syzkaller login: [ 30.592132] BUG: Bad rss-counter state mm:0000000050503fbb type:MM_FILEPAGES val:33 [ 30.593759] BUG: Bad rss-counter state mm:0000000050503fbb type:MM_ANONPAGES val:22 [ 30.766050] ================================================================== [ 30.767211] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.768514] Read of size 8 at addr ffff8880164b9df0 by task sshd/220 [ 30.769510] [ 30.769784] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.770956] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.772265] Call Trace: [ 30.772712] [ 30.773094] dump_stack_lvl+0x91/0xf0 [ 30.773750] print_report+0xcc/0x620 [ 30.774405] ? __virt_addr_valid+0x102/0x340 [ 30.775145] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775975] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.776825] kasan_report+0xbe/0xf0 [ 30.777459] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.778289] vma_interval_tree_remove+0xc75/0xec0 [ 30.779097] vma_prepare+0xc54/0x11a0 [ 30.779739] __split_vma+0x5af/0x950 [ 30.780377] ? __pfx___split_vma+0x10/0x10 [ 30.781114] ? find_held_lock+0x2c/0x110 [ 30.781774] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.782296] ? lock_is_held_type+0x9f/0x120 [ 30.782788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.783352] ? mtree_range_walk+0x632/0x900 [ 30.783868] ? mas_walk+0x5c7/0x7c0 [ 30.784310] do_vmi_munmap+0x1f1/0x2b0 [ 30.784782] mmap_region+0x1f9/0x2660 [ 30.785224] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.785686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.786357] ? __pfx_lock_acquire+0x10/0x10 [ 30.786854] ? __pfx_mmap_region+0x10/0x10 [ 30.787341] ? security_mmap_addr+0x7d/0xa0 [ 30.787830] ? get_unmapped_area+0x1f5/0x3f0 [ 30.788342] do_mmap+0x854/0xf00 [ 30.788763] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.789224] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.789745] ksys_mmap_pgoff+0x3af/0x500 [ 30.790218] do_syscall_64+0x3f/0x90 [ 30.790656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.791257] RIP: 0033:0x7efd7845bd82 [ 30.791680] 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 [ 30.793657] RSP: 002b:00007fff670e9898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.794439] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd7845bd82 [ 30.795179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd77895000 [ 30.795910] RBP: 00007efd77895000 R08: 0000000000000009 R09: 0000000000001000 [ 30.796656] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec36f24f70 [ 30.797395] R13: 00007fff670e98b0 R14: 00007fff670e98e0 R15: 00007fff670e9c40 [ 30.798141] [ 30.798395] [ 30.798579] Allocated by task 213: [ 30.798957] kasan_save_stack+0x22/0x50 [ 30.799400] kasan_set_track+0x25/0x30 [ 30.799825] __kasan_slab_alloc+0x59/0x70 [ 30.800277] kmem_cache_alloc+0x16b/0x370 [ 30.800739] vm_area_dup+0x20/0x160 [ 30.801135] __split_vma+0x170/0x950 [ 30.801541] split_vma+0xc6/0x110 [ 30.801918] mprotect_fixup+0x8d2/0xb30 [ 30.802353] do_mprotect_pkey+0x87e/0xd40 [ 30.802807] __x64_sys_mprotect+0x78/0xc0 [ 30.803258] do_syscall_64+0x3f/0x90 [ 30.803674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804232] [ 30.804413] Freed by task 213: [ 30.804768] kasan_save_stack+0x22/0x50 [ 30.805212] kasan_set_track+0x25/0x30 [ 30.805636] kasan_save_free_info+0x2b/0x50 [ 30.806100] __kasan_slab_free+0x10a/0x190 [ 30.806565] kmem_cache_free+0x10d/0x4d0 [ 30.807002] rcu_core+0x8c8/0x2860 [ 30.807394] __do_softirq+0x1b7/0x7d4 [ 30.807813] [ 30.807998] Last potentially related work creation: [ 30.808503] kasan_save_stack+0x22/0x50 [ 30.808955] __kasan_record_aux_stack+0x8e/0xa0 [ 30.809528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.810079] remove_vma+0x139/0x170 [ 30.810483] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.810964] do_vmi_munmap+0x1f1/0x2b0 [ 30.811386] __vm_munmap+0x138/0x3a0 [ 30.811828] __x64_sys_munmap+0x59/0x80 [ 30.812261] do_syscall_64+0x3f/0x90 [ 30.812657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813182] [ 30.813358] The buggy address belongs to the object at ffff8880164b9d98 [ 30.813358] which belongs to the cache vm_area_struct of size 168 [ 30.814559] The buggy address is located 88 bytes inside of [ 30.814559] freed 168-byte region [ffff8880164b9d98, ffff8880164b9e40) [ 30.815712] [ 30.815888] The buggy address belongs to the physical page: [ 30.816440] page:00000000a7e9f62d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164b9 [ 30.817340] memcg:ffff8880167ce401 [ 30.817683] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.818206] page_type: 0xffffffff() [ 30.818572] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.819320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167ce401 [ 30.820060] page dumped because: kasan: bad access detected [ 30.820612] [ 30.820787] Memory state around the buggy address: [ 30.821258] ffff8880164b9c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.821951] ffff8880164b9d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.822640] >ffff8880164b9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.823339] ^ [ 30.823996] ffff8880164b9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.824701] ffff8880164b9e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.825390] ================================================================== [ 30.826170] Disabling lock debugging due to kernel taint [ 33.080993] BUG: Bad rss-counter state mm:00000000562682f1 type:MM_FILEPAGES val:33 [ 33.082171] BUG: Bad rss-counter state mm:00000000562682f1 type:MM_ANONPAGES val:22 [ 33.470833] BUG: Bad rss-counter state mm:00000000d965eb63 type:MM_FILEPAGES val:33 [ 33.472003] BUG: Bad rss-counter state mm:00000000d965eb63 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15608' (ECDSA) to the list of known hosts. 2023/06/20 23:23:45 fuzzer started 2023/06/20 23:23:45 dialing manager at localhost:36067 2023/06/20 23:23:45 checking machine... 2023/06/20 23:23:45 checking revisions... [ 34.228708] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:23:45 testing simple program... [ 34.279437] cgroup: Unknown subsys name 'net' [ 34.316211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:23:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880094da6d8 RCX=0000000000000000 RDX=ffff888015d53680 RSI=0000000000000004 RDI=ffff888008fe8158 RBP=ffff88800d977c48 RSP=ffff88800d977b20 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000000e R11=0000000000000000 R12=ffff888008fe8158 R13=00000000000000e5 R14=ffff888008fe8000 R15=ffff8880094da600 RIP=ffffffff8180fea4 RFL=00000093 [--S-A-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 00007f10e478f900 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=00007f10e4d46618 CR3=000000000fc90000 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=dffffc0000000000 RBX=ffffffff8180c705 RCX=ffffffff86138e01 RDX=1ffff1100d9e135e RSI=0000000000000000 RDI=ffffffff8180c705 RBP=ffffffff8180c705 RSP=ffff88806cf09a50 R8 =ffffffff86138e90 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88801983b2e0 RIP=ffffffff811fc6f0 RFL=00000292 [--S-A--] 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=00007f3a422a18f0 CR3=000000000d57c000 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=33f3c7f4f544efbedf4a077f8480b992 XMM02=ec2efd57dc4c00df000000000011a880 XMM03=1fc9d22faa897ccb000000000011a950 XMM04=87b8deae024ac6ff00000000000ae988 XMM05=bf628fc9ebf52dc90000000000132600 XMM06=4fda316b135da52b0000000000131a28 XMM07=e042d86d42eb936e0000000000121fd8 XMM08=1fc9d22faa897ccb000000000011a950 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000