b46e810000000000133058 XMM06=19e9129bd510f23500000000001321a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000b RBX=000000000000000b RCX=0000000000000000 RDX=ffff88800ddb0000 RSI=000000000000000b RDI=0000000000000000 RBP=00007f41b2b1b15e RSP=ffff88800fca7d60 R8 =0000000000000007 R9 =0000000000000000 R10=0000000080000000 R11=0000000000000000 R12=ffff888016d93300 R13=0000000000000000 R14=000000000000000b R15=ffffffff85d3e300 RIP=ffffffff814c0404 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 00007f41b2b25900 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=00007f41b30dd0b0 CR3=000000000c81e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000