syzkaller login: [ 31.690186] BUG: Bad rss-counter state mm:0000000031a99429 type:MM_FILEPAGES val:33 [ 31.691486] BUG: Bad rss-counter state mm:0000000031a99429 type:MM_ANONPAGES val:22 [ 31.852630] ================================================================== [ 31.853543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.854489] Read of size 8 at addr ffff88801667eed8 by task sshd/220 [ 31.855271] [ 31.855570] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.856464] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.857446] Call Trace: [ 31.857770] [ 31.858072] dump_stack_lvl+0x91/0xf0 [ 31.858572] print_report+0xcc/0x620 [ 31.859065] ? __virt_addr_valid+0x102/0x340 [ 31.859660] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.860299] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.860920] kasan_report+0xbe/0xf0 [ 31.861408] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.862047] vma_interval_tree_remove+0xc75/0xec0 [ 31.862652] vma_prepare+0xc54/0x11a0 [ 31.863157] __split_vma+0x5af/0x950 [ 31.863646] ? __pfx___split_vma+0x10/0x10 [ 31.864193] ? find_held_lock+0x2c/0x110 [ 31.864720] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.865317] ? lock_is_held_type+0x9f/0x120 [ 31.865861] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.866485] ? mtree_range_walk+0x632/0x900 [ 31.867054] ? mas_walk+0x5c7/0x7c0 [ 31.867552] do_vmi_munmap+0x1f1/0x2b0 [ 31.868057] mmap_region+0x1f9/0x2660 [ 31.868542] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.869071] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.869778] ? __pfx_lock_acquire+0x10/0x10 [ 31.870347] ? __pfx_mmap_region+0x10/0x10 [ 31.870882] ? security_mmap_addr+0x7d/0xa0 [ 31.871453] ? get_unmapped_area+0x1f5/0x3f0 [ 31.872015] do_mmap+0x854/0xf00 [ 31.872459] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.872961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.873536] ksys_mmap_pgoff+0x3af/0x500 [ 31.874063] do_syscall_64+0x3f/0x90 [ 31.874549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.875225] RIP: 0033:0x7fa9a2aded82 [ 31.875696] 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 [ 31.877830] RSP: 002b:00007fff10f9aa98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.878757] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa9a2aded82 [ 31.879640] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9a1f18000 [ 31.880501] RBP: 00007fa9a1f18000 R08: 0000000000000009 R09: 0000000000001000 [ 31.881371] R10: 0000000000000812 R11: 0000000000000206 R12: 000055610a694ec0 [ 31.882236] R13: 00007fff10f9aab0 R14: 00007fff10f9aae0 R15: 00007fff10f9ae40 [ 31.883111] [ 31.883431] [ 31.883645] Allocated by task 213: [ 31.884101] kasan_save_stack+0x22/0x50 [ 31.884619] kasan_set_track+0x25/0x30 [ 31.885131] __kasan_slab_alloc+0x59/0x70 [ 31.885659] kmem_cache_alloc+0x16b/0x370 [ 31.886191] vm_area_dup+0x20/0x160 [ 31.886647] __split_vma+0x170/0x950 [ 31.887124] split_vma+0xc6/0x110 [ 31.887577] mprotect_fixup+0x8d2/0xb30 [ 31.888109] do_mprotect_pkey+0x87e/0xd40 [ 31.888635] __x64_sys_mprotect+0x78/0xc0 [ 31.889173] do_syscall_64+0x3f/0x90 [ 31.889652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.890308] [ 31.890526] Freed by task 213: [ 31.890914] kasan_save_stack+0x22/0x50 [ 31.891451] kasan_set_track+0x25/0x30 [ 31.891949] kasan_save_free_info+0x2b/0x50 [ 31.892495] __kasan_slab_free+0x10a/0x190 [ 31.893052] kmem_cache_free+0x10d/0x4d0 [ 31.893563] rcu_core+0x8c8/0x2860 [ 31.894021] __do_softirq+0x1b7/0x7d4 [ 31.894501] [ 31.894713] Last potentially related work creation: [ 31.895312] kasan_save_stack+0x22/0x50 [ 31.895829] __kasan_record_aux_stack+0x8e/0xa0 [ 31.896424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.897076] remove_vma+0x139/0x170 [ 31.897526] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.898106] do_vmi_munmap+0x1f1/0x2b0 [ 31.898590] __vm_munmap+0x138/0x3a0 [ 31.899070] __x64_sys_munmap+0x59/0x80 [ 31.899599] do_syscall_64+0x3f/0x90 [ 31.900089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.900730] [ 31.900946] The buggy address belongs to the object at ffff88801667ee80 [ 31.900946] which belongs to the cache vm_area_struct of size 168 [ 31.902433] The buggy address is located 88 bytes inside of [ 31.902433] freed 168-byte region [ffff88801667ee80, ffff88801667ef28) [ 31.903870] [ 31.904106] The buggy address belongs to the physical page: [ 31.904758] page:00000000e29d4d75 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1667e [ 31.906152] memcg:ffff888015feac01 [ 31.906723] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.907558] page_type: 0xffffffff() [ 31.908146] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.909339] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015feac01 [ 31.910503] page dumped because: kasan: bad access detected [ 31.911375] [ 31.911647] Memory state around the buggy address: [ 31.912351] ffff88801667ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.913259] ffff88801667ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.914155] >ffff88801667ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.915008] ^ [ 31.915883] ffff88801667ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.916765] ffff88801667ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.917625] ================================================================== [ 31.918682] Disabling lock debugging due to kernel taint [ 33.893753] BUG: Bad rss-counter state mm:00000000cb773eb0 type:MM_FILEPAGES val:33 [ 33.894743] BUG: Bad rss-counter state mm:00000000cb773eb0 type:MM_ANONPAGES val:22 [ 34.448749] BUG: Bad rss-counter state mm:00000000d3f0377f type:MM_FILEPAGES val:33 [ 34.449734] BUG: Bad rss-counter state mm:00000000d3f0377f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18282' (ECDSA) to the list of known hosts. 2023/06/19 21:54:17 fuzzer started 2023/06/19 21:54:17 dialing manager at localhost:44161 2023/06/19 21:54:17 checking machine... 2023/06/19 21:54:17 checking revisions... [ 35.062351] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:54:17 testing simple program... [ 35.109555] cgroup: Unknown subsys name 'net' [ 35.164870] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:54:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fee3fd464a0 CR3=000000000c6ca000 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=e95835df4daf8da3a24f1dd7ba5d49b7 XMM02=000000000011ddf0eff9b2d0a8fce9cb XMM03=000000000011dec02c67c8bc2e329bc3 XMM04=618fba3198e46ddc00000000000ae988 XMM05=1dc04956ff179a9c0000000000135150 XMM06=4fda316b135da52b00000000001341f0 XMM07=e042d86d42eb936e0000000000124a80 XMM08=4c722153ed981ecb000000000011dec0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8609675b RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880169275f8 RSP=ffff8880169274e0 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888016927600 R13=ffff8880169275e8 R14=ffff8880169275e1 R15=ffff8880169275a0 RIP=ffffffff81130abf 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 00007f22c78c7900 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=00007ffd2d16f000 CR3=000000000f6da000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000