syzkaller login: [ 31.348485] BUG: Bad rss-counter state mm:0000000079293297 type:MM_FILEPAGES val:33 [ 31.349859] BUG: Bad rss-counter state mm:0000000079293297 type:MM_ANONPAGES val:22 [ 31.501408] ================================================================== [ 31.502498] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.503435] Read of size 8 at addr ffff888018ed2ed8 by task sshd/225 [ 31.504302] [ 31.504519] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.505370] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.506388] Call Trace: [ 31.506706] [ 31.506993] dump_stack_lvl+0x91/0xf0 [ 31.507484] print_report+0xcc/0x620 [ 31.507969] ? __virt_addr_valid+0x102/0x340 [ 31.508520] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.509133] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.509754] kasan_report+0xbe/0xf0 [ 31.510234] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.510876] vma_interval_tree_remove+0xc75/0xec0 [ 31.511479] vma_prepare+0xc54/0x11a0 [ 31.511957] __split_vma+0x5af/0x950 [ 31.512428] ? __pfx___split_vma+0x10/0x10 [ 31.512964] ? find_held_lock+0x2c/0x110 [ 31.513487] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.514050] ? lock_is_held_type+0x9f/0x120 [ 31.514598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.515210] ? mtree_range_walk+0x632/0x900 [ 31.515765] ? mas_walk+0x5c7/0x7c0 [ 31.516246] do_vmi_munmap+0x1f1/0x2b0 [ 31.516743] mmap_region+0x1f9/0x2660 [ 31.517231] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.517744] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.518466] ? __pfx_lock_acquire+0x10/0x10 [ 31.518999] ? __pfx_mmap_region+0x10/0x10 [ 31.519531] ? security_mmap_addr+0x7d/0xa0 [ 31.520067] ? get_unmapped_area+0x1f5/0x3f0 [ 31.520618] do_mmap+0x854/0xf00 [ 31.521060] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.521568] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.522131] ksys_mmap_pgoff+0x3af/0x500 [ 31.522652] do_syscall_64+0x3f/0x90 [ 31.523140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.523789] RIP: 0033:0x7f7f6eb96d82 [ 31.524245] 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 [ 31.526387] RSP: 002b:00007fffc4bb9f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.527299] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f6eb96d82 [ 31.528144] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f6dfd0000 [ 31.528997] RBP: 00007f7f6dfd0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.529846] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561fefc40ec0 [ 31.530703] R13: 00007fffc4bb9f70 R14: 00007fffc4bb9fa0 R15: 00007fffc4bba300 [ 31.531562] [ 31.531860] [ 31.532076] Allocated by task 218: [ 31.532505] kasan_save_stack+0x22/0x50 [ 31.533015] kasan_set_track+0x25/0x30 [ 31.533510] __kasan_slab_alloc+0x59/0x70 [ 31.534037] kmem_cache_alloc+0x16b/0x370 [ 31.534569] vm_area_dup+0x20/0x160 [ 31.535031] __split_vma+0x170/0x950 [ 31.535500] split_vma+0xc6/0x110 [ 31.535941] mprotect_fixup+0x8d2/0xb30 [ 31.536445] do_mprotect_pkey+0x87e/0xd40 [ 31.536969] __x64_sys_mprotect+0x78/0xc0 [ 31.537483] do_syscall_64+0x3f/0x90 [ 31.537960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.538624] [ 31.538837] Freed by task 13: [ 31.539218] kasan_save_stack+0x22/0x50 [ 31.539722] kasan_set_track+0x25/0x30 [ 31.540217] kasan_save_free_info+0x2b/0x50 [ 31.540753] __kasan_slab_free+0x10a/0x190 [ 31.541289] kmem_cache_free+0x10d/0x4d0 [ 31.541797] rcu_core+0x8c8/0x2860 [ 31.542243] __do_softirq+0x1b7/0x7d4 [ 31.542746] [ 31.542958] Last potentially related work creation: [ 31.543552] kasan_save_stack+0x22/0x50 [ 31.544058] __kasan_record_aux_stack+0x8e/0xa0 [ 31.544640] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.545283] remove_vma+0x139/0x170 [ 31.545734] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.546300] do_vmi_munmap+0x1f1/0x2b0 [ 31.546784] __vm_munmap+0x138/0x3a0 [ 31.547256] __x64_sys_munmap+0x59/0x80 [ 31.547761] do_syscall_64+0x3f/0x90 [ 31.548242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.548900] [ 31.549116] The buggy address belongs to the object at ffff888018ed2e80 [ 31.549116] which belongs to the cache vm_area_struct of size 168 [ 31.550608] The buggy address is located 88 bytes inside of [ 31.550608] freed 168-byte region [ffff888018ed2e80, ffff888018ed2f28) [ 31.552011] [ 31.552232] The buggy address belongs to the physical page: [ 31.552890] page:000000009ddaab00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ed2 [ 31.553985] memcg:ffff88800dd22601 [ 31.554434] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.555094] page_type: 0xffffffff() [ 31.555546] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.556459] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd22601 [ 31.557364] page dumped because: kasan: bad access detected [ 31.558025] [ 31.558242] Memory state around the buggy address: [ 31.558824] ffff888018ed2d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.559683] ffff888018ed2e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.560548] >ffff888018ed2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.561407] ^ [ 31.562138] ffff888018ed2f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.563011] ffff888018ed2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.563865] ================================================================== [ 31.564852] Disabling lock debugging due to kernel taint [ 33.322340] BUG: Bad rss-counter state mm:00000000eefefd02 type:MM_FILEPAGES val:33 [ 33.323512] BUG: Bad rss-counter state mm:00000000eefefd02 type:MM_ANONPAGES val:22 [ 33.801942] BUG: Bad rss-counter state mm:000000005c7202c9 type:MM_FILEPAGES val:33 [ 33.803615] BUG: Bad rss-counter state mm:000000005c7202c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30460' (ECDSA) to the list of known hosts. 2023/06/20 21:55:14 fuzzer started 2023/06/20 21:55:14 dialing manager at localhost:36067 2023/06/20 21:55:14 checking machine... 2023/06/20 21:55:14 checking revisions... [ 34.472998] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:55:14 testing simple program... [ 34.514508] cgroup: Unknown subsys name 'net' [ 34.557585] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:55:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e697760 RCX=0000000000000001 RDX=1ffff11001cd2eed RSI=ffffffff8366a63c RDI=ffff88800e697768 RBP=0000000000000006 RSP=ffff88800e697678 R8 =0000000000000001 R9 =ffff88800e6976d8 R10=0000000000038001 R11=0000000000020c57 R12=ffff88800e697760 R13=0000000000000000 R14=ffff88800f549b40 R15=0000000000092cc0 RIP=ffffffff813ad4cf RFL=00000287 [--S--PC] 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 00007feeb8e66900 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=00007ffc9da84000 CR3=000000000c61a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007fcfc2cac1e0 CR3=000000000b2f8000 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=2033313a35353a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a35353a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000