syzkaller login: [ 37.194056] BUG: Bad rss-counter state mm:00000000b9142423 type:MM_FILEPAGES val:33 [ 37.195255] BUG: Bad rss-counter state mm:00000000b9142423 type:MM_ANONPAGES val:22 [ 37.341114] ================================================================== [ 37.342012] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.342945] Read of size 8 at addr ffff88800d26a3f8 by task sshd/220 [ 37.343819] [ 37.344036] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.344913] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.345892] Call Trace: [ 37.346209] [ 37.346491] dump_stack_lvl+0x91/0xf0 [ 37.346982] print_report+0xcc/0x620 [ 37.347466] ? __virt_addr_valid+0x102/0x340 [ 37.348023] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.348662] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.349285] kasan_report+0xbe/0xf0 [ 37.349764] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.350383] vma_interval_tree_remove+0xc75/0xec0 [ 37.350985] vma_prepare+0xc54/0x11a0 [ 37.351464] __split_vma+0x5af/0x950 [ 37.351948] ? __pfx___split_vma+0x10/0x10 [ 37.352476] ? find_held_lock+0x2c/0x110 [ 37.353017] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.353595] ? lock_is_held_type+0x9f/0x120 [ 37.354143] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.354750] ? mtree_range_walk+0x632/0x900 [ 37.355301] ? mas_walk+0x5c7/0x7c0 [ 37.355784] do_vmi_munmap+0x1f1/0x2b0 [ 37.356276] mmap_region+0x1f9/0x2660 [ 37.356775] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.357293] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.358000] ? __pfx_lock_acquire+0x10/0x10 [ 37.358538] ? __pfx_mmap_region+0x10/0x10 [ 37.359071] ? security_mmap_addr+0x7d/0xa0 [ 37.359606] ? get_unmapped_area+0x1f5/0x3f0 [ 37.360172] do_mmap+0x854/0xf00 [ 37.360623] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.361121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.361685] ksys_mmap_pgoff+0x3af/0x500 [ 37.362196] do_syscall_64+0x3f/0x90 [ 37.362682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.363335] RIP: 0033:0x7f1298960d82 [ 37.363804] 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 [ 37.366023] RSP: 002b:00007fff7d0fb048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.366912] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1298960d82 [ 37.367753] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1297d9a000 [ 37.368633] RBP: 00007f1297d9a000 R08: 0000000000000009 R09: 0000000000001000 [ 37.369479] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd49f9db20 [ 37.370334] R13: 00007fff7d0fb060 R14: 00007fff7d0fb090 R15: 00007fff7d0fb3f0 [ 37.371198] [ 37.371495] [ 37.371708] Allocated by task 213: [ 37.372144] kasan_save_stack+0x22/0x50 [ 37.372664] kasan_set_track+0x25/0x30 [ 37.373168] __kasan_slab_alloc+0x59/0x70 [ 37.373688] kmem_cache_alloc+0x16b/0x370 [ 37.374209] vm_area_dup+0x20/0x160 [ 37.374670] __split_vma+0x170/0x950 [ 37.375136] split_vma+0xc6/0x110 [ 37.375578] mprotect_fixup+0x8d2/0xb30 [ 37.376084] do_mprotect_pkey+0x87e/0xd40 [ 37.376618] __x64_sys_mprotect+0x78/0xc0 [ 37.377143] do_syscall_64+0x3f/0x90 [ 37.377620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.378262] [ 37.378480] Freed by task 213: [ 37.378878] kasan_save_stack+0x22/0x50 [ 37.379387] kasan_set_track+0x25/0x30 [ 37.379882] kasan_save_free_info+0x2b/0x50 [ 37.380421] __kasan_slab_free+0x10a/0x190 [ 37.380985] kmem_cache_free+0x10d/0x4d0 [ 37.381496] rcu_core+0x8c8/0x2860 [ 37.381942] __do_softirq+0x1b7/0x7d4 [ 37.382417] [ 37.382636] Last potentially related work creation: [ 37.383227] kasan_save_stack+0x22/0x50 [ 37.383733] __kasan_record_aux_stack+0x8e/0xa0 [ 37.384315] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.384989] remove_vma+0x139/0x170 [ 37.385444] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.386008] do_vmi_munmap+0x1f1/0x2b0 [ 37.386494] __vm_munmap+0x138/0x3a0 [ 37.386966] __x64_sys_munmap+0x59/0x80 [ 37.387465] do_syscall_64+0x3f/0x90 [ 37.387941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.388587] [ 37.388800] The buggy address belongs to the object at ffff88800d26a3a0 [ 37.388800] which belongs to the cache vm_area_struct of size 168 [ 37.390278] The buggy address is located 88 bytes inside of [ 37.390278] freed 168-byte region [ffff88800d26a3a0, ffff88800d26a448) [ 37.391694] [ 37.391913] The buggy address belongs to the physical page: [ 37.392586] page:00000000c5143403 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd26a [ 37.393677] memcg:ffff88800cfecc01 [ 37.394105] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.394758] page_type: 0xffffffff() [ 37.395218] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.396145] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfecc01 [ 37.397071] page dumped because: kasan: bad access detected [ 37.397733] [ 37.397952] Memory state around the buggy address: [ 37.398529] ffff88800d26a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 37.399395] ffff88800d26a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 37.400253] >ffff88800d26a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 37.401113] ^ [ 37.402028] ffff88800d26a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 37.402926] ffff88800d26a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.403781] ================================================================== [ 37.404956] Disabling lock debugging due to kernel taint [ 39.258166] BUG: Bad rss-counter state mm:00000000d5832aa8 type:MM_FILEPAGES val:33 [ 39.259285] BUG: Bad rss-counter state mm:00000000d5832aa8 type:MM_ANONPAGES val:22 [ 39.649686] BUG: Bad rss-counter state mm:00000000b1c338a9 type:MM_FILEPAGES val:33 [ 39.651063] BUG: Bad rss-counter state mm:00000000b1c338a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46522' (ECDSA) to the list of known hosts. 2023/06/19 19:28:28 fuzzer started 2023/06/19 19:28:28 dialing manager at localhost:44161 2023/06/19 19:28:28 checking machine... 2023/06/19 19:28:28 checking revisions... [ 40.273409] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:28:28 testing simple program... [ 40.326890] cgroup: Unknown subsys name 'net' [ 40.388077] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:28:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ffaf290 RCX=0000000000000001 RDX=1ffff11001ff5e54 RSI=ffff88800ffafb10 RDI=ffff88800ffaf2a0 RBP=ffff88800ffafb10 RSP=ffff88800ffaf1e8 R8 =ffffffff863dcb94 R9 =ffff88800ffaf2d0 R10=0000000000038001 R11=0000000000091bf6 R12=0000000000000008 R13=ffff88800ffa8000 R14=ffff88800ffafb18 R15=ffff88800ffaf290 RIP=ffffffff81130468 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 00007ffa1ae9b900 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=00007ffffbe60000 CR3=000000000dce6000 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=5320444f4854454d5f54505952434e45 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=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e1353 RSI=ffffffff84531da7 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a70 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88806cf09a98 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 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=00007fa667b71b98 CR3=000000000e368000 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=2037323a38323a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a38323a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000