syzkaller login: [ 31.104670] BUG: Bad rss-counter state mm:00000000a743adb5 type:MM_FILEPAGES val:33 [ 31.105690] BUG: Bad rss-counter state mm:00000000a743adb5 type:MM_ANONPAGES val:22 [ 31.271827] ================================================================== [ 31.272927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.274041] Read of size 8 at addr ffff888015c30310 by task sshd/219 [ 31.275110] [ 31.275377] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.276395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.277591] Call Trace: [ 31.278004] [ 31.278301] dump_stack_lvl+0x91/0xf0 [ 31.278798] print_report+0xcc/0x620 [ 31.279289] ? __virt_addr_valid+0x102/0x340 [ 31.279840] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280462] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.281081] kasan_report+0xbe/0xf0 [ 31.281561] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.282192] vma_interval_tree_remove+0xc75/0xec0 [ 31.282809] vma_prepare+0xc54/0x11a0 [ 31.283292] __split_vma+0x5af/0x950 [ 31.283764] ? __pfx___split_vma+0x10/0x10 [ 31.284302] ? find_held_lock+0x2c/0x110 [ 31.284820] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.285382] ? lock_is_held_type+0x9f/0x120 [ 31.285916] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.286519] ? mtree_range_walk+0x632/0x900 [ 31.287099] ? mas_walk+0x5c7/0x7c0 [ 31.287578] do_vmi_munmap+0x1f1/0x2b0 [ 31.288075] mmap_region+0x1f9/0x2660 [ 31.288559] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.289072] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.289788] ? __pfx_lock_acquire+0x10/0x10 [ 31.290332] ? __pfx_mmap_region+0x10/0x10 [ 31.290875] ? security_mmap_addr+0x7d/0xa0 [ 31.291403] ? get_unmapped_area+0x1f5/0x3f0 [ 31.291950] do_mmap+0x854/0xf00 [ 31.292392] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.292885] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.293453] ksys_mmap_pgoff+0x3af/0x500 [ 31.293962] do_syscall_64+0x3f/0x90 [ 31.294446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295129] RIP: 0033:0x7fadd6ffcd82 [ 31.295588] 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 [ 31.297730] RSP: 002b:00007ffd56a08878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.298640] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fadd6ffcd82 [ 31.299500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fadd6436000 [ 31.300348] RBP: 00007fadd6436000 R08: 0000000000000009 R09: 0000000000001000 [ 31.301195] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9517a0ec0 [ 31.302044] R13: 00007ffd56a08890 R14: 00007ffd56a088c0 R15: 00007ffd56a08c20 [ 31.302910] [ 31.303213] [ 31.303429] Allocated by task 212: [ 31.303860] kasan_save_stack+0x22/0x50 [ 31.304366] kasan_set_track+0x25/0x30 [ 31.304857] __kasan_slab_alloc+0x59/0x70 [ 31.305382] kmem_cache_alloc+0x16b/0x370 [ 31.305898] vm_area_dup+0x20/0x160 [ 31.306351] __split_vma+0x170/0x950 [ 31.306841] split_vma+0xc6/0x110 [ 31.307283] mprotect_fixup+0x8d2/0xb30 [ 31.307789] do_mprotect_pkey+0x87e/0xd40 [ 31.308309] __x64_sys_mprotect+0x78/0xc0 [ 31.308830] do_syscall_64+0x3f/0x90 [ 31.309303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.309950] [ 31.310166] Freed by task 19: [ 31.310549] kasan_save_stack+0x22/0x50 [ 31.311058] kasan_set_track+0x25/0x30 [ 31.311554] kasan_save_free_info+0x2b/0x50 [ 31.312089] __kasan_slab_free+0x10a/0x190 [ 31.312622] kmem_cache_free+0x10d/0x4d0 [ 31.313126] rcu_core+0x8c8/0x2860 [ 31.313577] __do_softirq+0x1b7/0x7d4 [ 31.314084] [ 31.314301] Last potentially related work creation: [ 31.314917] kasan_save_stack+0x22/0x50 [ 31.315420] __kasan_record_aux_stack+0x8e/0xa0 [ 31.316075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.316733] remove_vma+0x139/0x170 [ 31.317192] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.317761] do_vmi_munmap+0x1f1/0x2b0 [ 31.318249] __vm_munmap+0x138/0x3a0 [ 31.318721] __x64_sys_munmap+0x59/0x80 [ 31.319211] do_syscall_64+0x3f/0x90 [ 31.319687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.320343] [ 31.320556] The buggy address belongs to the object at ffff888015c302b8 [ 31.320556] which belongs to the cache vm_area_struct of size 168 [ 31.322031] The buggy address is located 88 bytes inside of [ 31.322031] freed 168-byte region [ffff888015c302b8, ffff888015c30360) [ 31.323454] [ 31.323670] The buggy address belongs to the physical page: [ 31.324325] page:00000000e4dbd265 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c30 [ 31.325415] memcg:ffff88800d63c901 [ 31.325845] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.326491] page_type: 0xffffffff() [ 31.326969] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c7ec0 0000000000000004 [ 31.327887] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d63c901 [ 31.328792] page dumped because: kasan: bad access detected [ 31.329463] [ 31.329680] Memory state around the buggy address: [ 31.330268] ffff888015c30200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.331134] ffff888015c30280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.331986] >ffff888015c30300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.332837] ^ [ 31.333307] ffff888015c30380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.334170] ffff888015c30400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.335033] ================================================================== [ 31.335962] Disabling lock debugging due to kernel taint [ 34.138859] BUG: Bad rss-counter state mm:000000007a3c8629 type:MM_FILEPAGES val:33 [ 34.140084] BUG: Bad rss-counter state mm:000000007a3c8629 type:MM_ANONPAGES val:22 [ 34.578800] BUG: Bad rss-counter state mm:00000000cb0e08e1 type:MM_FILEPAGES val:33 [ 34.579608] BUG: Bad rss-counter state mm:00000000cb0e08e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53358' (ECDSA) to the list of known hosts. 2023/06/20 11:44:54 fuzzer started 2023/06/20 11:44:54 dialing manager at localhost:36067 2023/06/20 11:44:54 checking machine... 2023/06/20 11:44:54 checking revisions... [ 35.189148] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:44:54 testing simple program... [ 35.226549] cgroup: Unknown subsys name 'net' [ 35.270067] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:44:54 Registers: info registers vcpu 0 RAX=ffffea0000280f80 RBX=ffff88800a03e600 RCX=ffffea0000280e01 RDX=ffffea0000280e00 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff88801478f600 R8 =ffff88800a03e600 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000c000b R12=dffffc0000000000 R13=ffff88801478f640 R14=0000000000000000 R15=ffff88800e753c80 RIP=ffffffff8181045d 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 00007f728480a900 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=00007f7283c81a40 CR3=000000000d4d0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=89c0aa8b7897272f00000000000ae988 XMM05=1a500c04ade7027e0000000000132128 XMM06=dfcdbad4f1609c370000000000131270 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffb3e7977 RBX=ffffffff85d9837c RCX=ffffffff8117fdd8 RDX=0000000000000000 RSI=ffffffff860a039c RDI=ffffffff85d9837c RBP=ffffffff85d9837c RSP=ffff88806cf09990 R8 =ffffffff860a039c R9 =ffff88806cf09a88 R10=0000000000038001 R11=000000000000766e R12=ffffffff85d98380 R13=ffffffff85d9837c R14=ffffffff85d9837c R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f7dc925f900 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=00007f7dc9218008 CR3=00000000183dc000 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=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