syzkaller login: [ 30.644817] BUG: Bad rss-counter state mm:00000000170b0d9e type:MM_FILEPAGES val:33 [ 30.646539] BUG: Bad rss-counter state mm:00000000170b0d9e type:MM_ANONPAGES val:22 [ 30.805228] ================================================================== [ 30.806172] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.807136] Read of size 8 at addr ffff88800e199310 by task sshd/221 [ 30.807919] [ 30.808234] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.809154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.810129] Call Trace: [ 30.810451] [ 30.810743] dump_stack_lvl+0x91/0xf0 [ 30.811257] print_report+0xcc/0x620 [ 30.811748] ? __virt_addr_valid+0x102/0x340 [ 30.812303] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.812925] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.813539] kasan_report+0xbe/0xf0 [ 30.814015] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.814652] vma_interval_tree_remove+0xc75/0xec0 [ 30.815294] vma_prepare+0xc54/0x11a0 [ 30.815775] __split_vma+0x5af/0x950 [ 30.816248] ? __pfx___split_vma+0x10/0x10 [ 30.816795] ? find_held_lock+0x2c/0x110 [ 30.817330] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.817899] ? lock_is_held_type+0x9f/0x120 [ 30.818440] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.819054] ? mtree_range_walk+0x632/0x900 [ 30.819631] ? mas_walk+0x5c7/0x7c0 [ 30.820112] do_vmi_munmap+0x1f1/0x2b0 [ 30.820615] mmap_region+0x1f9/0x2660 [ 30.821110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.821623] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.822347] ? __pfx_lock_acquire+0x10/0x10 [ 30.822892] ? __pfx_mmap_region+0x10/0x10 [ 30.823463] ? security_mmap_addr+0x7d/0xa0 [ 30.823997] ? get_unmapped_area+0x1f5/0x3f0 [ 30.824563] do_mmap+0x854/0xf00 [ 30.825011] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.825521] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.826087] ksys_mmap_pgoff+0x3af/0x500 [ 30.826612] do_syscall_64+0x3f/0x90 [ 30.827098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827781] RIP: 0033:0x7f2db47f8d82 [ 30.828244] 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 [ 30.830394] RSP: 002b:00007ffe4b494a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.831348] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2db47f8d82 [ 30.832199] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2db3c32000 [ 30.833066] RBP: 00007f2db3c32000 R08: 0000000000000009 R09: 0000000000001000 [ 30.833924] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca0076bec0 [ 30.834779] R13: 00007ffe4b494a40 R14: 00007ffe4b494a70 R15: 00007ffe4b494dd0 [ 30.835658] [ 30.835954] [ 30.836175] Allocated by task 214: [ 30.836615] kasan_save_stack+0x22/0x50 [ 30.837126] kasan_set_track+0x25/0x30 [ 30.837624] __kasan_slab_alloc+0x59/0x70 [ 30.838156] kmem_cache_alloc+0x16b/0x370 [ 30.838688] vm_area_dup+0x20/0x160 [ 30.839176] __split_vma+0x170/0x950 [ 30.839645] split_vma+0xc6/0x110 [ 30.840099] mprotect_fixup+0x8d2/0xb30 [ 30.840602] do_mprotect_pkey+0x87e/0xd40 [ 30.841132] __x64_sys_mprotect+0x78/0xc0 [ 30.841670] do_syscall_64+0x3f/0x90 [ 30.842155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.842804] [ 30.843019] Freed by task 214: [ 30.843431] kasan_save_stack+0x22/0x50 [ 30.843935] kasan_set_track+0x25/0x30 [ 30.844429] kasan_save_free_info+0x2b/0x50 [ 30.844966] __kasan_slab_free+0x10a/0x190 [ 30.845507] kmem_cache_free+0x10d/0x4d0 [ 30.846022] rcu_core+0x8c8/0x2860 [ 30.846472] __do_softirq+0x1b7/0x7d4 [ 30.846954] [ 30.847174] Last potentially related work creation: [ 30.847760] kasan_save_stack+0x22/0x50 [ 30.848265] __kasan_record_aux_stack+0x8e/0xa0 [ 30.848862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.849520] remove_vma+0x139/0x170 [ 30.849978] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.850631] do_vmi_munmap+0x1f1/0x2b0 [ 30.851129] __vm_munmap+0x138/0x3a0 [ 30.851614] __x64_sys_munmap+0x59/0x80 [ 30.852121] do_syscall_64+0x3f/0x90 [ 30.852598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.853260] [ 30.853483] Second to last potentially related work creation: [ 30.854161] kasan_save_stack+0x22/0x50 [ 30.854669] __kasan_record_aux_stack+0x8e/0xa0 [ 30.855257] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855902] remove_vma+0x139/0x170 [ 30.856354] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.856911] do_vmi_munmap+0x1f1/0x2b0 [ 30.857407] mmap_region+0x1f9/0x2660 [ 30.857884] do_mmap+0x854/0xf00 [ 30.858328] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.858823] ksys_mmap_pgoff+0x3af/0x500 [ 30.859395] do_syscall_64+0x3f/0x90 [ 30.859883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.860574] [ 30.860799] The buggy address belongs to the object at ffff88800e1992b8 [ 30.860799] which belongs to the cache vm_area_struct of size 168 [ 30.862411] The buggy address is located 88 bytes inside of [ 30.862411] freed 168-byte region [ffff88800e1992b8, ffff88800e199360) [ 30.863872] [ 30.864150] The buggy address belongs to the physical page: [ 30.865026] page:00000000cef97333 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe199 [ 30.866483] memcg:ffff88800d925e01 [ 30.867052] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.867822] page_type: 0xffffffff() [ 30.868321] raw: 0100000000000200 ffff8880087a0c80 ffffea000038bac0 dead000000000004 [ 30.869278] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d925e01 [ 30.870224] page dumped because: kasan: bad access detected [ 30.870902] [ 30.871149] Memory state around the buggy address: [ 30.871740] ffff88800e199200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.872637] ffff88800e199280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.873613] >ffff88800e199300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.874486] ^ [ 30.874974] ffff88800e199380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.875850] ffff88800e199400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.876730] ================================================================== [ 30.877678] Disabling lock debugging due to kernel taint [ 32.426636] BUG: Bad rss-counter state mm:0000000082e8e9f2 type:MM_FILEPAGES val:33 [ 32.427240] BUG: Bad rss-counter state mm:0000000082e8e9f2 type:MM_ANONPAGES val:22 [ 32.792019] BUG: Bad rss-counter state mm:0000000065673348 type:MM_FILEPAGES val:33 [ 32.792555] BUG: Bad rss-counter state mm:0000000065673348 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4962' (ECDSA) to the list of known hosts. 2023/06/20 14:12:41 fuzzer started 2023/06/20 14:12:41 dialing manager at localhost:36067 2023/06/20 14:12:41 checking machine... 2023/06/20 14:12:41 checking revisions... [ 33.511443] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:12:41 testing simple program... [ 33.556004] cgroup: Unknown subsys name 'net' [ 33.602796] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:12:41 Registers: info registers vcpu 0 RAX=ffff888008da0001 RBX=ffff888008d9ff58 RCX=0000000000000001 RDX=ffff888008d9ff60 RSI=ffff888008d9ff28 RDI=ffff888008d9f968 RBP=ffff888008d98000 RSP=ffff888008d9f8e8 R8 =0000000000000001 R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008d9f9b8 R13=ffff888008d9f9a0 R14=ffff888008d9ff28 R15=ffff888008d9f958 RIP=ffffffff81131cda RFL=00000202 [-------] 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 0000000000000000 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=00007f2f0e6cb008 CR3=000000000f046000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f59710ea590 CR3=000000000d84a000 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=77133fe074f986a0bd438853637bda5a XMM02=ec2efd57dc4c00df000000000011ab58 XMM03=0b71b0b88c91e496000000000011ac28 XMM04=a6936a9382967a9d00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133218 XMM06=cbd9c8a80513a9580000000000132080 XMM07=e042d86d42eb936e00000000001222e8 XMM08=0b71b0b88c91e496000000000011ac28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000