syzkaller login: [ 31.065292] BUG: Bad rss-counter state mm:000000005e723591 type:MM_FILEPAGES val:33 [ 31.066682] BUG: Bad rss-counter state mm:000000005e723591 type:MM_ANONPAGES val:22 [ 31.208736] ================================================================== [ 31.209659] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.210604] Read of size 8 at addr ffff888019eb7880 by task sshd/220 [ 31.211385] [ 31.211606] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.212653] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.213631] Call Trace: [ 31.213957] [ 31.214271] dump_stack_lvl+0x91/0xf0 [ 31.214765] print_report+0xcc/0x620 [ 31.215253] ? __virt_addr_valid+0x102/0x340 [ 31.215817] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.216435] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217060] kasan_report+0xbe/0xf0 [ 31.217540] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.218172] vma_interval_tree_remove+0xc75/0xec0 [ 31.218781] vma_prepare+0xc54/0x11a0 [ 31.219263] __split_vma+0x5af/0x950 [ 31.219736] ? __pfx___split_vma+0x10/0x10 [ 31.220287] ? find_held_lock+0x2c/0x110 [ 31.220812] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.221384] ? lock_is_held_type+0x9f/0x120 [ 31.221930] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.222546] ? mtree_range_walk+0x632/0x900 [ 31.223104] ? mas_walk+0x5c7/0x7c0 [ 31.223583] do_vmi_munmap+0x1f1/0x2b0 [ 31.224098] mmap_region+0x1f9/0x2660 [ 31.224588] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.225099] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.225818] ? __pfx_lock_acquire+0x10/0x10 [ 31.226356] ? __pfx_mmap_region+0x10/0x10 [ 31.226891] ? security_mmap_addr+0x7d/0xa0 [ 31.227425] ? get_unmapped_area+0x1f5/0x3f0 [ 31.227988] do_mmap+0x854/0xf00 [ 31.228431] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.228933] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.229502] ksys_mmap_pgoff+0x3af/0x500 [ 31.230013] do_syscall_64+0x3f/0x90 [ 31.230497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231143] RIP: 0033:0x7fcbe4b5ed82 [ 31.231606] 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 [ 31.233772] RSP: 002b:00007ffc6b604dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.234705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcbe4b5ed82 [ 31.235567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcbe3f98000 [ 31.236441] RBP: 00007fcbe3f98000 R08: 0000000000000009 R09: 0000000000001000 [ 31.237303] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d166358ec0 [ 31.238161] R13: 00007ffc6b604de0 R14: 00007ffc6b604e10 R15: 00007ffc6b605170 [ 31.239046] [ 31.239338] [ 31.239553] Allocated by task 213: [ 31.239999] kasan_save_stack+0x22/0x50 [ 31.240514] kasan_set_track+0x25/0x30 [ 31.241029] __kasan_slab_alloc+0x59/0x70 [ 31.241558] kmem_cache_alloc+0x16b/0x370 [ 31.242092] vm_area_dup+0x20/0x160 [ 31.242557] __split_vma+0x170/0x950 [ 31.243032] split_vma+0xc6/0x110 [ 31.243477] mprotect_fixup+0x8d2/0xb30 [ 31.244005] do_mprotect_pkey+0x87e/0xd40 [ 31.244537] __x64_sys_mprotect+0x78/0xc0 [ 31.245078] do_syscall_64+0x3f/0x90 [ 31.245556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246207] [ 31.246433] Freed by task 203: [ 31.246828] kasan_save_stack+0x22/0x50 [ 31.247339] kasan_set_track+0x25/0x30 [ 31.247848] kasan_save_free_info+0x2b/0x50 [ 31.248381] __kasan_slab_free+0x10a/0x190 [ 31.248940] kmem_cache_free+0x10d/0x4d0 [ 31.249451] rcu_core+0x8c8/0x2860 [ 31.249901] __do_softirq+0x1b7/0x7d4 [ 31.250389] [ 31.250604] Last potentially related work creation: [ 31.251193] kasan_save_stack+0x22/0x50 [ 31.251718] __kasan_record_aux_stack+0x8e/0xa0 [ 31.252305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.252961] remove_vma+0x139/0x170 [ 31.253510] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.254081] do_vmi_munmap+0x1f1/0x2b0 [ 31.254578] __vm_munmap+0x138/0x3a0 [ 31.255054] __x64_sys_munmap+0x59/0x80 [ 31.255552] do_syscall_64+0x3f/0x90 [ 31.256051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256713] [ 31.256931] The buggy address belongs to the object at ffff888019eb7828 [ 31.256931] which belongs to the cache vm_area_struct of size 168 [ 31.258418] The buggy address is located 88 bytes inside of [ 31.258418] freed 168-byte region [ffff888019eb7828, ffff888019eb78d0) [ 31.259854] [ 31.260073] The buggy address belongs to the physical page: [ 31.260747] page:00000000502ef944 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19eb7 [ 31.261853] memcg:ffff88800e1f1301 [ 31.262282] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.262932] page_type: 0xffffffff() [ 31.263388] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.264333] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1f1301 [ 31.265243] page dumped because: kasan: bad access detected [ 31.265918] [ 31.266138] Memory state around the buggy address: [ 31.266722] ffff888019eb7780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.267594] ffff888019eb7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.268456] >ffff888019eb7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.269313] ^ [ 31.269722] ffff888019eb7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.270596] ffff888019eb7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.271462] ================================================================== [ 31.272586] Disabling lock debugging due to kernel taint [ 33.285722] BUG: Bad rss-counter state mm:00000000ee6c2054 type:MM_FILEPAGES val:33 [ 33.287156] BUG: Bad rss-counter state mm:00000000ee6c2054 type:MM_ANONPAGES val:22 [ 33.750802] BUG: Bad rss-counter state mm:00000000d5b03405 type:MM_FILEPAGES val:33 [ 33.751791] BUG: Bad rss-counter state mm:00000000d5b03405 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43591' (ECDSA) to the list of known hosts. 2023/06/20 06:09:22 fuzzer started 2023/06/20 06:09:23 dialing manager at localhost:44161 2023/06/20 06:09:23 checking machine... 2023/06/20 06:09:23 checking revisions... [ 34.538252] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:09:23 testing simple program... [ 34.587484] cgroup: Unknown subsys name 'net' [ 34.631453] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:09:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018b3efa8 RCX=0000000000000000 RDX=ffff8880090551c0 RSI=ffffffff8198bb94 RDI=ffff888018b3f410 RBP=ffff8880189bad38 RSP=ffff888016bdf950 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000001 R12=0000000000000001 R13=0000000000010000 R14=ffff88800e1ab300 R15=ffff88800e1ab310 RIP=ffffffff8198bb94 RFL=00000293 [--S-A-C] 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 00007f029f770900 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=00007fff2ecb5000 CR3=000000001a27a000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f8a089d9000 CR3=000000000c674000 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=14c1d608c6b9f8913f495b1637806902 XMM02=ec2efd57dc4c00df000000000011e018 XMM03=0dc2b01b3bebf4da000000000011e0e8 XMM04=2f6304901dc8099a00000000000ae988 XMM05=19e9129bd510f2350000000000134d18 XMM06=c02f8b495e9e93420000000000133b80 XMM07=e042d86d42eb936e0000000000125418 XMM08=0dc2b01b3bebf4da000000000011e0e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000