syzkaller login: [ 29.881732] BUG: Bad rss-counter state mm:000000008a9c237d type:MM_FILEPAGES val:33 [ 29.883185] BUG: Bad rss-counter state mm:000000008a9c237d type:MM_ANONPAGES val:22 [ 30.035830] ================================================================== [ 30.036724] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.037676] Read of size 8 at addr ffff88800d9ada50 by task sshd/219 [ 30.038537] [ 30.038760] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.039631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.040684] Call Trace: [ 30.041146] [ 30.041494] dump_stack_lvl+0x91/0xf0 [ 30.042078] print_report+0xcc/0x620 [ 30.042662] ? __virt_addr_valid+0x102/0x340 [ 30.043324] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.044069] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.044836] kasan_report+0xbe/0xf0 [ 30.045433] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.046160] vma_interval_tree_remove+0xc75/0xec0 [ 30.046880] vma_prepare+0xc54/0x11a0 [ 30.047448] __split_vma+0x5af/0x950 [ 30.048005] ? __pfx___split_vma+0x10/0x10 [ 30.048629] ? find_held_lock+0x2c/0x110 [ 30.049306] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.049901] ? lock_is_held_type+0x9f/0x120 [ 30.050427] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.051019] ? mtree_range_walk+0x632/0x900 [ 30.051553] ? mas_walk+0x5c7/0x7c0 [ 30.052018] do_vmi_munmap+0x1f1/0x2b0 [ 30.052499] mmap_region+0x1f9/0x2660 [ 30.053018] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.053521] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.054236] ? __pfx_lock_acquire+0x10/0x10 [ 30.054767] ? __pfx_mmap_region+0x10/0x10 [ 30.055292] ? security_mmap_addr+0x7d/0xa0 [ 30.055820] ? get_unmapped_area+0x1f5/0x3f0 [ 30.056366] do_mmap+0x854/0xf00 [ 30.056818] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.057352] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.057918] ksys_mmap_pgoff+0x3af/0x500 [ 30.058423] do_syscall_64+0x3f/0x90 [ 30.058898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.059541] RIP: 0033:0x7faa396fcd82 [ 30.059995] 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 [ 30.062191] RSP: 002b:00007ffeab412898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.063099] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa396fcd82 [ 30.063944] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa38b36000 [ 30.064787] RBP: 00007faa38b36000 R08: 0000000000000009 R09: 0000000000001000 [ 30.065651] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f164991f70 [ 30.066534] R13: 00007ffeab4128b0 R14: 00007ffeab4128e0 R15: 00007ffeab412c40 [ 30.067391] [ 30.067681] [ 30.067892] Allocated by task 212: [ 30.068321] kasan_save_stack+0x22/0x50 [ 30.068825] kasan_set_track+0x25/0x30 [ 30.069337] __kasan_slab_alloc+0x59/0x70 [ 30.069899] kmem_cache_alloc+0x16b/0x370 [ 30.070423] vm_area_dup+0x20/0x160 [ 30.070874] __split_vma+0x170/0x950 [ 30.071340] split_vma+0xc6/0x110 [ 30.071777] mprotect_fixup+0x8d2/0xb30 [ 30.072281] do_mprotect_pkey+0x87e/0xd40 [ 30.072798] __x64_sys_mprotect+0x78/0xc0 [ 30.073333] do_syscall_64+0x3f/0x90 [ 30.073820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.074491] [ 30.074708] Freed by task 212: [ 30.075237] kasan_save_stack+0x22/0x50 [ 30.075759] kasan_set_track+0x25/0x30 [ 30.076271] kasan_save_free_info+0x2b/0x50 [ 30.076825] __kasan_slab_free+0x10a/0x190 [ 30.077400] kmem_cache_free+0x10d/0x4d0 [ 30.077957] rcu_core+0x8c8/0x2860 [ 30.078426] __do_softirq+0x1b7/0x7d4 [ 30.078920] [ 30.079141] Last potentially related work creation: [ 30.079746] kasan_save_stack+0x22/0x50 [ 30.080284] __kasan_record_aux_stack+0x8e/0xa0 [ 30.080872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.081545] remove_vma+0x139/0x170 [ 30.082038] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.082612] do_vmi_munmap+0x1f1/0x2b0 [ 30.083111] __vm_munmap+0x138/0x3a0 [ 30.083589] __x64_sys_munmap+0x59/0x80 [ 30.084095] do_syscall_64+0x3f/0x90 [ 30.084583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.085243] [ 30.085462] The buggy address belongs to the object at ffff88800d9ad9f8 [ 30.085462] which belongs to the cache vm_area_struct of size 168 [ 30.086985] The buggy address is located 88 bytes inside of [ 30.086985] freed 168-byte region [ffff88800d9ad9f8, ffff88800d9adaa0) [ 30.088421] [ 30.088638] The buggy address belongs to the physical page: [ 30.089331] page:000000005bf1916c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9ad [ 30.090455] memcg:ffff88800ca8e101 [ 30.090888] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.091546] page_type: 0xffffffff() [ 30.092028] raw: 0100000000000200 ffff88800879fc80 ffffea00003263c0 dead00000000000a [ 30.092976] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca8e101 [ 30.093944] page dumped because: kasan: bad access detected [ 30.094625] [ 30.094848] Memory state around the buggy address: [ 30.095445] ffff88800d9ad900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.096336] ffff88800d9ad980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.097236] >ffff88800d9ada00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.098138] ^ [ 30.098845] ffff88800d9ada80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.099727] ffff88800d9adb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.100603] ================================================================== [ 30.102048] Disabling lock debugging due to kernel taint [ 31.919368] BUG: Bad rss-counter state mm:00000000ed607276 type:MM_FILEPAGES val:33 [ 31.920443] BUG: Bad rss-counter state mm:00000000ed607276 type:MM_ANONPAGES val:22 [ 32.352580] BUG: Bad rss-counter state mm:0000000039e2c8f8 type:MM_FILEPAGES val:33 [ 32.353720] BUG: Bad rss-counter state mm:0000000039e2c8f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42600' (ECDSA) to the list of known hosts. 2023/06/19 10:52:02 fuzzer started 2023/06/19 10:52:03 dialing manager at localhost:44161 2023/06/19 10:52:03 checking machine... 2023/06/19 10:52:03 checking revisions... [ 33.064946] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:52:03 testing simple program... [ 33.116909] cgroup: Unknown subsys name 'net' [ 33.156755] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:52:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86141d62 RDX=ffff888019f5f9c0 RSI=ffff888019f5fe50 RDI=ffff888019f5f9c0 RBP=ffff888019f5fa18 RSP=ffff888019f5f928 R8 =ffffffff86141d66 R9 =ffff888019f5fa00 R10=0000000000038001 R11=0000000000022999 R12=0000000000000008 R13=ffff888019f5fa08 R14=ffff888019f5fe58 R15=ffff888019f5f9c0 RIP=ffffffff81130407 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 00007ff785e17900 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=00007ffd350d3000 CR3=000000000e9ba000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813782a8 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff813782a8 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888013560ec0 RIP=ffffffff813ad424 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 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=00007f3ab274eb70 CR3=000000000da90000 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=2032303a32353a3031203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a32353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000