syzkaller login: [ 38.754754] BUG: Bad rss-counter state mm:0000000083d7072b type:MM_FILEPAGES val:33 [ 38.755999] BUG: Bad rss-counter state mm:0000000083d7072b type:MM_ANONPAGES val:22 [ 38.871315] ================================================================== [ 38.872043] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.872813] Read of size 8 at addr ffff88800f95cdf0 by task sshd/225 [ 38.873439] [ 38.873625] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.874318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.875250] Call Trace: [ 38.875498] [ 38.875722] dump_stack_lvl+0x91/0xf0 [ 38.876123] print_report+0xcc/0x620 [ 38.876513] ? __virt_addr_valid+0x102/0x340 [ 38.876943] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.877453] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.877872] kasan_report+0xbe/0xf0 [ 38.878172] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878571] vma_interval_tree_remove+0xc75/0xec0 [ 38.878952] vma_prepare+0xc54/0x11a0 [ 38.879250] __split_vma+0x5af/0x950 [ 38.879545] ? __pfx___split_vma+0x10/0x10 [ 38.879883] ? find_held_lock+0x2c/0x110 [ 38.880218] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.880577] ? lock_is_held_type+0x9f/0x120 [ 38.880923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.881305] ? mtree_range_walk+0x632/0x900 [ 38.881662] ? mas_walk+0x5c7/0x7c0 [ 38.881967] do_vmi_munmap+0x1f1/0x2b0 [ 38.882279] mmap_region+0x1f9/0x2660 [ 38.882580] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.882898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.883353] ? __pfx_lock_acquire+0x10/0x10 [ 38.883690] ? __pfx_mmap_region+0x10/0x10 [ 38.884020] ? security_mmap_addr+0x7d/0xa0 [ 38.884349] ? get_unmapped_area+0x1f5/0x3f0 [ 38.884688] do_mmap+0x854/0xf00 [ 38.884957] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.885276] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.885635] ksys_mmap_pgoff+0x3af/0x500 [ 38.885946] do_syscall_64+0x3f/0x90 [ 38.886243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.886652] RIP: 0033:0x7fe6d1f2dd82 [ 38.886941] 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 [ 38.888286] RSP: 002b:00007ffcfe0598f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.888876] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6d1f2dd82 [ 38.889446] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6d1367000 [ 38.889990] RBP: 00007fe6d1367000 R08: 0000000000000009 R09: 0000000000001000 [ 38.890539] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634aa188ec0 [ 38.891094] R13: 00007ffcfe059910 R14: 00007ffcfe059940 R15: 00007ffcfe059ca0 [ 38.891657] [ 38.891840] [ 38.891981] Allocated by task 218: [ 38.892254] kasan_save_stack+0x22/0x50 [ 38.892553] kasan_set_track+0x25/0x30 [ 38.892843] __kasan_slab_alloc+0x59/0x70 [ 38.893154] kmem_cache_alloc+0x16b/0x370 [ 38.893471] vm_area_dup+0x20/0x160 [ 38.893764] __split_vma+0x170/0x950 [ 38.894072] split_vma+0xc6/0x110 [ 38.894358] mprotect_fixup+0x8d2/0xb30 [ 38.894679] do_mprotect_pkey+0x87e/0xd40 [ 38.895023] __x64_sys_mprotect+0x78/0xc0 [ 38.895365] do_syscall_64+0x3f/0x90 [ 38.895664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896105] [ 38.896254] Freed by task 218: [ 38.896528] kasan_save_stack+0x22/0x50 [ 38.896867] kasan_set_track+0x25/0x30 [ 38.897230] kasan_save_free_info+0x2b/0x50 [ 38.897598] __kasan_slab_free+0x10a/0x190 [ 38.897946] kmem_cache_free+0x10d/0x4d0 [ 38.898294] rcu_core+0x8c8/0x2860 [ 38.898597] __do_softirq+0x1b7/0x7d4 [ 38.898920] [ 38.899061] Last potentially related work creation: [ 38.899457] kasan_save_stack+0x22/0x50 [ 38.899803] __kasan_record_aux_stack+0x8e/0xa0 [ 38.900193] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.900636] remove_vma+0x139/0x170 [ 38.900952] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.901341] do_vmi_munmap+0x1f1/0x2b0 [ 38.901671] __vm_munmap+0x138/0x3a0 [ 38.901989] __x64_sys_munmap+0x59/0x80 [ 38.902319] do_syscall_64+0x3f/0x90 [ 38.902620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903008] [ 38.903137] The buggy address belongs to the object at ffff88800f95cd98 [ 38.903137] which belongs to the cache vm_area_struct of size 168 [ 38.904096] The buggy address is located 88 bytes inside of [ 38.904096] freed 168-byte region [ffff88800f95cd98, ffff88800f95ce40) [ 38.904948] [ 38.905071] The buggy address belongs to the physical page: [ 38.905472] page:000000000d2d7ba7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf95c [ 38.906094] memcg:ffff88800fda4801 [ 38.906342] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.906728] page_type: 0xffffffff() [ 38.906990] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.907533] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fda4801 [ 38.908069] page dumped because: kasan: bad access detected [ 38.908452] [ 38.908580] Memory state around the buggy address: [ 38.908911] ffff88800f95cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.909420] ffff88800f95cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.909915] >ffff88800f95cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.910403] ^ [ 38.910866] ffff88800f95ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.911356] ffff88800f95ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.911839] ================================================================== [ 38.912366] Disabling lock debugging due to kernel taint [ 40.776067] BUG: Bad rss-counter state mm:00000000b35ec323 type:MM_FILEPAGES val:33 [ 40.777068] BUG: Bad rss-counter state mm:00000000b35ec323 type:MM_ANONPAGES val:22 [ 41.253679] BUG: Bad rss-counter state mm:0000000009a8037f type:MM_FILEPAGES val:33 [ 41.254880] BUG: Bad rss-counter state mm:0000000009a8037f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64924' (ECDSA) to the list of known hosts. 2023/06/20 18:33:40 fuzzer started 2023/06/20 18:33:40 dialing manager at localhost:36067 2023/06/20 18:33:40 checking machine... 2023/06/20 18:33:40 checking revisions... [ 41.984679] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:33:40 testing simple program... [ 42.026645] cgroup: Unknown subsys name 'net' [ 42.063233] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:33:40 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=ffff888015a277d8 RSI=0000000000000000 RDI=ffff888015a27480 RBP=ffff888015a27518 RSP=ffff888015a27478 R8 =ffffffff86138e90 R9 =ffff888015a274c0 R10=0000000000038001 R11=0000000000020d8f R12=ffff888015a27548 R13=0000000000000000 R14=ffff88800fb8b680 R15=0000000000000000 RIP=ffffffff81130340 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f58840a4900 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=00007f5883492060 CR3=0000000008ed4000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5baaaeabc60d39c700000000000ae988 XMM05=c6524b386048339f00000000001327b8 XMM06=e7a3b750822471340000000000131590 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff844a89c4 RCX=0000000000000001 RDX=1ffff11002b1fe21 RSI=ffff8880158ff4c8 RDI=ffffffff844a89c4 RBP=ffffffff844a89c4 RSP=ffff8880158ff060 R8 =0000000000000001 R9 =ffff8880158ff0f0 R10=0000000000038001 R11=00000000000b3ce9 R12=0000000000000001 R13=0000000000000000 R14=ffff888015bf51c0 R15=0000000000000000 RIP=ffffffff811fc772 RFL=00000283 [--S---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 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=00007fa546b53028 CR3=000000000e564000 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=756e696c2d34365f3638782f62696c2f XMM01=6f732e616d7a6c62696c2f756e672d78 XMM02=00352e6f732e616d7a6c62696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000