syzkaller login: [ 31.721420] BUG: Bad rss-counter state mm:0000000099e66af7 type:MM_FILEPAGES val:33 [ 31.722595] BUG: Bad rss-counter state mm:0000000099e66af7 type:MM_ANONPAGES val:22 [ 31.885803] ================================================================== [ 31.886727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.887660] Read of size 8 at addr ffff8880166fab38 by task sshd/227 [ 31.888420] [ 31.888643] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.889644] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.890621] Call Trace: [ 31.890940] [ 31.891225] dump_stack_lvl+0x91/0xf0 [ 31.891741] print_report+0xcc/0x620 [ 31.892224] ? __virt_addr_valid+0x102/0x340 [ 31.892773] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.893386] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.894014] kasan_report+0xbe/0xf0 [ 31.894491] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.895104] vma_interval_tree_remove+0xc75/0xec0 [ 31.895711] vma_prepare+0xc54/0x11a0 [ 31.896201] __split_vma+0x5af/0x950 [ 31.896674] ? __pfx___split_vma+0x10/0x10 [ 31.897201] ? find_held_lock+0x2c/0x110 [ 31.897729] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.898300] ? lock_is_held_type+0x9f/0x120 [ 31.898840] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.899445] ? mtree_range_walk+0x632/0x900 [ 31.900001] ? mas_walk+0x5c7/0x7c0 [ 31.900479] do_vmi_munmap+0x1f1/0x2b0 [ 31.900972] mmap_region+0x1f9/0x2660 [ 31.901452] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.901983] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.902705] ? __pfx_lock_acquire+0x10/0x10 [ 31.903238] ? __pfx_mmap_region+0x10/0x10 [ 31.903761] ? security_mmap_addr+0x7d/0xa0 [ 31.904294] ? get_unmapped_area+0x1f5/0x3f0 [ 31.904842] do_mmap+0x854/0xf00 [ 31.905279] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.905783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.906344] ksys_mmap_pgoff+0x3af/0x500 [ 31.906853] do_syscall_64+0x3f/0x90 [ 31.907334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.907983] RIP: 0033:0x7fce6e05ed82 [ 31.908437] 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 [ 31.910605] RSP: 002b:00007fff761f9ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.911528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce6e05ed82 [ 31.912392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce6d498000 [ 31.913258] RBP: 00007fce6d498000 R08: 0000000000000009 R09: 0000000000001000 [ 31.914125] R10: 0000000000000812 R11: 0000000000000206 R12: 000056090ce77f60 [ 31.914994] R13: 00007fff761f9f10 R14: 00007fff761f9f40 R15: 00007fff761fa2a0 [ 31.915854] [ 31.916152] [ 31.916371] Allocated by task 220: [ 31.916801] kasan_save_stack+0x22/0x50 [ 31.917309] kasan_set_track+0x25/0x30 [ 31.917829] __kasan_slab_alloc+0x59/0x70 [ 31.918356] kmem_cache_alloc+0x16b/0x370 [ 31.918874] vm_area_dup+0x20/0x160 [ 31.919332] __split_vma+0x170/0x950 [ 31.919805] split_vma+0xc6/0x110 [ 31.920258] mprotect_fixup+0x8d2/0xb30 [ 31.920764] do_mprotect_pkey+0x87e/0xd40 [ 31.921286] __x64_sys_mprotect+0x78/0xc0 [ 31.921830] do_syscall_64+0x3f/0x90 [ 31.922300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.922936] [ 31.923149] Freed by task 220: [ 31.923538] kasan_save_stack+0x22/0x50 [ 31.924039] kasan_set_track+0x25/0x30 [ 31.924545] kasan_save_free_info+0x2b/0x50 [ 31.925085] __kasan_slab_free+0x10a/0x190 [ 31.925648] kmem_cache_free+0x10d/0x4d0 [ 31.926160] rcu_core+0x8c8/0x2860 [ 31.926608] __do_softirq+0x1b7/0x7d4 [ 31.927097] [ 31.927312] Last potentially related work creation: [ 31.927906] kasan_save_stack+0x22/0x50 [ 31.928416] __kasan_record_aux_stack+0x8e/0xa0 [ 31.928990] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.929657] remove_vma+0x139/0x170 [ 31.930122] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.930686] do_vmi_munmap+0x1f1/0x2b0 [ 31.931180] __vm_munmap+0x138/0x3a0 [ 31.931654] __x64_sys_munmap+0x59/0x80 [ 31.932155] do_syscall_64+0x3f/0x90 [ 31.932642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.933297] [ 31.933515] The buggy address belongs to the object at ffff8880166faae0 [ 31.933515] which belongs to the cache vm_area_struct of size 168 [ 31.935013] The buggy address is located 88 bytes inside of [ 31.935013] freed 168-byte region [ffff8880166faae0, ffff8880166fab88) [ 31.936444] [ 31.936662] The buggy address belongs to the physical page: [ 31.937329] page:000000006a242d1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166fa [ 31.938455] memcg:ffff888015ca7001 [ 31.938888] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.939537] page_type: 0xffffffff() [ 31.939993] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.940916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ca7001 [ 31.941835] page dumped because: kasan: bad access detected [ 31.942491] [ 31.942739] Memory state around the buggy address: [ 31.943331] ffff8880166faa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.944186] ffff8880166faa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.945049] >ffff8880166fab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.945907] ^ [ 31.946523] ffff8880166fab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.947367] ffff8880166fac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.948216] ================================================================== [ 31.949381] Disabling lock debugging due to kernel taint [ 33.850502] BUG: Bad rss-counter state mm:000000006f3b8575 type:MM_FILEPAGES val:33 [ 33.851250] BUG: Bad rss-counter state mm:000000006f3b8575 type:MM_ANONPAGES val:22 [ 34.288036] BUG: Bad rss-counter state mm:000000007c28c2dc type:MM_FILEPAGES val:33 [ 34.288829] BUG: Bad rss-counter state mm:000000007c28c2dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13415' (ECDSA) to the list of known hosts. 2023/06/21 03:33:24 fuzzer started 2023/06/21 03:33:24 dialing manager at localhost:36067 2023/06/21 03:33:24 checking machine... 2023/06/21 03:33:24 checking revisions... [ 35.044683] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:33:24 testing simple program... [ 35.107296] cgroup: Unknown subsys name 'net' [ 35.144885] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:33:23 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88800e6ab260 RCX=0000000000000000 RDX=ffffffff87b89c40 RSI=ffffffff848ff1e0 RDI=ffff88800e6ab278 RBP=ffffffff848ff1e0 RSP=ffff88801478f990 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff87b89c40 R13=0000000000000002 R14=ffff88800e6ab2a8 R15=ffff88800e6ab260 RIP=ffffffff812db284 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 00007ff8cd538900 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=00007ff8cc982f80 CR3=0000000008ec6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=56ea88b9e01059a300000000000ae988 XMM05=2d56d5f618e32e7d00000000001329c0 XMM06=e8008b1642ea3e600000000000131440 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=ffff88807ffd7010 RCX=0000000000000100 RDX=1ffff1100fffae02 RSI=ffffffff8114328a RDI=0000000000000006 RBP=000000000e703080 RSP=ffff88806cf09d60 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=00000000000b6a61 R12=ffff88807ffd7000 R13=ffff88807ffd8000 R14=ffffffff8186b835 R15=ffff88800e95e600 RIP=ffffffff8114329f 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 00007f555351a900 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=00007ffd44e04000 CR3=000000001905a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000