syzkaller login: [ 35.144213] BUG: Bad rss-counter state mm:000000002e060d44 type:MM_FILEPAGES val:33 [ 35.144969] BUG: Bad rss-counter state mm:000000002e060d44 type:MM_ANONPAGES val:22 [ 35.272087] ================================================================== [ 35.273114] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.273859] Read of size 8 at addr ffff88800e711798 by task sshd/220 [ 35.274577] [ 35.274831] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.275557] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.276350] Call Trace: [ 35.276604] [ 35.276829] dump_stack_lvl+0x91/0xf0 [ 35.277223] print_report+0xcc/0x620 [ 35.277607] ? __virt_addr_valid+0x102/0x340 [ 35.278051] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.278545] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.279077] kasan_report+0xbe/0xf0 [ 35.279475] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.279965] vma_interval_tree_remove+0xc75/0xec0 [ 35.280458] vma_prepare+0xc54/0x11a0 [ 35.280833] __split_vma+0x5af/0x950 [ 35.281207] ? __pfx___split_vma+0x10/0x10 [ 35.281627] ? find_held_lock+0x2c/0x110 [ 35.282047] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.282498] ? lock_is_held_type+0x9f/0x120 [ 35.282935] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.283419] ? mtree_range_walk+0x632/0x900 [ 35.283859] ? mas_walk+0x5c7/0x7c0 [ 35.284256] do_vmi_munmap+0x1f1/0x2b0 [ 35.284651] mmap_region+0x1f9/0x2660 [ 35.285041] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.285448] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.286016] ? __pfx_lock_acquire+0x10/0x10 [ 35.286450] ? __pfx_mmap_region+0x10/0x10 [ 35.286873] ? security_mmap_addr+0x7d/0xa0 [ 35.287299] ? get_unmapped_area+0x1f5/0x3f0 [ 35.287742] do_mmap+0x854/0xf00 [ 35.288097] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.288504] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.288961] ksys_mmap_pgoff+0x3af/0x500 [ 35.289369] do_syscall_64+0x3f/0x90 [ 35.289751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.290266] RIP: 0033:0x7f1a3c246d82 [ 35.290637] 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 [ 35.292372] RSP: 002b:00007fffb002bb28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.293095] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a3c246d82 [ 35.293785] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a3b680000 [ 35.294472] RBP: 00007f1a3b680000 R08: 0000000000000009 R09: 0000000000001000 [ 35.295163] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0f42f4d90 [ 35.295847] R13: 00007fffb002bb40 R14: 00007fffb002bb70 R15: 00007fffb002bed0 [ 35.296548] [ 35.296787] [ 35.296961] Allocated by task 213: [ 35.297307] kasan_save_stack+0x22/0x50 [ 35.297714] kasan_set_track+0x25/0x30 [ 35.298111] __kasan_slab_alloc+0x59/0x70 [ 35.298533] kmem_cache_alloc+0x16b/0x370 [ 35.298941] vm_area_dup+0x20/0x160 [ 35.299311] __split_vma+0x170/0x950 [ 35.299690] split_vma+0xc6/0x110 [ 35.300042] mprotect_fixup+0x8d2/0xb30 [ 35.300463] do_mprotect_pkey+0x87e/0xd40 [ 35.300876] __x64_sys_mprotect+0x78/0xc0 [ 35.301288] do_syscall_64+0x3f/0x90 [ 35.301669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.302182] [ 35.302355] Freed by task 213: [ 35.302671] kasan_save_stack+0x22/0x50 [ 35.303078] kasan_set_track+0x25/0x30 [ 35.303478] kasan_save_free_info+0x2b/0x50 [ 35.303918] __kasan_slab_free+0x10a/0x190 [ 35.304359] kmem_cache_free+0x10d/0x4d0 [ 35.304765] rcu_core+0x8c8/0x2860 [ 35.305116] __do_softirq+0x1b7/0x7d4 [ 35.305511] [ 35.305684] Last potentially related work creation: [ 35.306153] kasan_save_stack+0x22/0x50 [ 35.306557] __kasan_record_aux_stack+0x8e/0xa0 [ 35.307026] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.307555] remove_vma+0x139/0x170 [ 35.307924] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.308394] do_vmi_munmap+0x1f1/0x2b0 [ 35.308787] __vm_munmap+0x138/0x3a0 [ 35.309161] __x64_sys_munmap+0x59/0x80 [ 35.309571] do_syscall_64+0x3f/0x90 [ 35.309957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.310479] [ 35.310655] Second to last potentially related work creation: [ 35.311213] kasan_save_stack+0x22/0x50 [ 35.311621] __kasan_record_aux_stack+0x8e/0xa0 [ 35.312078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.312615] remove_vma+0x139/0x170 [ 35.312987] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.313444] do_vmi_munmap+0x1f1/0x2b0 [ 35.313832] mmap_region+0x1f9/0x2660 [ 35.314223] do_mmap+0x854/0xf00 [ 35.314566] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.315053] ksys_mmap_pgoff+0x3af/0x500 [ 35.315462] do_syscall_64+0x3f/0x90 [ 35.315847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.316376] [ 35.316551] The buggy address belongs to the object at ffff88800e711740 [ 35.316551] which belongs to the cache vm_area_struct of size 168 [ 35.317801] The buggy address is located 88 bytes inside of [ 35.317801] freed 168-byte region [ffff88800e711740, ffff88800e7117e8) [ 35.318992] [ 35.319173] The buggy address belongs to the physical page: [ 35.319745] page:000000001774ab75 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe711 [ 35.320657] memcg:ffff88800dfe0b01 [ 35.321000] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.321568] page_type: 0xffffffff() [ 35.321926] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 35.322674] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfe0b01 [ 35.323401] page dumped because: kasan: bad access detected [ 35.323936] [ 35.324128] Memory state around the buggy address: [ 35.324595] ffff88800e711680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.325301] ffff88800e711700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.325999] >ffff88800e711780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.326684] ^ [ 35.327090] ffff88800e711800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.327783] ffff88800e711880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.328499] ================================================================== [ 35.329321] Disabling lock debugging due to kernel taint [ 38.149345] BUG: Bad rss-counter state mm:00000000a65f021c type:MM_FILEPAGES val:33 [ 38.150219] BUG: Bad rss-counter state mm:00000000a65f021c type:MM_ANONPAGES val:22 [ 38.641654] BUG: Bad rss-counter state mm:0000000064aa89a0 type:MM_FILEPAGES val:33 [ 38.642872] BUG: Bad rss-counter state mm:0000000064aa89a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34395' (ECDSA) to the list of known hosts. 2023/06/20 21:03:19 fuzzer started 2023/06/20 21:03:19 dialing manager at localhost:36067 2023/06/20 21:03:19 checking machine... 2023/06/20 21:03:19 checking revisions... [ 39.377282] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:03:19 testing simple program... [ 39.424815] cgroup: Unknown subsys name 'net' [ 39.470606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:03:18 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff84537da6 RDX=0000000000000001 RSI=ffffffff864b6d1e RDI=ffffffff86051f28 RBP=ffffffff86051f28 RSP=ffff888008d9f8c0 R8 =ffffffff864b6d1e R9 =ffff888008d9f9b8 R10=0000000000038001 R11=00000000000b5d59 R12=ffffffff86051f28 R13=ffffffff86051f28 R14=ffffffff86051f28 R15=dffffc0000000000 RIP=ffffffff8112fc49 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 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=00007f566582a0b0 CR3=000000000ff18000 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=33303a3132203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303735 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86091f84 RDX=1ffff1100d9e135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86091f88 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000005 R15=ffff88806cf09a98 RIP=ffffffff81130b54 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 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=00007fe9b7299b10 CR3=0000000013b6a000 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=92f3422850d22bb4f7468304574f4b48 XMM02=000000000011f3f8ec2efd57dc4c00df XMM03=00000000001220f00d4e6bbfb0bdbbad XMM04=326b4ca698d6a6e000000000000ae988 XMM05=19e9129bd510f2350000000000132f40 XMM06=2fe0209bc29824c60000000000132118 XMM07=e042d86d42eb936e00000000001223c8 XMM08=0d4e6bbfb0bdbbad000000000011f458 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000