syzkaller login: [ 30.808651] BUG: Bad rss-counter state mm:00000000a5a201f6 type:MM_FILEPAGES val:33 [ 30.809987] BUG: Bad rss-counter state mm:00000000a5a201f6 type:MM_ANONPAGES val:22 [ 30.846761] ================================================================== [ 30.847785] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.848813] Read of size 8 at addr ffff888015a73880 by task sshd/221 [ 30.849655] [ 30.849877] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.850769] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.851791] Call Trace: [ 30.852128] [ 30.852426] dump_stack_lvl+0x91/0xf0 [ 30.852942] print_report+0xcc/0x620 [ 30.853449] ? __virt_addr_valid+0x102/0x340 [ 30.854011] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854655] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855289] kasan_report+0xbe/0xf0 [ 30.855781] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.856421] vma_interval_tree_remove+0xc75/0xec0 [ 30.857063] vma_prepare+0xc54/0x11a0 [ 30.857570] __split_vma+0x5af/0x950 [ 30.858061] ? __pfx___split_vma+0x10/0x10 [ 30.858611] ? find_held_lock+0x2c/0x110 [ 30.859157] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.859754] ? lock_is_held_type+0x9f/0x120 [ 30.860314] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.860960] ? mtree_range_walk+0x632/0x900 [ 30.861531] ? mas_walk+0x5c7/0x7c0 [ 30.862020] do_vmi_munmap+0x1f1/0x2b0 [ 30.862538] mmap_region+0x1f9/0x2660 [ 30.863041] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.863570] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.864316] ? __pfx_lock_acquire+0x10/0x10 [ 30.864889] ? __pfx_mmap_region+0x10/0x10 [ 30.865452] ? security_mmap_addr+0x7d/0xa0 [ 30.866003] ? get_unmapped_area+0x1f5/0x3f0 [ 30.866583] do_mmap+0x854/0xf00 [ 30.867037] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.867552] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.868111] ksys_mmap_pgoff+0x3af/0x500 [ 30.868636] do_syscall_64+0x3f/0x90 [ 30.869131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869777] RIP: 0033:0x7fdbd2b8ad82 [ 30.870235] 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 [ 30.872366] RSP: 002b:00007ffd72eacaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.873289] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbd2b8ad82 [ 30.874139] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbd1fc4000 [ 30.874987] RBP: 00007fdbd1fc4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.875841] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4c81c1ec0 [ 30.876688] R13: 00007ffd72eacac0 R14: 00007ffd72eacaf0 R15: 00007ffd72eace50 [ 30.877553] [ 30.877846] [ 30.878059] Allocated by task 214: [ 30.878485] kasan_save_stack+0x22/0x50 [ 30.878983] kasan_set_track+0x25/0x30 [ 30.879474] __kasan_slab_alloc+0x59/0x70 [ 30.879990] kmem_cache_alloc+0x16b/0x370 [ 30.880500] vm_area_dup+0x20/0x160 [ 30.880966] __split_vma+0x170/0x950 [ 30.881429] split_vma+0xc6/0x110 [ 30.881862] mprotect_fixup+0x8d2/0xb30 [ 30.882363] do_mprotect_pkey+0x87e/0xd40 [ 30.882881] __x64_sys_mprotect+0x78/0xc0 [ 30.883405] do_syscall_64+0x3f/0x90 [ 30.883875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884518] [ 30.884732] Freed by task 214: [ 30.885129] kasan_save_stack+0x22/0x50 [ 30.885632] kasan_set_track+0x25/0x30 [ 30.886121] kasan_save_free_info+0x2b/0x50 [ 30.886657] __kasan_slab_free+0x10a/0x190 [ 30.887187] kmem_cache_free+0x10d/0x4d0 [ 30.887698] rcu_core+0x8c8/0x2860 [ 30.888136] __do_softirq+0x1b7/0x7d4 [ 30.888624] [ 30.888857] Last potentially related work creation: [ 30.889448] kasan_save_stack+0x22/0x50 [ 30.889950] __kasan_record_aux_stack+0x8e/0xa0 [ 30.890516] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.891150] remove_vma+0x139/0x170 [ 30.891605] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.892161] do_vmi_munmap+0x1f1/0x2b0 [ 30.892646] __vm_munmap+0x138/0x3a0 [ 30.893124] __x64_sys_munmap+0x59/0x80 [ 30.893616] do_syscall_64+0x3f/0x90 [ 30.894086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894734] [ 30.894952] The buggy address belongs to the object at ffff888015a73828 [ 30.894952] which belongs to the cache vm_area_struct of size 168 [ 30.896419] The buggy address is located 88 bytes inside of [ 30.896419] freed 168-byte region [ffff888015a73828, ffff888015a738d0) [ 30.897895] [ 30.898120] The buggy address belongs to the physical page: [ 30.898782] page:000000001c939ebc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a73 [ 30.899869] memcg:ffff8880184c2101 [ 30.900290] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.900956] page_type: 0xffffffff() [ 30.901405] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.902317] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880184c2101 [ 30.903212] page dumped because: kasan: bad access detected [ 30.903866] [ 30.904082] Memory state around the buggy address: [ 30.904663] ffff888015a73780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.905533] ffff888015a73800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.906382] >ffff888015a73880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.907228] ^ [ 30.907639] ffff888015a73900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.908486] ffff888015a73980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.909359] ================================================================== [ 30.910437] Disabling lock debugging due to kernel taint [ 32.869503] BUG: Bad rss-counter state mm:000000008bca8e5c type:MM_FILEPAGES val:33 [ 32.870702] BUG: Bad rss-counter state mm:000000008bca8e5c type:MM_ANONPAGES val:22 [ 33.304498] BUG: Bad rss-counter state mm:000000008bf5ab99 type:MM_FILEPAGES val:33 [ 33.305597] BUG: Bad rss-counter state mm:000000008bf5ab99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42909' (ECDSA) to the list of known hosts. 2023/06/21 02:01:44 fuzzer started 2023/06/21 02:01:44 dialing manager at localhost:36067 2023/06/21 02:01:44 checking machine... 2023/06/21 02:01:44 checking revisions... [ 33.991491] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:01:44 testing simple program... [ 34.037697] cgroup: Unknown subsys name 'net' [ 34.080733] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:01:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88801677f740 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=ff00545000000000 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff11002cefee9 RIP=ffffffff845368c8 RFL=00000002 [-------] 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 00007f2e39d41900 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=00007f2e3a2f8618 CR3=000000000da9c000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f1185b21970 CR3=000000000c7ba000 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=9d7766a3e8b6458f554b08ee0fa1ae36 XMM02=000000000011ac38ec2efd57dc4c00df XMM03=0000000000121a180688dfc8282ba849 XMM04=7ff74af5c9bdd8ff00000000000ae988 XMM05=e4cb8bb95a7664b600000000001317d0 XMM06=8833cf583926f2630000000000130638 XMM07=e042d86d42eb936e0000000000121c98 XMM08=0688dfc8282ba849000000000011ac98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000