syzkaller login: [ 33.085353] BUG: Bad rss-counter state mm:00000000a797dad9 type:MM_FILEPAGES val:33 [ 33.086695] BUG: Bad rss-counter state mm:00000000a797dad9 type:MM_ANONPAGES val:22 [ 33.193261] ================================================================== [ 33.194302] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.195436] Read of size 8 at addr ffff88800de93c20 by task sshd/219 [ 33.196218] [ 33.196460] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.197351] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.198350] Call Trace: [ 33.198667] [ 33.198948] dump_stack_lvl+0x91/0xf0 [ 33.199517] print_report+0xcc/0x620 [ 33.200064] ? __virt_addr_valid+0x102/0x340 [ 33.200678] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.201319] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.201934] kasan_report+0xbe/0xf0 [ 33.202462] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.203122] vma_interval_tree_remove+0xc75/0xec0 [ 33.203752] vma_prepare+0xc54/0x11a0 [ 33.204250] __split_vma+0x5af/0x950 [ 33.204772] ? __pfx___split_vma+0x10/0x10 [ 33.205381] ? find_held_lock+0x2c/0x110 [ 33.205927] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.206509] ? lock_is_held_type+0x9f/0x120 [ 33.207077] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.207750] ? mtree_range_walk+0x632/0x900 [ 33.208381] ? mas_walk+0x5c7/0x7c0 [ 33.208877] do_vmi_munmap+0x1f1/0x2b0 [ 33.209387] mmap_region+0x1f9/0x2660 [ 33.209872] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.210478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.211240] ? __pfx_lock_acquire+0x10/0x10 [ 33.211785] ? __pfx_mmap_region+0x10/0x10 [ 33.212367] ? security_mmap_addr+0x7d/0xa0 [ 33.212974] ? get_unmapped_area+0x1f5/0x3f0 [ 33.213591] do_mmap+0x854/0xf00 [ 33.214039] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.214553] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.215120] ksys_mmap_pgoff+0x3af/0x500 [ 33.215745] do_syscall_64+0x3f/0x90 [ 33.216254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.216965] RIP: 0033:0x7f4f41cf3d82 [ 33.217449] 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 [ 33.219716] RSP: 002b:00007ffd6ff5a4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.220659] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f41cf3d82 [ 33.221593] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f4112d000 [ 33.222455] RBP: 00007f4f4112d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.223345] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555813e42980 [ 33.224303] R13: 00007ffd6ff5a4f0 R14: 00007ffd6ff5a520 R15: 00007ffd6ff5a880 [ 33.225216] [ 33.225523] [ 33.225742] Allocated by task 212: [ 33.226253] kasan_save_stack+0x22/0x50 [ 33.226771] kasan_set_track+0x25/0x30 [ 33.227301] __kasan_slab_alloc+0x59/0x70 [ 33.227847] kmem_cache_alloc+0x16b/0x370 [ 33.228428] vm_area_dup+0x20/0x160 [ 33.228970] __split_vma+0x170/0x950 [ 33.229483] split_vma+0xc6/0x110 [ 33.229929] mprotect_fixup+0x8d2/0xb30 [ 33.230444] do_mprotect_pkey+0x87e/0xd40 [ 33.231005] __x64_sys_mprotect+0x78/0xc0 [ 33.231626] do_syscall_64+0x3f/0x90 [ 33.232110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.232818] [ 33.233036] Freed by task 209: [ 33.233464] kasan_save_stack+0x22/0x50 [ 33.233993] kasan_set_track+0x25/0x30 [ 33.234555] kasan_save_free_info+0x2b/0x50 [ 33.235116] __kasan_slab_free+0x10a/0x190 [ 33.235692] kmem_cache_free+0x10d/0x4d0 [ 33.236236] rcu_core+0x8c8/0x2860 [ 33.236719] __do_softirq+0x1b7/0x7d4 [ 33.237293] [ 33.237541] Last potentially related work creation: [ 33.238192] kasan_save_stack+0x22/0x50 [ 33.238773] __kasan_record_aux_stack+0x8e/0xa0 [ 33.239509] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.240302] remove_vma+0x139/0x170 [ 33.240801] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.241450] do_vmi_munmap+0x1f1/0x2b0 [ 33.241960] __vm_munmap+0x138/0x3a0 [ 33.242537] __x64_sys_munmap+0x59/0x80 [ 33.243061] do_syscall_64+0x3f/0x90 [ 33.243562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.244247] [ 33.244488] The buggy address belongs to the object at ffff88800de93bc8 [ 33.244488] which belongs to the cache vm_area_struct of size 168 [ 33.246159] The buggy address is located 88 bytes inside of [ 33.246159] freed 168-byte region [ffff88800de93bc8, ffff88800de93c70) [ 33.247742] [ 33.247992] The buggy address belongs to the physical page: [ 33.248706] page:000000007775c508 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde93 [ 33.249911] memcg:ffff88800a167f01 [ 33.250413] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.251142] page_type: 0xffffffff() [ 33.251622] raw: 0100000000000200 ffff88800879fc80 ffffea00003635c0 dead00000000000b [ 33.252719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a167f01 [ 33.253687] page dumped because: kasan: bad access detected [ 33.254401] [ 33.254622] Memory state around the buggy address: [ 33.255224] ffff88800de93b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.256189] ffff88800de93b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.257136] >ffff88800de93c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.258032] ^ [ 33.258667] ffff88800de93c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.259614] ffff88800de93d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.260518] ================================================================== [ 33.261559] Disabling lock debugging due to kernel taint [ 34.978073] BUG: Bad rss-counter state mm:000000008a421ea9 type:MM_FILEPAGES val:33 [ 34.979052] BUG: Bad rss-counter state mm:000000008a421ea9 type:MM_ANONPAGES val:22 [ 35.438114] BUG: Bad rss-counter state mm:000000004f4caf6f type:MM_FILEPAGES val:33 [ 35.439271] BUG: Bad rss-counter state mm:000000004f4caf6f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52593' (ECDSA) to the list of known hosts. 2023/06/20 08:51:00 fuzzer started 2023/06/20 08:51:00 dialing manager at localhost:44161 2023/06/20 08:51:00 checking machine... 2023/06/20 08:51:00 checking revisions... [ 36.191098] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:51:00 testing simple program... [ 36.250688] cgroup: Unknown subsys name 'net' [ 36.303370] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:50:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888016c4f4e8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000a9700000a97 R12=0000000000000000 R13=ffffffff83ab421f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff812d8a0e 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 00007f5535af4900 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=00007ffd5509d000 CR3=000000000e5a4000 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=0000006f730074696d7265705f6d6170 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=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=00007fbc2406a0c0 CR3=0000000009a54000 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=afa1944704578eba01411eb40db4fbc2 XMM02=2c67c8bc2e329bc3000000000011fc98 XMM03=fb795ef6d65770560000000000124438 XMM04=87b9f1ceb6f388f100000000000ae988 XMM05=dfcdbad4f1609c370000000000133f28 XMM06=a65ff1ad4c997e9b0000000000132d90 XMM07=e042d86d42eb936e00000000001246b8 XMM08=8db5ba68dc3b0cdd000000000011fcf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000