syzkaller login: [ 93.603522] BUG: Bad rss-counter state mm:00000000c55e50be type:MM_FILEPAGES val:33 [ 93.604633] BUG: Bad rss-counter state mm:00000000c55e50be type:MM_ANONPAGES val:22 [ 93.777050] ================================================================== [ 93.777991] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 93.778937] Read of size 8 at addr ffff888019dfaa50 by task sshd/227 [ 93.779829] [ 93.780052] CPU: 0 PID: 227 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 93.781092] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 93.782069] Call Trace: [ 93.782393] [ 93.782683] dump_stack_lvl+0x91/0xf0 [ 93.783207] print_report+0xcc/0x620 [ 93.783698] ? __virt_addr_valid+0x102/0x340 [ 93.784246] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.784857] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.785472] kasan_report+0xbe/0xf0 [ 93.785946] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.786578] vma_interval_tree_remove+0xc75/0xec0 [ 93.787193] vma_prepare+0xc54/0x11a0 [ 93.787672] __split_vma+0x5af/0x950 [ 93.788146] ? __pfx___split_vma+0x10/0x10 [ 93.788674] ? find_held_lock+0x2c/0x110 [ 93.789200] do_vmi_align_munmap+0x2ba/0x11f0 [ 93.789766] ? lock_is_held_type+0x9f/0x120 [ 93.790304] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 93.790915] ? mtree_range_walk+0x632/0x900 [ 93.791496] ? mas_walk+0x5c7/0x7c0 [ 93.791973] do_vmi_munmap+0x1f1/0x2b0 [ 93.792468] mmap_region+0x1f9/0x2660 [ 93.792950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 93.793457] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 93.794169] ? __pfx_lock_acquire+0x10/0x10 [ 93.794705] ? __pfx_mmap_region+0x10/0x10 [ 93.795248] ? security_mmap_addr+0x7d/0xa0 [ 93.795777] ? get_unmapped_area+0x1f5/0x3f0 [ 93.796329] do_mmap+0x854/0xf00 [ 93.796765] vm_mmap_pgoff+0x1a6/0x3a0 [ 93.797262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 93.797827] ksys_mmap_pgoff+0x3af/0x500 [ 93.798330] do_syscall_64+0x3f/0x90 [ 93.798820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.799482] RIP: 0033:0x7fe77106cd82 [ 93.799938] 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 [ 93.802061] RSP: 002b:00007ffe91a364b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 93.802978] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe77106cd82 [ 93.803832] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7704a6000 [ 93.804683] RBP: 00007fe7704a6000 R08: 0000000000000009 R09: 0000000000001000 [ 93.805537] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576a4c77f70 [ 93.806377] R13: 00007ffe91a364d0 R14: 00007ffe91a36500 R15: 00007ffe91a36860 [ 93.807243] [ 93.807537] [ 93.807751] Allocated by task 220: [ 93.808182] kasan_save_stack+0x22/0x50 [ 93.808688] kasan_set_track+0x25/0x30 [ 93.809183] __kasan_slab_alloc+0x59/0x70 [ 93.809703] kmem_cache_alloc+0x16b/0x370 [ 93.810219] vm_area_dup+0x20/0x160 [ 93.810680] __split_vma+0x170/0x950 [ 93.811164] split_vma+0xc6/0x110 [ 93.811604] mprotect_fixup+0x8d2/0xb30 [ 93.812108] do_mprotect_pkey+0x87e/0xd40 [ 93.812631] __x64_sys_mprotect+0x78/0xc0 [ 93.813156] do_syscall_64+0x3f/0x90 [ 93.813624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.814268] [ 93.814481] Freed by task 220: [ 93.814877] kasan_save_stack+0x22/0x50 [ 93.815384] kasan_set_track+0x25/0x30 [ 93.815885] kasan_save_free_info+0x2b/0x50 [ 93.816419] __kasan_slab_free+0x10a/0x190 [ 93.816962] kmem_cache_free+0x10d/0x4d0 [ 93.817470] rcu_core+0x8c8/0x2860 [ 93.817916] __do_softirq+0x1b7/0x7d4 [ 93.818388] [ 93.818601] Last potentially related work creation: [ 93.819196] kasan_save_stack+0x22/0x50 [ 93.819708] __kasan_record_aux_stack+0x8e/0xa0 [ 93.820285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 93.820923] remove_vma+0x139/0x170 [ 93.821376] do_vmi_align_munmap+0xd4a/0x11f0 [ 93.821936] do_vmi_munmap+0x1f1/0x2b0 [ 93.822418] __vm_munmap+0x138/0x3a0 [ 93.822881] __x64_sys_munmap+0x59/0x80 [ 93.823404] do_syscall_64+0x3f/0x90 [ 93.823877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.824514] [ 93.824731] The buggy address belongs to the object at ffff888019dfa9f8 [ 93.824731] which belongs to the cache vm_area_struct of size 168 [ 93.826196] The buggy address is located 88 bytes inside of [ 93.826196] freed 168-byte region [ffff888019dfa9f8, ffff888019dfaaa0) [ 93.827608] [ 93.827823] The buggy address belongs to the physical page: [ 93.828482] page:000000009b217daa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dfa [ 93.829585] memcg:ffff88800e531701 [ 93.830012] flags: 0x100000000000200(slab|node=0|zone=1) [ 93.830653] page_type: 0xffffffff() [ 93.831112] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 93.832034] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e531701 [ 93.832947] page dumped because: kasan: bad access detected [ 93.833608] [ 93.833825] Memory state around the buggy address: [ 93.834407] ffff888019dfa900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 93.835284] ffff888019dfa980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 93.836136] >ffff888019dfaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 93.836994] ^ [ 93.837688] ffff888019dfaa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 93.838540] ffff888019dfab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 93.839395] ================================================================== [ 93.840412] Disabling lock debugging due to kernel taint [ 95.492555] BUG: Bad rss-counter state mm:00000000cf6bfb4c type:MM_FILEPAGES val:33 [ 95.493291] BUG: Bad rss-counter state mm:00000000cf6bfb4c type:MM_ANONPAGES val:22 [ 95.845296] BUG: Bad rss-counter state mm:00000000ff04ca7f type:MM_FILEPAGES val:33 [ 95.846074] BUG: Bad rss-counter state mm:00000000ff04ca7f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6027' (ECDSA) to the list of known hosts. 2023/06/20 00:21:59 fuzzer started 2023/06/20 00:21:59 dialing manager at localhost:44161 2023/06/20 00:21:59 checking machine... 2023/06/20 00:21:59 checking revisions... [ 96.492734] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:21:59 testing simple program... [ 96.548552] cgroup: Unknown subsys name 'net' [ 96.589702] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:21:04 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=0000000000000001 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=00007ffd24d11558 CR3=0000000005482000 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=00007fb05620f5100000560d26913790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffd400006b14d RBX=ffffea0000358a40 RCX=0000000000000000 RDX=ffff8880102a51c0 RSI=ffffffff8175d121 RDI=ffffea0000358a68 RBP=ffff88800efb8038 RSP=ffff88800d6f7af0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=ffff88800d629068 R13=1ffff11001adef62 R14=dffffc0000000000 R15=00007f4600e0d000 RIP=ffffffff8175d14f 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f46019d7900 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=00007f4600e0d8a0 CR3=000000000d922000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c816a0df7097d4f600000000000ae988 XMM05=69ba0017ddfcae97000000000013a4d0 XMM06=5ce3fe0f8da479eb0000000000138f00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000